/* ==========================================================================
   Истра-Дайв — холодная пресная вода, а не тропики.
   Тёмная тема по умолчанию; светлая — по системной настройке или data-theme.
   ========================================================================== */

:root{
  /* ground */
  --bg:#061317;
  --bg-deep:#03090C;
  --surface:#0B1F26;
  --surface-2:#102D37;
  /* ink */
  --ink:#E7F1F0;
  --ink-dim:#9DB6B9;
  --ink-faint:#7A979D;
  /* structure */
  --line:rgba(150,200,205,.16);
  --line-strong:rgba(150,200,205,.32);
  /* accent — сигнальный буй */
  --accent:#FF8A3D;
  --accent-hi:#FFA968;
  --accent-soft:rgba(255,138,61,.13);
  --accent-ink:#0A1A1F;
  --glow:rgba(255,138,61,.28);

  --shadow:0 1px 0 rgba(255,255,255,.04), 0 24px 50px -30px rgba(0,0,0,.95);
  --maxw:1160px;
  --gut:clamp(1.15rem,4vw,2.75rem);
  --band:clamp(3.75rem,8vw,7rem);
  --step:clamp(1rem,.62rem + 1.5vw,1.32rem);
  --radius:3px;
}

@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#E9EFEF;
    --bg-deep:#D3DEDF;
    --surface:#F8FBFB;
    --surface-2:#E1EBEB;
    --ink:#07181D;
    --ink-dim:#425C63;
    --ink-faint:#5E787F;
    --line:rgba(7,24,29,.14);
    --line-strong:rgba(7,24,29,.28);
    --accent:#BC4B08;
    --accent-hi:#963B04;
    --accent-soft:rgba(188,75,8,.09);
    --accent-ink:#FFF7F1;
    --glow:rgba(188,75,8,.22);
    --shadow:0 1px 0 rgba(255,255,255,.75), 0 20px 40px -30px rgba(7,24,29,.55);
  }
}
:root[data-theme="light"]{
  --bg:#E9EFEF;
  --bg-deep:#D3DEDF;
  --surface:#F8FBFB;
  --surface-2:#E1EBEB;
  --ink:#07181D;
  --ink-dim:#425C63;
  --ink-faint:#5E787F;
  --line:rgba(7,24,29,.14);
  --line-strong:rgba(7,24,29,.28);
  --accent:#BC4B08;
  --accent-hi:#963B04;
  --accent-soft:rgba(188,75,8,.09);
  --accent-ink:#FFF7F1;
  --glow:rgba(188,75,8,.22);
  --shadow:0 1px 0 rgba(255,255,255,.75), 0 20px 40px -30px rgba(7,24,29,.55);
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}

body{
  margin:0;
  background-color:var(--bg);
  background-image:linear-gradient(180deg,var(--bg) 0%,var(--bg) 14%,var(--bg-deep) 100%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:"Golos Text",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:var(--step);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block}
a{color:inherit}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

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

.skip{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--accent);color:var(--accent-ink);padding:.7rem 1.2rem;font-weight:600;
}
.skip:focus{left:0}

h1,h2,h3{
  font-family:Unbounded,"Arial Black",system-ui,sans-serif;
  font-weight:700;line-height:1.07;letter-spacing:-.025em;
  text-wrap:balance;margin:0;
}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}

.eyebrow{
  font-size:.72rem;font-weight:600;letter-spacing:.17em;text-transform:uppercase;
  color:var(--accent);margin:0;
}
.eyebrow--mute{color:var(--ink-faint)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  font-family:"Golos Text",sans-serif;font-size:.94rem;font-weight:600;line-height:1.2;
  padding:.82rem 1.4rem;border-radius:var(--radius);text-decoration:none;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn--solid{background:var(--accent);color:var(--accent-ink)}
.btn--solid:hover{background:var(--accent-hi);transform:translateY(-2px);box-shadow:0 10px 24px -12px var(--glow)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn--sm{padding:.55rem 1rem;font-size:.86rem}

/* ---------- masthead ---------- */
.masthead{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--bg) 84%,transparent);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,background-color .25s ease;
}
.masthead.is-stuck{border-bottom-color:var(--line)}
.masthead-inner{display:flex;align-items:center;gap:1.5rem;min-height:72px}

.brand{display:flex;align-items:center;margin-right:auto;flex:none}
.brand img{height:50px;width:auto;filter:invert(1);transition:height .25s ease}
.masthead.is-stuck .brand img{height:38px}
:root[data-theme="light"] .brand img{filter:none}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .brand img{filter:none}}

.nav ul{display:flex;gap:1.6rem;list-style:none;margin:0;padding:0}
.nav a{
  text-decoration:none;font-size:.9rem;font-weight:500;color:var(--ink-dim);
  padding-block:.35rem;border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.nav a:hover,.nav a.is-active{color:var(--ink);border-bottom-color:var(--accent)}

.burger{display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0;background:none;border:1px solid var(--line);
  border-radius:var(--radius);cursor:pointer;flex:none}
.burger span{display:block;height:2px;width:20px;margin-inline:auto;background:var(--ink);
  transition:transform .22s ease,opacity .22s 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)}

