/* ==========================================================================
   DownVid - Master Stylesheet
   Designed for High Performance, Professionalism & Google AdSense Compliance
   ========================================================================== */

:root {
    --bg-main: #0b0f19;
    --bg-surface: #111827;
    --bg-card: #1e293b;
    --bg-card-hover: #283548;
    --border: #334155;
    --border-light: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.15);
    --accent: #a855f7;
    --success: #10b981;
    --warning: #f59e0b;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-w: 1200px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 35px -5px rgba(99, 102, 241, 0.3);
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border: #e2e8f0;
    --border-light: rgba(0, 0, 0, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: rgba(79, 70, 229, 0.08);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 30px -5px rgba(79, 70, 229, 0.15);
}

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

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--primary-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* ================= Navbar ================= */
header.site-header {
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

[data-theme="light"] header.site-header {
    background: rgba(255, 255, 255, 0.9);
}

.nav-container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.15s;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff !important;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--text-muted);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ================= Content Container ================= */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.page-wrapper {
    flex: 1;
    padding: 40px 0 80px;
}

/* ================= AdSense Placeholder Units ================= */
.ad-slot-wrapper {
    margin: 30px auto;
    text-align: center;
    max-width: 100%;
    clear: both;
}

.ad-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 6px;
    display: block;
}

.ad-slot {
    background: rgba(30, 41, 59, 0.3);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    overflow: hidden;
}

[data-theme="light"] .ad-slot {
    background: rgba(226, 232, 240, 0.4);
}

/* ================= Hero Section ================= */
.hero-section {
    padding: 60px 0 40px;
    text-align: center;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-light);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #818cf8;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-title span {
    background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto 36px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.features-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.features-banner span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ================= Cards & Grids ================= */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-bottom: 50px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 32px;
    margin-bottom: 50px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ================= How It Works Steps ================= */
.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.step-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    position: relative;
}

.step-number {
    position: absolute;
    top: -14px;
    left: 24px;
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
}

/* ================= Article & Editorial Pages ================= */
.article-container {
    max-width: 820px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
}

.article-header {
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.article-header h1 {
    font-size: 2.4rem;
    line-height: 1.25;
    margin-bottom: 16px;
}

.article-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    gap: 16px;
    align-items: center;
}

.article-content h2 {
    font-size: 1.55rem;
    margin: 36px 0 16px;
    color: var(--text-primary);
}

.article-content h3 {
    font-size: 1.25rem;
    margin: 28px 0 12px;
}

.article-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.02rem;
    line-height: 1.75;
}

.article-content ul, .article-content ol {
    margin: 0 0 24px 24px;
    color: var(--text-secondary);
}

.article-content li {
    margin-bottom: 10px;
    line-height: 1.7;
}

.article-content code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: #f43f5e;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-primary);
    font-style: italic;
}

/* ================= FAQ Accordion ================= */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    overflow: hidden;
}

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.65;
    font-size: 0.95rem;
}

/* ================= Footer ================= */
footer.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color 0.15s;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 16px;
}

/* ================= Mobile Responsiveness ================= */
@media (max-width: 868px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .nav-menu {
        display: none;
    }
    .mobile-toggle {
        display: block;
    }
    .article-container {
        padding: 24px;
    }
}

@media (max-width: 560px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 1.85rem;
    }
    .hero-desc {
        font-size: 1rem;
    }
}