/* ===== HeatCheck landing — brand tokens ===== */
:root {
  --bg: #0a0a0c;
  --surface: #111114;
  --surface-2: #16161a;
  --border: #1f1f24;
  --border-2: #26262b;
  --accent: #ff5a1f;
  --accent-1: #ff7a1a;
  --accent-2: #ffa340;
  --text: #ededf0;
  --text-2: #7c7c84;
  --ok: #5dcaa5;
  --bad: #ff6b6b;

  --r-sm: 10px;
  --r: 14px;
  --r-lg: 18px;
  --maxw: 1120px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background canvas sits behind everything */
#bg-grid {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.6;
  pointer-events: none;
}

img, svg { display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

h1, h2, h3 { font-weight: 800; line-height: 1.15; letter-spacing: -0.01em; margin: 0; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.container.narrow { max-width: 780px; }

.muted { color: var(--text-2); }
.grad {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ok { color: var(--ok); } .bad { color: var(--bad); }

/* Skip link (a11y) */
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 0 0 var(--r-sm) 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 18px; border-radius: var(--r-sm);
  font-weight: 700; font-size: 15px; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.12s ease, filter 0.12s ease, background 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-lg { padding: 14px 24px; font-size: 16px; }
.btn-accent { background: linear-gradient(180deg, var(--accent-1), var(--accent)); color: #fff; box-shadow: 0 8px 24px rgba(255, 90, 31, 0.28); }
.btn-accent:hover { color: #fff; filter: brightness(1.05); }
.btn-ghost { background: var(--surface); border-color: var(--border-2); color: var(--text); }
.btn-ghost:hover { color: var(--text); border-color: #3a3a42; }

.pill {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--accent-2);
  background: rgba(255, 90, 31, 0.1); border: 1px solid rgba(255, 90, 31, 0.25);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  background: rgba(10, 10, 12, 0.72);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-logo {
  width: 36px; height: 36px; display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border-2); border-radius: var(--r-sm);
}
.brand-word { font-weight: 800; font-size: 18px; letter-spacing: 0.3px; color: #fff; }
.brand-word span { color: var(--accent); }
.brand-word.small { font-size: 16px; }
.nav { margin-left: auto; display: flex; gap: 26px; }
.nav a { color: var(--text-2); font-weight: 600; font-size: 15px; }
.nav a:hover { color: var(--text); }
.header-cta { margin-left: 8px; }

/* ===== Hero ===== */
.hero { padding: 72px 0 40px; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.hero-title { font-size: clamp(34px, 5vw, 56px); }
.hero-sub { color: var(--text-2); font-size: 18px; max-width: 560px; margin: 20px 0 28px; }
.hero-sub strong { color: var(--text); }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 20px; color: var(--text-2); font-size: 13px; }

/* Hero mockup card */
.hero-mock { perspective: 1200px; }
.mock-card {
  background: linear-gradient(180deg, var(--surface), #0e0e11);
  border: 1px solid var(--border); border-radius: var(--r-lg); padding: 16px;
  box-shadow: var(--shadow); transform: rotateY(-6deg) rotateX(3deg);
}
.mock-row { display: flex; align-items: center; gap: 10px; padding: 6px 4px 14px; flex-wrap: wrap; }
.mock-flag { font-size: 16px; }
.mock-avatar { width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(135deg, #23232b, #14141a); border: 1px solid var(--border-2); }
.mock-nick { font-weight: 700; color: var(--accent); }
.mock-badge {
  font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 6px; color: #fff;
  background: #1f8a4c; border: 1px solid #27b562;
}
.mock-badge.up { background: #1f8a4c; border-color: #27b562; }
.mock-elo { margin-left: auto; color: var(--text-2); font-weight: 700; }
.mock-lvl { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: #241a10; border: 2px solid var(--accent); color: var(--accent-2); font-weight: 800; font-size: 13px; }
.mock-panel {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px;
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--r); padding: 12px 14px;
}
.mcell { display: flex; flex-direction: column; }
.mcell b { font-size: 14px; font-weight: 700; color: #fff; }
.mcell i { font-style: normal; font-size: 9px; letter-spacing: 0.6px; text-transform: uppercase; color: var(--text-2); }
.mcell.wl b { display: inline-flex; gap: 3px; }
.mcell.wl .w { color: var(--ok); } .mcell.wl .l { color: var(--bad); }
.mock-odds { display: flex; align-items: center; gap: 10px; margin-top: 12px; padding: 8px 12px; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--r); }
.mock-odds .cap { font-size: 10px; font-weight: 800; letter-spacing: 1px; color: var(--text-2); }
.mock-odds .side { font-weight: 800; font-size: 14px; color: var(--text-2); min-width: 40px; text-align: center; }
.mock-odds .side.fav { color: var(--accent-2); }
.mock-odds .track { flex: 1; height: 7px; border-radius: 999px; background: #2c6cff33; overflow: hidden; position: relative; }
.mock-odds .fill { position: absolute; inset: 0 auto 0 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 999px; }

