/* ==========================================================================
   NaveStudio — сайт. Цвета взяты из лаунчера (тёмно-красная тема).
   ========================================================================== */

:root {
  --bg: #17060A;
  --bg-2: #22090F;
  --bg-3: #2c0d15;
  --panel: rgba(var(--panel-rgb), .55);
  --border: rgba(255, 255, 255, .08);
  --border-soft: rgba(255, 255, 255, .05);
  --text: #f5eef0;
  --text-dim: #c9b8bd;
  --text-dim-2: #8f7d82;
  --accent: #c8102e;
  --accent-hover: #e8344f;
  --accent-soft: rgba(var(--accent-rgb), .18);
  --gold: #e8b45c;
  --radius: 18px;
  --radius-sm: 10px;
  --accent-rgb: 200, 16, 46;
  --gold-rgb: 232, 180, 92;
  --panel-rgb: 44, 13, 21;
  --header-bg: rgba(23, 6, 10, .72);
  --demo-bg: rgba(10, 3, 6, .7);
  --demo-dot: #5a2a33;
  --soft-text: #ffb3bf;
  --gold-light: #ffdc9e;
  --grad-1: #ff5a72;
  --on-accent: #fff;
  --on-gold: #1a0508;
  --ok: #7bd88f;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
code {
  background: rgba(255, 255, 255, .08);
  padding: 1px 6px; border-radius: 6px; font-size: .92em;
}

/* ---------- фон ---------- */
#bg {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: -2; pointer-events: none;
}
.bg-glow {
  position: fixed; inset: -20%; z-index: -3; pointer-events: none;
  background:
    radial-gradient(40% 40% at 20% 20%, rgba(var(--accent-rgb), .28), transparent 70%),
    radial-gradient(35% 35% at 80% 70%, rgba(var(--gold-rgb), .12), transparent 70%);
  animation: drift 18s var(--ease) infinite alternate;
}
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-4%, 3%) scale(1.08); }
}

/* ---------- шапка ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 14px clamp(16px, 4vw, 48px);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-logo { width: 34px; height: 34px; border-radius: 9px; }
.brand-name { letter-spacing: .3px; }

.tabs { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.tab {
  position: relative;
  padding: 8px 14px; border-radius: 999px;
  color: var(--text-dim); font-size: 14.5px; font-weight: 500;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.tab:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.tab.active { color: var(--text); background: var(--accent-soft); }
.tab.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; border-radius: 2px; background: var(--accent-hover);
}
.tab-accent { color: var(--gold); }
.tab-accent.active { background: rgba(var(--gold-rgb), .14); color: var(--gold-light); }
.tab-accent.active::after { background: var(--gold); }

.burger {
  display: none; margin-left: auto;
  width: 42px; height: 42px; border: 1px solid var(--border);
  border-radius: 10px; background: transparent; cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.burger span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s var(--ease); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- страницы (вкладки) ---------- */
main { min-height: 70vh; }
.page {
  display: none;
  max-width: 1120px; margin: 0 auto;
  padding: clamp(40px, 7vw, 80px) clamp(16px, 4vw, 40px) 60px;
  animation: pageIn .55s var(--ease);
}
.page.active { display: block; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- общие элементы ---------- */
.eyebrow {
  display: inline-block; margin: 0 0 12px;
  padding: 5px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--soft-text);
  font-size: 12.5px; font-weight: 600; letter-spacing: .6px; text-transform: uppercase;
}
.lead { color: var(--text-dim); font-size: 1.1rem; max-width: 640px; }
.muted { color: var(--text-dim-2); }
.fine { font-size: 13px; color: var(--text-dim-2); margin-top: 14px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 12px; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.12rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px;
  border: 1px solid var(--border); background: rgba(255, 255, 255, .04);
  color: var(--text); font: inherit; font-weight: 600; font-size: 15px;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); background: rgba(255, 255, 255, .09); }
.btn-primary {
  background: linear-gradient(180deg, var(--accent-hover), var(--accent));
  border-color: transparent; color: var(--on-accent);
  box-shadow: 0 10px 30px rgba(var(--accent-rgb), .35);
}
.btn-primary:hover { box-shadow: 0 14px 40px rgba(var(--accent-rgb), .5); background: linear-gradient(180deg, var(--accent-hover), var(--accent)); }
.btn-big { padding: 16px 30px; font-size: 16.5px; margin-top: 8px; }
.btn-small { padding: 8px 14px; font-size: 13.5px; margin-top: 14px; }

.card, .side-card, .step, .download-card, .cta, .support-card, .help-cta, details, .stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
}

