:root {
    --primary-color: #333;
    --background-color: #f4f4f4;
    --card-background: var(--bg-white);
    --header-background: #f0f0f0;
    --button-background: rgba(var(--shadow-color), 0.2);
    --button-hover: rgba(var(--shadow-color), 0.3);
    --table-row-even: #f8f9fa;
    --table-row-hover: rgba(var(--shadow-color), 0.05);
    --table-gradient-start: #ffffff;
    --table-gradient-end: #f8f9fa;
    --border-radius: 8px;
    --spacing: 8px;

    /* Semantic Text Colors */
    --text-color: #333;
    --text-muted: #555;
    --text-light: #666;
    --text-lighter: #888;
    --text-lightest: #bbb;

    /* Borders */
    --border-color: #eee;
    --border-color-dark: #ddd;
    --border-color-darker: #ccc;
    --border-color-darkest: #e0e0e0;

    /* UI States - High Contrast optimized */
    --error-color: #a80000;
    --error-bg: #ffeaea;
    --success-color: #005a2b;
    --success-bg: #e0f5e9;

    /* Backgrounds */
    --bg-white: white;
    --text-inverse: white;

    /* Box shadows & Opacities */
    --shadow-color: 0, 0, 0;
    --glass-color: 255, 255, 255;
    --glass-mid-color: 248, 249, 250;
    --glass-border-color: 0, 0, 0;

    /* Overlay */
    --overlay-bg: rgba(var(--shadow-color), 0.5);
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #ededed;
        --background-color: #000000;
        --card-background: #111111;
        --header-background: #1a1a1a;
        --button-background: rgba(255, 255, 255, 0.05);
        --button-hover: rgba(255, 255, 255, 0.1);
        --table-row-even: #171717;
        --table-row-hover: rgba(255, 255, 255, 0.08);
        --table-gradient-start: #111111;
        --table-gradient-end: #171717;

        --text-color: #ededed;
        --text-muted: #a1a1aa;
        --text-light: #71717a;
        --text-lighter: #52525b;
        --text-lightest: #3f3f46;

        --border-color: #333333;
        --border-color-dark: #27272a;
        --border-color-darker: #3f3f46;
        --border-color-darkest: #52525b;

        --error-color: #ff7575;
        --error-bg: rgba(255, 75, 75, 0.15);
        --success-color: #61de7a;
        --success-bg: rgba(97, 222, 122, 0.15);

        --bg-white: #111111;
        --text-inverse: #000000;

        --shadow-color: 0, 0, 0;
        --glass-color: 30, 30, 30;
        --glass-mid-color: 20, 20, 20;
        --glass-border-color: 255, 255, 255;

        --overlay-bg: rgba(0, 0, 0, 0.8);
    }

    .course-filter::after {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%23ededed' d='M7 10L2 5h10z'/%3E%3C/svg%3E");
    }

    select {
        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ededed'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    }

    .form-group input,
    select {
        color: var(--text-color) !important;
        background-color: var(--bg-white) !important;
    }
}

/* Desktop: Größeres Spacing */
@media screen and (min-width: 769px) {
    :root {
        --spacing: 12px;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 8px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Desktop: Größerer Padding */
@media screen and (min-width: 769px) {
    body {
        padding: 12px;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--card-background);
    padding: 16px;
    border-radius: 12px;
    box-shadow:
        0 2px 8px rgba(var(--shadow-color), 0.04),
        0 1px 2px rgba(var(--shadow-color), 0.02);
}

/* Desktop: Größerer Padding - Perfekte Symmetrie */
@media screen and (min-width: 769px) {
    .container {
        padding: 24px 32px;
        border-radius: 16px;
    }
}

/* Page Header - Marketing-Perfekt - Kompakt */
.page-header {
    background: linear-gradient(135deg,
            rgba(var(--glass-color), 0.95) 0%,
            rgba(var(--glass-mid-color), 0.98) 50%,
            rgba(var(--glass-color), 0.95) 100%);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 20px;
    border: 1px solid rgba(var(--glass-border-color), 0.04);
    box-shadow:
        0 1px 3px rgba(var(--shadow-color), 0.04),
        0 4px 12px rgba(var(--shadow-color), 0.02);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(var(--shadow-color), 0.06) 50%,
            transparent 100%);
}

.header-content {
    text-align: center;
    max-width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--primary-color);
    font-size: 1.25rem;
    margin: 0 0 10px 0;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.header-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    stroke: var(--primary-color);
    opacity: 0.85;
    filter: drop-shadow(0 1px 2px rgba(var(--shadow-color), 0.05));
}

.date-display {
    text-align: center;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0.8;
    padding: 8px 16px;
    background: rgba(var(--glass-color), 0.8);
    border: 1px solid rgba(var(--glass-border-color), 0.06);
    border-radius: 8px;
    display: inline-block;
    min-height: 32px;
    line-height: 1.4;
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
}

.date-display:hover {
    opacity: 1;
    box-shadow:
        0 2px 4px rgba(var(--shadow-color), 0.06),
        inset 0 1px 1px rgba(var(--glass-color), 0.95);
}

.stand-display {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 400;
    margin-top: 4px;
    opacity: 0.7;
    letter-spacing: 0.01em;
}

/* Desktop: Kompakter Header */
@media screen and (min-width: 769px) {
    .page-header {
        padding: 20px 24px;
        margin-bottom: 24px;
        border-radius: 12px;
    }

    h1 {
        font-size: 1.5rem;
        margin-bottom: 12px;
        gap: 12px;
        letter-spacing: -0.025em;
    }

    .header-icon {
        width: 28px;
        height: 28px;
    }

    .date-display {
        font-size: 0.9375rem;
        padding: 10px 18px;
        min-height: 36px;
        border-radius: 8px;
    }
}

/* Controls - Perfekte Symmetrie & Balance */
.controls {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 24px;
    align-items: stretch;
    max-width: 100%;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.control-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
    margin-bottom: 0;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    opacity: 0.75;
    height: 24px;
}

.label-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke: var(--primary-color);
    opacity: 0.65;
    stroke-width: 2.2;
}

