/* ============================================================
   STATIX · responsive & UX layer
   Подключать ПОСЛЕ style.css
   ============================================================ */

:root {
  /* Флюидная шкала: один источник правды вместо брейкпоинтных переопределений */
  --fs-xs: clamp(10px, 0.62rem + 0.18vw, 12px);
  --fs-sm: clamp(12px, 0.72rem + 0.22vw, 14px);
  --fs1:   clamp(14px, 0.84rem + 0.25vw, 16px);
  --fs2:   clamp(17px, 0.95rem + 0.9vw,  24px);
  --fs3:   clamp(22px, 1.15rem + 1.8vw,  32px);
  --fs4:   clamp(30px, 1.40rem + 3.0vw,  48px);
  --fs5:   clamp(38px, 1.70rem + 4.4vw,  64px);
  --fs6:   clamp(42px, 1.60rem + 8.2vw,  96px);

  --pad:  clamp(1.15rem, 0.6rem + 3.2vw, 4rem);
  --gap-y: clamp(3rem, 1.5rem + 6vw, 6rem);
  --maxw: 1680px;
  --tap:  44px;
  --r:    3px;
}

html { font-size: 100%; -webkit-text-size-adjust: 100%; }
html, body { overflow-x: clip; }
body { overscroll-behavior-y: none; }

/* Кастомный курсор — только для мыши */
.cursor, .cursor-dot { display: none; }
@media (hover: hover) and (pointer: fine) {
  .cursor, .cursor-dot { display: block; }
  body { cursor: none; }
}
@media (hover: none), (pointer: coarse) {
  body, .stack-item, .service, .cta-btn { cursor: auto; }
  .cta-btn, .stack-item { cursor: pointer; }
}

/* Сетка-оверлей */
.grid-overlay {
  background-size: clamp(48px, 8vw, 110px) clamp(48px, 8vw, 110px);
  opacity: .6;
}
@media (max-width: 600px) { .grid-overlay { display: none; } }

/* ─── Контейнер ─── */
nav, .hero, .services, .cases, .market, .about, .stack, .cta, .stats-bar,
.big-stat, .sl, .divider, footer {
  padding-left: max(var(--pad), env(safe-area-inset-left));
  padding-right: max(var(--pad), env(safe-area-inset-right));
}
.divider { margin-left: var(--pad); margin-right: var(--pad); padding: 0; }
.services-grid, .cases, .market-grid, .stack-list, .about,
.hero-bottom, .stats-bar, .market-intro { margin-inline: auto; max-width: var(--maxw); }

/* ─── NAV + бургер ─── */
nav { padding-top: clamp(.85rem, 2vw, 1.5rem); padding-bottom: clamp(.85rem, 2vw, 1.5rem);
      gap: 1rem; transition: transform .35s ease; }
nav.nav--hidden { transform: translateY(-101%); }
nav .links { gap: clamp(1rem, 3vw, 3rem); }
nav .links a { white-space: nowrap; }
nav .links a.is-active { color: var(--fg); }
nav .links a.is-active::after {
  content: ''; display: block; height: 1px; background: var(--accent); margin-top: 4px;
}

