/* ============================================================
   ParsCryo — Design System  (BRIGHT THEME)
   Light airy base · indigo/purple accents · RTL
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@200;300;400;500;600;700;800;900&display=swap');

:root{
  /* ---- surfaces (cool, icy whites) ---- */
  --bg:        #eef3fc;
  --bg-2:      #e6edf9;
  --surface:   #ffffff;
  --surface-2: #f3f7fe;
  --surface-3: #e7eefc;
  --border:        rgba(47,127,240,.18);
  --border-strong: rgba(47,127,240,.32);

  /* ---- text ---- */
  --text:  #161a30;
  --muted: #565d80;
  --faint: #8b90b2;

  /* ---- accents (cold icy blues, hint of violet) ---- */
  --sky:    #38bdf8;
  --blue:   #2f7ff0;
  --indigo: #5b6ef0;
  --purple: #8b6cf0;
  --cyan:   #06b6d4;
  --indigo-ink: #1d52d6;   /* cold blue ink for text accents */

  --grad: linear-gradient(120deg, #06b6d4, #2f7ff0 48%, #5b6ef0);
  --grad-soft: linear-gradient(120deg, rgba(6,182,212,.15), rgba(47,127,240,.15));
  --glow: rgba(47,127,240,.32);
  --glow-purple: rgba(56,189,248,.30);
  --shadow: 0 16px 40px -20px rgba(40,40,90,.30);
  --shadow-lg: 0 30px 70px -28px rgba(40,40,90,.36);

  /* ---- glass / translucent surfaces (theme-aware) ---- */
  --glass:       rgba(255,255,255,.78);
  --glass-2:     rgba(255,255,255,.92);
  --glass-solid: rgba(255,255,255,.97);
  --scroll-track:#dde4f4;
  --scroll-thumb:#c4ccec;

  /* ---- geometry ---- */
  --r-sm: 10px;
  --r:    16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --maxw: 1240px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);

  /* single typeface across the whole site */
  --mono: 'Vazirmatn', system-ui, sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family:'Vazirmatn', system-ui, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}

/* atmospheric background layers */
body::before{
  content:''; position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(120% 90% at 85% -10%, rgba(47,127,240,.20), transparent 55%),
    radial-gradient(95% 80% at 8% 0%, rgba(56,189,248,.18), transparent 52%),
    radial-gradient(80% 70% at 50% 112%, rgba(6,182,212,.12), transparent 60%),
    radial-gradient(60% 50% at 70% 40%, rgba(139,108,240,.07), transparent 60%),
    var(--bg);
}
body::after{
  content:''; position:fixed; inset:0; z-index:-1; pointer-events:none;
  background-image:
    linear-gradient(rgba(47,127,240,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47,127,240,.055) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 80% at 50% 0%, #000 25%, transparent 78%);
          mask-image:radial-gradient(120% 80% at 50% 0%, #000 25%, transparent 78%);
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; }
::selection{ background:rgba(99,102,241,.22); color:var(--indigo-ink); }

/* ---------- layout ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:28px; }
section{ position:relative; }
.section{ padding-block:120px; }
@media(max-width:760px){ .section{ padding-block:76px; } .wrap{ padding-inline:20px; } }

/* ---------- type helpers ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--mono); font-size:12px; letter-spacing:.18em;
  text-transform:uppercase; color:var(--indigo-ink);
  padding:7px 14px; border:1px solid var(--border-strong);
  border-radius:100px; background:rgba(99,102,241,.07);
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background:var(--indigo);
  box-shadow:0 0 10px var(--glow); animation:pulse 2.4s var(--ease) infinite; }
@keyframes pulse{ 0%,100%{opacity:1; transform:scale(1)} 50%{opacity:.4; transform:scale(.7)} }

.h-display{ font-size:clamp(40px,6.4vw,84px); font-weight:800; line-height:1.02;
  letter-spacing:-.02em; margin:0; }
.h2{ font-size:clamp(30px,4vw,52px); font-weight:800; line-height:1.08;
  letter-spacing:-.01em; margin:0; }
.h3{ font-size:clamp(20px,2.4vw,28px); font-weight:700; margin:0; }
.lede{ font-size:clamp(16px,1.5vw,20px); color:var(--muted); max-width:56ch; }
.grad-text{ background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; }
.mono{ font-family:var(--mono); }
.faint{ color:var(--faint); }