/* Desktop: Horizontales Layout - Perfekte Balance - Gleiche Höhe */
@media screen and (min-width: 769px) {
    .controls {
        flex-direction: row;
        gap: 32px;
        align-items: flex-start;
        justify-content: center;
        margin-bottom: 32px;
    }

    .control-group {
        flex: 1;
        max-width: 420px;
        min-width: 280px;
        display: flex;
        flex-direction: column;
    }

    /* Labels auf gleicher Höhe ausrichten */
    .control-label {
        font-size: 0.8125rem;
        margin-bottom: 0;
        letter-spacing: 0.05em;
        height: 28px;
        display: flex;
        align-items: center;
        min-height: 28px;
        max-height: 28px;
    }

    /* Gleicher Abstand zwischen Label und Input für beide Gruppen */
    .control-group {
        gap: 8px;
    }

    .label-icon {
        width: 20px;
        height: 20px;
    }

    /* Input-Felder auf gleicher Höhe */
    .date-controls {
        display: flex;
        align-items: stretch;
        gap: 12px;
    }

    .course-selection {
        display: flex;
        flex-direction: column;
        gap: 10px;
        min-height: 48px;
    }

    /* Gleiche Höhe für alle Input-Elemente */
    .date-picker-trigger,
    .action-button,
    .course-filter {
        height: 48px !important;
        min-height: 48px !important;
        max-height: 48px !important;
        box-sizing: border-box;
        line-height: 1.5;
    }

    /* Container auf gleicher Höhe */
    .date-controls,
    .course-selection {
        align-items: stretch;
    }

    .date-controls .custom-date-picker,
    .course-selection {
        display: flex;
        flex-direction: column;
    }

    /* Sicherstellen, dass alle Elemente in date-controls die gleiche Höhe haben */
    .date-controls>* {
        display: flex;
        align-items: stretch;
    }

    .date-controls .custom-date-picker {
        display: flex;
        flex-direction: column;
    }

    .date-controls .date-picker-trigger {
        flex: 1;
    }
}

.button-group {
    display: flex;
    gap: var(--spacing);
}

.date-controls {
    display: flex;
    gap: 10px;
    align-items: stretch;
    flex-wrap: wrap;
    width: 100%;
    min-height: 48px;
}

.date-controls>* {
    flex: 1;
    min-width: 0;
}

/* Perfekte Symmetrie für Date Controls */
.date-controls .custom-date-picker {
    flex: 1.5;
    min-width: 200px;
    display: flex;
    flex-direction: column;
}

.date-controls .action-button {
    flex: 1;
    min-width: 120px;
}

.action-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: rgba(var(--glass-color), 0.9);
    color: var(--primary-color);
    padding: 14px 18px;
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 48px;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
    letter-spacing: 0.01em;
}

.action-button:hover {
    background: rgba(var(--glass-color), 1);
    border-color: rgba(var(--glass-border-color), 0.12);
    box-shadow:
        0 2px 4px rgba(var(--shadow-color), 0.06),
        inset 0 1px 1px rgba(var(--glass-color), 1);
    transform: translateY(-1px);
}

.action-button:active {
    transform: translateY(0);
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
}

.action-button.active {
    background: var(--button-hover);
    border-color: rgba(var(--glass-border-color), 0.15);
    box-shadow:
        0 2px 8px rgba(var(--shadow-color), 0.12),
        0 1px 2px rgba(var(--shadow-color), 0.08);
}

.button-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: currentColor;
    stroke-width: 2.2;
}

/* Desktop: Kompakteres Layout - Perfekte Symmetrie */
@media screen and (min-width: 769px) {
    .date-controls {
        flex-wrap: nowrap;
        gap: 12px;
    }

    .date-controls .custom-date-picker {
        flex: 1.5;
        min-width: 220px;
    }

    .date-controls .action-button {
        padding: 13px 22px;
        min-height: auto;
        flex: 1;
        min-width: 140px;
    }

    .date-picker-trigger {
        min-width: 220px;
    }
}

/* Custom Date Picker */
.custom-date-picker {
    position: relative;
    display: inline-block;
    width: 100%;
    order: 1;
}

/* Desktop: Auto-Breite */
@media screen and (min-width: 769px) {
    .custom-date-picker {
        width: auto;
        order: 0;
    }
}

.date-picker-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: rgba(var(--glass-color), 0.9);
    color: var(--primary-color);
    padding: 13px 18px;
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
    height: 48px;
    min-height: 48px;
    max-height: 48px;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
    letter-spacing: 0.01em;
    line-height: 1.5;
    box-sizing: border-box;
}

/* Desktop: Feste Breite */
@media screen and (min-width: 769px) {
    .date-picker-trigger {
        width: auto;
        min-width: 200px;
        padding: 13px 20px;
        height: 48px;
        min-height: 48px;
        max-height: 48px;
    }
}

.date-picker-trigger:hover {
    background: rgba(var(--glass-color), 1);
    border-color: rgba(var(--glass-border-color), 0.12);
    box-shadow:
        0 2px 4px rgba(var(--shadow-color), 0.06),
        inset 0 1px 1px rgba(var(--glass-color), 1);
    transform: translateY(-1px);
}

.date-picker-trigger:active {
    transform: translateY(0);
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
}

.date-picker-trigger.active {
    background: var(--button-hover);
    border-color: rgba(var(--glass-border-color), 0.15);
    box-shadow:
        0 2px 8px rgba(var(--shadow-color), 0.12),
        0 1px 2px rgba(var(--shadow-color), 0.08);
    font-weight: 600;
}

.date-picker-trigger .calendar-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.date-picker-dropdown {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 16px 50px rgba(var(--shadow-color), 0.2), 0 8px 24px rgba(var(--shadow-color), 0.15);
    padding: 14px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: calc(100% - 24px);
    max-width: 340px;
    max-height: 90vh;
    overflow-y: auto;
}

/* Desktop: Absolute Position */
@media screen and (min-width: 769px) {
    .date-picker-dropdown {
        position: absolute;
        top: calc(100% + 8px);
        transform: translateX(-50%) scale(0.95);
        padding: 16px;
        width: auto;
        min-width: 300px;
        max-width: none;
        max-height: none;
        overflow-y: visible;
    }
}

