/* ─── Landing Page — Chatty AI ─────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root {
    --bg: #faf8f5;
    --bg-light: #f5f0eb;
    --surface: #ffffff;
    --surface-alt: #f0ebe4;
    --text: #1a1611;
    --text-secondary: #6b5e4f;
    --text-muted: #9c8e7d;
    --accent: #c49a5c;
    --accent-light: #d4af76;
    --accent-bg: #fdf6ed;
    --border: #e8e0d6;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 2px 16px rgba(44,36,24,.06);
    --shadow-lg: 0 8px 40px rgba(44,36,24,.10);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html{scroll-behavior:smooth}
body{
    font-family:var(--font);
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:12px 24px;border-radius:var(--radius-sm);
    font-weight:600;font-size:15px;
    transition:all .2s ease;cursor:pointer;border:none;
}
.btn-primary{
    background:var(--text);color:#fff;
}
.btn-primary:hover{background:#352e22;transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.btn-outline{
    background:transparent;color:var(--text);
    border:1.5px solid var(--border);
}
.btn-outline:hover{border-color:var(--text-muted);background:var(--surface)}
.btn-lg{padding:16px 32px;font-size:16px;border-radius:var(--radius)}

/* ─── Nav ──────────────────────────────────────────────────────── */
.nav{
    position:fixed;top:0;left:0;right:0;z-index:100;
    background:rgba(250,248,245,.85);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
}
.nav-inner{
    display:flex;align-items:center;justify-content:space-between;
    height:64px;
}
.nav-logo{
    display:flex;align-items:center;gap:10px;
    font-weight:700;font-size:20px;
}
.nav-logo img{border-radius:8px}
.nav-links{display:flex;gap:32px}
.nav-links a{
    font-size:14px;font-weight:500;color:var(--text-secondary);
    transition:color .2s;
}
.nav-links a:hover{color:var(--text)}
.nav-cta{padding:10px 20px;font-size:14px}

/* ─── Hero ─────────────────────────────────────────────────────── */
.hero{
    padding:120px 0 80px;
    position:relative;overflow:hidden;
}
.hero-inner{
    display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
}
.badge{
    display:inline-block;padding:6px 16px;
    background:var(--accent-bg);color:var(--accent);
    border-radius:999px;font-size:13px;font-weight:600;
    margin-bottom:20px;
}
.hero h1{
    font-size:clamp(36px,5vw,56px);
    font-weight:800;line-height:1.1;
    letter-spacing:-.02em;margin-bottom:20px;
}
.gradient-text{
    background:linear-gradient(135deg,var(--accent) 0%,#8b6a3e 50%,var(--accent-light) 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;
    background-clip:text;
}
.hero-desc{
    font-size:18px;color:var(--text-secondary);
    line-height:1.7;margin-bottom:32px;max-width:480px;
}
.hero-actions{display:flex;gap:12px;margin-bottom:40px;flex-wrap:wrap}
.hero-stats{display:flex;gap:0;align-items:center}
.stat{display:flex;flex-direction:column;align-items:center;padding:0 24px}
.stat strong{font-size:24px;font-weight:700}
.stat span{font-size:12px;color:var(--text-muted);margin-top:2px}
.stat-divider{width:1px;height:32px;background:var(--border)}

/* Phone Mockup */
.hero-visual{display:flex;justify-content:center}
.phone-mockup{
    width:300px;
    background:var(--surface);
    border-radius:28px;
    padding:12px;
    box-shadow:var(--shadow-lg),0 0 0 1px var(--border);
    transform:rotate(2deg);
    animation:float 6s ease-in-out infinite;
}
@keyframes float{
    0%,100%{transform:rotate(2deg) translateY(0)}
    50%{transform:rotate(2deg) translateY(-10px)}
}
.phone-screen{
    background:var(--bg);
    border-radius:20px;
    padding:20px 16px;
    min-height:360px;
    display:flex;flex-direction:column;justify-content:flex-end;
}
.chat-demo{display:flex;flex-direction:column;gap:12px}
.demo-msg{
    padding:12px 16px;border-radius:16px;
    font-size:13px;line-height:1.5;
    animation:fadeInUp .6s ease both;
}
.user-msg{
    background:var(--surface);
    border:1px solid var(--border);
    align-self:flex-end;max-width:85%;
    animation-delay:.3s;
}
.bot-msg{
    background:var(--accent-bg);
    align-self:flex-start;max-width:90%;
    display:flex;gap:8px;align-items:flex-start;
    animation-delay:.8s;
}
.bot-msg .demo-avatar{border-radius:6px;flex-shrink:0;margin-top:2px}
.cursor-blink{animation:blink 1s steps(1) infinite;color:var(--accent)}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}

