/* ============ Техносерв-Саратов — design tokens ============ */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --radius-sm: .375rem; --radius-md: .625rem; --radius-lg: 1rem; --radius-xl: 1.5rem;
  --maxw: 1200px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* Light — фирменные цвета из шаблона КП: бирюзовый #0097B2, тёмно-серый #454747 */
:root, [data-theme="light"] {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --surface-2: #eef3f4;
  --surface-inset: #e6edef;
  --border: #d5dee0;
  --divider: #e3eaec;
  --text: #23292a;
  --text-muted: #5c6667;
  --text-faint: #8e9899;
  --text-inverse: #f7fbfc;
  --accent: #0097b2;
  --accent-hover: #007c93;
  --accent-soft: #e0f3f7;
  --accent-2: #454747;
  --shadow-sm: 0 1px 2px rgba(35,41,42,.06), 0 2px 8px rgba(35,41,42,.05);
  --shadow-md: 0 10px 30px rgba(35,41,42,.10);
  --grid-line: rgba(35,41,42,.055);
  --hero-ink: #ffffff;
  --hero-ink-muted: #c3cbcb;
}

[data-theme="dark"] {
  --bg: #1e2020;
  --surface: #282a2a;
  --surface-2: #303232;
  --surface-inset: #232525;
  --border: #454747;
  --divider: #373939;
  --text: #eef2f2;
  --text-muted: #a3adad;
  --text-faint: #78807f;
  --text-inverse: #1e2020;
  --accent: #16b8d4;
  --accent-hover: #4fd0e6;
  --accent-soft: #16333a;
  --accent-2: #cfd6d6;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 12px 36px rgba(0,0,0,.45);
  --grid-line: rgba(255,255,255,.05);
  --hero-ink: #ffffff;
  --hero-ink-muted: #b9c1c1;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #1e2020; --surface: #282a2a; --surface-2: #303232; --surface-inset: #232525;
    --border: #454747; --divider: #373939; --text: #eef2f2; --text-muted: #a3adad;
    --text-faint: #78807f; --text-inverse: #1e2020; --accent: #16b8d4; --accent-hover: #4fd0e6;
    --accent-soft: #16333a; --accent-2: #cfd6d6;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.4); --shadow-md: 0 12px 36px rgba(0,0,0,.45);
    --grid-line: rgba(255,255,255,.05);
  }
}

/* ============ base ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv05";
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { font-family: "Montserrat", "Inter", sans-serif; line-height: 1.14; letter-spacing: -.022em; margin: 0; font-weight: 700; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - var(--space-8), var(--maxw)); margin-inline: auto; }
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.eyebrow {
  font-size: var(--text-xs); font-weight: 650; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent); display: inline-flex; align-items: center; gap: var(--space-2);
}
.eyebrow::before { content:""; width: 22px; height: 1px; background: currentColor; opacity: .6; }
.h2 { font-size: var(--text-xl); max-width: 22ch; }
.lead { font-size: var(--text-base); color: var(--text-muted); max-width: 62ch; }
.mt-3 { margin-top: var(--space-3); } .mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); } .mt-10 { margin-top: var(--space-10); }
.mt-12 { margin-top: var(--space-12); }

/* ============ header ============ */
.header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.header.is-stuck { border-bottom-color: var(--divider); }
.header__inner { display: flex; align-items: center; gap: var(--space-6); height: 68px; }
.brand { display: flex; align-items: center; gap: var(--space-3); margin-right: auto; }
.brand__mark { color: var(--accent); flex: none; }
.brand__name { font-family: "Montserrat", sans-serif; font-weight: 750; font-size: var(--text-sm); letter-spacing: -.01em; line-height: 1.15; }
.brand__sub { display: block; font-size: var(--text-xs); font-weight: 500; color: var(--text-faint); letter-spacing: .04em; }
.nav { display: flex; gap: var(--space-6); font-size: var(--text-sm); color: var(--text-muted); }
.nav a { position: relative; padding-block: var(--space-1); transition: color .2s var(--ease); }
.nav a::after {
  content:""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1.5px;
  background: var(--accent); transition: right .3s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { right: 0; }
.header__actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
  cursor: pointer; transition: color .2s, border-color .2s, transform .2s var(--ease);
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.icon-btn .moon { display: none; }
[data-theme="dark"] .icon-btn .sun { display: none; }
[data-theme="dark"] .icon-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .icon-btn .sun { display: none; }
  :root:not([data-theme]) .icon-btn .moon { display: block; }
}
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm);
  font-weight: 600; padding: var(--space-3) var(--space-5); border-radius: var(--radius-md);
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s var(--ease), color .2s, border-color .2s, transform .2s var(--ease);
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn--ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--onhero { border-color: rgba(255,255,255,.28); color: var(--hero-ink); }
.btn--onhero:hover { border-color: rgba(255,255,255,.7); color: #fff; }
@media (max-width: 900px) { .nav { display: none; } }

