/* ============================================================
   Игорь Спиридонов · Senior Backend / Архитектор .NET
   Стиль qummy: deep ink + orange, три темы + переключалка.
   ============================================================ */

/* ---------- Темы (переключаются через data-theme на <html>) ---------- */
:root, html[data-theme="light"] {
  --bg: #f4f6fc;
  --bg2: #ffffff;
  --card: #ffffff;
  --card-alt: linear-gradient(165deg, #ffffff, #f6f8ff);
  --line: #e4e8f3;
  --text: #17233b;
  --strong: #0a1133;
  --muted: #5b6489;
  --accent: #ff8a3d;
  --accent-soft: #ffb866;
  --accent-2: #1f4cc7;
  --accent-3: #6c5cff;
  --panel: linear-gradient(165deg, #0b1437, #142055);
  --panel-2: linear-gradient(165deg, #10204f, #0b1437);
  --panel-text: #ffffff;
  --chip-bg: rgba(11, 20, 55, .05);
  --chip-line: var(--line);
  --nav-bg: rgba(255, 255, 255, .8);
  --orb-1: #6aa3ff; --orb-2: #ff8a3d; --orb-3: #6c5cff; --orb-op: .30;
  --shadow: 0 24px 80px -32px rgba(11, 20, 55, .28);
  --shadow-soft: 0 8px 32px -12px rgba(11, 20, 55, .14);
}

html[data-theme="dark"] {
  --bg: #070b1e;
  --bg2: #0b1023;
  --card: #111834;
  --card-alt: linear-gradient(165deg, #141c3e, #0e1430);
  --line: #232b4d;
  --text: #e7ebfb;
  --strong: #ffffff;
  --muted: #97a1c8;
  --accent: #ff9a52;
  --accent-soft: #ffc38a;
  --accent-2: #5b8cff;
  --accent-3: #8f7bff;
  --panel: linear-gradient(165deg, #1a2350, #0d1533);
  --panel-2: linear-gradient(165deg, #10204f, #0b1437);
  --panel-text: #ffffff;
  --chip-bg: rgba(255, 255, 255, .06);
  --chip-line: #2a3358;
  --nav-bg: rgba(9, 13, 32, .78);
  --orb-1: #2c4fa0; --orb-2: #8a4416; --orb-3: #3b2f7a; --orb-op: .5;
  --shadow: 0 24px 80px -30px rgba(0, 0, 0, .7);
  --shadow-soft: 0 10px 34px -14px rgba(0, 0, 0, .6);
}

html[data-theme="neon"] {
  --bg: #05070d;
  --bg2: #080b14;
  --card: #0c1120;
  --card-alt: linear-gradient(165deg, #0e1526, #080d18);
  --line: #16233c;
  --text: #c9f3e8;
  --strong: #eafff9;
  --muted: #6f93a0;
  --accent: #34e0c0;
  --accent-soft: #7ef2d8;
  --accent-2: #2bd4ff;
  --accent-3: #8affc1;
  --panel: linear-gradient(165deg, #0a1c30, #061120);
  --panel-2: linear-gradient(165deg, #0b2237, #061120);
  --panel-text: #eafff9;
  --chip-bg: rgba(52, 224, 192, .08);
  --chip-line: #16394a;
  --nav-bg: rgba(5, 9, 16, .82);
  --orb-1: #0f6f6a; --orb-2: #155e7a; --orb-3: #1a7a55; --orb-op: .42;
  --shadow: 0 24px 80px -30px rgba(0, 0, 0, .8);
  --shadow-soft: 0 10px 34px -14px rgba(0, 0, 0, .65);
}

