/* Theme Variables */
:root {
    /* Dark Theme (Default) */
    --bg-color: #000000;
    --text-color: #ffffff;
    --container-bg: rgba(30, 30, 30, 0.8);
    --table-header-bg: rgba(70, 70, 70, 0.8);
    --table-border: #444;
    --table-header-border: #555;
    --row-hover-bg: rgba(50, 50, 50, 0.5);
    --special-event-bg: rgba(100, 50, 150, 0.2);
    --special-event-hover: rgba(100, 50, 150, 0.3);
    --date-color: #e0e0e0;
    --leader-color: #b0b0b0;
    --topic-color: #d0d0d0;
    --empty-leader-color: #666;
    --select-bg: rgba(50, 50, 50, 0.8);
    --select-border: #666;
}

[data-theme="pink"] {
    --bg-color: #1a0d14;
    --text-color: #f8e8f0;
    --container-bg: rgba(60, 30, 45, 0.8);
    --table-header-bg: rgba(120, 60, 90, 0.8);
    --table-border: #8b4a6b;
    --table-header-border: #a55577;
    --row-hover-bg: rgba(80, 40, 60, 0.5);
    --special-event-bg: rgba(180, 100, 150, 0.3);
    --special-event-hover: rgba(180, 100, 150, 0.4);
    --date-color: #f0c8d8;
    --leader-color: #d8a8c0;
    --topic-color: #e8c8d8;
    --empty-leader-color: #996677;
    --select-bg: rgba(80, 40, 60, 0.8);
    --select-border: #a55577;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 48px;
    margin: 0;
    padding: 20px 0;
    color: var(--text-color);
    font-weight: 300;
}

.theme-switcher {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 14px;
}

.theme-label {
    color: var(--text-color);
    font-weight: 500;
    margin-right: 5px;
}

.theme-buttons {
    display: flex;
    gap: 8px;
    background-color: var(--container-bg);
    padding: 4px;
    border-radius: 12px;
    border: 1px solid var(--table-border);
}

.theme-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--leader-color);
    font-size: 13px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.theme-btn:hover {
    background-color: var(--row-hover-bg);
    transform: translateY(-1px);
}

.theme-btn.active {
    background-color: var(--special-event-bg);
    color: var(--text-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-btn.active[data-theme="dark"] {
    background: linear-gradient(135deg, rgba(100, 50, 150, 0.3), rgba(50, 50, 100, 0.3));
}

.theme-btn.active[data-theme="pink"] {
    background: linear-gradient(135deg, rgba(255, 192, 203, 0.3), rgba(219, 112, 147, 0.3));
}

.theme-icon {
    font-size: 16px;
    transition: transform 0.3s ease;
}

.theme-btn:hover .theme-icon {
    transform: scale(1.1);
}

.theme-btn.active .theme-icon {
    transform: scale(1.05);
}

.theme-name {
    font-family: inherit;
    letter-spacing: 0.5px;
}

.schedule-container {
    background-color: var(--container-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    overflow-x: auto;
    transition: background-color 0.3s ease;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
    font-size: 16px;
}

.schedule-table th {
    background-color: var(--table-header-bg);
    color: var(--text-color);
    padding: 16px 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 3px solid var(--table-header-border);
    position: sticky;
    top: 0;
    transition: background-color 0.3s ease;
}

.schedule-table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--table-border);
    vertical-align: top;
    transition: border-color 0.3s ease;
}

.schedule-table tr:hover {
    background-color: var(--row-hover-bg);
    transition: background-color 0.2s ease;
}

.special-event {
    background-color: var(--special-event-bg);
    transition: background-color 0.3s ease;
}

.special-event:hover {
    background-color: var(--special-event-hover);
}

.date-cell {
    font-weight: 600;
    color: var(--date-color);
    min-width: 120px;
    transition: color 0.3s ease;
}

.leader-cell {
    color: var(--leader-color);
    min-width: 140px;
    transition: color 0.3s ease;
}

.topic-cell {
    color: var(--topic-color);
    max-width: 400px;
    word-wrap: break-word;
    transition: color 0.3s ease;
}

/* Special styling for empty leader cells */
.leader-cell:contains("-") {
    color: #666;
    font-style: italic;
}

/* Remove old select styles */
.theme-switcher select {
    display: none;
}

.desktop-only {
    display: flex;
}

.mobile-only {
    display: none;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 10px 5px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: flex;
        justify-content: center;
        margin-top: 20px;
        padding: 15px 0;
        border-top: 1px solid var(--table-border);
    }
    
    h1 {
        font-size: 28px;
        padding: 10px 0;
    }
    
    .theme-switcher {
        justify-content: center;
    }
    
    .theme-buttons {
        background-color: var(--container-bg);
    }
    
    .schedule-container {
        padding: 15px 10px;
        margin: 0;
        border-radius: 8px;
    }
    
    .schedule-table {
        font-size: 13px;
        width: 100%;
        min-width: 100%;
    }
    
    .schedule-table th,
    .schedule-table td {
        padding: 8px 6px;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .date-cell,
    .leader-cell {
        min-width: auto;
        font-size: 12px;
    }
    
    .date-cell {
        width: 20%;
        font-size: 11px;
        font-weight: 700;
    }
    
    .leader-cell {
        width: 18%;
        font-size: 10px;
    }
    
    .topic-cell {
        width: 44%;
        font-size: 12px;
        line-height: 1.3;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 8px 3px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .schedule-container {
        padding: 12px 5px;
        border-radius: 6px;
    }
    
    .schedule-table {
        font-size: 11px;
    }
    
    .schedule-table th,
    .schedule-table td {
        padding: 6px 4px;
    }
    
    /* Stack layout for very small screens */
    .schedule-table th:nth-child(2),
    .schedule-table td:nth-child(2),
    .schedule-table th:nth-child(3),
    .schedule-table td:nth-child(3) {
        display: none;
    }
    
    .date-cell {
        width: 30%;
        font-size: 12px;
    }
    
    .topic-cell {
        width: 70%;
        font-size: 11px;
        position: relative;
    }
    
    .topic-cell::before {
        content: attr(data-leaders);
        display: block;
        font-size: 9px;
        color: var(--empty-leader-color);
        margin-bottom: 3px;
        font-style: italic;
    }
}

@media (max-width: 480px) {
    .mobile-only .theme-switcher {
        flex-direction: row;
        gap: 8px;
    }
    
    .mobile-only .theme-label {
        margin-right: 0;
        font-size: 12px;
    }
    
    .mobile-only .theme-btn .theme-name {
        display: none;
    }
    
    .mobile-only .theme-btn {
        padding: 8px;
        min-width: 40px;
        justify-content: center;
    }
    
    .mobile-only .theme-icon {
        font-size: 16px;
    }
    
    .schedule-container {
        padding: 10px 3px;
    }
    
    .schedule-table {
        font-size: 10px;
    }
    
    .schedule-table th,
    .schedule-table td {
        padding: 5px 3px;
    }
    
    .date-cell {
        font-size: 11px;
    }
    
    .topic-cell {
        font-size: 10px;
        line-height: 1.2;
    }
}