/* ---------- ГЛАВНАЯ ---------- */
.hero { text-align: center; padding: clamp(20px, 5vw, 60px) 0 40px; }
.hero-title { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; letter-spacing: -.5px; margin-bottom: 18px; }
.grad {
  background: linear-gradient(90deg, var(--grad-1), var(--gold), var(--grad-1));
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }
.hero-sub { max-width: 620px; margin: 0 auto 30px; color: var(--text-dim); font-size: 1.12rem; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* демонстрация работы лаунчера */
.demo {
  max-width: 720px; margin: 48px auto 0; text-align: left;
  background: var(--demo-bg);
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}
.demo-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px; background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid var(--border-soft);
}
.demo-bar span { width: 11px; height: 11px; border-radius: 50%; background: var(--demo-dot); }
.demo-bar span:first-child { background: var(--accent); }
.demo-bar em { margin-left: auto; font-style: normal; font-size: 12.5px; color: var(--text-dim-2); }
.demo-body {
  padding: 18px 20px; min-height: 170px;
  font-family: Consolas, "Courier New", monospace; font-size: 14px; color: var(--text-dim);
}
.demo-body div { margin: 3px 0; white-space: pre-wrap; }
.demo-body .ok { color: var(--ok); }
.demo-body .warn { color: var(--gold); }
.demo-body .cur::after { content: "▋"; color: var(--accent-hover); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.demo-progress { height: 4px; background: rgba(255, 255, 255, .06); }
.demo-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transition: width .4s var(--ease);
}

.features {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin-top: 40px;
}
.card { padding: 26px; transition: transform .3s var(--ease), border-color .3s; }
.card:hover { transform: translateY(-5px); border-color: rgba(var(--accent-rgb), .45); }
.card-icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center; font-size: 22px;
  background: var(--accent-soft); margin-bottom: 14px;
}
.card p { color: var(--text-dim); margin: 0; font-size: 15px; }

.cta {
  margin-top: 56px; padding: clamp(28px, 5vw, 48px); text-align: center;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), .22), rgba(var(--panel-rgb), .6));
}
.cta p { color: var(--text-dim); margin: 0 0 22px; }

/* ---------- страницы: шапка ---------- */
.page-head { margin-bottom: 40px; }
.page-head h1 { margin-bottom: 10px; }

/* ---------- О НАС ---------- */
.two-col { display: grid; gap: 28px; grid-template-columns: 1.6fr 1fr; align-items: start; }
.prose p { color: var(--text-dim); font-size: 1.05rem; }
.prose h2 { margin-top: 28px; }
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li { position: relative; padding: 6px 0 6px 28px; color: var(--text-dim); }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 6px;
  width: 18px; height: 18px; border-radius: 50%;
  display: grid; place-items: center; font-size: 11px; font-weight: 700;
  background: var(--accent-soft); color: var(--soft-text);
}
.side-card { padding: 26px; }
.member { display: flex; align-items: center; gap: 14px; margin: 16px 0; }
.member strong { display: block; }
.member span { font-size: 14px; color: var(--text-dim-2); }
.avatar {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 20px;
  background: linear-gradient(135deg, var(--accent-hover), var(--gold)); color: var(--on-gold);
}
.stats { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin-top: 48px; }
.stat { padding: 26px; text-align: center; }
.stat strong { display: block; font-size: 2.2rem; color: var(--gold); line-height: 1.1; }
.stat span { color: var(--text-dim-2); font-size: 14px; }

/* ---------- адаптив ---------- */
@media (max-width: 900px) {
  .burger { display: flex; }
  .site-header { flex-wrap: wrap; }
  .tabs {
    display: none; width: 100%; flex-direction: column; gap: 2px;
    padding: 8px 0 4px; margin: 0;
  }
  .tabs.open { display: flex; }
  .tab { padding: 12px 14px; }
  .tab.active::after { display: none; }
  .two-col, .download-card { grid-template-columns: 1fr; }
  .features, .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .features, .steps, .stats, .support-grid { grid-template-columns: 1fr; }
  .demo-body { font-size: 12px; }
  .hero-actions .btn { width: 100%; }
}

/* ---------- появление блоков при прокрутке ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  filter: blur(6px);
  transition: opacity .8s var(--ease), transform .8s var(--ease), filter .8s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; filter: none; }

/* ---------- скачивание ---------- */
.download-card {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px;
  padding: 34px; margin-top: 12px;
}
.download-info h2 { font-size: 1.6rem; margin: 0 0 6px; }
.download-req h3 { margin-top: 0; }
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px;
}
.step { padding: 22px; }
.step span {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  border-radius: 50%; background: var(--accent-soft); color: var(--accent-hover);
  font-weight: 700; margin-bottom: 10px;
}
.step h3 { margin: 4px 0 6px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