:root {
  --radius-lg: 22px;
  --radius-md: 14px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 16px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  transition: background .5s var(--ease), color .5s var(--ease);
}
.mono { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ---------- Фоновые орбы ---------- */
.bg-orbs { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: var(--orb-op); animation: orbFloat 22s ease-in-out infinite; transition: opacity .6s ease; }
.orb-1 { width: 520px; height: 520px; background: radial-gradient(circle, var(--orb-1) 0%, transparent 70%); top: -120px; left: -100px; }
.orb-2 { width: 600px; height: 600px; background: radial-gradient(circle, var(--orb-2) 0%, transparent 70%); bottom: -180px; right: -160px; animation-delay: -8s; }
.orb-3 { width: 420px; height: 420px; background: radial-gradient(circle, var(--orb-3) 0%, transparent 70%); top: 32%; left: 58%; animation-delay: -14s; }
@keyframes orbFloat {
  0%, 100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(40px,-30px) scale(1.08); }
  66% { transform: translate(-30px,40px) scale(.95); }
}

/* ---------- Навигация ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: 56px; padding: 0 18px 0 24px;
  display: flex; align-items: center; gap: 18px;
  background: var(--nav-bg);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 50;
  transition: background .5s var(--ease), border-color .5s var(--ease);
}
.nav-counter { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--muted); font-size: 14px; min-width: 44px; }
.nav-counter-sep { margin: 0 4px; opacity: .5; }
#slide-current { color: var(--accent); }
.nav-progress { flex: 1; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.nav-progress-bar { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent-2), var(--accent-3), var(--accent)); transition: width .6s var(--ease); border-radius: 2px; }
.nav-brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; font-weight: 800; letter-spacing: -.02em; font-size: 15px; color: var(--strong); }
.nav-brand .mono-dot { color: var(--accent); }
.nav-brand b { background: linear-gradient(120deg, var(--accent), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* переключалка тем */
.theme-switch { display: flex; gap: 2px; padding: 3px; border-radius: 999px; background: var(--chip-bg); border: 1px solid var(--line); flex-shrink: 0; }
.theme-switch button {
  width: 30px; height: 26px; border: none; background: transparent; cursor: pointer;
  border-radius: 999px; font-size: 13px; line-height: 1; color: var(--muted);
  display: flex; align-items: center; justify-content: center; transition: all .2s ease;
  font-family: 'JetBrains Mono', monospace;
}
.theme-switch button:hover { color: var(--strong); }
.theme-switch button.is-active { background: var(--accent); color: #fff; box-shadow: 0 2px 10px -2px var(--accent); }

/* ---------- Дек ---------- */
.deck { position: relative; width: 100vw; height: 100vh; z-index: 1; }
.slide {
  position: absolute; inset: 0; padding: 78px 60px 64px;
  display: flex; flex-direction: column;
  opacity: 0; pointer-events: none;
  transform: translateY(20px) scale(.98);
  transition: opacity .6s var(--ease), transform .7s var(--ease);
  overflow-y: auto; overflow-x: hidden;
}
.slide.is-active { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }
.slide.is-prev { transform: translateY(-20px) scale(.98); }
.slide-inner { max-width: 1220px; width: 100%; margin: 0 auto; flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 22px; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.slide.is-active .reveal { opacity: 1; transform: translateY(0); }
.slide.is-active .reveal.stagger-1 { transition-delay: .07s; }
.slide.is-active .reveal.stagger-2 { transition-delay: .14s; }
.slide.is-active .reveal.stagger-3 { transition-delay: .21s; }
.slide.is-active .reveal.stagger-4 { transition-delay: .28s; }
.slide.is-active .reveal.stagger-5 { transition-delay: .35s; }
.slide.is-active .reveal.stagger-6 { transition-delay: .42s; }
.slide.is-active .reveal.stagger-7 { transition-delay: .49s; }
.slide.is-active .reveal.stagger-8 { transition-delay: .56s; }

/* ---------- Типографика ---------- */
.h2 { font-size: 40px; font-weight: 800; letter-spacing: -1.1px; line-height: 1.12; color: var(--strong); }
.h2 .accent, .accent-grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.eyebrow-line { display: flex; align-items: center; gap: 10px; margin-bottom: -4px; }
.kicker { font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.sub-lead { font-size: 17px; color: var(--muted); max-width: 760px; line-height: 1.5; }
.sub-lead b { color: var(--strong); font-weight: 700; }

