/* ================= 基礎變數 (粉色默認) ================= */
:root {
    --bg-color: #fdf2f8;
    --bg-pattern: radial-gradient(#fbcfe8 1px, transparent 1px);
    --card-bg: #ffffff;
    --text-main: #4a4a4a;
    --text-secondary: #888888;
    --accent-color: #d6336c;
    --accent-light: #fff0f5;
    --header-gradient: linear-gradient(135deg, #ffd1dc 0%, #ffe4e1 100%);
    --header-text: #d6336c;
    --border-color: #f0f0f0;
    --btn-shadow: 0 5px 15px rgba(255, 182, 193, 0.4);
}

/* 風格一：靜謐深藍 */
body.theme-blue {
    --bg-color: #f0f9ff; --bg-pattern: radial-gradient(#bae6fd 1px, transparent 1px);
    --card-bg: #ffffff; --text-main: #0f172a; --text-secondary: #64748b;
    --accent-color: #2563eb; --accent-light: #eff6ff;
    --header-gradient: linear-gradient(135deg, #93c5fd 0%, #dbeafe 100%);
    --header-text: #1e40af; --border-color: #e2e8f0;
    --btn-shadow: 0 5px 15px rgba(147, 197, 253, 0.4);
}

/* 風格二：慶典金色 */
body.theme-gold {
    --bg-color: #fffbeb; --bg-pattern: radial-gradient(#fde68a 1px, transparent 1px);
    --card-bg: #ffffff; --text-main: #451a03; --text-secondary: #92400e;
    --accent-color: #b45309; --accent-light: #fef3c7;
    --header-gradient: linear-gradient(135deg, #fcd34d 0%, #fde68a 100%);
    --header-text: #78350f; --border-color: #f59e0b;
    --btn-shadow: 0 5px 15px rgba(251, 191, 36, 0.4);
}

/* 風格三：深夜暗黑 */
body.theme-dark {
    --bg-color: #111827; --bg-pattern: radial-gradient(#374151 1px, transparent 1px);
    --card-bg: #1f2937; --text-main: #f3f4f6; --text-secondary: #9ca3af;
    --accent-color: #fbbf24; --accent-light: #374151;
    --header-gradient: linear-gradient(135deg, #374151 0%, #1f2937 100%);
    --header-text: #fbbf24; --border-color: #374151;
    --btn-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

/* ================= 全局樣式 ================= */
body {
    font-family: "Microsoft JhengHei", "Heiti TC", sans-serif;
    background-color: var(--bg-color);
    background-image: var(--bg-pattern);
    background-size: 20px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    color: var(--text-main);
    transition: all 0.5s ease;
}

.container {
    background: var(--card-bg);
    width: 100%;
    max-width: 960px;
    border-radius: 20px;
    box-shadow: var(--btn-shadow);
    overflow: hidden;
    border: 4px solid var(--card-bg);
    position: relative;
    transition: all 0.5s ease;
    min-height: 80vh;
}

/* ================= 頂部控制區 (左音樂 右主題) ================= */
.top-controls {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    flex-direction: row;
    justify-content: space-between; /* 關鍵：兩端對齊 */
    align-items: center;
    gap: 10px;
    z-index: 10;
}

/* 主題切換按鈕組 */
.theme-switcher {
    display: flex;
    gap: 8px;
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 2px solid rgba(255,255,255,0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    color: var(--text-secondary);
    outline: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.theme-btn i { font-size: 20px; }

.theme-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    color: var(--accent-color);
}

.theme-btn.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--accent-light);
    transform: scale(1.05);
}

/* 音樂控制條 */
.music-controls {
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    backdrop-filter: blur(5px);
}

.music-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.play-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--accent-color);
    color: white;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.play-btn i { font-size: 18px; }

.volume-wrapper {
    display: flex;
    align-items: center;
    gap: 5px;
}

input[type=range] {
    width: 60px;
    cursor: pointer;
}

/* ================= 內容表格樣式 ================= */
.header {
    background: var(--header-gradient);
    padding: 40px 20px 30px 20px;
    text-align: center;
    border-bottom: 3px dashed var(--accent-color);
}

.header h1 {
    margin: 0;
    color: var(--header-text);
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

table { width: 100%; border-collapse: collapse; margin: 0; }
th, td { padding: 15px; text-align: left; border-bottom: 1px solid var(--border-color); }

thead tr {
    background-color: var(--accent-light);
    color: var(--header-text);
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

tbody tr:hover { background-color: var(--accent-light); transition: background-color 0.3s; }

.col-time { width: 15%; font-weight: bold; color: var(--accent-color); font-family: monospace; font-size: 1.1em;}
.col-duration { width: 10%; text-align: center; color: var(--text-secondary); font-size: 0.9em;}
.col-name { width: 20%; font-weight: bold; color: var(--text-main);}
.col-content { width: 55%; color: var(--text-secondary); line-height: 1.6;}

.note {
    font-size: 0.85em;
    color: var(--text-secondary);
    background: var(--accent-light);
    padding: 5px;
    border-radius: 5px;
    display: inline-block;
    margin-top: 5px;
    border: 1px solid var(--border-color);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.cake-emoji {
    font-size: 2.5rem;
    animation: bounce 2s infinite;
}

/* ================= 響應式適配 (800px) ================= */
@media (max-width: 800px) {
    .header { padding-top: 100px; }
    .top-controls {
        top: 10px;
        left: 15px;
        right: 15px;
        gap: 8px;
    }
    th, td { padding: 10px; font-size: 0.9rem; }
    .header h1 { font-size: 1.5rem; flex-direction: column; }
    .col-duration { display: none; }
    
    .music-controls {
        background: rgba(255, 255, 255, 0.85);
        padding: 6px 10px;
    }
    .volume-wrapper { display: none; }

    .theme-switcher { gap: 4px; }
    .theme-btn {
        width: 34px;
        height: 34px;
    }
    .theme-btn i { font-size: 16px; }
}

/* ================= 沉浸式遮罩層 ================= */
#welcome-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-color);
    background-image: var(--bg-pattern);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    pointer-events: auto;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#welcome-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    animation: floatUp 0.8s ease-out;
}

.overlay-emoji {
    font-size: 4rem;
    animation: bounce 2s infinite;
    margin-bottom: 10px;
}

.overlay-content h2 {
    color: var(--header-text);
    font-size: 1.8rem;
    margin: 0 0 10px 0;
}

.overlay-hint {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 25px;
}

.enter-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: transform 0.2s, box-shadow 0.2s;
}

.enter-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.enter-btn i { font-size: 1.2rem; }

@keyframes floatUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@media (max-width: 600px) {
    .overlay-content h2 { font-size: 1.4rem; }
    .overlay-emoji { font-size: 3rem; }
}