@import url('https://fonts.googleapis.com/css2?family=Public+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500&display=swap');

:root {
    /* Professional Clean Palette (Corporate Style) */
    --bg-main: #f8fafc;
    --bg-white: #ffffff;
    --sidebar-bg: #0f172a;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --white: #ffffff;

    --brand-primary: #2563eb;
    --brand-hover: #1d4ed8;

    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    --radius: 8px;
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Public Sans', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
}

/* Sidebar Navigation */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    color: var(--white);
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    padding: 0 0.5rem;
}

.sidebar-logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.tab-button {
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    color: #94a3b8;
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tab-button:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
}

.tab-button.active {
    background: var(--brand-primary);
    color: var(--white);
}

.user-profile {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-top: auto;
}

.username {
    display: block;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.logout-link {
    color: #fca5a5;
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    cursor: pointer;
}

/* Main Content Area */
.main-wrapper {
    flex: 1;
    margin-left: 280px;
    padding: 3rem 4rem;
    max-width: 100vw;
}

.page-header {
    margin-bottom: 3rem;
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: #0f172a;
}

.page-header p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Tab Navigation Visibility */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Content Card */
.content-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 3rem;
    box-shadow: var(--shadow-sm);
}

/* Professional Upload Area */
.upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius);
    padding: 4rem;
    text-align: center;
    cursor: pointer;
    background: #fcfcfd;
    transition: var(--transition);
}

.upload-area:hover {
    border-color: var(--brand-primary);
    background: #eff6ff;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-subtext {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* Buttons */
.btn-primary {
    background: var(--sidebar-bg);
    color: var(--white);
    border: none;
    padding: 1rem 2.5rem;
    font-weight: 700;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 2rem;
    width: 100%;
    font-size: 1rem;
}

.btn-primary:hover:not(:disabled) {
    background: #1e293b;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Result Visualization */
.result-section {
    margin-top: 2rem;
    display: block;
    /* Already handled by placeholder injection */
    animation: slideUp 0.3s ease-out;
}

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

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

.verdict-box {
    padding: 2rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    border-left: 6px solid transparent;
}

.verdict-box.fake {
    background: #fef2f2;
    color: #991b1b;
    border-color: #ef4444;
}

.verdict-box.real {
    background: #f0fdf4;
    color: #166534;
    border-color: #10b981;
}

.verdict-title {
    font-size: 1.5rem;
    font-weight: 800;
}

/* Progress Tracker */
.analysis-progress {
    margin: 2rem 0;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.progress-bar-bg {
    height: 12px;
    background: #e2e8f0;
    border-radius: 100px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    transition: width 1s ease;
}

.fill-danger {
    background: var(--danger);
}

.fill-success {
    background: var(--success);
}

/* Grid Details */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.metric-card {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.metric-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

/* History Archives */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.history-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    border-radius: var(--radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.history-card:hover {
    border-color: #cbd5e1;
}

.history-info h4 {
    font-weight: 700;
    color: #334155;
}

.history-meta {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-top: 0.25rem;
}

.history-verdict {
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 800;
}

/* Previews - CENTERED */
.preview-container {
    margin: 2rem auto;
    display: none;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    max-width: 600px;
    background: #000;
}

.preview-container img,
.preview-container video,
.preview-container audio {
    width: 100%;
    display: block;
}

.result-placeholder {
    margin-top: 2rem;
    width: 100%;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
        padding: 2rem 1rem;
    }

    .sidebar-logo h1,
    .username,
    .logout-link,
    .nav-text {
        display: none;
    }

    .main-wrapper {
        margin-left: 80px;
        padding: 2rem;
    }

    .tab-button {
        justify-content: center;
        padding: 1rem;
    }
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e2e8f0;
    border-top: 3px solid var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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