.date-picker-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* Desktop: Korrekte Transform */
@media screen and (min-width: 769px) {
    .date-picker-dropdown.active {
        transform: translateX(-50%) scale(1);
    }
}

.date-picker-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.date-picker-header .current-month {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 0.3px;
    flex: 1;
    text-align: center;
}

.date-picker-header .nav-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--button-background);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    padding: 0;
    min-width: unset;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

/* Desktop: Kleinere Buttons */
@media screen and (min-width: 769px) {
    .date-picker-header {
        margin-bottom: 16px;
        padding-bottom: 12px;
    }

    .date-picker-header .current-month {
        font-size: 1rem;
    }

    .date-picker-header .nav-btn {
        width: 32px;
        height: 32px;
    }
}

.date-picker-header .nav-btn:hover {
    background: var(--button-hover);
}

.date-picker-header .nav-btn svg {
    width: 16px;
    height: 16px;
}

.date-picker-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 8px;
}

.date-picker-weekdays span {
    text-align: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-lighter);
    padding: 6px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Desktop: Größerer Text */
@media screen and (min-width: 769px) {
    .date-picker-weekdays {
        gap: 4px;
        margin-bottom: 10px;
    }

    .date-picker-weekdays span {
        font-size: 0.75rem;
        padding: 8px 0;
        letter-spacing: 1px;
    }
}

.date-picker-weekdays .weekend {
    color: var(--border-color-darker);
}

.date-picker-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    justify-items: center;
}

.date-picker-days .day {
    position: relative;
    width: 42px;
    height: 42px;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    min-width: unset;
    -webkit-tap-highlight-color: transparent;
}

/* Desktop: Kleinere Buttons */
@media screen and (min-width: 769px) {
    .date-picker-days {
        gap: 4px;
        justify-items: stretch;
    }

    .date-picker-days .day {
        width: 40px;
        height: 40px;
    }
}

.date-picker-days .day:hover:not(.disabled):not(.weekend) {
    background: var(--button-hover);
    color: var(--primary-color);
}

.date-picker-days .day.today {
    background: var(--header-background);
    font-weight: 700;
    position: relative;
}

.date-picker-days .day.today::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
}

.date-picker-days .day.selected {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.date-picker-days .day.has-data::after {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background: var(--accent-color);
    border-radius: 50%;
}

.date-picker-days .day.other-month {
    color: var(--border-color-darker);
}

.date-picker-days .day.weekend {
    color: var(--text-lightest);
    cursor: not-allowed;
}

.date-picker-days .day.weekend:hover {
    background: transparent;
    transform: none;
    color: var(--text-lightest);
}

.date-picker-days .day.disabled {
    color: var(--border-color-dark);
    cursor: not-allowed;
}

.date-picker-footer {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
}

.date-picker-footer .today-btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: unset;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
}

/* Desktop: Kleinere Buttons */
@media screen and (min-width: 769px) {
    .date-picker-footer {
        margin-top: 12px;
        padding-top: 12px;
    }

    .date-picker-footer .today-btn {
        padding: 8px 20px;
        min-height: auto;
    }
}

.date-picker-footer .today-btn:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
}

.action-button.active {
    background: var(--button-hover);
    box-shadow: 0 2px 8px rgba(var(--shadow-color), 0.15);
}

.course-selection {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.course-filter {
    width: 100%;
    padding: 13px 18px;
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    border-radius: 10px;
    background-color: rgba(var(--glass-color), 0.9);
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    height: 48px;
    min-height: 48px;
    max-height: 48px;
    -webkit-tap-highlight-color: transparent;
    appearance: none;
    padding-right: 44px;
    box-shadow:
        0 1px 2px rgba(var(--shadow-color), 0.04),
        inset 0 1px 1px rgba(var(--glass-color), 0.9);
    letter-spacing: 0.01em;
    line-height: 1.5;
    box-sizing: border-box;
    position: relative;
}

.course-filter::after {
    content: '';
    position: absolute;
    right: 18px;
    top: 50%;
    width: 14px;
    height: 14px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%23333' d='M7 10L2 5h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: contain;
    pointer-events: none;
    opacity: 1;
    transform: translateY(-50%) rotate(0deg);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.course-filter:focus::after,
.course-filter.open::after {
    transform: translateY(-50%) rotate(180deg);
}

.course-filter:hover {
    border-color: rgba(var(--glass-border-color), 0.12);
    background-color: rgba(var(--glass-color), 1);
    box-shadow:
        0 2px 4px rgba(var(--shadow-color), 0.06),
        inset 0 1px 1px rgba(var(--glass-color), 1);
    transform: translateY(-1px);
}

.course-filter:focus {
    outline: none;
    border-color: rgba(var(--glass-border-color), 0.15);
    background-color: rgba(var(--glass-color), 1);
    box-shadow: 0 0 0 3px rgba(var(--glass-border-color), 0.08),
        0 2px 4px rgba(var(--shadow-color), 0.06);
}

.course-filter:active {
    transform: translateY(0);
}

/* Desktop: Standard Button-Größen */
@media screen and (min-width: 769px) {
    .course-filter {
        padding: 13px 44px 13px 20px;
        height: 48px;
        min-height: 48px;
        max-height: 48px;
    }
}

select {
    background: var(--button-background);
    color: var(--text-color);
    padding: 14px 40px 14px 14px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
    min-height: 48px;
    font-family: inherit;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23333'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    -webkit-tap-highlight-color: transparent;
}

/* Desktop: Feste Breite */
@media screen and (min-width: 769px) {
    select {
        width: auto;
        min-width: 200px;
        max-width: 300px;
        padding: 12px 40px 12px 12px;
        min-height: auto;
    }
}

select:hover {
    background-color: var(--button-hover);
}

.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 12px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    /* Verwende Border statt box-shadow, um Überlappungen zu vermeiden */
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    position: relative;
    /* Verhindere, dass der Schatten sich über die Tabelle legt */
    isolation: isolate;
}

.loading-indicator {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease, backdrop-filter 0.3s ease;
    background: rgba(244, 244, 244, 0.9);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 10;
}

.loading-indicator.visible {
    opacity: 1;
    pointer-events: all;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

