:root {
    --primary-color: #007aff;
    --primary-dark: #0062cc;
    --secondary-color: #5ac8fa;
    --text-color: #333;
    --light-text: #666;
    --lighter-text: #999;
    --border-color: #e1e1e1;
    --bg-color: #f5f5f7;
    --bg-gradient-start: #6a7bff;
    --bg-gradient-end: #a5b4ff;
    --card-bg: #ffffff;
    --error-color: #ff3b30;
    --success-color: #34c759;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --empty-bg: #f8f8f8;
}

.dark-theme {
    --primary-color: #0a84ff;
    --primary-dark: #0070e0;
    --text-color: #f5f5f7;
    --light-text: #d1d5db;
    --lighter-text: #a1a1aa;
    --border-color: #444;
    --bg-color: #1c1c1e;
    --bg-gradient-start: #2d3154;
    --bg-gradient-end: #1c1c2e;
    --card-bg: #2c2c2e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --empty-bg: #2a2a2c;
}

/* 暗色主题下的透明效果 */
.dark-theme .input-container {
    background-color: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark-theme .player-container {
    background-color: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark-theme .tips {
    background-color: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark-theme #videoUrl {
    background-color: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark-theme #routeSelect {
    background-color: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark-theme .modal {
    background: rgba(44, 44, 46, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark-theme .modal input {
    background: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#bgLayer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 1;
    filter: none;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

header {
    text-align: center;
    margin-bottom: 10px;
    position: relative;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: linear-gradient(180deg, #f9fafb, #f3f4f6);
    border: 1px solid var(--border-color);
    font-size: 18px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-color);
    box-shadow: 0 4px 12px rgba(0,0,0,.06);
}

.auth-button {
    right: 52px;
    background: linear-gradient(180deg, #fff7ed, #ffedd5);
    border-color: #fdba74;
}
.auth-button:hover { filter: brightness(1.02); }

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

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    fill: var(--primary-color);
}

h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
}

.subtitle {
    font-size: 16px;
    color: var(--light-text);
    margin-bottom: 10px;
}

.input-container {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.url-input-wrapper {
    position: relative;
    margin-bottom: 16px;
    display: flex;
}

#videoUrl {
    flex: 1;
    padding: 14px 40px 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    backdrop-filter: blur(10px);
}

#videoUrl:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

.clear-btn {
    position: absolute;
    right: 120px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--lighter-text);
    font-size: 20px;
    cursor: pointer;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 2;
}

.clear-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--light-text);
}

.parse-btn-inline {
    padding: 0 24px;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: .3px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 110px;
    box-shadow: 0 8px 18px rgba(0,122,255,.22);
}

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

.parse-btn-inline:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.controls {
    display: flex;
    gap: 12px;
}

.select-wrapper {
    position: relative;
    flex: 1;
}

#routeSelect {
    width: 100%;
    padding: 12px 16px;
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

#routeSelect:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

/* 美化选择框 */
.route-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.route-option {
    flex: 1;
    min-width: calc(33.333% - 8px);
    padding: 14px 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    box-shadow: 0 6px 16px rgba(0,0,0,.06);
    backdrop-filter: blur(10px);
}

/* 夜间模式下提高线路项对比度与可读性 */
.dark-theme .route-option {
    background: rgba(44, 44, 46, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #e5e7eb;
}
.dark-theme .route-option:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #7b7b7b;
}
.dark-theme .route-option.active {
    background: linear-gradient(180deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
    color: #ffffff;
    text-shadow: 0 1px 0 rgba(0,0,0,.25);
}

.route-option:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 122, 255, 0.05);
}

.route-option.active {
    background: linear-gradient(180deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 10px 22px rgba(0,122,255,.28);
}

.select-arrow {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    fill: var(--light-text);
    pointer-events: none;
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

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

.player-container {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
    aspect-ratio: 16 / 9;
    width: 100%;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.empty-state {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--empty-bg);
    color: var(--light-text);
    z-index: 1;
    transition: background-color 0.3s ease;
}

.empty-icon {
    width: 64px;
    height: 64px;
    fill: var(--lighter-text);
    margin-bottom: 16px;
}

