:root {
    --bg-color: #f3f4f6;
    --sidebar-bg: #1f2937;
    --sidebar-text: #e5e7eb;
    --primary-color: #ef4444;
    /* YouTube Red */
    --accent-color: #3b82f6;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-sub: #6b7280;
    --border-color: #e5e7eb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    overflow: hidden;
}

/* Sidebar */
aside {
    width: 300px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 20px;
    flex-shrink: 0;
    box-shadow: 4px 0 6px rgba(0, 0, 0, 0.1);
}

aside h1 {
    font-size: 1.2rem;
    margin-bottom: 30px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: #9ca3af;
}

.input-group input {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #374151;
    background-color: #111827;
    color: #fff;
    font-size: 0.9rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-save {
    background-color: #374151;
    color: #fff;
    border: none;
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    width: 100%;
}

.btn-save:hover {
    background-color: #4b5563;
}

/* Main Content */
main {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Search Area */
.search-area {
    display: flex;
    gap: 10px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.search-area input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.btn-search {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 25px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
}

.btn-search:hover {
    background-color: #dc2626;
}

.btn-search:disabled {
    background-color: #fca5a5;
    cursor: not-allowed;
}

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--accent-color);
}

.stat-card h3 {
    font-size: 0.85rem;
    color: var(--text-sub);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.stat-card .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.stat-card .sub-text {
    font-size: 0.8rem;
    margin-top: 5px;
    color: var(--text-sub);
}

/* AI Report */
.ai-section {
    background: linear-gradient(135deg, #fff 0%, #f0fdf4 100%);
    border: 1px solid #bbf7d0;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    display: none;
    /* Hidden by default */
}

.ai-section.visible {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

.ai-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: #166534;
}

.ai-content {
    line-height: 1.6;
    white-space: pre-line;
    font-size: 0.95rem;
    color: #14532d;
    background: rgba(255, 255, 255, 0.6);
    padding: 15px;
    border-radius: 8px;
}

/* Tags */
.tags-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.tag {
    background-color: #eff6ff;
    color: #1e40af;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Data Table */
.table-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th,
td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f9fafb;
    font-weight: 600;
    color: var(--text-sub);
}

td img {
    width: 80px;
    height: 45px;
    object-fit: cover;
    border-radius: 4px;
}

.video-title {
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-name {
    font-size: 0.8rem;
    color: var(--text-sub);
}

/* Loader */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e5e7eb;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: 15px;
    font-weight: 600;
    color: var(--text-main);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Initial State Helper */
.hidden-section {
    display: none;
}