/* Mindesthöhe nur wenn Loading-Indikator sichtbar ist */
.table-container:has(.loading-indicator.visible) {
    min-height: 200px;
}

.loading-indicator__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 32px 40px;
    border-radius: 16px;
    background: rgba(var(--glass-color), 0.98);
    box-shadow: 0 8px 32px rgba(var(--shadow-color), 0.12), 0 2px 8px rgba(var(--shadow-color), 0.08);
    max-width: 280px;
    text-align: center;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.loading-indicator.visible .loading-indicator__content {
    transform: scale(1);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(var(--glass-border-color), 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: relative;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-indicator span {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9375rem;
    opacity: 0.85;
    letter-spacing: 0.01em;
    line-height: 1.5;
}

/* Visueller Scroll-Indikator für Mobile */
.table-container::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 30px;
    background: linear-gradient(to left, rgba(244, 244, 244, 0.9), transparent);
    pointer-events: none;
    z-index: 0;
    /* Stelle sicher, dass der Indikator nur am rechten Rand ist und nicht über die Tabelle legt */
    margin-right: 0;
}

/* Desktop: Kein Scroll-Indikator */
@media screen and (min-width: 769px) {
    .table-container::before {
        display: none;
    }
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
    background: linear-gradient(to bottom,
            var(--table-gradient-start) 0%,
            var(--table-gradient-end) 100%);
    table-layout: auto;
    /* Stelle sicher, dass die Tabelle korrekt gerendert wird */
    position: relative;
    z-index: 0;
    /* Verhindere, dass Borders sich überlappen */
    border-spacing: 0;
}

th,
td {
    padding: 10px 8px;
    text-align: left;
    border-bottom: 1px solid var(--border-color-dark);
    font-size: 0.85rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    background: transparent;
    transition: background-color 0.1s ease;
    /* Verhindere, dass Borders sich überlappen */
    border-right: none;
    border-left: none;
    border-top: none;
}

/* Desktop: Größere Schrift und Padding */
@media screen and (min-width: 769px) {
    table {
        table-layout: fixed;
    }

    th,
    td {
        padding: 12px;
        font-size: 0.9rem;
    }
}

th {
    background: var(--header-background);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 2;
    border-bottom: 2px solid var(--border-color-dark);
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

/* Desktop: Fettere Schrift */
@media screen and (min-width: 769px) {
    th {
        font-weight: bold;
    }
}

th:hover {
    background-color: var(--button-hover);
}

th.sorted-asc::after {
    content: ' ▲';
    font-size: 0.8em;
}

th.sorted-desc::after {
    content: ' ▼';
    font-size: 0.8em;
}

/* Kurs */
th:nth-child(1),
td:nth-child(1) {
    min-width: 65px;
}

/* Tag */
th:nth-child(2),
td:nth-child(2) {
    min-width: 90px;
}

/* Stunde */
th:nth-child(3),
td:nth-child(3) {
    min-width: 65px;
}

/* Raum */
th:nth-child(4),
td:nth-child(4) {
    min-width: 90px;
}

/* Lehrer */
th:nth-child(5),
td:nth-child(5) {
    min-width: 90px;
}

/* Typ */
th:nth-child(6),
td:nth-child(6) {
    min-width: 90px;
}

/* Notizen */
th:nth-child(7),
td:nth-child(7) {
    min-width: 120px;
}

/* Desktop: Feste Breiten */
@media screen and (min-width: 769px) {

    /* Kurs */
    th:nth-child(1),
    td:nth-child(1) {
        width: 8%;
        min-width: auto;
    }

    /* Tag */
    th:nth-child(2),
    td:nth-child(2) {
        width: 12%;
        min-width: auto;
    }

    /* Stunde */
    th:nth-child(3),
    td:nth-child(3) {
        width: 8%;
        min-width: auto;
    }

    /* Raum */
    th:nth-child(4),
    td:nth-child(4) {
        width: 15%;
        min-width: auto;
    }

    /* Lehrer */
    th:nth-child(5),
    td:nth-child(5) {
        width: 15%;
        min-width: auto;
    }

    /* Typ */
    th:nth-child(6),
    td:nth-child(6) {
        width: 15%;
        min-width: auto;
    }

    /* Notizen */
    th:nth-child(7),
    td:nth-child(7) {
        width: 27%;
        min-width: auto;
    }

    /* Notizen */
}

/* Datumsspalte */
.date-column {
    transition: background-color 0.1s ease;
}

/* Wenn die Datumsspalte ausgeblendet ist, passe die anderen Spaltenbreiten an */
/* Kurs */
.date-column[style*="display: none"]~td:nth-child(1) {
    width: 8%;
}

.date-column[style*="display: none"]~td:nth-child(3) {
    width: 10%;
}

.date-column[style*="display: none"]~td:nth-child(4) {
    width: 15%;
}

.date-column[style*="display: none"]~td:nth-child(5) {
    width: 15%;
}

.date-column[style*="display: none"]~td:nth-child(6) {
    width: 15%;
}

.date-column[style*="display: none"]~td:nth-child(7) {
    width: 37%;
}

/* Wenn die Datumsspalte sichtbar ist */
.date-column:not([style*="display: none"])~td:nth-child(1) {
    width: 8%;
}

.date-column:not([style*="display: none"])~td:nth-child(3) {
    width: 8%;
}

.date-column:not([style*="display: none"])~td:nth-child(4) {
    width: 15%;
}

.date-column:not([style*="display: none"])~td:nth-child(5) {
    width: 15%;
}

.date-column:not([style*="display: none"])~td:nth-child(6) {
    width: 12%;
}

.date-column:not([style*="display: none"])~td:nth-child(7) {
    width: 27%;
}

.date-column:not([style*="display: none"]) {
    width: 15%;
}

tr:nth-child(even) {
    background-color: var(--table-row-even);
}

tr:nth-child(odd) {
    background-color: var(--table-gradient-start);
}

tr:hover td {
    background: var(--table-row-hover);
}

/* Tablet-spezifische Anpassungen */
@media screen and (min-width: 481px) and (max-width: 768px) {
    h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    th,
    td {
        padding: 10px;
        font-size: 0.875rem;
    }
}