.nav-toggle {
  display: none; width: var(--tap); height: var(--tap); margin-right: -8px;
  background: none; border: 0; padding: 0; cursor: pointer; position: relative; z-index: 10005;
}
.nav-toggle span {
  position: absolute; left: 11px; width: 22px; height: 1.5px; background: var(--fg);
  transition: transform .3s cubic-bezier(.16, 1, .3, 1), opacity .2s;
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 28px; }
body.menu-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  nav .links {
    position: fixed; inset: 0; z-index: 10004;
    flex-direction: column; justify-content: center; align-items: flex-start;
    gap: 0; padding: 6rem var(--pad) calc(2rem + env(safe-area-inset-bottom));
    background: rgba(0, 0, 0, .97); backdrop-filter: blur(24px);
    transform: translateY(-100%); opacity: 0; visibility: hidden;
    transition: transform .45s cubic-bezier(.16, 1, .3, 1), opacity .3s, visibility .3s;
    display: flex;
  }
  body.menu-open nav .links { transform: none; opacity: 1; visibility: visible; }
  nav .links a {
    font-size: clamp(22px, 7vw, 34px); letter-spacing: .06em; color: var(--fg);
    padding: .55em 0; width: 100%; border-bottom: 1px solid var(--border);
    opacity: 0; transform: translateY(14px);
  }
  body.menu-open nav .links a {
    animation: navIn .5s cubic-bezier(.16, 1, .3, 1) forwards;
  }
  body.menu-open nav .links a:nth-child(1) { animation-delay: .06s; }
  body.menu-open nav .links a:nth-child(2) { animation-delay: .11s; }
  body.menu-open nav .links a:nth-child(3) { animation-delay: .16s; }
  body.menu-open nav .links a:nth-child(4) { animation-delay: .21s; }
  body.menu-open nav .links a:nth-child(5) { animation-delay: .26s; }
  body.menu-open nav .links a:nth-child(6) { animation-delay: .31s; }
  .nav-school { align-self: flex-start; margin-top: 1.5rem; border-bottom: 0 !important;
                font-size: 16px !important; padding: .6rem 1.2rem; }
  body.menu-open { overflow: hidden; }
}
@keyframes navIn { to { opacity: 1; transform: none; } }

/* ─── HERO ─── */
.hero {
  min-height: 100svh;
  padding-bottom: clamp(3rem, 10vh, 6rem);
  padding-top: clamp(6rem, 14vh, 8rem);
  justify-content: flex-end;
}
@supports not (min-height: 100svh) { .hero { min-height: 100vh; } }
.hero-label { margin-bottom: clamp(1.2rem, 5vh, 3rem); font-size: var(--fs-sm); letter-spacing: .16em; }
.hero h1 { font-size: var(--fs6); line-height: .9; word-break: normal; hyphens: manual; }
.hero-bottom { margin-top: clamp(1.5rem, 5vh, 4rem); gap: 1.5rem; }
.hero-sub { font-size: var(--fs2); max-width: 38ch; }
@media (max-width: 768px) {
  .hero-bottom { flex-direction: column; align-items: flex-start; }
  .hero-sub { max-width: 100%; }
}
.scroll-hint {
  position: absolute; bottom: 1.2rem; left: 50%; translate: -50% 0;
  width: 1px; height: 44px; background: linear-gradient(var(--dim), transparent);
  animation: hintPulse 2.4s ease-in-out infinite; pointer-events: none;
}
@keyframes hintPulse { 0%, 100% { opacity: .15; height: 28px; } 50% { opacity: .6; height: 48px; } }
@media (max-width: 600px) { .scroll-hint { display: none; } }

/* Змейка отключается на мобильных — JS и CSS оба это делают */

/* ─── Секционные заголовки ─── */
.sl { padding-top: var(--gap-y); padding-bottom: clamp(1.2rem, 3vw, 2.5rem);
      font-size: var(--fs-sm); letter-spacing: .18em; scroll-margin-top: 6rem; }
section[id], div[id] { scroll-margin-top: clamp(70px, 12vh, 110px); }

/* ─── SERVICES: авто-колонки ─── */
.services { padding-bottom: var(--gap-y); }
.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr));
  gap: 1px; background: var(--border); border: 1px solid var(--border); border-bottom: 0;
}
.service {
  border: 0 !important; background: var(--bg);
  padding: clamp(1.4rem, 3.5vw, 2.5rem);
  min-height: clamp(200px, 32vw, 260px);
}
.service:hover { background: #060606; }
.service-num { font-size: var(--fs4); margin-bottom: clamp(.8rem, 2vw, 1.5rem); }
.service h3 { font-size: var(--fs3); }
.service p { max-width: 34ch; }
.service-tag { font-size: var(--fs-sm); margin-top: 1.2rem; line-height: 1.6; }

