/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --black: #111111;
  --ink: #222222;
  --gray-dark: #333333;
  --gray: #666666;
  --gray-light: #aaaaaa;
  --border: #d0ccc6;
  --bg: #f8f6f2;
  --bg-alt: #f2efe9;
  --white: #ffffff;
  --accent: #1a3a5c;
  --accent-light: #e4ecf5;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --max-w: 1080px;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }

/* ─── HEADER ─── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248,246,242,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 32px; height: 60px; }
.logo { font-family: var(--font-display); font-size: 22px; font-weight: 600; color: var(--black); text-decoration: none; letter-spacing: -0.5px; flex-shrink: 0; }
.nav { display: flex; gap: 28px; flex: 1; }
.nav a { font-size: 15px; color: var(--gray-dark); text-decoration: none; font-weight: 400; transition: color 0.2s; cursor: pointer; }
.nav a:hover { color: var(--black); }
.btn-header { font-size: 14px; font-weight: 500; color: var(--accent); text-decoration: none; border: 1.5px solid var(--accent); padding: 8px 20px; border-radius: 2px; transition: all 0.2s; flex-shrink: 0; cursor: pointer; }
.btn-header:hover { background: var(--accent); color: var(--white); }

/* ─── HERO ─── */
.hero { padding: 72px 0 64px; border-bottom: 1px solid var(--border); background: var(--white); }
.hero-eyebrow { font-family: var(--font-mono); font-size: 12px; color: var(--gray); letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 20px; }
.hero-title { font-family: var(--font-display); font-size: clamp(44px, 6vw, 78px); font-weight: 400; line-height: 1.08; letter-spacing: -2px; color: var(--black); margin-bottom: 24px; }
.hero-title em { font-style: italic; color: var(--accent); }
.hero-sub { font-size: 18px; color: var(--gray-dark); line-height: 1.7; max-width: 560px; margin-bottom: 36px; font-weight: 400; }
.hero-actions { display: flex; gap: 20px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.hero-note { font-family: var(--font-mono); font-size: 12px; color: var(--gray); letter-spacing: 0.3px; }

/* ─── КНОПКИ ─── */
.btn-primary { display: inline-block; background: var(--accent); color: var(--white); text-decoration: none; padding: 14px 28px; font-size: 16px; font-weight: 500; border-radius: 2px; transition: all 0.2s; cursor: pointer; }
.btn-primary:hover { background: var(--black); }
.btn-ghost { display: inline-block; color: var(--gray-dark); text-decoration: none; padding: 14px 0; font-size: 16px; border-bottom: 1px solid var(--gray-light); transition: all 0.2s; cursor: pointer; }
.btn-ghost:hover { color: var(--black); border-color: var(--black); }
.btn-large { padding: 16px 36px; font-size: 17px; }

/* ─── SECTIONS ─── */
.section-label { font-family: var(--font-mono); font-size: 11px; color: var(--gray); letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 16px; }
.section-title { font-family: var(--font-display); font-size: clamp(28px, 3.5vw, 42px); font-weight: 400; letter-spacing: -1px; color: var(--black); margin-bottom: 12px; line-height: 1.15; }
.section-sub { font-size: 17px; color: var(--gray-dark); line-height: 1.7; max-width: 540px; margin-bottom: 40px; }

/* ─── PAINS ─── */
.pains { padding: 56px 0; background: var(--bg-alt); border-bottom: 1px solid var(--border); border-top: 1px solid var(--border); }
.pains-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--border); margin-top: 28px; background: var(--border); gap: 1px; }
.pain-card { padding: 28px 32px; background: var(--bg-alt); transition: background 0.2s; }
.pain-card:hover { background: var(--white); }
.pain-num { font-family: var(--font-mono); font-size: 11px; color: var(--gray-light); margin-bottom: 12px; }
.pain-text { font-size: 16px; color: var(--ink); line-height: 1.6; font-style: italic; font-family: var(--font-display); font-weight: 400; }

