/* ==========================================================================
   Kvantir — kvantir.uz
   Palette taken from the brand mark: deep navy ground, brushed silver,
   steel-blue accent with a cool glow.
   ========================================================================== */

:root {
  --navy-900: #101622;
  --navy-800: #141B29;
  --navy-700: #1B2436;
  --navy-600: #222D43;
  --navy-500: #2C3852;
  --line:     rgba(255,255,255,.09);
  --line-2:   rgba(255,255,255,.14);

  --silver:   #E6EAF0;
  --silver-2: #B9C1CE;
  --muted:    #8B97AA;

  --accent:   #7EA8F0;
  --accent-2: #4C6088;
  --accent-glow: rgba(126,168,240,.28);

  --radius:   16px;
  --radius-sm: 10px;
  --wrap:     1160px;

  --ease: cubic-bezier(.22,.61,.36,1);
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--silver-2);
  background: var(--navy-800);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3 { color: var(--silver); line-height: 1.15; margin: 0; letter-spacing: -.02em; font-weight: 800; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }
h3 { font-size: 1.125rem; font-weight: 700; letter-spacing: -.01em; }
p  { margin: 0; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 22px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--navy-900); padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px; border-radius: 999px; border: 1px solid transparent;
  font-weight: 700; font-size: .95rem; letter-spacing: -.01em;
  cursor: pointer; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
  white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: .875rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(180deg, #8FB4F5, #5C7AB8);
  color: #0D1420;
  box-shadow: 0 6px 22px -8px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -10px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,.4); }
.btn-primary:disabled { opacity: .55; transform: none; cursor: not-allowed; }

.btn-ghost { border-color: var(--line-2); color: var(--silver); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--accent); background: rgba(126,168,240,.08); transform: translateY(-2px); }

/* ---------- header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(16,22,34,.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-name {
  font-weight: 800; font-size: 1.22rem; letter-spacing: -.045em; color: var(--silver);
  background: linear-gradient(180deg, #FFFFFF, #A9B4C6);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.brand-name sup { font-size: .5em; letter-spacing: .06em; color: var(--accent); -webkit-text-fill-color: var(--accent); margin-left: 1px; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav > a:not(.btn) { font-size: .93rem; font-weight: 500; color: var(--silver-2); transition: color .2s; position: relative; }
.nav > a:not(.btn)::after {
  content: ''; position: absolute; left: 0; bottom: -5px; height: 1.5px; width: 0;
  background: var(--accent); transition: width .25s var(--ease);
}
.nav > a:not(.btn):hover { color: var(--silver); }
.nav > a:not(.btn):hover::after { width: 100%; }

.header-tools { display: flex; align-items: center; gap: 14px; }

.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: rgba(255,255,255,.03); }
.lang button {
  background: none; border: 0; cursor: pointer; padding: 5px 11px; border-radius: 999px;
  font-size: .76rem; font-weight: 700; letter-spacing: .04em; color: var(--muted); transition: all .2s;
}
.lang button:hover { color: var(--silver); }
.lang button.is-active { background: rgba(126,168,240,.16); color: var(--accent); }

.burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--silver); border-radius: 2px; transition: transform .3s var(--ease), opacity .2s; }
.burger span + span { margin-top: 5px; }
.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); }

/* ---------- hero ---------- */
.hero { position: relative; padding: 150px 0 100px; overflow: hidden; }
.hero-glow {
  position: absolute; top: -18%; left: 50%; transform: translateX(-50%);
  width: min(1100px, 130vw); aspect-ratio: 1.4; pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(126,168,240,.22), rgba(126,168,240,.06) 42%, transparent 68%);
}
.hero::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 75%);
  opacity: .5;
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center; }

.eyebrow {
  display: inline-block; font-size: .74rem; font-weight: 700; letter-spacing: .19em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.hero h1 em { font-style: normal; background: linear-gradient(120deg, #A9C6FF, #6E8FD4); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.lead { font-size: clamp(1rem, 1.6vw, 1.14rem); color: var(--muted); max-width: 46ch; margin-top: 20px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero-points { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 40px; }
.hero-points li { position: relative; padding-left: 24px; font-size: .9rem; color: var(--muted); }
.hero-points li::before {
  content: ''; position: absolute; left: 0; top: .55em; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent-glow);
}

/* animated brand dot grid */
.hero-visual { display: flex; justify-content: center; }
.dot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 5vw, 34px); }
.dot-grid span {
  width: clamp(54px, 14vw, 76px); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, #FBFCFD, #D3D9E1 45%, #949DAC);
  box-shadow: 0 8px 20px -8px rgba(0,0,0,.7), inset 0 -1px 2px rgba(0,0,0,.25);
  animation: float 6s ease-in-out infinite;
}
.dot-grid span.on {
  background: radial-gradient(circle at 50% 50%, #7C93C4, #46587E 55%, #29344F);
  box-shadow: 0 0 34px 4px var(--accent-glow), 0 8px 20px -8px rgba(0,0,0,.7), inset 0 0 0 1px rgba(159,196,255,.4);
  animation: float 6s ease-in-out infinite, pulse 3.6s ease-in-out infinite;
}
.dot-grid span:nth-child(2) { animation-delay: .2s; }
.dot-grid span:nth-child(3) { animation-delay: .4s; }
.dot-grid span:nth-child(4) { animation-delay: .1s; }
.dot-grid span:nth-child(5) { animation-delay: .3s; }
.dot-grid span:nth-child(6) { animation-delay: .5s; }
.dot-grid span:nth-child(7) { animation-delay: .25s; }
.dot-grid span:nth-child(8) { animation-delay: .45s; }
.dot-grid span:nth-child(9) { animation-delay: .6s; }