/* стейдж-теги */
.tag-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.tag-ink { padding: 6px 14px; border-radius: 999px; background: var(--panel); color: var(--panel-text); font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
.tag-orange { padding: 6px 14px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .4px; }

/* ---------- Слайд 1: Титул ---------- */
.slide--title { align-items: stretch; justify-content: center; padding: 78px 76px 80px; }
.title-wrap { max-width: 1080px; margin: 0 auto; flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 26px; }
.title-eyebrow {
  display: inline-flex; align-items: center; gap: 10px; align-self: flex-start;
  padding: 8px 16px; border-radius: 999px; background: var(--chip-bg);
  color: var(--muted); font-size: 13px; font-weight: 600;
  border: 1px solid var(--line);
}
.title-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: #0e9f6e; box-shadow: 0 0 0 0 rgba(14,159,110,.6); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(14,159,110,.55); } 50% { box-shadow: 0 0 0 9px rgba(14,159,110,0); } }
.title-name { font-size: 30px; font-weight: 800; color: var(--strong); letter-spacing: -.6px; }
.title-main { font-size: 66px; font-weight: 900; letter-spacing: -2.4px; line-height: 1.04; color: var(--strong); }
.title-main span { display: block; }
.title-sub { font-size: 22px; color: var(--muted); line-height: 1.42; max-width: 840px; }
.title-sub b { color: var(--strong); font-weight: 700; }
.title-meta { display: flex; align-items: center; gap: 30px; margin-top: 14px; flex-wrap: wrap; }
.meta-num { font-size: 40px; font-weight: 800; color: var(--strong); letter-spacing: -1.2px; font-variant-numeric: tabular-nums; }
.meta-num .u { font-size: 18px; font-weight: 700; color: var(--muted); }
.meta-label { font-size: 13px; color: var(--muted); margin-top: 2px; }
.meta-sep { width: 1px; height: 58px; background: var(--line); }
.hint { position: absolute; bottom: 22px; left: 0; right: 0; text-align: center; font-size: 12px; color: var(--muted); letter-spacing: .3px; }
.hint b { color: var(--accent); font-weight: 700; }

/* ---------- Секции: карточки, сетки ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-soft); position: relative; overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-3)); opacity: 0; transition: opacity .25s; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card .ico { width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; background: linear-gradient(135deg, color-mix(in srgb, var(--accent-2) 16%, transparent), color-mix(in srgb, var(--accent-3) 16%, transparent)); color: var(--accent-2); }
.card .ico svg { width: 22px; height: 22px; }
.card h3 { font-size: 17px; font-weight: 800; color: var(--strong); margin-bottom: 7px; letter-spacing: -.3px; }
.card p { font-size: 13.5px; color: var(--muted); line-height: 1.5; }
.card .tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 4px 11px; border-radius: 999px; background: var(--chip-bg); border: 1px solid var(--chip-line); font-size: 11.5px; color: var(--muted); font-weight: 600; }