/* ============ hero ============ */
.hero {
  position: relative; overflow: hidden; isolation: isolate;
  background:
    radial-gradient(1000px 520px at 80% -12%, rgba(0,151,178,.30), transparent 62%),
    radial-gradient(880px 620px at 4% 112%, rgba(0,151,178,.16), transparent 64%),
    linear-gradient(158deg, #3c3e3e 0%, #454747 46%, #313333 100%);
  color: var(--hero-ink);
  padding-block: clamp(var(--space-20), 12vw, 9rem);
  border-bottom: 1px solid var(--divider);
}
.hero__grid {
  position: absolute; inset: 0; z-index: -1; opacity: .5;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 90% at 50% 20%, #000 35%, transparent 85%);
}
.hero__glow {
  position: absolute; z-index: -1; width: 620px; height: 620px; right: -140px; top: -180px;
  background: conic-gradient(from 210deg, rgba(0,151,178,.55), rgba(0,151,178,.15), rgba(0,151,178,.42), rgba(0,151,178,.18));
  filter: blur(90px); border-radius: 50%; opacity: .55;
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift { to { transform: translate3d(-70px, 60px, 0) scale(1.12); } }
.hero__inner { display: grid; grid-template-columns: 1.06fr .94fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.hero h1 { font-size: var(--text-2xl); max-width: 16ch; margin-top: var(--space-5); }
.hero h1 em { font-style: normal; color: transparent; background: linear-gradient(100deg, #7fe3f2, #23b6d2 60%, #0097b2); -webkit-background-clip: text; background-clip: text; }
.hero .lead { color: var(--hero-ink-muted); margin-top: var(--space-6); max-width: 54ch; }
.hero .eyebrow { color: #57d3e6; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }

.stats { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-lg); overflow: hidden; }
.stat { background: rgba(38,40,40,.62); padding: var(--space-6); backdrop-filter: blur(6px); }
.stat__num { font-family: "Montserrat", sans-serif; font-size: clamp(1.0625rem, 1rem + .45vw, 1.375rem); white-space: nowrap; font-weight: 750; letter-spacing: -.02em; color: #fff; }
.stat__label { font-size: var(--text-xs); color: var(--hero-ink-muted); margin-top: var(--space-1); line-height: 1.45; }
@media (max-width: 900px) { .hero__inner { grid-template-columns: 1fr; } }

/* ============ marquee-free capability strip ============ */
.strip { border-bottom: 1px solid var(--divider); background: var(--surface); }
.strip__inner { display: flex; flex-wrap: wrap; gap: var(--space-6) var(--space-10); padding-block: var(--space-5); align-items: center; }
.strip span { font-size: var(--text-xs); letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint); font-weight: 600; }
.strip span::before { content: "//"; color: var(--accent); margin-right: var(--space-2); opacity: .7; }

/* ============ cards / grids ============ */
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: var(--space-6); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--space-6); }
@media (max-width: 1120px) { .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 980px) { .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 680px) { .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; } }

.card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  transition: transform .35s var(--ease), border-color .3s, box-shadow .35s var(--ease);
  overflow: hidden;
}
.card::after {
  content:""; position: absolute; left: 0; top: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .45s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in oklab, var(--accent) 45%, var(--border)); box-shadow: var(--shadow-md); }
.card:hover::after { width: 100%; }
.card__icon {
  width: 46px; height: 46px; border-radius: var(--radius-md); display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: var(--space-5);
}
.card h3 { font-size: var(--text-lg); }
.card p { color: var(--text-muted); font-size: var(--text-sm); margin-top: var(--space-3); }
.card__num { position: absolute; right: var(--space-6); top: var(--space-5); font-size: var(--text-xs); color: var(--text-faint); font-variant-numeric: tabular-nums; letter-spacing: .1em; }

.card--cta {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-8);
  background:
    radial-gradient(520px 240px at 100% 0%, var(--accent-soft), transparent 72%),
    var(--surface);
}
.card--cta .card__icon { margin-bottom: var(--space-4); }
.card--cta p { max-width: 52ch; }
.card--cta .card__num { display: none; }
.card--cta .btn { flex: none; }
@media (max-width: 680px) {
  .card--cta { flex-direction: column; align-items: flex-start; }
}