/* ─── HOW ─── */
.how { padding: 56px 0; border-bottom: 1px solid var(--border); background: var(--white); }
.steps { display: flex; flex-direction: column; max-width: 560px; margin-bottom: 48px; }
.step { display: flex; gap: 24px; align-items: flex-start; padding: 22px 0; border-top: 1px solid var(--border); }
.step:first-child { border-top: none; }
.step-num { font-family: var(--font-mono); font-size: 12px; color: var(--gray-light); flex-shrink: 0; margin-top: 2px; width: 20px; }
.step-title { font-size: 16px; font-weight: 500; color: var(--black); margin-bottom: 4px; }
.step-desc { font-size: 15px; color: var(--gray-dark); line-height: 1.6; }
.step-arrow { display: none; }

.demo-block { background: var(--bg); border: 1px solid var(--border); border-radius: 3px; overflow: hidden; max-width: 620px; }
.demo-label { font-family: var(--font-mono); font-size: 11px; color: var(--gray); letter-spacing: 1.5px; text-transform: uppercase; padding: 12px 20px; border-bottom: 1px solid var(--border); }
.demo-chat { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.demo-msg { font-size: 15px; line-height: 1.65; padding: 14px 18px; border-radius: 2px; max-width: 92%; }
.demo-msg.user { background: var(--accent-light); color: var(--accent); align-self: flex-end; font-style: italic; font-family: var(--font-display); font-size: 16px; }
.demo-msg.bot { background: var(--white); border: 1px solid var(--border); color: var(--ink); align-self: flex-start; }
.demo-msg.bot strong { font-weight: 600; color: var(--black); }
.demo-ref { font-family: var(--font-mono); font-size: 12px; color: var(--gray); display: block; margin-top: 10px; }

/* ─── MODULES ─── */
.modules { padding: 56px 0; background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.modules-grid { display: grid; grid-template-columns: repeat(4,1fr); background: var(--border); gap: 1px; border: 1px solid var(--border); margin-top: 36px; }
.module { padding: 24px 28px; background: var(--bg-alt); transition: background 0.2s; }
.module:hover { background: var(--white); }
.module-icon { font-size: 22px; margin-bottom: 10px; }
.module-name { font-size: 15px; font-weight: 500; color: var(--black); margin-bottom: 5px; }
.module-desc { font-size: 13px; color: var(--gray-dark); line-height: 1.55; }

/* ─── PRICING ─── */
.pricing { padding: 56px 0; border-bottom: 1px solid var(--border); background: var(--white); }
.plans { display: grid; grid-template-columns: repeat(3,1fr); background: var(--border); gap: 1px; border: 1px solid var(--border); margin-top: 36px; margin-bottom: 24px; }
.plan { padding: 36px 32px; background: var(--bg); position: relative; }
.plan-featured { background: var(--white); }
.plan-badge { font-family: var(--font-mono); font-size: 10px; color: var(--accent); letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 12px; font-weight: 500; }
.plan-name { font-family: var(--font-display); font-size: 22px; font-weight: 400; color: var(--black); margin-bottom: 10px; }
.plan-price { font-family: var(--font-mono); font-size: 38px; font-weight: 500; color: var(--black); line-height: 1; margin-bottom: 4px; }
.plan-price span { font-size: 18px; font-weight: 400; color: var(--gray); }
.plan-period { font-size: 13px; color: var(--gray); margin-bottom: 24px; font-family: var(--font-mono); }
.plan-features { list-style: none; margin-bottom: 28px; display: flex; flex-direction: column; gap: 9px; }
.plan-features li { font-size: 15px; color: var(--gray-dark); padding-left: 20px; position: relative; line-height: 1.4; }
.plan-features li::before { content: '→'; position: absolute; left: 0; color: var(--gray-light); font-family: var(--font-mono); font-size: 11px; top: 3px; }
.plan-features li.disabled { color: var(--gray-light); text-decoration: line-through; }
.plan-btn { display: block; text-align: center; text-decoration: none; padding: 12px 20px; font-size: 15px; font-weight: 500; border-radius: 2px; transition: all 0.2s; cursor: pointer; }
.plan-btn-primary { background: var(--accent); color: var(--white); border: 1.5px solid var(--accent); }
.plan-btn-primary:hover { background: var(--black); border-color: var(--black); }
.plan-btn-ghost { background: transparent; color: var(--gray-dark); border: 1px solid var(--border); }
.plan-btn-ghost:hover { border-color: var(--gray-dark); color: var(--black); }
.docs-promo { display: flex; align-items: center; justify-content: space-between; padding: 24px 32px; border: 1px solid var(--border); background: var(--bg-alt); gap: 24px; flex-wrap: wrap; }
.docs-promo-text { font-size: 16px; color: var(--gray-dark); line-height: 1.5; }
.docs-promo-text strong { color: var(--black); font-weight: 500; }