/* Landscape-Modus Optimierungen für Mobile */
@media screen and (max-width: 768px) and (orientation: landscape) {
    .controls {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .date-selection {
        flex: 1 1 auto;
        min-width: 250px;
    }

    select {
        flex: 1 1 auto;
        min-width: 180px;
    }

    h1 {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }

    h2 {
        font-size: 1rem;
        margin-bottom: 8px;
    }
}

/* Footer Styles - Mobile First */
.footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 2px solid rgba(var(--glass-border-color), 0.08);
}

.footer-credits {
    text-align: center;
    color: var(--primary-color);
    font-size: 0.85rem;
    margin-bottom: 20px;
    opacity: 0.85;
    font-weight: 500;
    line-height: 1.5;
}

.footer-credits a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
}

.footer-credits a:hover,
.footer-credits a:active {
    opacity: 1;
    text-decoration: underline;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.75;
    transition: all 0.3s ease;
    padding: 10px 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 8px;
    -webkit-tap-highlight-color: transparent;
    border-radius: 8px;
    background: transparent;
}

.footer-link:hover,
.footer-link:active {
    opacity: 1;
    background: rgba(var(--shadow-color), 0.03);
    transform: translateY(-1px);
}

.footer-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke: currentColor;
}

.footer-link span {
    font-weight: 500;
}

/* Desktop: Horizontales Layout */
@media screen and (min-width: 769px) {
    .footer {
        margin-top: 40px;
        padding-top: 32px;
    }

    .footer-credits {
        font-size: 0.9rem;
        margin-bottom: 24px;
    }

    .footer-links {
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        flex-wrap: wrap;
    }

    .footer-link {
        font-size: 0.9rem;
        padding: 8px 16px;
        min-height: auto;
    }

    .footer-link:hover {
        transform: translateY(-2px);
        box-shadow: 0 2px 8px rgba(var(--shadow-color), 0.1);
    }
}

/* Authentication & Header Right */
.header-right {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 10px;
}

@media screen and (min-width: 769px) {
    .page-header .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .header-right {
        margin-top: 0;
        justify-content: flex-end;
    }

    h1 {
        margin-bottom: 0;
    }
}

.auth-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-color);
    color: var(--text-inverse);
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-btn:hover {
    background: var(--text-muted);
    transform: translateY(-1px);
}

.auth-icon {
    width: 18px;
    height: 18px;
}

.user-menu {
    position: relative;
}

.user-btn {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid rgba(var(--glass-border-color), 0.1);
}

.user-btn:hover {
    background: rgba(var(--shadow-color), 0.05);
    color: var(--primary-color);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-white);
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(var(--shadow-color), 0.12);
    min-width: 160px;
    display: none;
    flex-direction: column;
    z-index: 100;
    overflow: hidden;
}

.user-dropdown.show {
    display: flex;
}

.user-dropdown-item {
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    border: none;
    background: transparent;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: background 0.2s;
}

.user-dropdown-item:hover {
    background: rgba(var(--shadow-color), 0.03);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-bg);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 16px;
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    padding: 32px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 10px 40px rgba(var(--shadow-color), 0.2);
}

.close-modal {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-lighter);
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-color);
}

.modal-content h2 {
    margin-bottom: 24px;
    color: var(--primary-color);
    text-align: center;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color-dark);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.auth-submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 8px;
}

.auth-submit-btn:hover {
    background: var(--text-muted);
}

.auth-switch {
    text-align: center;
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.auth-switch a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.auth-error {
    color: var(--error-color);
    background: var(--error-bg);
    padding: 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 16px;
    text-align: center;
}

/* Settings Page Specifics */
.settings-container {
    display: flex;
    justify-content: center;
    padding: 20px 0;
}

.settings-card {
    background: var(--bg-white);
    padding: 32px;
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 4px 15px rgba(var(--shadow-color), 0.05);
    border: 1px solid rgba(var(--glass-border-color), 0.04);
}

.settings-card h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.settings-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.settings-card small {
    display: block;
    margin-top: 6px;
    color: var(--text-lighter);
}

.teacher-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.teacher-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--header-background);
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-color);
    border: 1px solid var(--border-color-darkest);
}

.remove-teacher {
    background: none;
    border: none;
    font-size: 1.2rem;
    line-height: 1;
    color: var(--text-lighter);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
}

.remove-teacher:hover {
    color: var(--error-color);
}

/* Teacher Badges for Substitutions */
.teacher-badges {
    display: flex;
    gap: 4px;
    align-items: center;
    flex-wrap: nowrap;
}

.teacher-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    line-height: 1.2;
    white-space: nowrap;
}

.teacher-badge.present {
    background-color: var(--success-bg);
    color: var(--success-color);
}

.teacher-badge.absent {
    background-color: var(--error-bg);
    color: var(--error-color);
    text-decoration: line-through;
    text-decoration-thickness: 1.5px;
}

/* ─── data-theme dark mode support (for theme.js toggle) ─────────────────── */

html[data-theme="dark"] {
    --primary-color: #ededed;
    --background-color: #000000;
    --card-background: #111111;
    --header-background: #1a1a1a;
    --button-background: rgba(255, 255, 255, 0.05);
    --button-hover: rgba(255, 255, 255, 0.1);
    --table-row-even: #171717;
    --table-row-hover: rgba(255, 255, 255, 0.08);
    --table-gradient-start: #111111;
    --table-gradient-end: #171717;
    --text-color: #ededed;
    --text-muted: #a1a1aa;
    --text-light: #71717a;
    --text-lighter: #52525b;
    --text-lightest: #3f3f46;
    --border-color: #333333;
    --border-color-dark: #27272a;
    --border-color-darker: #3f3f46;
    --border-color-darkest: #52525b;
    --error-color: #ff7575;
    --error-bg: rgba(255, 75, 75, 0.15);
    --success-color: #61de7a;
    --success-bg: rgba(97, 222, 122, 0.15);
    --bg-white: #111111;
    --text-inverse: #000000;
    --shadow-color: 0, 0, 0;
    --glass-color: 30, 30, 30;
    --glass-mid-color: 20, 20, 20;
    --glass-border-color: 255, 255, 255;
    --overlay-bg: rgba(0, 0, 0, 0.8);
    --accent-color: #818cf8;
}

html[data-theme="dark"] .course-filter::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%23ededed' d='M7 10L2 5h10z'/%3E%3C/svg%3E");
}

html[data-theme="dark"] select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ededed'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
}

html[data-theme="dark"] .form-group input,
html[data-theme="dark"] select {
    color: var(--text-color) !important;
    background-color: var(--bg-white) !important;
}

html[data-theme="light"] {
    --accent-color: #6366f1;
}

:root {
    --accent-color: #6366f1;
}

/* ─── Theme Toggle Button ────────────────────────────────────────────────── */

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    width: 36px;
    height: 36px;
    position: relative;
}