.drawer{border-top:1px solid var(--line);background:var(--surface)}
.drawer ul{list-style:none;margin:0;padding:.5rem var(--gut) 1.2rem}
.drawer a{display:block;padding:.85rem 0;text-decoration:none;font-weight:500;
  border-bottom:1px solid var(--line)}
.drawer li:last-child a{border-bottom:0}

@media (max-width:900px){
  .nav{display:none}
  .burger{display:flex}
  .masthead-cta{display:none}
}
@media (min-width:901px){.drawer{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;isolation:isolate;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-canvas,.hero-contours{position:absolute;inset:0;width:100%;height:100%;z-index:-1}
.hero-contours{opacity:.55}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1.62fr) minmax(0,.86fr);
  gap:clamp(2rem,5vw,3.5rem);align-items:end;
  padding-block:clamp(4.5rem,12vw,9rem) clamp(3rem,6vw,5rem);
}
@media (max-width:900px){.hero-inner{grid-template-columns:1fr;align-items:start}}

.hero-title{
  font-size:clamp(2.35rem,1rem + 5.4vw,4.3rem);
  font-weight:800;letter-spacing:-.038em;margin:1.15rem 0 0;
}
.hero-title em{font-style:normal;color:var(--accent);display:block}
.hero-lede{
  font-size:clamp(1.05rem,.9rem + .65vw,1.28rem);color:var(--ink-dim);
  max-width:54ch;margin-top:1.65rem;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2.3rem}
.hero-note{
  border-left:2px solid var(--accent);padding:.2rem 0 .2rem 1.15rem;
  font-size:.95rem;color:var(--ink-dim);max-width:34ch;margin:0;
}
.hero-note strong{color:var(--ink);font-weight:600}

/* ---------- facts ---------- */
.facts{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 55%,transparent)}
.facts-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  max-width:var(--maxw);margin-inline:auto;
}
@media (max-width:820px){.facts-grid{grid-template-columns:repeat(2,1fr)}}
.fact{padding:1.9rem var(--gut);border-left:1px solid var(--line)}
.fact:first-child{border-left:0}
@media (max-width:820px){
  .fact:nth-child(3){border-left:0}
  .fact:nth-child(n+3){border-top:1px solid var(--line)}
}
.fact-n{
  font-family:Unbounded,sans-serif;font-weight:700;
  font-size:clamp(1.95rem,1.2rem + 2vw,2.9rem);
  line-height:1;letter-spacing:-.035em;font-variant-numeric:tabular-nums;display:block;
}
.fact-l{display:block;font-size:.84rem;color:var(--ink-dim);margin-top:.65rem;line-height:1.42}

/* ---------- bands ---------- */
main > section.band{padding-block:var(--band)}
main > section.band + section.band{border-top:1px solid var(--line)}
section[id]{scroll-margin-top:88px}

.band-head{max-width:62ch;margin-bottom:clamp(2.2rem,4.5vw,3.4rem)}
.band-head h2{font-size:clamp(1.8rem,1.1rem + 2.3vw,3rem);margin-top:.8rem}
.band-intro{color:var(--ink-dim);margin-top:1.1rem}

/* ---------- timeline ---------- */
.tl{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.tl-item{
  display:grid;grid-template-columns:12rem minmax(0,1fr);
  gap:clamp(1rem,3vw,2.5rem);
  padding-block:1.9rem;border-bottom:1px solid var(--line);align-items:start;
  position:relative;
}
@media (max-width:760px){.tl-item{grid-template-columns:1fr;gap:.5rem}}
.tl-when{
  font-family:Unbounded,sans-serif;font-weight:700;font-size:1.05rem;letter-spacing:-.015em;
  font-variant-numeric:tabular-nums;color:var(--accent);padding-top:.15rem;
}
.tl-item:last-child .tl-when{color:var(--ink)}
.tl-body h3{font-size:1.14rem;font-weight:700;letter-spacing:-.012em;margin-bottom:.5rem}
.tl-body p{margin:0;color:var(--ink-dim);max-width:64ch;font-size:.98rem}
.names,.tl-body strong{color:var(--ink);font-weight:600}

/* ---------- cards ---------- */
.cards{
  display:grid;gap:1px;grid-template-columns:repeat(2,1fr);
  background:var(--line);border:1px solid var(--line);
}
@media (max-width:760px){.cards{grid-template-columns:1fr}}
.card{
  background:var(--bg);padding:clamp(1.6rem,3.5vw,2.4rem);
  display:flex;flex-direction:column;gap:.75rem;
  transition:background-color .22s ease;position:relative;
}
.card::after{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .28s ease;
}
.card:hover{background:var(--surface)}
.card:hover::after{transform:scaleX(1)}
.card h3{font-size:1.22rem;letter-spacing:-.018em}
.card p{margin:0;color:var(--ink-dim);font-size:.96rem}
.card .tag{font-size:.7rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-faint)}

