/* ============================================================
   AI Chat Landing — Premium AI Startup Theme
   RTL-friendly, mobile-first, performance-optimized
   ============================================================ */

:root {
  --c-bg: #0a0e1a;
  --c-bg-2: #0f1525;
  --c-surface: #141c30;
  --c-surface-2: #1a2440;
  --c-border: rgba(255, 255, 255, 0.08);
  --c-text: #e8edf7;
  --c-text-dim: #9aa6c2;
  --c-text-mute: #6b7794;
  --c-primary: #3b82f6;
  --c-primary-2: #60a5fa;
  --c-accent: #06b6d4;
  --c-accent-2: #22d3ee;
  --c-success: #10b981;
  --c-warning: #f59e0b;
  --c-error: #ef4444;
  --c-glow: rgba(59, 130, 246, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px -10px var(--c-glow);
  --container: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "Vazirmatn", "IranYekan", "Shabnam", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  font-size: 16px;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
.section { padding: 80px 0; position: relative; }
.section-sm { padding: 56px 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-accent-2);
  padding: 6px 14px; border-radius: 999px;
  background: rgba(34, 211, 238, 0.08); border: 1px solid rgba(34, 211, 238, 0.18);
  margin-bottom: 18px;
}
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head p { color: var(--c-text-dim); font-size: 1.05rem; margin-top: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 28px; border-radius: 999px;
  font-weight: 600; font-size: 1rem; line-height: 1;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
  will-change: transform;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  box-shadow: 0 10px 30px -10px var(--c-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -10px var(--c-glow); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--c-text);
  border: 1px solid var(--c-border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }
.btn-lg { padding: 16px 34px; font-size: 1.05rem; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 100;
  padding: 18px 0;
  transition: background 0.3s var(--ease), padding 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 12px 0;
  box-shadow: 0 1px 0 var(--c-border);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; letter-spacing: -0.02em; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 1.1rem;
  box-shadow: var(--shadow-glow);
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--c-text-dim); font-weight: 500; font-size: 0.95rem; transition: color 0.2s; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--c-text); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none; width: 44px; height: 44px; border-radius: 10px;
  border: 1px solid var(--c-border); background: rgba(255, 255, 255, 0.04);
  color: var(--c-text); font-size: 1.3rem;
}

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: 140px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 50% at 80% 0%, rgba(59, 130, 246, 0.18), transparent 70%),
    radial-gradient(50% 40% at 10% 20%, rgba(6, 182, 212, 0.14), transparent 70%),
    linear-gradient(180deg, var(--c-bg), var(--c-bg-2));
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
}
.hero h1 { margin-bottom: 20px; }
.hero h1 .grad {
  background: linear-gradient(135deg, var(--c-primary-2), var(--c-accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: 1.15rem; color: var(--c-text-dim); max-width: 560px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 32px; }
.hero-trust { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; color: var(--c-text-mute); font-size: 0.9rem; }
.hero-trust .stars { color: var(--c-warning); letter-spacing: 2px; }

/* Chat mockup */
.hero-art { position: relative; }
.chat-card {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow), var(--shadow-glow);
  padding: 22px;
  position: relative; overflow: hidden;
}
.chat-card::before {
  content: ""; position: absolute; inset-block-start: 0; inset-inline: 0; height: 90px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(6, 182, 212, 0.18));
  filter: blur(40px); opacity: 0.6;
}
.chat-head { display: flex; align-items: center; gap: 12px; position: relative; margin-bottom: 18px; }
.chat-avatar { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); display: grid; place-items: center; color: #fff; font-weight: 700; }
.chat-name { font-weight: 600; }
.chat-status { font-size: 0.8rem; color: var(--c-success); display: flex; align-items: center; gap: 6px; }
.chat-status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--c-success); box-shadow: 0 0 8px var(--c-success); }
.chat-body { display: flex; flex-direction: column; gap: 12px; position: relative; }
.bubble { padding: 12px 16px; border-radius: 14px; max-width: 85%; font-size: 0.95rem; line-height: 1.6; }
.bubble.user { background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.bubble.bot { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--c-border); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-typing { display: inline-flex; gap: 4px; padding: 14px 16px; }
.chat-typing span { width: 7px; height: 7px; border-radius: 50%; background: var(--c-text-mute); animation: blink 1.4s infinite both; }
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.25; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