.theme-toggle-btn:hover {
    background: var(--button-background);
}

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
}

.theme-toggle-btn::after {
    content: attr(data-label);
    position: absolute;
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-lighter);
    white-space: nowrap;
    pointer-events: none;
    letter-spacing: 0.02em;
}

/* ─── Tab Bar ────────────────────────────────────────────────────────────── */

.tab-bar {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: rgba(var(--glass-color), 0.5);
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    border-radius: 12px;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.tab-bar a {
    flex: 1;
    text-align: center;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s;
}

.tab-bar a:hover {
    background: rgba(var(--glass-color), 0.5);
    color: var(--text-color);
}

.tab-bar a.active {
    background: rgba(var(--glass-color), 0.7);
    color: var(--text-color);
    box-shadow: 0 1px 3px rgba(var(--shadow-color), 0.1);
}

/* ─── Toast Notification ─────────────────────────────────────────────────── */

#toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-background);
    color: var(--text-color);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.2);
    border: 1px solid rgba(var(--glass-border-color), 0.1);
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
    white-space: nowrap;
}

#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* ─── Generic .btn class ─────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--button-background);
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    gap: 6px;
    white-space: nowrap;
}

.btn:hover {
    background: var(--button-hover);
}

.btn-primary,
.sp-btn-apply {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.btn-primary:hover,
.sp-btn-apply:hover {
    background: color-mix(in srgb, var(--accent-color) 85%, black);
}

.sp-btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* ─── Tags for substitution detail ───────────────────────────────────────── */

.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.tag-cancel {
    background: var(--error-bg);
    color: var(--error-color);
    text-decoration: line-through;
}

.tag-subst {
    background: var(--success-bg);
    color: var(--success-color);
}

.tag-class {
    background: rgba(var(--shadow-color), 0.08);
    color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/* ─── Stundenplan (Schedule) CSS ─────────────────────────────────────────── */
/* ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Controls ───────────────────────────────────────────────────────────── */

.sp-btn-save {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.sp-btn-save:hover {
    background: color-mix(in srgb, var(--accent-color) 85%, black);
}

.sp-btn-clear {
    color: var(--error-color);
    border-color: var(--error-color);
}

.sp-btn-clear:hover {
    background: var(--error-bg);
}

.sp-btn-settings {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.15s;
}

.sp-btn-settings:hover {
    background: var(--button-background);
}

.sp-controls {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 24px;
    align-items: stretch;
    max-width: 100%;
}

@media screen and (min-width: 769px) {
    .sp-controls {
        flex-direction: row;
        gap: 32px;
        align-items: flex-start;
        justify-content: flex-start;
        margin-bottom: 32px;
        flex-wrap: wrap;
    }
}

.sp-autocomplete {
    position: relative;
    width: 100%;
}

.sp-autocomplete .sp-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(var(--shadow-color), 0.15);
    z-index: 100;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.sp-suggestion-item {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
    transition: background 0.1s;
}

.sp-suggestion-item:hover {
    background: rgba(var(--shadow-color), 0.06);
}

.sp-suggestion-new {
    color: var(--accent-color);
    font-weight: 600;
    border-top: 1px solid var(--border-color);
}

/* ─── Settings ───────────────────────────────────────────────────────────── */

.sp-settings-wrap {
    position: relative;
}

.sp-settings-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.15s;
}

.sp-settings-btn:hover {
    background: var(--button-background);
}

/* ─── Week tabs (A/B) ────────────────────────────────────────────────────── */

.sp-week-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    align-items: center;
}

.sp-week-btn {
    padding: 6px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--button-background);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-week-btn.active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.sp-kw-badge {
    display: inline-block;
    background: rgba(255, 255, 255, .2);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 4px;
}

.sp-week-copy-btn {
    margin-left: auto;
    padding: 4px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--button-background);
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.15s;
}

.sp-week-copy-btn:hover {
    background: var(--button-hover);
}

/* ─── Grid Table ─────────────────────────────────────────────────────────── */

.sp-grid-table {
    display: grid;
    grid-template-columns: 70px repeat(5, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.sp-grid-time-header,
.sp-grid-day-header {
    background: var(--header-background);
    padding: 10px 4px;
    text-align: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.sp-grid-day-header .sp-day-short {
    display: none;
}

.sp-grid-break-label {
    grid-column: 1 / -1;
    background: rgba(var(--glass-mid-color), 0.6);
    text-align: center;
    padding: 4px 8px;
    font-size: 0.8rem;
    color: var(--text-lighter);
    font-weight: 500;
}

.sp-grid-break-label span {
    font-weight: 400;
    opacity: 0.7;
}

.sp-grid-time {
    background: var(--bg-white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 4px;
    gap: 2px;
}

.sp-lesson-num {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-color);
}

.sp-lesson-time {
    font-size: 0.7rem;
    color: var(--text-lighter);
    text-align: center;
    line-height: 1.3;
}

/* ─── Grid Cells ─────────────────────────────────────────────────────────── */

.sp-grid-cell {
    background: var(--bg-white);
    padding: 6px;
    cursor: pointer;
    position: relative;
    min-height: 54px;
    transition: background 0.15s;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sp-grid-cell:hover {
    background: rgba(var(--glass-mid-color), 0.8);
}

.sp-cell-empty {
    display: flex;
    align-items: center;
    justify-content: center;
}

.sp-cell-add {
    font-size: 1.2rem;
    color: var(--text-lightest);
    font-weight: 300;
}