/* ---------- Кейсы ---------- */
.cases { display: flex; flex-direction: column; gap: 14px; }
.case {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 22px 26px; box-shadow: var(--shadow-soft);
  display: grid; grid-template-columns: 58px 1fr; gap: 20px; align-items: start;
  transition: transform .22s var(--ease), box-shadow .22s;
}
.case:hover { transform: translateX(5px); box-shadow: var(--shadow); }
.case .num { font-size: 26px; font-weight: 900; color: transparent; -webkit-text-stroke: 1.5px var(--accent); line-height: 1.2; opacity: .8; font-variant-numeric: tabular-nums; }
.case h3 { font-size: 18px; font-weight: 800; color: var(--strong); margin-bottom: 6px; letter-spacing: -.3px; }
.case p { font-size: 14.5px; color: var(--muted); line-height: 1.55; }
.case p b { color: var(--strong); font-weight: 700; }
.case .m { color: #0e9f6e; font-weight: 800; }
html[data-theme="neon"] .case .m { color: var(--accent); }
.case-metrics { display: flex; gap: 22px; margin-top: 12px; flex-wrap: wrap; }
.cm { display: flex; flex-direction: column; }
.cm-k { font-size: 26px; font-weight: 900; letter-spacing: -1px; color: var(--strong); font-variant-numeric: tabular-nums; line-height: 1; }
.cm-k .u { font-size: 15px; color: var(--muted); font-weight: 700; }
.cm-l { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ---------- Статы (слайд 2) ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat {
  background: var(--card-alt); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px 22px; box-shadow: var(--shadow-soft); text-align: left;
}
.stat-k { font-size: 44px; font-weight: 900; letter-spacing: -1.6px; font-variant-numeric: tabular-nums; line-height: 1; background: linear-gradient(120deg, var(--accent-2), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-k .u { font-size: 20px; -webkit-text-fill-color: var(--muted); }
.stat-l { font-size: 13px; color: var(--muted); margin-top: 10px; line-height: 1.4; }

/* ---------- Панель (тёмный баннер) ---------- */
.panel {
  display: flex; gap: 18px; align-items: center;
  background: var(--panel); color: var(--panel-text);
  border-radius: var(--radius-lg); padding: 22px 28px; box-shadow: var(--shadow);
  position: relative; overflow: hidden;
}
.panel::before { content: ""; position: absolute; right: -40px; top: -40px; width: 220px; height: 220px; background: radial-gradient(circle, color-mix(in srgb, var(--accent) 30%, transparent), transparent 60%); }
.panel .p-ico { width: 48px; height: 48px; border-radius: 12px; background: rgba(255,255,255,.12); color: var(--accent-soft); display: flex; align-items: center; justify-content: center; flex-shrink: 0; position: relative; z-index: 1; }
.panel .p-ico svg { width: 24px; height: 24px; }
.panel .p-label { font-size: 11px; opacity: .7; letter-spacing: 1.4px; text-transform: uppercase; font-weight: 700; position: relative; z-index: 1; }
.panel .p-text { font-size: 17px; margin-top: 2px; font-weight: 500; position: relative; z-index: 1; }
.panel .p-text b { color: #fff; font-weight: 800; }
html[data-theme="neon"] .panel .p-text b { color: var(--accent-soft); }

/* ---------- Стек ---------- */
.stack-group { margin-bottom: 16px; }
.stack-group-t { font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.stack { display: flex; flex-wrap: wrap; gap: 10px; }
.stack span {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 16px; font-size: 14px; font-weight: 600; box-shadow: var(--shadow-soft);
  transition: transform .18s, border-color .18s, color .18s;
}
.stack span:hover { transform: translateY(-3px) scale(1.03); border-color: var(--accent); color: var(--accent); }
.stack span.hot { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: color-mix(in srgb, var(--accent) 8%, var(--card)); }

/* ---------- Таймлайн (опыт) ---------- */
.timeline { position: relative; padding-left: 28px; display: flex; flex-direction: column; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(var(--accent-2), var(--accent-3)); }
.tl { position: relative; }
.tl::before { content: ""; position: absolute; left: -27px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 3px solid var(--accent); }
.tl .yr { font-size: 12px; font-weight: 800; color: var(--accent); letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.tl b { display: block; font-size: 16px; color: var(--strong); margin-top: 2px; }
.tl span { font-size: 13.5px; color: var(--muted); }
.about-lead p { font-size: 15px; color: var(--muted); line-height: 1.6; margin-bottom: 12px; }
.about-lead p b { color: var(--strong); font-weight: 700; }
.about-lead .big { font-size: 22px; color: var(--strong); font-weight: 800; letter-spacing: -.5px; margin-bottom: 14px; }
.about-lead .big em { font-style: normal; color: var(--accent); }