/* ---------- помощь ---------- */
.faq { display: grid; gap: 12px; max-width: 820px; margin: 0 auto; }
.faq details { padding: 4px 20px; }
.faq summary {
  cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; color: var(--accent-hover); font-size: 22px; line-height: 1;
  transition: transform .25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details[open] p {
  animation: faqOpen .65s var(--ease);
}
@keyframes faqOpen {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: none; }
}
.help-cta { margin: 48px auto 0; max-width: 620px; padding: 30px; text-align: center; }
.help-cta h2 { margin-top: 0; }

/* ---------- поддержка ---------- */
.support-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.support-card {
  display: flex; flex-direction: column; padding: 28px;
  transition: opacity .16s var(--ease), filter .8s var(--ease), transform .25s var(--ease), border-color .25s;
}
.support-card.reveal { transform: none; }
/* после появления — быстрый hover, без задержки */
.support-card.in:hover {
  transition: transform .25s var(--ease), border-color .25s;
}
.support-card:hover { transform: translateY(-4px); border-color: rgba(var(--gold-rgb), .4); }
.support-card h3 { margin: 4px 0 8px; }
.support-card p { color: var(--text-dim); margin: 0 0 4px; flex: 1; }

/* ---------- соцсети и футер ---------- */
.socials { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.social-link {
  padding: 9px 16px; border-radius: 999px; font-size: 14px; font-weight: 600;
  border: 1px solid var(--border); background: rgba(255, 255, 255, .04);
  transition: background .2s, border-color .2s, transform .2s var(--ease);
}
.social-link:hover { transform: translateY(-2px); border-color: var(--accent-hover); background: var(--accent-soft); }
.site-footer {
  text-align: center; padding: 36px 20px 44px; color: var(--text-dim-2);
  border-top: 1px solid var(--border-soft); font-size: 13.5px; display: grid; gap: 18px;
}
.site-footer p { margin: 0; }

@media (max-width: 900px) {
  .download-card { padding: 24px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .support-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   СЕЗОННЫЕ ТЕМЫ. Тема ставится атрибутом <html data-theme="winter">.
   Чтобы поменять цвета темы — правь значения в её блоке.
   ========================================================================== */
html[data-theme] body,
html[data-theme] .site-header,
html[data-theme] .bg-glow { transition: background-color .6s var(--ease), color .6s var(--ease); }
#bg { transition: opacity .35s var(--ease); }

/* ❄ ЗИМА — голубой и белый */
html[data-theme="winter"] {
  --bg: #071422; --bg-2: #0b1d30; --bg-3: #10263d;
  --panel-rgb: 16, 40, 64;
  --text: #eef6ff; --text-dim: #b8cde0; --text-dim-2: #7f97ad;
  --accent: #3a9be8; --accent-hover: #6cc0ff; --accent-rgb: 58, 155, 232;
  --gold: #e6f4ff; --gold-rgb: 230, 244, 255; --gold-light: #ffffff;
  --header-bg: rgba(7, 20, 34, .72); --demo-bg: rgba(3, 10, 18, .7); --demo-dot: #2a4a66;
  --soft-text: #bfe3ff; --grad-1: #8fd3ff; --on-gold: #071422;
}

/* 🌸 ВЕСНА — зелёный и розовый */
html[data-theme="spring"] {
  --bg: #0c1a12; --bg-2: #11241a; --bg-3: #173022;
  --panel-rgb: 24, 48, 34;
  --text: #f6fff8; --text-dim: #c4dccb; --text-dim-2: #87a291;
  --accent: #e8508a; --accent-hover: #ff7aac; --accent-rgb: 232, 80, 138;
  --gold: #7ddc8f; --gold-rgb: 125, 220, 143; --gold-light: #b8f5c4;
  --header-bg: rgba(12, 26, 18, .72); --demo-bg: rgba(5, 12, 8, .7); --demo-dot: #3a5a45;
  --soft-text: #ffc2d9; --grad-1: #ff8fb8; --on-gold: #0c1a12;
}

