/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background: #fff;
    color: #333;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
}

.nav-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-btn:hover {
    background: #f5f5f5;
}

.nav-btn:active {
    background: #e0e0e0;
}

.nav-btn svg {
    width: 24px;
    height: 24px;
    stroke: #555;
}

.nav-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

/* Main content area */
.main-content {
    padding-top: 56px;
    min-height: 100vh;
}

/* Lines container */
.lines-container {
    padding: 8px 0;
}

/* Individual line */
.line {
    padding: 10px 16px;
    cursor: pointer;
    transition: background 0.15s;
    border-bottom: 1px solid #f0f0f0;
}

.line:hover {
    background: #f9f9f9;
}

.line.selected {
    background: #e3f2fd;
}

.english {
    font-size: 16px;
    line-height: 1.5;
    color: inherit;
}

/* Translation card (expanded state) */
.translation-card {
    margin-top: 10px;
    padding: 12px 16px;
    background: #fff9e6;
    border-radius: 8px;
    border-left: 3px solid #ffc107;
    animation: slideDown 0.2s ease-out;
}

.meta-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid #ffe0b2;
}

.meta-timestamp {
    font-size: 11px;
    color: #999;
    font-family: monospace;
}

.meta-speaker {
    font-size: 11px;
    font-weight: 600;
    color: #666;
}

.translation-label {
    font-size: 10px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.chinese {
    font-size: 17px;
    line-height: 1.6;
    color: #333;
}

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

/* Side menu */
.side-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    z-index: 2000;
}

.side-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.side-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    max-width: 80vw;
    background: #fff;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
    z-index: 2001;
    display: flex;
    flex-direction: column;
}

.side-menu.active {
    transform: translateX(0);
}

.side-menu-header {
    height: 56px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #e0e0e0;
}

.side-menu-title {
    font-size: 18px;
    font-weight: 600;
}

.close-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.close-btn:hover {
    background: #f5f5f5;
}

.close-btn svg {
    width: 24px;
    height: 24px;
    stroke: #555;
}

.episode-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.episode-item {
    display: block;
    padding: 16px;
    text-decoration: none;
    color: #333;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.15s;
}

.episode-item:hover {
    background: #f5f5f5;
}

.episode-item.active {
    background: #e3f2fd;
    font-weight: 500;
}

.episode-id {
    font-size: 16px;
}

/* Empty state */
.empty-state {
    padding: 40px 16px;
    text-align: center;
    color: #999;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .line {
        padding: 12px 16px;
    }
    
    .english {
        font-size: 17px;
    }
    
    .chinese {
        font-size: 18px;
    }
}

/* Hide scrollbar but keep functionality */
.episode-list::-webkit-scrollbar {
    width: 6px;
}

.episode-list::-webkit-scrollbar-track {
    background: transparent;
}

.episode-list::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}