/* ---------- Logos / trust strip ---------- */
.logos { padding: 40px 0; border-block: 1px solid var(--c-border); background: var(--c-bg-2); }
.logos-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 28px; }
.logos-row .logo-item { color: var(--c-text-mute); font-weight: 700; font-size: 1.05rem; opacity: 0.7; transition: opacity 0.2s; }
.logos-row .logo-item:hover { opacity: 1; }

/* ---------- Features grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
  height: 100%;
}
.card:hover { transform: translateY(-4px); border-color: rgba(59, 130, 246, 0.4); box-shadow: var(--shadow-glow); }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.4rem; color: #fff;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  margin-bottom: 18px; box-shadow: var(--shadow-glow);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--c-text-dim); font-size: 0.97rem; }

/* ---------- Benefits split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.benefit-list { display: flex; flex-direction: column; gap: 22px; }
.benefit { display: flex; gap: 16px; align-items: flex-start; }
.benefit .b-icon {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px;
  background: rgba(34, 211, 238, 0.1); color: var(--c-accent-2);
  display: grid; place-items: center; font-size: 1.2rem; border: 1px solid rgba(34, 211, 238, 0.2);
}
.benefit h3 { margin-bottom: 4px; }
.benefit p { color: var(--c-text-dim); font-size: 0.97rem; }
.split-art {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(6, 182, 212, 0.08));
  border: 1px solid var(--c-border);
  min-height: 380px;
  display: grid; place-items: center;
  position: relative; overflow: hidden;
}
.split-art .ph { color: var(--c-text-mute); font-size: 0.9rem; text-align: center; padding: 20px; }

/* ---------- Stats ---------- */
.stats { background: var(--c-bg-2); border-block: 1px solid var(--c-border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat .num { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -0.03em; background: linear-gradient(135deg, var(--c-primary-2), var(--c-accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { color: var(--c-text-dim); font-size: 0.95rem; margin-top: 6px; }

/* ---------- Why choose / steps ---------- */
.steps { display: flex; flex-direction: column; gap: 0; }
.step { display: grid; grid-template-columns: 80px 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--c-border); }
.step:last-child { border-bottom: none; }
.step .num {
  width: 56px; height: 56px; border-radius: 50%;
  border: 1px solid var(--c-border); background: var(--c-surface);
  display: grid; place-items: center; font-weight: 800; font-size: 1.2rem; color: var(--c-accent-2);
}
.step h3 { margin-bottom: 6px; }
.step p { color: var(--c-text-dim); }

/* ---------- Testimonials ---------- */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.testi {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 28px;
}
.testi .stars { color: var(--c-warning); margin-bottom: 14px; letter-spacing: 2px; }
.testi p { color: var(--c-text); font-size: 1rem; margin-bottom: 18px; }
.testi .who { display: flex; align-items: center; gap: 12px; }
.testi .who .av { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); display: grid; place-items: center; color: #fff; font-weight: 700; }
.testi .who .name { font-weight: 600; }
.testi .who .role { color: var(--c-text-mute); font-size: 0.85rem; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin-inline: auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--c-border); border-radius: var(--radius-sm); background: var(--c-surface); overflow: hidden; }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; font-weight: 600; font-size: 1.02rem; color: var(--c-text); text-align: start;
}
.faq-q .pm { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 8px; background: rgba(255,255,255,0.05); display: grid; place-items: center; transition: transform 0.3s var(--ease); color: var(--c-accent-2); }
.faq-item.open .faq-q .pm { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s var(--ease); }
.faq-a-inner { padding: 0 22px 20px; color: var(--c-text-dim); }
.faq-item.open .faq-a { max-height: 320px; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.1));
  border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  padding: 56px 40px; text-align: center;
}
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--c-text-dim); max-width: 560px; margin: 0 auto 28px; }
.cta-band::before {
  content: ""; position: absolute; inset-block-start: -50%; inset-inline: -20%; height: 200%;
  background: radial-gradient(closest-side, rgba(59,130,246,0.18), transparent 70%);
  z-index: -1;
}