/* ─── STATS ─── */
.stats-bar {
  grid-template-columns: repeat(auto-fit, minmax(min(50%, 180px), 1fr));
  gap: 1px; background: var(--border);
}
.sb { border: 0 !important; background: #040404; padding: clamp(1.6rem, 4vw, 3rem) 1rem; }
.sb .num { font-size: var(--fs5); overflow-wrap: anywhere; }
.sb .label { font-size: var(--fs-sm); }

/* ─── CASES ─── */
.cases { padding-bottom: var(--gap-y); }
.case { gap: clamp(1.5rem, 4vw, 4rem); padding: clamp(2rem, 5vw, 4rem) 0; }
.case-num { font-size: var(--fs4); margin-bottom: 1rem; }
.case-title { font-size: var(--fs3); }
.case-subtitle { font-size: var(--fs-sm); }
.case-right { padding: clamp(1.2rem, 3.5vw, 2.5rem); }
.case-right h4 { font-size: var(--fs-sm); }
.case-metrics { gap: clamp(1rem, 3vw, 2rem); }
.metric .val { font-size: var(--fs3); }
.metric .ml { font-size: var(--fs-sm); }
.case-tech span { font-size: var(--fs-xs); }
@media (max-width: 1024px) {
  .case { grid-template-columns: 1fr; }
  .case-left { position: static; top: auto; }
}

/* ─── MARKET ─── */
.market { padding-block: var(--gap-y); }
.market-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr)); }
.market-card { padding: clamp(1.2rem, 3.5vw, 2.5rem); }
.market-card .mc-label { font-size: var(--fs-sm); margin-bottom: 1rem; }
.market-card .mc-big { font-size: var(--fs4); }
.market-card .mc-sub, .market-card .mc-source { font-size: var(--fs-xs); }
.market-intro { font-size: var(--fs2); margin-bottom: clamp(2rem, 5vw, 4rem); }
.bar-wrap { height: clamp(48px, 10vw, 64px); }
.bar-labels { font-size: var(--fs-xs); }

/* ─── BIG STAT / ABOUT / STACK / CTA ─── */
.big-stat { padding-block: clamp(4rem, 10vw, 8rem); }
.big-stat .bs-text { font-size: var(--fs2); }
.big-stat .bs-source { font-size: var(--fs-xs); }

.about { padding-block: var(--gap-y); gap: clamp(2rem, 5vw, 4rem); }
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; }
  .about-visual { aspect-ratio: 16/9; }
  .about-text p, .about-text .al { max-width: 100%; }
}
.about-text h2 { font-size: var(--fs4); }

.stack { padding-bottom: var(--gap-y); }
.stack-item {
  font-size: var(--fs-sm);
  padding: clamp(.6rem, 2vw, .9rem) clamp(.9rem, 2.5vw, 1.5rem);
  min-height: var(--tap); display: inline-flex; align-items: center;
}

.cta { padding-block: clamp(4.5rem, 12vw, 10rem); }
.cta h2 { font-size: var(--fs6); }
.cta p { font-size: var(--fs2); max-width: 36ch; margin-top: clamp(1.2rem, 3vw, 2.5rem); }
.cta-btn {
  margin-top: clamp(2rem, 5vw, 3.5rem); min-height: var(--tap);
  padding: 1rem clamp(1.6rem, 5vw, 2.8rem);
}
@media (max-width: 520px) { .cta-btn { width: 100%; justify-content: center; } }

footer {
  padding-block: clamp(1.4rem, 4vw, 2rem); gap: .6rem; flex-wrap: wrap;
  font-size: var(--fs-sm);
  padding-bottom: calc(clamp(1.4rem, 4vw, 2rem) + env(safe-area-inset-bottom));
}