.sp-cell-subject {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-color);
    line-height: 1.2;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sp-cell-details {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.sp-cell-teacher,
.sp-cell-room {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(var(--shadow-color), 0.05);
    padding: 1px 5px;
    border-radius: 4px;
}

.sp-cell-doppel-badge {
    font-size: 0.65rem;
    color: var(--accent-color);
    margin-top: 2px;
    font-weight: 600;
}

.sp-cell-merge-start {
    grid-row: span 2;
}

/* ─── Substitution overlays on cells ─────────────────────────────────────── */

.sp-cell-has-sub {
    border-left: 3px solid #d97706 !important;
    background: rgba(217, 119, 6, 0.06) !important;
}

.sp-cell-has-cancel {
    border-left: 3px solid #ef4444 !important;
    background: rgba(239, 68, 68, 0.06) !important;
}

.sp-cell-overlay {
    background: rgba(var(--shadow-color), 0.04);
    border-radius: 4px;
    padding: 2px 5px;
    margin-top: 3px;
    font-size: 0.7rem;
    line-height: 1.3;
    display: flex;
    gap: 4px;
    align-items: center;
    flex-wrap: wrap;
}

.sp-cell-overlay-clickable {
    cursor: pointer;
    transition: background 0.15s;
}

.sp-cell-overlay-clickable:hover {
    background: rgba(var(--shadow-color), 0.1);
}

.sp-overlay-change {
    color: #d97706;
    font-weight: 600;
}

.sp-overlay-cancel {
    color: var(--error-color);
    font-weight: 600;
}

.sp-overlay-info {
    color: var(--text-muted);
}

.sp-overlay-room {
    color: var(--text-lighter);
    font-style: italic;
}

/* ─── Sub count banner ───────────────────────────────────────────────────── */

.sp-sub-banner {
    grid-column: 1 / -1;
    background: rgba(217, 119, 6, 0.08);
    color: #d97706;
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
}

/* ─── Grid empty state ───────────────────────────────────────────────────── */

.sp-grid-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.sp-grid-empty h3 {
    margin-bottom: 8px;
    color: var(--text-color);
}

/* ─── Modal overlays ─────────────────────────────────────────────────────── */

.sp-overlay,
.sp-edit-overlay,
.sp-load-overlay,
.sp-share-overlay,
.sp-teacher-overlay,
.sp-settings-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-bg);
    display: none;
    align-items: flex-start;
    justify-content: center;
    z-index: 5000;
    padding: 16px;
    overflow-y: auto;
}

.sp-account-overlay {
    z-index: 5100;
}

.sp-modal,
.sp-edit-modal,
.sp-load-modal,
.sp-share-modal,
.sp-teacher-modal,
.sp-account-modal {
    background: linear-gradient(135deg, rgba(var(--glass-color), 0.95) 0%, rgba(var(--glass-mid-color), 0.98) 50%, rgba(var(--glass-color), 0.95) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    padding: 24px;
    max-width: 420px;
    width: 100%;
    margin: auto;
    overflow: visible;
    box-shadow: 0 8px 32px rgba(var(--shadow-color), 0.25);
    border: 1px solid rgba(var(--glass-border-color), 0.08);
}

.sp-modal h3,
.sp-edit-modal h3,
.sp-load-modal h3,
.sp-share-modal h3,
.sp-teacher-modal h3,
.sp-account-modal h3 {
    margin-bottom: 20px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
}

.sp-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.sp-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
}

/* ─── Edit cell modal ────────────────────────────────────────────────────── */

.sp-edit-field {
    margin-bottom: 12px;
}

.sp-edit-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.sp-edit-field input[type="text"],
.sp-edit-field input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(var(--glass-border-color), 0.08);
    border-radius: 10px;
    background: rgba(var(--glass-color), 0.9);
    color: var(--primary-color);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(var(--shadow-color), 0.04), inset 0 1px 1px rgba(var(--glass-color), 0.9);
}

.sp-edit-field input[type="text"]:focus,
.sp-edit-field input[type="password"]:focus {
    border-color: rgba(var(--glass-border-color), 0.15);
    background: rgba(var(--glass-color), 1);
    box-shadow: 0 2px 8px rgba(var(--shadow-color), 0.12), 0 1px 2px rgba(var(--shadow-color), 0.08);
}

.sp-edit-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.sp-edit-actions .action-button {
    flex: 1;
    min-width: 0;
}

.sp-btn-apply {
    background: var(--accent-color) !important;
    color: #fff !important;
    border: 1px solid transparent !important;
}

.sp-btn-apply:hover {
    background: color-mix(in srgb, var(--accent-color) 85%, black) !important;
}

.sp-btn-clear,
.sp-btn-close-sub {
    color: var(--error-color);
}

.sp-double-check {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.sp-suggestions {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(var(--shadow-color), 0.15);
    z-index: 5100;
    max-height: 160px;
    overflow-y: auto;
    display: none;
}

/* ─── Load / Save modals ─────────────────────────────────────────────────── */

.sp-load-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.sp-load-item:hover {
    background: rgba(var(--shadow-color), 0.04);
}

.sp-load-item.active {
    border-color: var(--accent-color);
    background: rgba(99, 102, 241, 0.06);
}

.sp-load-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sp-load-item-info strong {
    font-size: 0.95rem;
    color: var(--text-color);
}

.sp-load-item-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.sp-load-delete {
    background: none;
    border: none;
    color: var(--text-lighter);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px 8px;
    transition: color 0.15s;
}

.sp-load-delete:hover {
    color: var(--error-color);
}

.sp-load-empty,
.sp-loading {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ─── Share modal ────────────────────────────────────────────────────────── */

.sp-share-code-display,
.sp-share-code {
    text-align: center;
    margin: 16px 0;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--accent-color);
}

.sp-share-code-display .sp-share-code-text {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--accent-color);
}

.sp-share-link-group,
.sp-share-link {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.sp-share-link-group input,
.sp-share-link input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    color: var(--text-color);
    font-size: 0.85rem;
}

.sp-share-copy-btn {
    padding: 8px 16px;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
}

.sp-share-copy-btn:hover {
    background: color-mix(in srgb, var(--accent-color) 85%, black);
}