/* ☀ ЛЕТО — жёлтый и оранжевый на синем */
html[data-theme="summer"] {
  --bg: #06223d; --bg-2: #0a2c4d; --bg-3: #0e365c;
  --panel-rgb: 10, 44, 77;
  --text: #fffaf0; --text-dim: #d6e3ee; --text-dim-2: #8fa9c0;
  --accent: #ff8a1f; --accent-hover: #ffaa4d; --accent-rgb: 255, 138, 31;
  --gold: #ffd23f; --gold-rgb: 255, 210, 63; --gold-light: #ffe891;
  --header-bg: rgba(6, 34, 61, .72); --demo-bg: rgba(2, 14, 28, .7); --demo-dot: #2c5378;
  --soft-text: #ffd9a8; --grad-1: #ffb347; --on-gold: #06223d; --on-accent: #1d0f00;
}

/* 🍁 ОСЕНЬ — красно-оранжевый */
html[data-theme="autumn"] {
  --bg: #1a0a04; --bg-2: #261007; --bg-3: #32160a;
  --panel-rgb: 50, 22, 10;
  --text: #fff4ea; --text-dim: #e0c4ad; --text-dim-2: #a3826b;
  --accent: #e0531f; --accent-hover: #ff7a3d; --accent-rgb: 224, 83, 31;
  --gold: #f2a33a; --gold-rgb: 242, 163, 58; --gold-light: #ffd08a;
  --header-bg: rgba(26, 10, 4, .72); --demo-bg: rgba(12, 4, 1, .7); --demo-dot: #5e3220;
  --soft-text: #ffc59e; --grad-1: #ff8a4c; --on-gold: #1a0a04;
}

/* свечение фона берёт цвета текущей темы */
html[data-theme] .bg-glow {
  background:
    radial-gradient(40% 40% at 20% 20%, rgba(var(--accent-rgb), .26), transparent 70%),
    radial-gradient(35% 35% at 80% 70%, rgba(var(--gold-rgb), .12), transparent 70%);
}
html[data-theme="summer"] .bg-glow {
  background:
    radial-gradient(45% 40% at 80% 15%, rgba(255, 200, 80, .22), transparent 70%),
    radial-gradient(60% 40% at 50% 100%, rgba(40, 140, 230, .3), transparent 70%);
}

/* ---------- переключатель тем (кнопка в правом нижнем углу) ---------- */
.theme-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  width: 52px; height: 52px; border-radius: 50%;
  border: 1px solid var(--border); cursor: pointer;
  background: rgba(var(--panel-rgb), .85); backdrop-filter: blur(10px);
  font-size: 24px; line-height: 1; color: var(--text);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .35);
  transition: transform .25s var(--ease), border-color .25s;
}
.theme-fab:hover { transform: translateY(-2px) rotate(-12deg); border-color: var(--accent-hover); }
.theme-panel {
  position: fixed; right: 20px; bottom: 84px; z-index: 60;
  width: 220px; padding: 10px;
  background: rgba(var(--panel-rgb), .92); backdrop-filter: blur(14px);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
  animation: panelIn .25s var(--ease);
}
.theme-panel[hidden] { display: none !important; }
@keyframes panelIn { from { opacity: 0; transform: translateY(8px) scale(.97); } to { opacity: 1; transform: none; } }
.theme-panel h4 { margin: 4px 8px 8px; font-size: 13px; color: var(--text-dim-2); text-transform: uppercase; letter-spacing: .6px; }
.theme-opt {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border: 0; border-radius: 10px; cursor: pointer;
  background: transparent; color: var(--text); font: inherit; font-size: 14.5px; text-align: left;
}
.theme-opt:hover { background: rgba(255, 255, 255, .06); }
.theme-opt.active { background: rgba(var(--accent-rgb), .2); }
.theme-opt .sw { width: 22px; height: 22px; border-radius: 50%; flex: none; border: 1px solid rgba(255, 255, 255, .25); }
.sw-auto    { background: conic-gradient(#6cc0ff 0 25%, #ff7aac 0 50%, #ffd23f 0 75%, #ff7a3d 0); }
.sw-classic { background: linear-gradient(135deg, #c8102e, #e8b45c); }
.sw-winter  { background: linear-gradient(135deg, #3a9be8, #e6f4ff); }
.sw-spring  { background: linear-gradient(135deg, #e8508a, #7ddc8f); }
.sw-summer  { background: linear-gradient(135deg, #ffd23f, #ff8a1f 55%, #0a2c4d 56%); }
.sw-autumn  { background: linear-gradient(135deg, #e0531f, #f2a33a); }

@media (max-width: 560px) {
  .theme-fab { right: 14px; bottom: 14px; width: 46px; height: 46px; font-size: 21px; }
  .theme-panel { right: 14px; bottom: 70px; }
}

/* ---------- уважение к настройкам «уменьшить анимацию» ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  #bg { display: none; }
  .reveal { opacity: 1; transform: none; filter: none; }
}