/* ─── ELZA: bottom-sheet на мобильных ─── */
.elza-bubble {
  right: max(1.1rem, env(safe-area-inset-right));
  bottom: calc(1.1rem + env(safe-area-inset-bottom));
  width: clamp(52px, 13vw, 58px); height: clamp(52px, 13vw, 58px);
}
@media (max-width: 768px) {
  .elza-chat {
    right: 0; left: 0; bottom: 0; width: 100%;
    max-height: min(85svh, 720px); height: auto; border: 0;
    border-top: 1px solid var(--border); border-radius: 12px 12px 0 0;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .elza-messages { max-height: none; flex: 1; overscroll-behavior: contain; }
}
.elza-input { font-size: 16px; }
.elza-send { min-width: var(--tap); min-height: var(--tap); }
.elza-close { min-width: var(--tap); min-height: var(--tap); }

/* ─── LEAD FORM ─── */
.lead-overlay { padding: 1rem; align-items: center; }
@media (max-width: 640px) {
  .lead-overlay { align-items: flex-end; padding: 0; }
  .lead-form {
    width: 100% !important; max-width: 100% !important;
    border-radius: 12px 12px 0 0; max-height: 92svh;
    padding: 1.4rem 1.2rem calc(1.4rem + env(safe-area-inset-bottom));
    animation: sheetUp .35s cubic-bezier(.16, 1, .3, 1);
  }
  .lead-form .form-row { grid-template-columns: 1fr; }
  .lead-form form > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
}
@keyframes sheetUp { from { transform: translateY(100%); } to { transform: none; } }
.lead-form input, .lead-form select, .lead-form textarea {
  font-size: 16px; min-height: var(--tap); border-radius: var(--r);
}
.lead-form label { font-size: var(--fs-xs); }
.lead-form .submit-btn { min-height: 48px; font-size: 14px; }
.slot-opt { min-height: 52px; display: flex; flex-direction: column; justify-content: center; }
.slot-opt.is-selected { border-color: var(--accent) !important; background: rgba(255, 45, 32, .08) !important; }
.lead-form .close-btn { min-width: var(--tap); min-height: var(--tap);
                        display: flex; align-items: center; justify-content: center; }

/* ─── Доступность ─── */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px;
}
.skip-link {
  position: absolute; left: -9999px; z-index: 10010; padding: .8rem 1.2rem;
  background: var(--accent); color: #fff; text-decoration: none;
}
.skip-link:focus { left: 1rem; top: 1rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ─── Reduced motion и печать ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important; scroll-behavior: auto !important;
  }
  #snake-canvas, .elza-bubble-pulse, .scroll-hint { display: none; }
}
@media (orientation: landscape) and (max-height: 520px) {
  .hero { min-height: auto; padding-top: 5.5rem; padding-bottom: 3rem; }
  nav .links { padding-top: 4.5rem; justify-content: flex-start; overflow-y: auto; }
}
@media print {
  nav, .elza-chat, .elza-bubble, .grid-overlay, .cursor, .cursor-dot,
  #snake-canvas, .lead-overlay { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ─── PORTRAIT mobile (width < height) — компактный режим ─── */
@media (orientation: portrait) and (max-width: 768px) {
  /* Убираем пустоты между секциями */
  .divider { margin: 0; }
  .services { padding-bottom: 2rem; }
  .cases { padding-top: 1rem; padding-bottom: 2rem; }

  /* Stats-bar компактнее */
  .stats-bar { margin-top: 1rem; margin-bottom: 1rem; }
  .sb { padding: 1.2rem 0.6rem; }
  .sb .num { font-size: clamp(28px, 8vw, 44px); }
  .sb .label { font-size: 11px; }

  /* Секционные заголовки ближе к контенту */
  .sl { padding-bottom: 1rem; }

  /* About в одну колонку */
  .about { padding-block: 2rem; gap: 1.5rem; }
  .about-visual { aspect-ratio: 3/4; }

  /* CTA компактнее */
  .cta { padding-block: 3rem; }

  /* Hero без пустот */
  .hero { padding-top: 4rem; padding-bottom: 2rem; }
  .hero h1 { font-size: clamp(36px, 11vw, 72px); }
  .hero-bottom { margin-top: 1rem; }
}