/* ===== CSS Variables & Design System - Shadcn Inspired ===== */
:root {
    /* Monochrome Colors */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-card: rgba(18, 18, 18, 0.8);
    --bg-hover: rgba(255, 255, 255, 0.05);

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --accent: #ffffff;
    --accent-muted: rgba(255, 255, 255, 0.1);

    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);

    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(255, 255, 255, 0.05);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Subtle Grid Background ===== */
.app {
    position: relative;
    min-height: 100vh;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 50% 0%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

/* ===== Layout & Sidebar ===== */
.content-wrapper {
    display: flex;
    gap: var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    min-height: 100vh;
}

.analysis-section {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    transition: all var(--transition-base);
}

.analysis-section.with-sidebar {
    margin: 0;
}

/* Sidebar */
.search-sidebar {
    width: 360px;
    height: calc(100vh - 100px);
    position: sticky;
    top: 90px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(20px);
        opacity: 0;
    }

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

.sidebar-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
}

.close-sidebar {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    /* Hide scrollbar */
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE/Edge */
}

.sidebar-content::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

.sidebar-section {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

/* Sidebar Search Results */
.sidebar-result {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.sidebar-result:hover {
    background: var(--bg-hover);
}

.result-source {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.result-favicon {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.result-source-name {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.result-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-left: auto;
}

.result-title {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 600;
    text-decoration: none;
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.result-title:hover {
    color: var(--accent);
    text-decoration: underline;
}

.result-snippet {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Responsive Sidebar */
@media (max-width: 1100px) {
    .content-wrapper {
        flex-direction: column;
        padding-top: 80px;
    }

    .search-sidebar {
        /* Tablet behavior: Stacked */
        width: 100%;
        height: auto;
        max-height: 500px;
        position: sticky;
        top: 90px;
        margin-top: var(--space-lg);
    }
}

/* Mobile Sidebar: Overlay Drawer */
@media (max-width: 768px) {
    .search-sidebar {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: auto;
        width: 85%;
        max-width: 400px;
        height: 100vh;
        max-height: none;
        margin: 0;
        border-radius: 0;
        border: none;
        border-left: 1px solid var(--border-color);
        z-index: 2000;
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.75);
        transform: translateX(0);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        background: #121212;
        /* Solid background for mobile overlay */
    }


    .search-sidebar.hidden {
        display: flex;
        /* Keep layout for transition */
        transform: translateX(100%);
        visibility: visible;
        /* Ensure it stays in DOM for transition */
        pointer-events: none;
    }

    /* Overlay backdrop */
    .analysis-section.with-sidebar::after {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 900;
        backdrop-filter: blur(2px);
        animation: fadeIn 0.3s ease;
    }



    .analysis-section {
        max-width: 100%;
    }

    /* Reset margin on tablet/mobile so content stays centered/full */
    .analysis-section.with-sidebar {
        margin: 0 auto;
    }
}

/* ===== Main Content (Legacy Wrapper removal) ===== */
.main {
    position: relative;
    width: 100%;
}

/* ===== Hero Section ===== */
.hero {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.hero-title {
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ===== Card Styles ===== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: inherit;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab svg {
    width: 16px;
    height: 16px;
}

.tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.tab.active {
    background: var(--accent);
    color: var(--bg-primary);
}

/* ===== Input Sections ===== */
.input-section {
    display: none;
}

.input-section.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

.input-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

/* ===== Text Area ===== */
.text-area {
    width: 100%;
    min-height: 140px;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-size-md);
    resize: vertical;
    transition: all var(--transition-fast);
}

.text-area:focus {
    outline: none;
    border-color: var(--text-muted);
}

.text-area::placeholder {
    color: var(--text-muted);
}

.char-count {
    text-align: right;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* ===== Drop Zone ===== */
.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-2xl);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--text-muted);
    background: var(--bg-hover);
}

.drop-zone svg {
    width: 40px;
    height: 40px;
    color: var(--text-muted);
}

.drop-zone p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.drop-zone span {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.drop-zone.small {
    padding: var(--space-lg);
}

.drop-zone.small svg {
    width: 28px;
    height: 28px;
}

/* ===== Image Preview ===== */
.image-preview {
    display: none;
    position: relative;
    margin-top: var(--space-md);
}

.image-preview.visible {
    display: block;
}

.image-preview img {
    max-width: 100%;
    max-height: 280px;
    border-radius: var(--radius-md);
    object-fit: contain;
    border: 1px solid var(--border-color);
}

.image-preview.small img {
    max-height: 140px;
}

.remove-image {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.remove-image:hover {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

/* ===== Combined Input ===== */
.combined-grid {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: var(--space-lg);
}

@media (max-width: 640px) {
    .combined-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn svg {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.analyze-btn {
    width: 100%;
    margin-top: var(--space-lg);
    padding: var(--space-md);
    font-size: var(--font-size-md);
}

/* ===== Loading Section ===== */
.loading-section {
    margin-top: var(--space-xl);
}

.loading-card {
    text-align: center;
    padding: var(--space-2xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-lg);
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.loading-steps {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.loading-steps .step {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    position: relative;
    padding-left: var(--space-lg);
}

.loading-steps .step::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-muted);
    opacity: 0.3;
}

