/* ===== Design tokens ===== */
:root {
  --ink: #0B1220;
  --ink-soft: #4C5B66;
  --primary: #0E7C86;
  --primary-dark: #0A5960;
  --accent: #7C3AED;
  --accent-soft: #F3EEFD;
  --amber: #F59E0B;
  --amber-soft: #FEF6E7;
  --teal-soft: #EAF6F5;
  --bg: #FFFFFF;
  --bg-soft: #F6F9F9;
  --border: #E3EAEA;
  --radius: 16px;
  --container: 1160px;
  --font-body: "Inter", sans-serif;
  --font-head: "Space Grotesk", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #EAF1F1;
    --ink-soft: #A9B8B8;
    --bg: #0B1417;
    --bg-soft: #101B1E;
    --border: #1D2C2F;
    --teal-soft: #12292A;
    --accent-soft: #201A33;
    --amber-soft: #2A2213;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--ink);
  margin: 0 0 .5em;
  line-height: 1.15;
}
p { color: var(--ink-soft); margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

/* ===== decorative dot field ===== */
.dot-field {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle, var(--primary) 1.5px, transparent 1.6px),
    radial-gradient(circle, var(--accent) 1.5px, transparent 1.6px),
    radial-gradient(circle, var(--amber) 1.5px, transparent 1.6px);
  background-size: 220px 220px, 260px 260px, 300px 300px;
  background-position: 0 0, 90px 140px, 180px 40px;
  opacity: .12;
}

/* ===== buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(14,124,134,.25); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--ink); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-light { background: #fff; color: var(--primary-dark); }
.btn-sm { padding: 10px 20px; font-size: 14px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.text-link { font-weight: 600; color: var(--primary); }
.text-link:hover { color: var(--accent); }

/* ===== header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-text { font-family: var(--font-head); font-size: 19px; font-weight: 600; color: var(--primary-dark); }
.logo-text strong { color: var(--accent); font-weight: 700; }
.logo-text.light { color: #fff; }
.logo-text.light strong { color: var(--amber); }

.main-nav { display: flex; gap: 28px; flex: 1; justify-content: center; }
.main-nav a { font-size: 15px; font-weight: 500; color: var(--ink-soft); white-space: nowrap; }
.main-nav a:hover { color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 16px; }
.header-phone { font-weight: 600; font-size: 14px; color: var(--ink); white-space: nowrap; }
.header-phone:hover { color: var(--primary); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: none; background: transparent;
  flex-direction: column; justify-content: center; gap: 5px;
  cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }

/* ===== hero ===== */
.hero { padding: 72px 0 40px; position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(32px, 4.2vw, 52px); font-weight: 700; }
.lead { font-size: 18px; max-width: 520px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin: 28px 0 8px; }
.hero-art { display: flex; justify-content: center; }
.path-illustration { width: 100%; max-width: 420px; }
.roadmap-label { fill: var(--ink); }

/* ===== audience (who is this for) ===== */
.audience { padding: 24px 0 72px; position: relative; z-index: 1; }
.audience-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 40px;
}
.audience-inner .eyebrow { display: block; }
.audience-inner h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 14px; }
.audience-inner .lead { max-width: 600px; margin: 0 auto; font-size: 16px; }
.audience-points {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}
.audience-point {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 20px 10px 10px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
}
.audience-icon {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.audience-icon-teal { background: var(--teal-soft); }
.audience-icon-violet { background: var(--accent-soft); }
.audience-icon-amber { background: var(--amber-soft); }

@media (max-width: 640px) {
  .audience-inner { padding: 36px 22px; }
  .audience-points { flex-direction: column; align-items: stretch; }
  .audience-point { justify-content: flex-start; }
}

/* ===== pillars ===== */
.pillar { padding: 64px 0; position: relative; z-index: 1; }
.pillar-alt { background: var(--bg-soft); }
.pillar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.pillar-grid-rev .pillar-copy { order: 2; }
.pillar-copy h2 { font-size: clamp(24px, 3vw, 34px); }
.pillar-copy p { max-width: 480px; }
.pillar-art { padding: 20px; }