/* ===== Sections ===== */
.section { padding: 64px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); }
.section-sub { color: var(--text-2); font-size: 17px; margin-top: 10px; }

.cards { display: grid; gap: 18px; }
.features-grid { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 22px; transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--border-2); transform: translateY(-3px); }
.card-ico {
  width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--r-sm);
  color: var(--accent); background: rgba(255, 90, 31, 0.1); border: 1px solid rgba(255, 90, 31, 0.22); margin-bottom: 14px;
}
.card-ico svg { width: 24px; height: 24px; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 14.5px; margin: 0; }

/* ===== Install ===== */
.install-grid { grid-template-columns: repeat(4, 1fr); }
.install-card {
  position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 26px 18px 20px; color: var(--text); transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.install-card:hover { color: var(--text); transform: translateY(-3px); border-color: var(--border-2); }
.install-card.recommended { border-color: var(--accent); box-shadow: 0 10px 30px rgba(255, 90, 31, 0.16); }
.browser-ico { margin-bottom: 6px; color: var(--text); line-height: 0; }
.browser-ico svg { width: 42px; height: 42px; }
.install-card:hover .browser-ico { color: #fff; }
.install-card.recommended .browser-ico { color: var(--accent-2); }
.browser-name { font-weight: 800; font-size: 18px; }
.install-hint { font-size: 11.5px; color: var(--text-2); }
.install-state { font-weight: 700; font-size: 13px; margin-top: 6px; }
/* Active install → real gradient pill button */
.install-card.available .install-state {
  margin-top: 12px;
  padding: 9px 20px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(180deg, var(--accent-1), var(--accent));
  box-shadow: 0 6px 18px rgba(255, 90, 31, 0.28);
  transition: transform 0.14s ease, box-shadow 0.14s ease, filter 0.14s ease;
}
.install-card.available .install-state::after { content: 'Установить →'; }
.install-card.available:hover {
  border-color: rgba(255, 90, 31, 0.5);
  box-shadow: 0 12px 34px rgba(255, 90, 31, 0.16);
}
.install-card.available:hover .install-state {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(255, 90, 31, 0.45);
}
.install-card.available:hover .browser-ico { color: var(--accent-2); }
.install-card.soon { opacity: 0.85; cursor: not-allowed; }
.install-card.soon .install-state {
  color: var(--ok); background: rgba(93, 202, 165, 0.12); border: 1px solid rgba(93, 202, 165, 0.3);
  padding: 3px 10px; border-radius: 999px;
}
.install-card.soon .install-state::after { content: 'Скоро · Coming soon'; }
.rec-badge {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  font-size: 11px; font-weight: 800; white-space: nowrap;
  background: var(--accent); color: #fff; padding: 3px 10px; border-radius: 999px;
}
.install-foot { text-align: center; color: var(--text-2); margin-top: 26px; }

/* ===== FAQ ===== */
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 4px 18px; margin-bottom: 12px;
}
.faq details[open] { border-color: var(--border-2); }
.faq summary {
  list-style: none; cursor: pointer; font-weight: 700; font-size: 16px;
  padding: 16px 0; display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+'; color: var(--accent); font-size: 22px; font-weight: 700; line-height: 1; transition: transform 0.2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq-body { padding: 0 0 16px; color: var(--text-2); }
.faq-body p { margin: 0 0 10px; }
.faq-body ol { margin: 8px 0 0; padding-left: 20px; }
.faq-body li { margin-bottom: 6px; }
.faq-body code { background: var(--surface-2); border: 1px solid var(--border-2); padding: 1px 6px; border-radius: 5px; font-size: 13px; }

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 40px 0 30px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.footer-brand .muted { margin: 8px 0 0; max-width: 320px; font-size: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.footer-links a { color: var(--text-2); font-weight: 600; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom .muted, .disclaimer { font-size: 12.5px; margin: 0; }
.disclaimer { color: #55555c; max-width: 460px; }

/* ===== Scroll reveal ===== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 34px; }
  .hero-mock { order: 2; }
  .mock-card { transform: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .install-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
}
@media (max-width: 560px) {
  .hero { padding: 46px 0 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .mock-panel { grid-template-columns: repeat(3, 1fr); }
  .footer-links { align-items: flex-start; }
  .header-cta { display: none; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .install-card:hover { transform: none; }
}