.section-head{ display:flex; flex-direction:column; gap:18px; margin-bottom:56px; }
.section-head .h2{ max-width:18ch; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  font-weight:600; font-size:15.5px; padding:14px 26px; border-radius:100px;
  border:1px solid transparent; position:relative; isolation:isolate;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease), background .3s;
  white-space:nowrap;
}
.btn svg{ width:18px; height:18px; }
.btn:active{ transform:translateY(1px) scale(.99); }
.btn-primary{ background:var(--grad); color:#fff; font-weight:700;
  box-shadow:0 12px 28px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,.3); }
.btn-primary:hover{ transform:translateY(-3px); box-shadow:0 20px 44px -12px var(--glow); }
.btn-ghost{ background:var(--surface); color:var(--indigo-ink); border-color:var(--border-strong); box-shadow:0 6px 18px -12px rgba(40,40,90,.3); }
.btn-ghost:hover{ background:var(--surface); transform:translateY(-3px); border-color:var(--indigo); box-shadow:0 14px 30px -14px var(--glow); }
.btn-sm{ padding:10px 18px; font-size:14px; }
.btn-block{ width:100%; }

.link-arrow{ display:inline-flex; align-items:center; gap:8px; color:var(--indigo-ink);
  font-weight:600; font-size:15px; transition:gap .3s var(--ease); }
.link-arrow:hover{ gap:13px; }
.link-arrow svg{ width:16px; height:16px; }

/* ---------- chips ---------- */
.chip{ font-family:var(--mono); font-size:11.5px; letter-spacing:.04em;
  padding:5px 11px; border-radius:8px; border:1px solid var(--border);
  background:rgba(99,102,241,.06); color:var(--muted); white-space:nowrap; }

/* ---------- cards (generic) ---------- */
.card{ background:var(--surface); border:1px solid var(--border); border-radius:var(--r-lg);
  position:relative; box-shadow:var(--shadow); }

/* ---------- header / nav ---------- */
.site-header{ position:fixed; inset-block-start:0; inset-inline:0; z-index:80;
  transition:background .4s var(--ease), border-color .4s, backdrop-filter .4s, box-shadow .4s; }
.site-header.scrolled{ background:var(--glass); backdrop-filter:blur(18px) saturate(1.4);
  border-block-end:1px solid var(--border); box-shadow:0 8px 30px -22px rgba(40,40,90,.4); }
.nav{ display:flex; align-items:center; gap:24px; height:74px; }
.brand{ display:flex; align-items:center; gap:11px; font-weight:800; font-size:19px;
  letter-spacing:-.01em; }
.brand .logo{ width:34px; height:34px; border-radius:9px; background:var(--grad);
  display:grid; place-items:center; box-shadow:0 8px 18px -8px var(--glow); color:#fff;
  position:relative; overflow:hidden; }
.brand .logo svg{ width:20px; height:20px; }
.brand small{ display:block; font-size:10px; font-weight:500; letter-spacing:.2em;
  color:var(--faint); font-family:var(--mono); margin-top:-2px; }
.nav-links{ display:flex; align-items:center; gap:4px; margin-inline-start:auto; }
.nav-links a{ padding:9px 15px; border-radius:100px; font-size:15px; color:var(--muted);
  transition:color .25s, background .25s; }
.nav-links a:hover{ color:var(--indigo-ink); background:rgba(99,102,241,.09); }
.nav-cta{ display:flex; align-items:center; gap:10px; }
.nav-toggle{ display:none; width:42px; height:42px; border-radius:11px;
  border:1px solid var(--border-strong); background:var(--surface);
  color:var(--text); align-items:center; justify-content:center; }
@media(max-width:940px){
  .nav-links{ display:none; }
  .nav-toggle{ display:flex; }
  .nav-cta .btn-ghost{ display:none; }
}

/* mobile menu */
.mobile-menu{ position:fixed; inset:0; z-index:90; background:var(--glass-solid);
  backdrop-filter:blur(20px); display:flex; flex-direction:column; padding:28px;
  transform:translateY(-100%); transition:transform .5s var(--ease-out); }
.mobile-menu.open{ transform:translateY(0); }
.mobile-menu a{ font-size:26px; font-weight:700; padding:16px 0; border-bottom:1px solid var(--border); }
.mobile-menu .mm-top{ display:flex; justify-content:space-between; align-items:center; margin-bottom:24px; }

/* ---------- reveal-on-scroll ---------- */
.reveal{ opacity:0; transform:translateY(28px); transition:opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.in{ opacity:1; transform:none; }
.reveal[data-d="1"]{ transition-delay:.08s; }
.reveal[data-d="2"]{ transition-delay:.16s; }
.reveal[data-d="3"]{ transition-delay:.24s; }
.reveal[data-d="4"]{ transition-delay:.32s; }
@media(prefers-reduced-motion:reduce){
  .reveal{ opacity:1 !important; transform:none !important; }
  *{ animation-duration:.001ms !important; }
}