/* ─── CTA ─── */
.cta { padding: 80px 0; text-align: center; background: var(--white); border-top: 1px solid var(--border); }
.cta-title { font-family: var(--font-display); font-size: clamp(30px, 4vw, 48px); font-weight: 400; letter-spacing: -1.5px; color: var(--black); margin-bottom: 14px; line-height: 1.15; }
.cta-sub { font-size: 17px; color: var(--gray); margin-bottom: 32px; }

/* ─── FOOTER ─── */
.footer { border-top: 1px solid var(--border); background: var(--bg-alt); }
.footer-inner { display: flex; gap: 64px; padding: 48px 40px; align-items: flex-start; }
.footer-logo { font-family: var(--font-display); font-size: 20px; font-weight: 600; color: var(--black); margin-bottom: 8px; }
.footer-desc { font-size: 13px; color: var(--gray); line-height: 1.6; max-width: 200px; }
.footer-links { display: flex; gap: 48px; flex: 1; justify-content: flex-end; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col-title { font-family: var(--font-mono); font-size: 10px; color: var(--gray-light); letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 4px; }
.footer-col a { font-size: 14px; color: var(--gray-dark); text-decoration: none; transition: color 0.2s; }
.footer-col a:hover { color: var(--black); }
.footer-bottom { display: flex; justify-content: space-between; padding: 14px 40px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: 11px; color: var(--gray-light); }

/* ─── DOCS PAGE ─── */
.docs-hero { padding: 64px 0 56px; border-bottom: 1px solid var(--border); background: var(--white); }
.docs-grid { display: grid; grid-template-columns: repeat(4,1fr); background: var(--border); gap: 1px; border: 1px solid var(--border); margin-top: 36px; }
.doc-card { padding: 24px 28px; background: var(--bg); display: flex; flex-direction: column; gap: 10px; transition: background 0.2s; }
.doc-card:hover { background: var(--white); }
.doc-type { font-family: var(--font-mono); font-size: 10px; color: var(--gray); letter-spacing: 1.5px; text-transform: uppercase; }
.doc-title { font-size: 15px; font-weight: 500; color: var(--black); line-height: 1.4; }
.doc-desc { font-size: 13px; color: var(--gray-dark); line-height: 1.55; flex: 1; }
.doc-price { font-family: var(--font-mono); font-size: 20px; font-weight: 500; color: var(--accent); }

/* ─── ANIMATIONS ─── */
@keyframes fadeUp { from { opacity:0; transform:translateY(14px); } to { opacity:1; transform:translateY(0); } }
.hero-eyebrow { animation: fadeUp 0.5s ease both; }
.hero-title   { animation: fadeUp 0.5s 0.1s ease both; }
.hero-sub     { animation: fadeUp 0.5s 0.2s ease both; }
.hero-actions { animation: fadeUp 0.5s 0.3s ease both; }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav { display: none; }
  .hero { padding: 48px 0 40px; }
  .pains-grid, .plans { grid-template-columns: 1fr; }
  .modules-grid, .docs-grid { grid-template-columns: repeat(2,1fr); }
  .footer-inner { flex-direction: column; gap: 28px; }
  .footer-links { justify-content: flex-start; flex-wrap: wrap; gap: 28px; }
}