.sp-share-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

/* Shared plan import section in load modal */

.sp-share-import {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.sp-share-import h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.sp-share-import-group {
    display: flex;
    gap: 8px;
}

.sp-share-import-group input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    color: var(--text-color);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ─── Substitution detail modal ──────────────────────────────────────────── */

.sp-sub-detail-modal {
    max-width: 420px;
    overflow: hidden;
}

.sp-sub-detail-modal #spSubDetailBody {
    overflow-x: hidden;
}

.sp-btn-close-sub {
    background: var(--error-bg);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.sp-btn-close-sub:hover {
    background: color-mix(in srgb, var(--error-color) 20%, transparent);
}

.sp-sub-detail-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: auto;
}

.sp-sub-detail-table th,
.sp-sub-detail-table td {
    padding: 6px 10px;
    text-align: left;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

.sp-sub-detail-table th {
    color: var(--text-muted);
    font-weight: 600;
    white-space: nowrap;
    width: 1%;
}

.sp-sub-detail-table td {
    color: var(--text-color);
    word-break: break-word;
}

/* ─── Account modal ──────────────────────────────────────────────────────── */

.sp-acc-tabs,
.sp-account-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    background: rgba(var(--shadow-color), 0.05);
    padding: 3px;
    border-radius: 8px;
}

.sp-acc-tab,
.sp-account-tab {
    flex: 1;
    padding: 8px;
    text-align: center;
    border: none;
    background: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
}

.sp-acc-tab.active,
.sp-account-tab.active {
    background: var(--bg-white);
    color: var(--text-color);
    box-shadow: 0 1px 3px rgba(var(--shadow-color), 0.1);
}

.sp-acc-field {
    margin-bottom: 12px;
}

.sp-acc-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.sp-acc-field input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    color: var(--text-color);
    font-size: 0.95rem;
    outline: none;
}

.sp-acc-field input:focus {
    border-color: var(--accent-color);
}

.sp-acc-forgot {
    text-align: center;
    margin-top: 8px;
}

.sp-acc-forgot a {
    font-size: 0.85rem;
    color: var(--accent-color);
    cursor: pointer;
    text-decoration: none;
}

.sp-acc-forgot-info {
    padding: 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ─── Account status (sidebar) ───────────────────────────────────────────── */

.sp-account-logged-in {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 0;
}

.sp-account-user {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sp-account-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.sp-account-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}

.sp-account-not-logged {
    padding: 8px 0;
}

.sp-account-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

/* ─── Settings panel ──────────────────────────────────────────────────────── */

.sp-settings-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.sp-settings-option {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px 0;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
}

.sp-settings-option small {
    display: block;
    color: var(--text-lighter);
    font-size: 0.8rem;
}

.sp-settings-divider {
    height: 1px;
    background: var(--border-color);
    margin: 10px 0;
}

/* ─── Checkbox / Doppelstunde ────────────────────────────────────────────── */

.sp-doppelstunde-field {
    padding: 8px 0 4px;
}

.sp-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
    user-select: none;
}

.sp-checkbox-label input[type="checkbox"] {
    -webkit-appearance: none;
    appearance: none;
    width: 44px;
    height: 24px;
    border: none;
    border-radius: 12px;
    background: var(--border-color-darker);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: background 0.3s ease;
}

.sp-checkbox-label input[type="checkbox"]::after {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: white;
    transition: transform 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.sp-checkbox-label input[type="checkbox"]:checked {
    background: var(--accent-color);
}

.sp-checkbox-label input[type="checkbox"]:checked::after {
    transform: translateX(20px);
}

.sp-checkbox-label input[type="checkbox"]:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ─── Account info & forgot PIN ──────────────────────────────────────────── */

.sp-account-info {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.5;
}

.sp-forgot-pin {
    text-align: center;
    margin-top: 12px;
}

.sp-link-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    padding: 4px;
}

.sp-link-btn:hover {
    text-decoration: underline;
}

.sp-forgot-info {
    text-align: center;
    padding: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.sp-forgot-info h4 {
    margin: 12px 0 8px;
    color: var(--text-color);
}

/* ─── Load modal share section ───────────────────────────────────────────── */

.sp-load-share {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.sp-load-share h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.sp-load-share input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    color: var(--text-color);
    font-size: 0.95rem;
    outline: none;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.sp-load-share input:focus {
    border-color: var(--accent-color);
}

/* ─── Mobile responsive: Stundenplan ─────────────────────────────────────── */

@media (max-width: 768px) {
    .sp-grid-table {
        grid-template-columns: 36px repeat(5, 1fr);
        font-size: 0.8rem;
    }

    .sp-grid-day-header .sp-day-full {
        display: none;
    }

    .sp-grid-day-header .sp-day-short {
        display: inline;
    }

    .sp-grid-cell {
        padding: 4px 3px;
        min-height: 44px;
    }

    .sp-cell-subject {
        font-size: 0.75rem;
    }

    .sp-cell-details {
        gap: 2px;
    }

    .sp-cell-teacher,
    .sp-cell-room {
        font-size: 0.65rem;
        padding: 0 3px;
    }

    .sp-cell-doppel-badge {
        font-size: 0.6rem;
    }

    .sp-lesson-num {
        font-size: 0.8rem;
    }

    .sp-lesson-time {
        display: none;
    }

    .sp-grid-time-header,
    .sp-grid-day-header {
        padding: 6px 2px;
        font-size: 0.75rem;
    }

    .sp-grid-break-label {
        padding: 2px 4px;
        font-size: 0.7rem;
    }

    .sp-cell-overlay {
        font-size: 0.6rem;
        padding: 1px 3px;
    }

    .sp-controls {
        gap: 6px;
        flex-direction: column;
        align-items: stretch;
    }

    .sp-week-tabs {
        flex-wrap: wrap;
    }

    .sp-week-btn {
        font-size: 0.8rem;
        padding: 5px 10px;
    }

    .sp-week-copy-btn {
        font-size: 0.7rem;
    }

    .sp-modal {
        padding: 16px;
        max-width: 95vw;
    }

    .tab-bar a {
        padding: 8px 8px;
        font-size: 0.85rem;
    }
}