/* ---------- placeholder media ---------- */
.ph{ position:relative; overflow:hidden; border-radius:var(--r);
  background:
    repeating-linear-gradient(135deg, rgba(99,102,241,.06) 0 2px, transparent 2px 11px),
    linear-gradient(160deg, var(--surface-2), var(--bg-2));
  border:1px solid var(--border); display:grid; place-items:center; }
.ph .ph-label{ font-family:var(--mono); font-size:12px; color:var(--faint);
  letter-spacing:.1em; text-transform:uppercase; text-align:center; padding:8px 14px;
  border:1px dashed var(--border-strong); border-radius:8px; background:var(--glass); }

/* frost shimmer */
.frost{ position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(60% 50% at 70% 20%, rgba(6,182,212,.14), transparent 60%),
            radial-gradient(50% 60% at 20% 80%, rgba(168,85,247,.14), transparent 60%); }

/* ---------- footer ---------- */
.site-footer{ border-block-start:1px solid var(--border); background:linear-gradient(180deg, transparent, rgba(99,102,241,.05)); padding-block:64px 36px; }
.foot-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; }
@media(max-width:840px){ .foot-grid{ grid-template-columns:1fr 1fr; gap:30px; } }
@media(max-width:480px){ .foot-grid{ grid-template-columns:1fr; } }
.foot-col h5{ font-size:13px; font-family:var(--mono); letter-spacing:.12em; text-transform:uppercase;
  color:var(--faint); margin:0 0 16px; }
.foot-col a{ display:block; color:var(--muted); padding:5px 0; font-size:15px; transition:color .2s; }
.foot-col a:hover{ color:var(--indigo-ink); }
.foot-bottom{ display:flex; justify-content:space-between; align-items:center; gap:16px;
  margin-top:48px; padding-top:24px; border-top:1px solid var(--border); flex-wrap:wrap;
  font-size:13.5px; color:var(--faint); }

/* scrollbar */
::-webkit-scrollbar{ width:11px; height:11px; }
::-webkit-scrollbar-track{ background:var(--scroll-track); }
::-webkit-scrollbar-thumb{ background:var(--scroll-thumb); border-radius:10px; border:3px solid var(--scroll-track); }
::-webkit-scrollbar-thumb:hover{ background:var(--indigo); }

/* ============================================================
   DARK THEME  (cold deep-blue night mode)
   ============================================================ */
html[data-theme="dark"]{
  --bg:        #060b18;
  --bg-2:      #0a1226;
  --surface:   #0e1730;
  --surface-2: #101d3c;
  --surface-3: #17244c;
  --border:        rgba(99,160,255,.16);
  --border-strong: rgba(99,160,255,.30);

  --text:  #eaf1ff;
  --muted: #a3b2d6;
  --faint: #6f7ea8;

  --indigo-ink: #9fc0ff;

  --grad-soft: linear-gradient(120deg, rgba(6,182,212,.20), rgba(47,127,240,.22));
  --glow: rgba(56,140,255,.45);
  --glow-purple: rgba(56,189,248,.42);
  --shadow:    0 18px 44px -22px rgba(0,0,0,.7);
  --shadow-lg: 0 36px 84px -30px rgba(0,0,0,.82);

  --glass:       rgba(9,15,32,.72);
  --glass-2:     rgba(14,23,48,.92);
  --glass-solid: rgba(6,11,24,.97);
  --scroll-track:#0a1226;
  --scroll-thumb:#1d2c54;
}
html[data-theme="dark"] body::before{
  background:
    radial-gradient(120% 90% at 85% -10%, rgba(47,127,240,.22), transparent 55%),
    radial-gradient(95% 80% at 8% 0%, rgba(56,189,248,.16), transparent 52%),
    radial-gradient(80% 70% at 50% 112%, rgba(6,182,212,.12), transparent 60%),
    radial-gradient(60% 50% at 70% 40%, rgba(139,108,240,.10), transparent 60%),
    var(--bg);
}
html[data-theme="dark"] body::after{
  background-image:
    linear-gradient(rgba(99,160,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,160,255,.06) 1px, transparent 1px);
}
html[data-theme="dark"] ::selection{ background:rgba(56,140,255,.34); color:#fff; }
html{ transition:background .4s var(--ease); }
body, .site-header.scrolled, .card, .product-card, .service-card, .stat, .field input,
.field select, .field textarea, .btn-ghost, .hero-canister, .heroB .ro{
  transition:background-color .4s var(--ease), border-color .4s var(--ease), color .4s var(--ease), box-shadow .4s var(--ease);
}