#videoFrame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: none;
}

.error-msg {
    background-color: var(--error-color);
    color: white;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    animation: fadeIn 0.3s ease;
    text-align: center;
}

.success-msg {
    background-color: var(--success-color);
    color: white;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    animation: fadeIn 0.3s ease;
    text-align: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tips {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tips h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-color);
}

.tips ul {
    padding-left: 20px;
}

.tips li {
    margin-bottom: 8px;
    color: var(--light-text);
}

footer {
    text-align: center;
    margin-top: 20px;
    padding: 20px 0;
    color: var(--lighter-text);
    font-size: 14px;
}

/* 授权弹窗 */
.modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-color);
    width: 90%;
    max-width: 380px;
    border-radius: 16px;
    padding: 18px 16px;
    box-shadow: 0 18px 40px rgba(0,0,0,.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(20px);
}
.modal-auth { text-align:center; padding-top:24px; }
.modal-auth h3 { margin-top:6px; margin-bottom:10px; }
.modal-icon { font-size:28px; }
.auth-info-row { display:flex; justify-content:space-between; align-items:center; gap:12px; margin:10px 0; padding:10px 12px; background: rgba(0,0,0,0.03); border-radius:12px; }
.auth-info-row .k { color: var(--light-text); }
.auth-info-row .v { color: var(--text-color); font-weight:600; }
.btn-primary { background: linear-gradient(180deg, var(--primary-color), var(--primary-dark)); color:#fff; border:none; border-radius:12px; padding:12px 18px; cursor:pointer; box-shadow:0 8px 18px rgba(0,122,255,.22); font-weight:700; }
.btn-secondary { background:#e5e7eb; color:#374151; border:none; border-radius:12px; padding:12px 18px; cursor:pointer; font-weight:700; }
.modal-actions { display:flex; gap:10px; justify-content:center; margin-top:12px; }
.modal h3 { margin-bottom: 12px; }
.modal input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    backdrop-filter: blur(10px);
}
.modal-actions { display:flex; gap:8px; margin-top:12px; }
.modal-actions .secondary { background:#e5e5ea; color:#333; }
.modal-tip { margin-top:8px; font-size:12px; color: var(--lighter-text); }

@media (max-width: 768px) {
    body {
        padding: 16px;
    }
    
    .url-input-wrapper {
        flex-direction: column;
    }
    
    #videoUrl {
        border-radius: var(--radius-sm);
        margin-bottom: 8px;
    }
    
    .clear-btn {
        right: 12px;
    }
    
    .parse-btn-inline {
        border-radius: var(--radius-sm);
    }
    
    .route-option {
        min-width: calc(50% - 4px);
    }
    
    .fullscreen-btn {
        width: 32px;
        height: 32px;
    }
    
    .fullscreen-btn svg {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    .route-option {
        min-width: 100%;
    }
}

/* 播放器控制区域 */
.player-container {
    position: relative;
}

.player-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.player-container:hover .player-controls {
    opacity: 1;
}

.fullscreen-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.fullscreen-btn:hover {
    background-color: rgba(0, 0, 0, 0.7);
    transform: scale(1.1);
}

.fullscreen-btn svg {
    width: 20px;
    height: 20px;
    fill: white;
}

/* 全屏模式样式 */
.player-container:fullscreen {
    width: 100%;
    height: 100%;
    background-color: black;
    padding: 0;
    margin: 0;
}

.player-container:fullscreen iframe {
    width: 100%;
    height: 100%;
}

/* 兼容不同浏览器的全屏样式 */
.player-container:-webkit-full-screen {
    width: 100%;
    height: 100%;
    background-color: black;
    padding: 0;
    margin: 0;
}

.player-container:-moz-full-screen {
    width: 100%;
    height: 100%;
    background-color: black;
    padding: 0;
    margin: 0;
}

.player-container:-ms-fullscreen {
    width: 100%;
    height: 100%;
    background-color: black;
    padding: 0;
    margin: 0;
}

/* 全屏模式下的控制按钮样式 */
.player-container:fullscreen .player-controls,
.player-container:-webkit-full-screen .player-controls,
.player-container:-moz-full-screen .player-controls,
.player-container:-ms-fullscreen .player-controls {
    top: 20px;
    right: 20px;
}