/* ===== mission ===== */
.mission { padding: 80px 0; background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--accent)); position: relative; z-index: 1; }
.mission-inner { max-width: 700px; text-align: center; margin: 0 auto; }
.mission h2, .mission p { color: #fff; }
.mission p { opacity: .92; font-size: 17px; }
.mission .btn-primary { background: #fff; color: var(--primary-dark); box-shadow: none; }
.mission .btn-primary:hover { background: var(--amber-soft); }

/* ===== stats + badges ===== */
.stats { padding: 56px 0; position: relative; z-index: 1; }
.stats-grid { display: flex; justify-content: center; gap: 64px; flex-wrap: wrap; text-align: center; margin-bottom: 40px; }
.stat strong { display: block; font-family: var(--font-head); font-size: 34px; color: var(--primary); }
.stat span { font-size: 14px; color: var(--ink-soft); }
.tech-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.tech-badges span {
  padding: 8px 18px; border-radius: 999px; border: 1px solid var(--border);
  font-size: 13px; font-weight: 600; color: var(--ink-soft);
  background: var(--bg-soft);
}

/* ===== approach ===== */
.approach { padding: 80px 0; background: var(--bg-soft); position: relative; z-index: 1; }
.section-title { font-size: clamp(26px, 3.4vw, 36px); text-align: center; }
.section-subtitle { text-align: center; max-width: 560px; margin: 0 auto 40px; }
.approach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.approach-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; text-align: left;
}
.approach-icon {
  width: 56px; height: 56px; border-radius: 14px; background: var(--teal-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.approach-card h3 { font-size: 19px; }
.approach-card p { font-size: 15px; margin-bottom: 0; }

/* ===== programs ===== */
.programs { padding: 80px 0; position: relative; z-index: 1; }
.programs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.program-card {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: transform .15s ease, box-shadow .15s ease;
}
.program-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(11,18,32,.08); }
.program-tag {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; padding: 4px 12px; border-radius: 999px; margin-bottom: 14px;
}
.tag-teal { background: var(--teal-soft); color: var(--primary); }
.tag-violet { background: var(--accent-soft); color: var(--accent); }
.tag-amber { background: var(--amber-soft); color: #B4790C; }
.program-card h3 { font-size: 18px; }
.program-card p { font-size: 14.5px; margin-bottom: 0; }

/* ===== blog ===== */
.blog { padding: 80px 0; background: var(--bg-soft); position: relative; z-index: 1; }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.blog-date { font-size: 13px; font-weight: 600; color: var(--accent); }
.blog-card h3 { font-size: 17px; margin-top: 10px; }
.blog-card p { font-size: 14.5px; }

/* ===== downloads ===== */
.downloads { padding: 80px 0; position: relative; z-index: 1; }
.downloads-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; align-items: start; }
.download-card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.download-card h3 { font-size: 17px; }
.download-card p { font-size: 14.5px; }

/* ===== final cta ===== */
.final-cta {
  padding: 72px 0; text-align: center;
  background: radial-gradient(circle at 50% 0%, var(--teal-soft), var(--bg) 70%);
  position: relative; z-index: 1;
}
.final-cta h2 { font-size: clamp(24px, 3.2vw, 34px); max-width: 640px; margin-inline: auto; }
.final-cta p { max-width: 520px; margin: 0 auto 28px; }

/* ===== footer ===== */
.site-footer { background: #0B1220; color: #C9D6D6; padding: 60px 0 0; position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand p { color: #A9B8B8; font-size: 14px; margin-top: 12px; max-width: 260px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col a, .footer-col span { color: #A9B8B8; font-size: 14px; }
.footer-col a:hover { color: var(--amber); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 22px 0; font-size: 13px; color: #7C8C8C; }
.footer-social { display: flex; gap: 14px; }
.footer-social a {
  width: 34px; height: 34px; border-radius: 50%; border: 1px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700;
  color: #C9D6D6;
}
.footer-social a:hover { border-color: var(--amber); color: var(--amber); }