.hero-bg-glow{
    position:absolute;top:-200px;right:-200px;
    width:600px;height:600px;
    background:radial-gradient(circle,rgba(196,154,92,.08) 0%,transparent 70%);
    pointer-events:none;
}

/* ─── Sections ─────────────────────────────────────────────────── */
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:clamp(28px,4vw,40px);font-weight:700;margin-bottom:12px}
.section-header p{font-size:17px;color:var(--text-secondary)}

/* ─── Features ─────────────────────────────────────────────────── */
.features{padding:80px 0}
.features-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.feature-card{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:28px 24px;
    transition:all .3s ease;
    position:relative;overflow:hidden;
}
.feature-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-lg);
    border-color:var(--accent-light);
}
.feature-card.accent{
    background:var(--accent-bg);
    border-color:var(--accent-light);
}
.feature-icon{
    width:48px;height:48px;
    display:flex;align-items:center;justify-content:center;
    background:var(--bg-light);border-radius:12px;
    margin-bottom:16px;
}
.feature-icon svg{width:24px;height:24px;color:var(--accent)}
.feature-card.accent .feature-icon{background:rgba(196,154,92,.15)}
.feature-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.6}
.feature-badge{
    position:absolute;top:16px;right:16px;
    background:var(--accent);color:#fff;
    padding:3px 10px;border-radius:999px;
    font-size:11px;font-weight:700;text-transform:uppercase;
}

/* ─── Examples ─────────────────────────────────────────────────── */
.examples{padding:80px 0;background:var(--bg-light)}
.examples-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.example-card{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:24px;
    transition:all .3s ease;
    display:flex;flex-direction:column;gap:10px;
}
.example-card:hover{
    transform:translateY(-2px);box-shadow:var(--shadow);
    border-color:var(--accent-light);
}
.example-cat{font-size:13px;font-weight:600;color:var(--accent)}
.example-text{font-size:15px;color:var(--text-secondary);line-height:1.5;font-style:italic}

/* ─── CTA ──────────────────────────────────────────────────────── */
.cta-section{padding:80px 0}
.cta-inner{
    text-align:center;
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:24px;
    padding:60px 40px;
    box-shadow:var(--shadow);
}
.cta-avatar{border-radius:20px;margin-bottom:20px}
.cta-inner h2{font-size:32px;font-weight:700;margin-bottom:12px}
.cta-inner p{font-size:17px;color:var(--text-secondary);margin-bottom:28px}

/* ─── FAQ ──────────────────────────────────────────────────────── */
.faq{padding:80px 0;background:var(--bg-light)}
.faq-list{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    overflow:hidden;
}
.faq-item summary{
    padding:18px 24px;font-weight:600;font-size:15px;
    cursor:pointer;list-style:none;
    display:flex;justify-content:space-between;align-items:center;
    transition:background .2s;
}
.faq-item summary:hover{background:var(--bg-light)}
.faq-item summary::after{content:'＋';font-size:18px;color:var(--text-muted);transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 24px 18px;font-size:14px;color:var(--text-secondary);line-height:1.7}

/* ─── Footer ───────────────────────────────────────────────────── */
.footer{padding:32px 0;border-top:1px solid var(--border)}
.footer-inner{display:flex;align-items:center;justify-content:space-between}
.footer-brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px}
.footer-brand img{border-radius:6px}
.footer-copy{font-size:13px;color:var(--text-muted)}

/* ─── Mobile ───────────────────────────────────────────────────── */
@media(max-width:900px){
    .hero-inner{grid-template-columns:1fr;text-align:center;gap:40px}
    .hero-desc{margin:0 auto 32px}
    .hero-actions{justify-content:center}
    .hero-stats{justify-content:center}
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .examples-grid{grid-template-columns:repeat(2,1fr)}
    .nav-links{display:none}
}
@media(max-width:600px){
    .hero{padding:100px 0 60px}
    .features-grid{grid-template-columns:1fr}
    .examples-grid{grid-template-columns:1fr}
    .stat{padding:0 16px}
    .cta-inner{padding:40px 24px}
    .phone-mockup{width:260px}
    .footer-inner{flex-direction:column;gap:12px;text-align:center}
}