/* ---------- feature ---------- */
.feature{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  padding:clamp(1.8rem,4vw,3.2rem);box-shadow:var(--shadow);
  display:grid;gap:clamp(1.6rem,4vw,3.2rem);
  grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:start;
}
.feature--flip .feature-main{order:2}
.feature--flip .feature-side{order:1}
@media (max-width:820px){
  .feature{grid-template-columns:1fr}
  .feature--flip .feature-main,.feature--flip .feature-side{order:0}
}
.feature h2{font-size:clamp(1.55rem,1rem + 1.9vw,2.4rem);margin-top:.8rem}
.feature .lead{color:var(--ink);font-size:1.06rem;margin-top:1.1rem}
.feature-body{color:var(--ink-dim);margin-top:1rem}
.feature-cta{margin-top:1.6rem}
.feature-side{display:grid;gap:1.7rem}

.pullquote{margin:0}
.pullquote p{
  font-family:Unbounded,sans-serif;font-weight:500;
  font-size:clamp(1.05rem,.9rem + .6vw,1.32rem);
  line-height:1.42;letter-spacing:-.02em;color:var(--ink);margin:0;
}
.pullquote cite{
  display:block;font-style:normal;font-size:.86rem;font-weight:400;
  color:var(--ink-dim);margin-top:.95rem;letter-spacing:0;line-height:1.5;
}

.checks{list-style:none;margin:.9rem 0 0;padding:0;display:grid;gap:.75rem}
.checks li{position:relative;padding-left:1.7rem;font-size:.95rem;color:var(--ink-dim)}
.checks li::before{
  content:"";position:absolute;left:.1rem;top:.6em;width:.5rem;height:.5rem;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(-45deg);
}

/* ---------- table ---------- */
.tablewrap{overflow-x:auto;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.96rem}
th,td{text-align:left;padding:1rem 1.25rem;border-bottom:1px solid var(--line)}
thead th{
  font-size:.7rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;
  color:var(--ink-faint);background:color-mix(in srgb,var(--surface) 70%,transparent);
}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
tbody th{font-weight:600;white-space:nowrap;color:var(--ink)}
tbody td{color:var(--ink-dim)}

/* ---------- chips ---------- */
.dests{display:grid;gap:1.8rem;grid-template-columns:repeat(2,1fr)}
@media (max-width:760px){.dests{grid-template-columns:1fr}}
.dest{border-top:2px solid var(--line-strong);padding-top:1.2rem}
.dest h3{font-size:1rem;letter-spacing:.01em;margin-bottom:1rem}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;margin:0;padding:0}
.chips li{
  font-size:.87rem;padding:.4rem .85rem;border:1px solid var(--line);
  border-radius:99px;color:var(--ink-dim);
}

/* ---------- contacts ---------- */
.contact-grid{display:grid;gap:clamp(1.6rem,4vw,3.2rem);grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
@media (max-width:820px){.contact-grid{grid-template-columns:1fr}}
.dl{margin:0}
.dl > div{
  padding-block:1.1rem;border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:9.5rem 1fr;gap:1rem;align-items:baseline;
}
@media (max-width:560px){.dl > div{grid-template-columns:1fr;gap:.25rem}}
.dl dt{font-size:.72rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-faint)}
.dl dd{margin:0;font-size:1rem}
.dl dd a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent}
.dl dd a:hover{border-bottom-color:var(--accent)}
.dl dd small{display:block;color:var(--ink-dim);font-size:.85rem;margin-top:.25rem}

.callout{
  background:var(--accent-soft);border:1px solid var(--line);
  padding:clamp(1.6rem,3.5vw,2.3rem);align-self:start;
  display:flex;flex-direction:column;gap:1.1rem;align-items:flex-start;
}
.callout h3{font-size:1.28rem}
.callout p{margin:0;color:var(--ink-dim);font-size:.96rem}

/* ---------- prose (обычные страницы) ---------- */
.prose{max-width:68ch}
.prose h1{font-size:clamp(2rem,1.2rem + 2.5vw,3rem);margin-bottom:1.2rem}
.prose h2{font-size:1.6rem;margin:2.2rem 0 .8rem}
.prose a{color:var(--accent)}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding-block:3rem;background:var(--bg-deep)}
.foot-inner{display:flex;flex-wrap:wrap;gap:2rem;align-items:flex-start;justify-content:space-between}
.foot-brand{display:flex;flex-direction:column;align-items:flex-start;gap:1rem;max-width:44ch}
.foot img{height:68px;width:auto;opacity:.9;filter:invert(1)}
:root[data-theme="light"] .foot img{filter:none}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .foot img{filter:none}}
.foot p{margin:0;font-size:.85rem;color:var(--ink-faint)}
.foot-side{display:flex;flex-direction:column;gap:.9rem;align-items:flex-start}
.motto{font-family:Unbounded,sans-serif;font-weight:500;font-size:.92rem;
  color:var(--ink-dim);letter-spacing:-.015em;max-width:34ch}
.foot-contact{display:flex;flex-wrap:wrap;gap:1.2rem}
.foot-contact a{color:var(--accent);text-decoration:none}
.foot-contact a:hover{text-decoration:underline}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);
  transition:opacity .6s cubic-bezier(.2,.7,.3,1),transform .6s cubic-bezier(.2,.7,.3,1)}
[data-reveal].is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}