.loading-steps .step.active {
    color: var(--text-primary);
}

.loading-steps .step.active::before {
    background: var(--accent);
    opacity: 1;
    animation: pulse 1s ease infinite;
}

.loading-steps .step.done::before {
    background: var(--success);
    opacity: 1;
}

@keyframes pulse {

    0%,
    100% {
        transform: translateY(-50%) scale(1);
    }

    50% {
        transform: translateY(-50%) scale(1.2);
    }
}

/* ===== Results Section ===== */
.results-section {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* ===== Verdict Card ===== */
.verdict-card {
    text-align: center;
}

.verdict-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.verdict-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    border: 2px solid;
}

.verdict-icon.true {
    border-color: var(--success);
    color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.verdict-icon.false {
    border-color: var(--danger);
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.verdict-icon.uncertain,
.verdict-icon.misleading,
.verdict-icon.partially_true {
    border-color: var(--warning);
    color: var(--warning);
    background: rgba(234, 179, 8, 0.1);
}

.verdict-label {
    font-size: var(--font-size-xl);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.verdict-label.true {
    color: var(--success);
}

.verdict-label.false {
    color: var(--danger);
}

.verdict-label.uncertain,
.verdict-label.misleading,
.verdict-label.partially_true {
    color: var(--warning);
}

.verdict-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ===== Confidence Bar ===== */
.confidence-bar {
    margin-top: var(--space-lg);
}

.confidence-label {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.confidence-track {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.8s ease;
}

/* ===== Details Card ===== */
.card-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-md);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.card-title svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.reasoning {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Claims List ===== */
.claims-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.claim-item {
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 2px solid var(--text-muted);
}

.claim-item.true {
    border-left-color: var(--success);
}

.claim-item.false {
    border-left-color: var(--danger);
}

.claim-item.uncertain {
    border-left-color: var(--warning);
}

.claim-text {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xs);
}

.claim-assessment {
    display: inline-block;
    padding: 2px var(--space-sm);
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.claim-item.true .claim-assessment {
    color: var(--success);
}

.claim-item.false .claim-assessment {
    color: var(--danger);
}

.claim-item.uncertain .claim-assessment {
    color: var(--warning);
}

.claim-explanation {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ===== Image Info Card ===== */
.exif-section,
.reverse-search-section {
    margin-bottom: var(--space-lg);
}

.exif-section h4,
.reverse-search-section h4 {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.exif-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-sm);
}

.exif-item {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.exif-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

.exif-value {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    word-break: break-all;
}

.exif-warnings {
    margin-top: var(--space-md);
}

.exif-warning {
    padding: var(--space-sm) var(--space-md);
    background: rgba(234, 179, 8, 0.1);
    border: 1px solid rgba(234, 179, 8, 0.2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--warning);
    margin-bottom: var(--space-sm);
}

.help-text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.search-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.search-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.search-link:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

/* ===== Sources Section - Horizontal Favicon Row ===== */
.sources-card {
    padding-bottom: var(--space-lg);
}

.sources-card .card-title {
    margin-bottom: var(--space-md);
}

.sources-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
}

.source-favicon {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.source-favicon:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.source-favicon img {
    width: 22px;
    height: 22px;
    object-fit: contain;
}

.source-label {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) scale(0.9);
    padding: 4px 10px;
    background: var(--accent);
    color: var(--bg-primary);
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.source-label::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--accent);
}

.source-favicon:hover .source-label {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1);
}

.sources-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
}

.view-sources-btn {
    width: 100%;
    max-width: 300px;
    height: 44px;
    font-weight: 600;
    gap: var(--space-md);
}

.sources-preview-text {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    max-width: 400px;
    line-height: 1.5;
}

.source-icon-wrapper:hover .source-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1);
}

.source-tooltip-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.source-tooltip-snippet {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: var(--space-sm);
}

.source-tooltip-url {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.source-tooltip-url:hover {
    color: var(--accent);
}

.source-tooltip-badge {
    display: inline-block;
    padding: 2px var(--space-sm);
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-top: var(--space-sm);
}

/* ===== How It Works Section ===== */
.how-it-works {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: var(--space-2xl) auto;
    padding: var(--space-2xl) var(--space-lg);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.step-card {
    text-align: center;
    padding: var(--space-lg);
}

.step-number {
    width: 36px;
    height: 36px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--bg-primary);
    border-radius: 50%;
    font-size: var(--font-size-md);
    font-weight: 600;
}

.step-card h3 {
    font-size: var(--font-size-md);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.step-card p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ===== Footer ===== */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--border-color);
}

.footer-note {
    margin-top: var(--space-sm);
    color: var(--text-secondary);
}

/* ===== Utility Classes ===== */
.hidden {
    display: none !important;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .header {
        padding: var(--space-md);
    }

    .nav {
        display: none;
    }

    .main {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .glass-card {
        padding: var(--space-md);
    }

    .tabs {
        flex-direction: column;
    }

    .loading-steps {
        flex-direction: column;
        gap: var(--space-md);
    }

    .verdict-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }

    .source-icon {
        width: 40px;
        height: 40px;
    }

    .source-tooltip {
        min-width: 240px;
        max-width: 280px;
    }
}