/* ===== reveal animation ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ===== responsive ===== */
@media (max-width: 960px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero-grid, .pillar-grid { grid-template-columns: 1fr; }
  .pillar-grid-rev .pillar-copy { order: 0; }
  .pillar-art { order: -1; max-width: 320px; margin: 0 auto; }
  .stats-grid { gap: 36px; }
  .approach-grid, .programs-grid, .blog-grid { grid-template-columns: 1fr; }
  .downloads-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .header-phone { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 14px; text-align: center; }
}

/* mobile nav open state */
.main-nav.open {
  display: flex;
  position: absolute;
  top: 100%; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  flex-direction: column;
  padding: 20px 24px;
  gap: 18px;
}

/* ===== signup modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 18, 32, .55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 200;
}
.modal-overlay[hidden] { display: none; }
.modal-panel {
  position: relative;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 36px;
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(11,18,32,.25);
}
.modal-panel h3 { font-size: 22px; margin-bottom: 6px; }
.modal-subtitle { font-size: 14px; margin-bottom: 20px; }
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--border); background: transparent;
  color: var(--ink-soft); cursor: pointer; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { border-color: var(--primary); color: var(--primary); }
.modal-form { display: flex; flex-direction: column; gap: 14px; }
.modal-form label { font-size: 13px; font-weight: 600; color: var(--ink-soft); display: flex; flex-direction: column; gap: 6px; }
.modal-form input, .modal-form select, .modal-form textarea {
  font-family: var(--font-body);
  font-size: 15px;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--ink);
  resize: vertical;
}
.modal-form input:focus, .modal-form select:focus, .modal-form textarea:focus {
  outline: none; border-color: var(--primary);
}
.modal-submit { justify-content: center; margin-top: 4px; }
.modal-status { font-size: 13.5px; margin: 6px 0 0; min-height: 18px; }
.modal-status.success { color: var(--primary); font-weight: 600; }
.modal-status.error { color: #DC2626; font-weight: 600; }

/* ===== telegram widget ===== */
.tg-fab {
  position: fixed;
  bottom: 24px;
  right: 96px;
  z-index: 150;
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #29A9EB;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 28px rgba(41,169,235,.35);
  transition: transform .15s ease;
}
.tg-fab:hover { transform: scale(1.06); }

/* ===== chat widget ===== */
.chat-widget { position: fixed; bottom: 24px; right: 24px; z-index: 150; }
.chat-bubble {
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 28px rgba(14,124,134,.35);
  transition: transform .15s ease;
}
.chat-bubble:hover { transform: scale(1.06); }
.chat-icon-close { display: none; }
.chat-bubble[aria-expanded="true"] .chat-icon-open { display: none; }
.chat-bubble[aria-expanded="true"] .chat-icon-close { display: block; }

.chat-panel {
  position: absolute;
  bottom: 74px; right: 0;
  width: 340px;
  max-width: calc(100vw - 32px);
  height: 460px;
  max-height: calc(100vh - 140px);
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(11,18,32,.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
}
.chat-panel[hidden] { display: none; }
.chat-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.chat-header span:first-child { font-weight: 700; font-size: 15px; }
.chat-status { font-size: 12px; opacity: .85; }
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg-soft);
}
.chat-msg {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.4;
}
.chat-msg.bot {
  align-self: flex-start;
  background: var(--teal-soft);
  color: var(--ink);
  border-bottom-left-radius: 4px;
}
.chat-msg.user {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.chat-input-row input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  background: var(--bg-soft);
  color: var(--ink);
}
.chat-input-row input:focus { outline: none; border-color: var(--primary); }
.chat-input-row button {
  width: 40px; height: 40px; border-radius: 50%;
  border: none; background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
}
.chat-input-row button:hover { background: var(--primary-dark); }

@media (max-width: 480px) {
  .chat-panel { width: calc(100vw - 32px); right: -6px; }
  .modal-panel { padding: 28px 22px; }
}