/* =============================================================
   SupportHub — Base: reset, typography, layout, buttons, utils
   ============================================================= */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; max-width: 100%; overflow-x: hidden; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 680px at 78% -8%, rgba(82,119,226,0.16), transparent 60%),
    radial-gradient(900px 600px at 8% 6%, rgba(123,151,238,0.08), transparent 55%),
    radial-gradient(1200px 900px at 50% 120%, rgba(58,87,184,0.10), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  max-width: 100%;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
button, input, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--brand); color: #fff; }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(48px, 7vh, 84px); }

/* ---- Typography scale ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand-bright);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--brand), transparent);
}
.eyebrow--center::before { display: none; }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); font-weight: 620; letter-spacing: -0.035em; }
.h2 { font-size: clamp(2rem, 4.4vw, 3.1rem); letter-spacing: -0.03em; }
.h3 { font-size: clamp(1.35rem, 2.4vw, 1.85rem); letter-spacing: -0.02em; }
.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.55;
  color: var(--text-muted);
  text-wrap: pretty;
}
.section-head { max-width: 720px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head .h2 { margin-top: 18px; }
.section-head .lede { margin-top: 18px; }

.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }
.mono { font-family: var(--font-mono); }
.accent { color: var(--brand-bright); }

/* ---- Buttons ---- */
.btn {
  --bg-btn: transparent;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: var(--r-input);
  border: 1px solid transparent;
  background: var(--bg-btn);
  font-weight: 540;
  font-size: 15.5px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.25s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn:focus-visible { outline: 2px solid var(--brand-bright); outline-offset: 2px; }

.btn--primary {
  --bg-btn: var(--brand);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,0.14) inset, var(--shadow-brand);
}
.btn--primary:hover { --bg-btn: var(--brand-bright); transform: translateY(-1px); }
.btn--ghost {
  --bg-btn: var(--bg-elev);
  border-color: var(--stroke-strong);
  color: var(--text);
}
.btn--ghost:hover { --bg-btn: var(--bg-hover); border-color: var(--brand); transform: translateY(-1px); }
.btn--lg { padding: 16px 28px; font-size: 16.5px; }
.btn--block { width: 100%; }

/* ---- Surfaces ---- */
.card {
  background:
    linear-gradient(180deg, var(--hairline-top), transparent 64px),
    var(--bg-elev);
  border: 1px solid var(--stroke);
  border-radius: var(--r-card);
}
.panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), transparent 46%), var(--bg-elev);
  border: 1px solid var(--stroke);
  border-radius: var(--r-card);
  box-shadow: inset 0 1px 0 var(--hairline-top);
}

/* Shared luminous top edge for elevated surfaces (premium depth, not flat) */
.step-card, .seg-card, .more-card, .kpi, .dash-panel, .channel-pill,
.preset-btn, .showcase-tab, .aihealth, .aihealth__cell, .hero__badge, .chip {
  box-shadow: inset 0 1px 0 var(--hairline-top);
}

/* ---- Chips / badges ---- */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 13px;
  border-radius: var(--r-pill);
  background: var(--bg-elev-2);
  border: 1px solid var(--stroke);
  font-size: 13.5px;
  color: var(--text-muted);
  white-space: nowrap;
}
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  padding: 4px 9px;
  border-radius: 7px;
}

/* ---- Background atmospherics ---- */
.glow {
  position: absolute; pointer-events: none; z-index: 0;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  background: radial-gradient(circle, var(--brand-glow), transparent 70%);
}
.grid-texture {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--stroke) 1px, transparent 1px),
    linear-gradient(90deg, var(--stroke) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: 0.6;
}

/* ---- Reveal on scroll ---- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ---- Light section ---- */
.section--light {
  background: var(--light-bg);
  color: var(--light-text);
}
.section--light .lede { color: var(--light-muted); }
.section--light .eyebrow { color: var(--brand-deep); }
.section--light .card { background: var(--light-bg-2); border-color: var(--light-stroke); box-shadow: 0 1px 2px rgba(12,14,22,0.04); }
.section--light .chip { background: #fff; border-color: var(--light-stroke); color: var(--light-muted); }

/* ---- Helpers ---- */
.flow > * + * { margin-top: var(--flow, 1rem); }
.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }
.wrap { flex-wrap: wrap; }
.gap-sm { gap: 10px; } .gap { gap: 16px; } .gap-lg { gap: 24px; }
.center { text-align: center; }
.hide-mobile { }
@media (max-width: 720px) { .hide-mobile { display: none !important; } }

/* ---- Космо-фон (глобальный звёздный слой за всем контентом) ---- */
.space-bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.space-bg__canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

/* AI-боты-планеты: маленькая сфера с «глазом», наклонным кольцом и спутником.
   Двигаются по вертикали из JS (параллакс при скролле). */
.space-bots { position: absolute; inset: 0; }
.space-bot {
  position: absolute; top: 0; left: var(--bx, 50%);
  width: var(--bs, 90px); height: var(--bs, 90px);
  opacity: 0.85; will-change: transform;
}
.space-bot--a { --bx: 7%;  --bs: 94px; }
.space-bot--b { --bx: 80%; --bs: 124px; }
.space-bot--c { --bx: 16%; --bs: 72px; }
.space-bot--d { --bx: 74%; --bs: 84px; }
.space-bot__core {
  position: absolute; inset: 14%; border-radius: 50%;
  background: radial-gradient(circle at 36% 30%, #2B3559, #161D33 58%, #0B0F1C);
  border: 1px solid rgba(160,180,240,0.14);
  box-shadow: inset -9px -7px 18px rgba(0,0,0,0.6), inset 7px 6px 16px rgba(123,151,238,0.16), 0 0 34px rgba(82,119,226,0.18);
}
.space-bot__eye {
  position: absolute; left: 50%; top: 47%; width: 24%; height: 24%;
  transform: translate(-50%, -50%); border-radius: 50%;
  background: radial-gradient(circle at 45% 40%, #d6e4ff, var(--brand-bright) 48%, var(--brand));
  box-shadow: 0 0 10px var(--brand-glow), 0 0 22px rgba(82,119,226,0.5);
  animation: bot-eye 3.4s var(--ease) infinite;
}
.space-bot__ring {
  position: absolute; left: -16%; right: -16%; top: 50%; height: 42%;
  transform: translateY(-50%) rotate(-20deg); border-radius: 50%;
  border: 1px solid rgba(140,165,235,0.32);
}
.space-bot__orbit {
  position: absolute; inset: -8%; border-radius: 50%;
  animation: bot-orbit 11s linear infinite;
}
.space-bot__moon {
  position: absolute; top: -2px; left: 50%; width: 6px; height: 6px; transform: translateX(-50%);
  border-radius: 50%; background: #d6e4ff; box-shadow: 0 0 8px rgba(214,228,255,0.85);
}
@keyframes bot-eye { 0%, 100% { opacity: 0.8; transform: translate(-50%, -50%) scale(0.92); } 50% { opacity: 1; transform: translate(-50%, -50%) scale(1.06); box-shadow: 0 0 16px var(--brand-glow), 0 0 30px rgba(82,119,226,0.6); } }
@keyframes bot-orbit { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .space-bot__eye, .space-bot__orbit { animation: none; }
}
@media (max-width: 720px) {
  .space-bot--b, .space-bot--d { display: none; }
  .space-bot { --bs: 70px; }
}