/* services list */
.svc { border-top: 1px solid var(--divider); }
.svc__row {
  display: grid; grid-template-columns: 56px 1fr 1.25fr; gap: var(--space-6);
  padding-block: var(--space-8); border-bottom: 1px solid var(--divider);
  transition: background .3s var(--ease);
}
.svc__row:hover { background: var(--surface-2); }
.svc__idx { font-size: var(--text-xs); color: var(--accent); font-variant-numeric: tabular-nums; letter-spacing: .1em; padding-top: .35rem; }
.svc__title { font-family: "Montserrat", sans-serif; font-weight: 700; font-size: var(--text-lg); letter-spacing: -.02em; }
.svc__body { color: var(--text-muted); font-size: var(--text-sm); }
.tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.tag { font-size: var(--text-xs); padding: var(--space-1) var(--space-3); border-radius: 999px; border: 1px solid var(--border); color: var(--text-muted); background: var(--surface); }
@media (max-width: 780px) { .svc__row { grid-template-columns: 40px 1fr; } .svc__body { grid-column: 2; } }

/* quality band */
.band { background: var(--surface); border-block: 1px solid var(--divider); }
.band__inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center; }
.qlist { display: grid; gap: var(--space-4); margin-top: var(--space-8); padding: 0; list-style: none; }
.qlist li { display: flex; gap: var(--space-4); font-size: var(--text-sm); color: var(--text-muted); }
.qlist svg { flex: none; color: var(--accent-2); margin-top: 3px; }
.iso {
  border: 1px solid var(--border); border-radius: var(--radius-xl); padding: var(--space-10);
  background:
    radial-gradient(420px 220px at 100% 0%, var(--accent-soft), transparent 70%),
    var(--surface-2);
  position: relative; overflow: hidden;
}
.iso__code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: var(--text-xs); color: var(--text-faint); letter-spacing: .18em; text-transform: uppercase; }
.iso__big { font-family: "Montserrat", sans-serif; font-size: var(--text-xl); font-weight: 750; letter-spacing: -.03em; margin-top: var(--space-3); }
.iso__desc { font-size: var(--text-sm); color: var(--text-muted); margin-top: var(--space-4); }
@media (max-width: 880px) { .band__inner { grid-template-columns: 1fr; } }

/* director */
.director__inner { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center; }
.portrait {
  position: relative; border-radius: var(--radius-xl); overflow: hidden;
  border: 1px solid var(--border); background: var(--surface-2); aspect-ratio: 4 / 5;
  box-shadow: var(--shadow-md);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
.portrait::after {
  content:""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to top, rgba(8,14,24,.42), transparent 42%);
}
.portrait__placeholder {
  position: absolute; inset: 0; display: grid; place-content: center; justify-items: center;
  gap: var(--space-3); color: var(--text-faint); text-align: center; padding: var(--space-6);
  font-size: var(--text-xs); letter-spacing: .08em; text-transform: uppercase;
}
.director__name { font-size: var(--text-xl); margin-top: var(--space-5); }
.director__role { font-size: var(--text-sm); color: var(--accent); font-weight: 600; margin-top: var(--space-2); letter-spacing: .01em; }
.quote { font-size: var(--text-lg); line-height: 1.5; letter-spacing: -.015em; font-weight: 500; margin-top: var(--space-8); position: relative; padding-left: var(--space-6); }
.quote::before { content:""; position: absolute; left: 0; top: .35em; bottom: .35em; width: 2px; background: linear-gradient(var(--accent), var(--accent-2)); border-radius: 2px; }
@media (max-width: 880px) { .director__inner { grid-template-columns: 1fr; } .portrait { max-width: 380px; } }

/* contacts */
.contact-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-8) var(--space-6); }
.contact-card h3 { font-size: var(--text-sm); text-transform: uppercase; letter-spacing: .12em; color: var(--text-faint); font-weight: 650; }
.contact-card .val { font-family: "Montserrat", sans-serif; font-size: clamp(1rem, .88rem + .38vw, 1.1875rem); font-weight: 700; letter-spacing: -.02em; margin-top: var(--space-3); white-space: nowrap; }
.contact-card .val a:hover { color: var(--accent); }
.contact-card .sub { font-size: var(--text-sm); color: var(--text-muted); margin-top: var(--space-2); }
.contact-card .val--sm { font-size: var(--text-base); margin-top: var(--space-5); }
.contact-card h3 { min-height: 2.4em; }

/* footer */
.footer { border-top: 1px solid var(--divider); background: var(--surface); padding-block: var(--space-12); }
.footer__inner { display: flex; flex-wrap: wrap; gap: var(--space-6); align-items: center; justify-content: space-between; }
.footer small { color: var(--text-faint); font-size: var(--text-xs); }

/* reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__glow { animation: none; }
  html { scroll-behavior: auto; }
}