/* ============================================
   CHATSEY STUDIO — Clean Light Theme
   Apple-style SF Pro, white bg, black text
   © 2026 BTS Innovations LLC
   ============================================ */

:root {
    --bg: #ffffff;
    --bg-section: #f5f5f7;
    --bg-card: #ffffff;
    --bg-card-hover: #fafafa;
    --border: #e5e5e7;
    --border-hover: #d1d1d6;
    --text: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-muted: #86868b;
    --accent: #1d1d1f;
    --accent-green: #30d158;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { max-width: 1400px; margin: 0 auto; padding: 0 24px; }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 14px 0;
    background: rgba(255,255,255,0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s;
}
.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}
.logo-icon {
    width: 28px;
    height: 28px;
    background: var(--text);
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 800;
}
.nav-links { display: flex; gap: 28px; }
.nav-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
    letter-spacing: -0.01em;
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.btn-signin {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    transition: color 0.2s;
}
.btn-signin:hover { color: var(--text); }
.btn-start {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 10px 22px;
    background: var(--text);
    border-radius: 100px;
    color: #fff;
    transition: all 0.2s;
}
.btn-start:hover { opacity: 0.85; }

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: 140px 24px 80px;
    text-align: center;
    background: var(--bg);
}
.hero-content { max-width: 680px; margin: 0 auto; }
.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    border: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-weight: 500;
}
.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin-bottom: 16px;
    color: var(--text);
}
.hero-sub {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; margin-bottom: 56px; }
.btn-primary {
    padding: 14px 30px;
    background: var(--text);
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    color: #fff;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-family: inherit;
}
.btn-primary:hover { opacity: 0.85; }
.btn-secondary {
    padding: 14px 30px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text);
    transition: all 0.2s;
    font-family: inherit;
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-section); }
.hero-stats { display: flex; gap: 56px; justify-content: center; }
.stat { text-align: center; }
.stat-num {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }

/* ============================================
   SECTIONS
   ============================================ */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-section); }
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
    color: var(--text);
}
.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ============================================
   CATEGORY BANNER
   ============================================ */
.category-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 32px 40px;
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
}
.category-banner.video { background: #e8f5e9; }
.category-banner.photo { background: #fff3e0; }
.category-banner.audio { background: #e3f2fd; }
.category-banner.other { background: #f3e5f5; }
.category-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.category-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 500px;
}
.category-art {
    font-size: 3rem;
    opacity: 0.7;
}

/* ============================================
   TOOL CARDS (Photo-heavy, DreamFace style)
   ============================================ */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 60px;
}
.tool-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    border: 1px solid transparent;
}
.tool-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
}
.tool-thumb {
    width: 100%;
    aspect-ratio: 16/10;
    background: var(--bg-section);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}
.tool-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.tool-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    background: linear-gradient(135deg, #f0f0f0, #e8e8e8);
    color: var(--text-muted);
}
.tool-card-info {
    padding: 16px 18px;
}
.tool-card-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 3px;
}
.tool-card-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.tool-card-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(0,0,0,0.7);
    color: #fff;
    backdrop-filter: blur(10px);
}

/* ============================================
   FEATURED TOOLS (Large Cards)
   ============================================ */
.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 60px;
}
.featured-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 40px;
    gap: 40px;
    transition: all 0.3s;
    cursor: pointer;
}
.featured-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}
.featured-card.full-width {
    grid-column: 1 / -1;
}
.featured-preview {
    width: 240px;
    height: 240px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-section);
}
.featured-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.featured-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.featured-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}
.featured-info .btn-tool {
    display: inline-block;
    padding: 12px 24px;
    background: var(--text);
    color: #fff;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: opacity 0.2s;
}
.featured-info .btn-tool:hover { opacity: 0.85; }

/* ============================================
   TABS
   ============================================ */
.tool-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}
.tab {
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}
.tab:hover { border-color: var(--border-hover); color: var(--text); }
.tab.active {
    background: var(--text);
    border-color: var(--text);
    color: #fff;
}

/* ============================================
   STEPS
   ============================================ */
.steps-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
}
.step-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}
.step-card:hover { box-shadow: var(--shadow-card); }
.step-num {
    width: 44px;
    height: 44px;
    background: var(--text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin: 0 auto 16px;
}
.step-card h3 { font-size: 1rem; margin-bottom: 8px; font-weight: 600; }
.step-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* ============================================
   PRIVACY BLOCK
   ============================================ */
.privacy-block {
    text-align: center;
    padding: 56px;
    background: var(--bg-section);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
}
.privacy-icon {
    width: 56px;
    height: 56px;
    background: var(--text);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}
.privacy-icon svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}
.privacy-block h2 { margin-bottom: 12px; font-size: 1.8rem; }
.privacy-block > p {
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 28px;
    line-height: 1.7;
    font-size: 0.95rem;
}
.privacy-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.badge {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 64px 0 32px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.footer-desc { color: var(--text-muted); font-size: 0.82rem; line-height: 1.6; }
.footer-col h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 14px;
    font-weight: 600;
}
.footer-col a {
    display: block;
    font-size: 0.82rem;
    color: var(--text-muted);
    padding: 3px 0;
    transition: color 0.2s;
}
.footer-col a:hover { color: var(--text); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.footer-bottom p { font-size: 0.78rem; color: var(--text-muted); }
.social-links { display: flex; gap: 20px; }
.social-links a { font-size: 0.82rem; color: var(--text-muted); transition: color 0.2s; }
.social-links a:hover { color: var(--text); }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .featured-grid { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero { padding: 120px 24px 60px; }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .hero-stats { gap: 28px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .privacy-block { padding: 28px; }
    .featured-card { flex-direction: column; padding: 24px; }
    .featured-preview { width: 100%; height: 200px; }
    .category-banner { flex-direction: column; text-align: center; gap: 16px; }
}
@media (max-width: 480px) {
    .tools-grid { grid-template-columns: 1fr; }
    .hero-cta { flex-direction: column; align-items: center; }
    .footer-grid { grid-template-columns: 1fr; }
}