/* PaedKon - Pädagogische Konferenzplanung */

:root {
    --color-bg: #f8f9fa;
    --color-surface: #fff;
    --color-border: #dee2e6;
    --color-primary: #0d6efd;
    --color-primary-hover: #0b5ed7;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-error: #dc3545;
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}

.header {
    background: var(--color-surface);
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
}

.header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Upload */
.upload-section {
    background: var(--color-surface);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.upload-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.upload-label:hover {
    border-color: var(--color-primary);
    background: rgba(13, 110, 253, 0.05);
}

.upload-label input {
    display: none;
}

.upload-icon {
    font-size: 1.5rem;
}

.upload-hint {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.upload-file-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    font-size: 0.95rem;
}

.upload-file-status .file-status-text {
    color: var(--color-text-muted);
}

.error {
    color: var(--color-error);
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-primary:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
}

.referendars-section {
    margin-bottom: 1.5rem;
}

.referendars-section h3 {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.referendars-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.referendar-check {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.5rem;
    background: var(--color-bg);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.referendar-check:hover {
    background: #e9ecef;
}

.referendars-manual {
    margin-bottom: 1rem;
}

.referendars-row {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.referendars-input {
    width: 50%;
    flex-shrink: 0;
    padding: 0.5rem;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.referendars-hint {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.referendars-current {
    margin: 0.75rem 0 0;
    font-size: 0.9rem;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.file-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.file-status-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    background: #198754;
    color: #fff;
    border-radius: 50%;
    font-size: 0.9rem;
    font-weight: bold;
}

.file-status-text {
    color: var(--color-text-muted);
}

/* Filter */
.filter-section {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.filter-section h2 {
    margin: 0 0 1rem;
    font-size: 1.1rem;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.filter-group,
.filter-group-subjects,
.filter-group-classes {
    grid-column: 1 / -1;
}

.filter-group h3 {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.filter-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    max-height: 180px;
    overflow-y: auto;
}

.filter-checkboxes label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.5rem;
    background: var(--color-bg);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

.filter-checkboxes label:hover {
    background: #e9ecef;
}

.filter-checkboxes input {
    margin: 0;
}

/* Dual-List Fächer */
.dual-list-container {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.dual-list-panel {
    flex: 1;
    min-width: 180px;
}

.dual-list-panel h4 {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.dual-list-panel select {
    width: 100%;
    min-height: 200px;
    padding: 0.5rem;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.dual-list-panel select option {
    padding: 0.25rem 0;
}

.dual-list-buttons {
    margin-top: 0.5rem;
}

.dual-list-buttons button {
    padding: 0.35rem 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    cursor: pointer;
}

.dual-list-buttons button:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-text-muted);
}

.tab-btn:hover {
    color: var(--color-text);
}

.tab-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.tab-content {
    display: none;
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.tab-content.active {
    display: block;
}

/* Classes Accordion */
.classes-accordion {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.class-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    cursor: pointer;
    font-weight: 600;
}

.class-header:hover {
    background: #e9ecef;
}

.class-body {
    padding: 1rem;
    border-top: 1px solid var(--color-border);
}

.class-body.collapsed {
    display: none;
}

.class-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .class-grid {
        grid-template-columns: 1fr;
    }
}

.class-subjects h4, .class-collegium h4 {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.subject-list, .collegium-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.subject-item, .collegium-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.5rem;
    background: var(--color-bg);
    border-radius: 4px;
    font-size: 0.85rem;
}

.subject-item.excluded {
    opacity: 0.5;
    text-decoration: line-through;
}

.collegium-item-inactive {
    opacity: 0.5;
    color: var(--color-text-muted);
}

.collegium-badge {
    font-weight: 500;
}

/* Conference Settings */
.conference-settings {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--color-bg);
    border-radius: var(--radius);
}

.conference-settings h3 {
    margin: 0 0 1rem;
    font-size: 1rem;
}

.conference-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.setting-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.setting-group input {
    padding: 0.5rem;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

/* Conference Schedule */
#btn-create-schedule {
    margin-bottom: 1rem;
}

.schedule-progress {
    display: none;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.schedule-progress.visible {
    display: block;
}

.schedule-progress-bar {
    height: 8px;
    background: var(--color-bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.schedule-progress-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: 30%;
    background: var(--color-primary);
    border-radius: 4px;
    animation: schedule-progress-indeterminate 1.2s ease-in-out infinite;
}

@keyframes schedule-progress-indeterminate {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

.schedule-progress-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.conference-schedule {
    margin-top: 1rem;
}

.schedule-download-area {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.schedule-table th,
.schedule-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.schedule-table th {
    background: var(--color-bg);
    font-weight: 600;
    font-size: 0.9rem;
}

.schedule-table td {
    font-size: 0.9rem;
}

.schedule-slot-cell {
    position: relative;
    vertical-align: top;
}

.schedule-slot-time {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0.4rem;
}

.schedule-slot-time.schedule-time-trigger {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.schedule-slot-time.schedule-time-trigger:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.schedule-time-popup {
    display: none;
    position: absolute;
    left: 0;
    top: 100%;
    margin-top: 0.25rem;
    min-width: 260px;
    max-width: 90vw;
    max-height: 70vh;
    overflow-y: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    padding: 1rem;
}

.schedule-time-popup.visible {
    display: block;
}

.schedule-popup-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.schedule-popup-table th,
.schedule-popup-table td {
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--color-border);
    text-align: left;
}

.schedule-popup-table th {
    background: var(--color-bg);
    font-weight: 600;
}

.schedule-popup-teacher {
    font-weight: 500;
}

.schedule-popup-empty {
    color: var(--color-text-muted);
}

.schedule-slot-cell {
    padding: 0.5rem;
    vertical-align: top;
}

.schedule-slot-content.schedule-slot-classes-only {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.schedule-class-tag {
    position: relative;
    display: inline-block;
    padding: 0.3rem 0.6rem;
    background: linear-gradient(135deg, #e8f4fd 0%, #d6ebf9 100%);
    border: 1px solid rgba(13, 110, 253, 0.25);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: help;
}

.schedule-class-tag:hover {
    border-color: var(--color-primary);
}

.schedule-table .class-tag {
    padding: 0.2rem 0.5rem;
    background: #e7f1ff;
    border-radius: 4px;
    font-size: 0.85rem;
}

.schedule-table-twodays th {
    white-space: nowrap;
}

.schedule-empty {
    color: var(--color-text-muted);
    font-style: italic;
}

.schedule-fallback-note {
    margin: 0 0 1rem;
    padding: 0.5rem 0.75rem;
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: #856404;
}

.schedule-exclusions {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.schedule-exclusions h4 {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.schedule-exclusions-list {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
}

.schedule-exclusions-list:last-child {
    margin-bottom: 0;
}