@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes pulse { 0%,100% { box-shadow: 0 0 30px 2px var(--accent-glow), 0 8px 20px -8px rgba(0,0,0,.7), inset 0 0 0 1px rgba(159,196,255,.4); }
                   50%     { box-shadow: 0 0 46px 8px var(--accent-glow), 0 8px 20px -8px rgba(0,0,0,.7), inset 0 0 0 1px rgba(159,196,255,.6); } }

/* ---------- sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: linear-gradient(180deg, var(--navy-900), var(--navy-800)); border-block: 1px solid var(--line); }
.section-head { max-width: 620px; margin-bottom: 52px; }
.section-sub { color: var(--muted); margin-top: 14px; font-size: 1.02rem; }

/* ---------- cards ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: linear-gradient(160deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; inset: 0; opacity: 0; transition: opacity .3s var(--ease); pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(126,168,240,.1), transparent 60%);
}
.card:hover { transform: translateY(-5px); border-color: rgba(126,168,240,.32); box-shadow: 0 22px 45px -24px rgba(0,0,0,.85); }
.card:hover::before { opacity: 1; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: .945rem; }

.card-icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 20px;
  background: linear-gradient(160deg, rgba(126,168,240,.18), rgba(126,168,240,.05));
  border: 1px solid rgba(126,168,240,.24); color: var(--accent);
}
.card-icon svg { width: 22px; height: 22px; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: s; }
.step { position: relative; padding-top: 26px; border-top: 1px solid var(--line-2); }
.step::after {
  content: ''; position: absolute; top: -1px; left: 0; width: 34px; height: 2px;
  background: var(--accent); box-shadow: 0 0 12px var(--accent-glow);
}
.step-num { display: block; font-size: .8rem; font-weight: 800; letter-spacing: .14em; color: var(--accent-2); margin-bottom: 12px; }
.step h3 { margin-bottom: 10px; }
.step p { color: var(--muted); font-size: .93rem; }

/* ---------- chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips span {
  padding: 9px 17px; border-radius: 999px; border: 1px solid var(--line-2);
  background: rgba(255,255,255,.03); font-size: .875rem; font-weight: 600; color: var(--silver-2);
  transition: all .22s var(--ease);
}
.chips span:hover { border-color: var(--accent); color: var(--accent); background: rgba(126,168,240,.09); transform: translateY(-2px); }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: start; }
.values { display: grid; grid-template-columns: 1fr 1fr; gap: 30px 34px; }
.value h3 { margin-bottom: 9px; }
.value p { color: var(--muted); font-size: .93rem; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }

.contact-list { margin-top: 36px; display: grid; gap: 16px; }
.contact-list li { display: flex; align-items: center; gap: 14px; font-size: .97rem; }
.ci {
  width: 40px; height: 40px; flex: none; border-radius: 11px; display: grid; place-items: center;
  border: 1px solid var(--line-2); background: rgba(255,255,255,.03); color: var(--accent);
}
.ci svg { width: 19px; height: 19px; stroke-linecap: round; stroke-linejoin: round; }
.contact-list a { transition: color .2s; }
.contact-list a:hover { color: var(--accent); }

.form { padding: 32px 28px; }
.form:hover { transform: none; border-color: var(--line); box-shadow: none; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: .85rem; font-weight: 600; color: var(--silver-2); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border-radius: var(--radius-sm);
  background: rgba(0,0,0,.28); border: 1px solid var(--line-2); color: var(--silver);
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input::placeholder, .field textarea::placeholder { color: #5C6879; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); background: rgba(0,0,0,.4);
  box-shadow: 0 0 0 3px rgba(126,168,240,.14);
}
.field select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238B97AA' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 17px; padding-right: 42px;
}
.field select option { background: var(--navy-700); color: var(--silver); }

.field.invalid input, .field.invalid textarea { border-color: #E0798A; }
.err { display: block; font-size: .8rem; color: #E0798A; margin-top: 6px; min-height: 0; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status { margin-top: 14px; font-size: .9rem; text-align: center; min-height: 1.4em; }
.form-status.ok  { color: #7FD6A8; }
.form-status.bad { color: #E0798A; }
.form-note { margin-top: 12px; font-size: .78rem; color: #5C6879; text-align: center; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--navy-900); padding: 40px 0; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand > div { display: flex; flex-direction: column; line-height: 1.3; }
.footer-tag { font-size: .72rem; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: .9rem; }
.footer-nav a { color: var(--muted); transition: color .2s; }
.footer-nav a:hover { color: var(--accent); }
.copy { font-size: .82rem; color: #5C6879; }

/* ---------- reveal on scroll ----------
   Scoped to .js so that if JavaScript fails to load the content is still
   visible instead of stuck at opacity 0. */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 52px; }
  .hero-visual { order: -1; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; gap: 34px 22px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 76px; }
  .burger { display: block; }
  .nav {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px; padding: 18px 22px 26px;
    background: rgba(16,22,34,.97); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .25s var(--ease), transform .25s var(--ease);
  }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav > a:not(.btn) { padding: 13px 2px; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav > a:not(.btn)::after { display: none; }
  .nav .btn { margin-top: 14px; }

  .hero { padding: 120px 0 72px; }
  .section { padding: 72px 0; }
  .grid-3, .values { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { flex: 1 1 auto; }
}

@media (max-width: 380px) {
  .lang button { padding: 5px 8px; font-size: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}