/* ---------- Процесс ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px 22px; box-shadow: var(--shadow-soft); position: relative; transition: transform .2s; }
.step:hover { transform: translateY(-4px); }
.step .n { font-size: 30px; font-weight: 900; background: linear-gradient(120deg, var(--accent), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 8px; font-variant-numeric: tabular-nums; }
.step b { display: block; font-size: 16px; color: var(--strong); margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* ---------- Финал / контакты ---------- */
.contact-box {
  position: relative; overflow: hidden; border-radius: 24px; padding: 48px 44px; text-align: center;
  background: linear-gradient(135deg, #123a75, var(--accent-2) 55%, var(--accent-3));
  color: #fff; box-shadow: var(--shadow);
}
html[data-theme="neon"] .contact-box { background: linear-gradient(135deg, #06202f, #0b5f6a 55%, #12805a); }
.contact-box h2 { color: #fff; font-size: 34px; font-weight: 800; letter-spacing: -.6px; margin-bottom: 10px; }
.contact-box p { color: rgba(255,255,255,.85); font-size: 17px; margin-bottom: 26px; }
.contact-links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.contact-links a { display: inline-flex; align-items: center; gap: 10px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3); color: #fff; padding: 14px 26px; border-radius: 14px; font-size: 16px; font-weight: 700; backdrop-filter: blur(6px); transition: background .2s, transform .2s; }
.contact-links a:hover { background: rgba(255,255,255,.28); transform: translateY(-2px); }
.contact-orb { position: absolute; border-radius: 50%; filter: blur(50px); opacity: .4; pointer-events: none; }
.contact-orb.o1 { width: 300px; height: 300px; background: #7ee787; left: -80px; bottom: -140px; }
.contact-orb.o2 { width: 340px; height: 340px; background: #a78bfa; right: -100px; top: -160px; }
.signature { margin-top: 18px; text-align: center; font-size: 12px; color: var(--muted); letter-spacing: 1px; text-transform: uppercase; font-weight: 600; }

/* ---------- Управление ---------- */
.controls { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 40; }
.ctrl { width: 46px; height: 46px; border-radius: 50%; background: var(--card); border: 1px solid var(--line); color: var(--strong); cursor: pointer; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(10px); box-shadow: var(--shadow-soft); transition: all .2s ease; }
.ctrl:hover { transform: translateY(-2px); background: var(--accent); color: #fff; border-color: var(--accent); }
.ctrl:disabled { opacity: .35; cursor: not-allowed; transform: none; }
.ctrl svg { width: 20px; height: 20px; }
.dots { position: fixed; right: 20px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 9px; z-index: 40; }
.dot-btn { width: 8px; height: 8px; border-radius: 50%; background: color-mix(in srgb, var(--muted) 45%, transparent); border: none; cursor: pointer; transition: all .3s ease; padding: 0; }
.dot-btn.is-active { background: var(--accent); height: 22px; border-radius: 4px; }
.dot-btn:hover:not(.is-active) { background: var(--muted); }

/* ---------- Адаптив ---------- */
@media (max-width: 1080px) {
  .title-main { font-size: 46px; }
  .grid-3, .grid-2, .stat-grid, .steps { grid-template-columns: 1fr 1fr !important; }
  .h2 { font-size: 30px; }
}
@media (max-width: 720px) {
  .slide { padding: 70px 20px 60px; }
  .title-main { font-size: 34px; letter-spacing: -1px; }
  .title-sub { font-size: 16px; }
  .grid-3, .grid-2, .stat-grid, .steps { grid-template-columns: 1fr !important; }
  .h2 { font-size: 24px; }
  .title-meta { gap: 18px; } .meta-sep { display: none; }
  .case { grid-template-columns: 1fr; }
  .nav { padding: 0 12px; gap: 10px; }
  .nav-brand span.full { display: none; }
  .dots { right: 8px; }
}