/* ---------- Footer ---------- */
.site-footer { background: var(--c-bg-2); border-top: 1px solid var(--c-border); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 40px; }
.footer-brand p { color: var(--c-text-dim); margin-top: 14px; max-width: 320px; font-size: 0.95rem; }
.footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--c-text); }
.footer-col a { display: block; color: var(--c-text-dim); font-size: 0.93rem; padding: 5px 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--c-accent-2); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-top: 24px; border-top: 1px solid var(--c-border); color: var(--c-text-mute); font-size: 0.88rem; flex-wrap: wrap; }
.social { display: flex; gap: 10px; }
.social a { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--c-border); display: grid; place-items: center; color: var(--c-text-dim); transition: all 0.2s; }
.social a:hover { color: #fff; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); border-color: transparent; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-art { order: -1; max-width: 480px; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .testi-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (max-width: 640px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: grid; place-items: center; }
  .nav-links.open {
    display: flex; position: absolute; top: 100%; inset-inline: 12px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(15, 21, 37, 0.98); backdrop-filter: blur(14px);
    border: 1px solid var(--c-border); border-radius: 14px; padding: 10px;
  }
  .nav-links.open a { padding: 12px 14px; border-radius: 8px; }
  .nav-links.open a:hover { background: rgba(255,255,255,0.05); }
  .grid-3, .grid-2, .testi-grid, .footer-grid, .stats-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { padding: 110px 0 60px; }
  .cta-band { padding: 40px 22px; }
  .step { grid-template-columns: 56px 1fr; gap: 16px; }
}

/* Irannian AI content refinements */
.skip-link{position:fixed;inset-block-start:8px;inset-inline-start:-9999px;z-index:999;width:1px;height:1px;overflow:hidden}
.skip-link:focus{inset-inline-start:8px;width:auto;height:auto;padding:10px 16px;border-radius:10px;background:var(--c-primary);color:#fff}
.brand-mark{width:42px;height:42px;font-size:.9rem}
.strip-title{margin-bottom:22px;color:var(--c-text-mute);text-align:center;font-size:.85rem;letter-spacing:.04em}
.trust-dot{display:inline-flex;align-items:center;gap:7px}
.trust-dot::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c-success);box-shadow:0 0 10px rgba(16,185,129,.7)}
.section-copy{margin:14px 0 28px;color:var(--c-text-dim)}
.decision-panel{width:min(88%,440px);padding:24px;border:1px solid rgba(255,255,255,.1);border-radius:20px;background:rgba(10,14,26,.72);box-shadow:0 30px 70px -34px rgba(6,182,212,.7);backdrop-filter:blur(10px)}
.panel-top,.panel-result{display:flex;align-items:center;justify-content:space-between;gap:16px}
.panel-top{padding-bottom:16px;border-bottom:1px solid var(--c-border);font-weight:700}
.live-badge{padding:5px 10px;border:1px solid rgba(16,185,129,.25);border-radius:99px;background:rgba(16,185,129,.1);color:#6ee7b7;font-size:.75rem}
.decision-row{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:center;padding:17px 0;border-bottom:1px solid var(--c-border)}
.decision-num{display:grid;place-items:center;width:38px;height:38px;border:1px solid rgba(34,211,238,.25);border-radius:11px;background:rgba(34,211,238,.08);color:var(--c-accent-2);font-weight:800}
.decision-row strong,.decision-row small{display:block}
.decision-row small{margin-top:3px;color:var(--c-text-mute);font-size:.78rem}
.panel-result{padding-top:18px;color:var(--c-text-dim);font-size:.85rem}
.panel-result strong{color:var(--c-text);font-size:.92rem}
.step-cta{margin-top:28px}
.audience-section{background:var(--c-bg-2)}
.audience-icon{display:grid;place-items:center;width:48px;height:48px;margin-bottom:18px;border:1px solid rgba(34,211,238,.22);border-radius:14px;background:rgba(34,211,238,.08);color:var(--c-accent-2);font-size:1.3rem}
.testi h3{margin-bottom:10px}
.use-tag{display:inline-flex;margin-top:6px;padding:6px 11px;border:1px solid var(--c-border);border-radius:99px;color:var(--c-primary-2);font-size:.75rem}
.cta-actions{justify-content:center}
.legal-mini{margin-top:15px;color:var(--c-accent-2);font-size:.8rem}
.footer-site-link{direction:ltr;color:var(--c-accent-2);font-weight:700}
.footer-site-link:hover{color:var(--c-text)}
@media (max-width:640px){
  .hero-trust{align-items:flex-start;flex-direction:column;gap:10px}
  .decision-panel{width:94%;padding:18px}
  .logo-item{flex:1 1 42%;text-align:center}
  .btn-lg{width:100%}
}