/* ============================================================
   MainStream Studio — Da Nang
   Design system: dark cinematic / editorial
   ============================================================ */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@500;700;800&family=Onest:wght@400;500;600&display=swap');

/* ---------- Tokens ---------- */
:root {
  --bg:          #0a0810;
  --bg-elev:     #110e1a;
  --surface:     #16131f;
  --surface-2:   #1e1a2b;
  --line:        rgba(198,160,255,.11);
  --line-strong: rgba(198,160,255,.2);

  --text:        #f3f3f1;
  --text-dim:    #a6a1b5;
  --text-faint:  #6a6577;

  --accent:      #c46bff;   /* brand violet (readable on near-black) */
  --accent-hi:   #d79bff;
  --accent-dim:  rgba(176,80,255,.16);
  --grad:        linear-gradient(120deg, #7c3aed 0%, #b026e6 52%, #ec2fb0 100%);
  --grad-soft:   linear-gradient(120deg, rgba(124,58,237,.18), rgba(236,47,176,.14));

  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 14px;
  --radius-lg: 22px;

  --font-display: 'Unbounded', sans-serif;
  --font-body: 'Onest', -apple-system, BlinkMacSystemFont, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- Film grain overlay ---------- */
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Layout ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 10vw, 130px); position: relative; }
.section--tight { padding-block: clamp(48px, 7vw, 90px); }

/* ---------- Type ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.05; letter-spacing: -.02em; }
.display {
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.03em;
}
.h2 { font-size: clamp(1.9rem, 4vw, 3.1rem); }
.h3 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
.lead { font-size: clamp(1.05rem, 1.7vw, 1.3rem); color: var(--text-dim); max-width: 60ch; }
.muted { color: var(--text-dim); }
.accent { color: var(--accent); }

/* Section label: 01 — Услуги */
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-display);
  font-size: .8rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}
.eyebrow::before {
  content: attr(data-num);
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.eyebrow .bar { width: 34px; height: 1px; background: var(--line-strong); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 28px; border-radius: 100px;
  font-weight: 600; font-size: .98rem;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 8px 30px -8px rgba(176,38,230,.6); }
.btn--primary:hover { filter: brightness(1.08); box-shadow: 0 12px 40px -8px rgba(176,38,230,.7); }
.btn--ghost { border-color: var(--line-strong); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn__arrow { transition: transform .25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(10,8,16,.72);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.header.is-scrolled { border-bottom-color: var(--line); background: rgba(10,8,16,.9); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo__mark { flex-shrink: 0; transition: transform .4s var(--ease); }
.logo:hover .logo__mark { transform: rotate(-6deg) scale(1.05); }
.logo__word {
  font-family: var(--font-display); font-weight: 700; font-size: 1.16rem;
  letter-spacing: .01em; text-transform: uppercase;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.footer .logo__word { font-size: 1.05rem; }

.nav { display: flex; align-items: center; gap: 34px; }
.nav__links { display: flex; gap: 30px; }
.nav__links a { font-size: .95rem; color: var(--text-dim); transition: color .2s; position: relative; }
.nav__links a:hover, .nav__links a.is-active { color: var(--text); }
.nav__links a.is-active::after { content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px; background:var(--accent); border-radius:2px; }

/* Lang switcher */
.lang { display: flex; align-items: center; gap: 2px; border: 1px solid var(--line); border-radius: 100px; padding: 3px; }
.lang a { font-size: .8rem; font-weight: 600; padding: 5px 11px; border-radius: 100px; color: var(--text-faint); transition: all .2s; letter-spacing:.03em; }
.lang a:hover { color: var(--text); }
.lang a.is-active { background: var(--surface-2); color: var(--accent); }

.header__cta { display: inline-flex; }
.burger { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; align-items: center; justify-content: center; background: none; border: 1px solid var(--line); border-radius: 10px; }
.burger span { width: 18px; height: 2px; background: var(--text); transition: .25s; }

/* ---------- Hero ---------- */
.hero { position: relative; padding-top: clamp(48px, 9vw, 96px); padding-bottom: clamp(56px, 9vw, 110px); overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; opacity: .3; filter: saturate(.85) hue-rotate(-8deg); }
.hero__bg::after { content: ""; position: absolute; inset: 0; background:
  radial-gradient(60% 55% at 72% 15%, rgba(176,38,230,.28), transparent 60%),
  linear-gradient(180deg, rgba(10,8,16,.55) 0%, rgba(10,8,16,.74) 52%, var(--bg) 100%); }
.hero__glow {
  position: absolute; top: -18%; left: 50%; transform: translateX(-50%);
  width: 900px; height: 620px; pointer-events: none; z-index: 0;
  background: radial-gradient(closest-side, rgba(176,38,230,.28), rgba(124,58,237,.12) 45%, transparent 72%);
  filter: blur(10px);
}
.hero__inner { position: relative; z-index: 1; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 16px; border: 1px solid var(--line); border-radius: 100px;
  font-size: .82rem; color: var(--text-dim); margin-bottom: 30px;
  background: rgba(255,255,255,.02);
}
.hero__badge .pulse { width: 7px; height: 7px; border-radius: 50%; background: #46d17a; box-shadow: 0 0 0 3px rgba(70,209,122,.2); }
.hero h1 { margin-bottom: 26px; max-width: 15ch; }
.hero h1 .fx { color: var(--accent); }
.hero__lead { margin-bottom: 38px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 46px; padding-top: 30px; border-top: 1px solid var(--line); }
.hero__meta div { }
.hero__meta .n { font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; color: var(--text); }
.hero__meta .l { font-size: .82rem; color: var(--text-dim); }

/* ---------- Real photos ---------- */
.shot { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); border: 1px solid var(--line); display: block; }
.shot--tall { aspect-ratio: 4/5; }
.shot--wide { aspect-ratio: 16/10; }

/* ---------- Gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 200px; gap: 14px; }
.gallery a { position: relative; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--line); }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.gallery a:hover img { transform: scale(1.06); }
.gallery .g-tall { grid-row: span 2; }
.gallery .g-wide { grid-column: span 2; }
@media (max-width: 720px) {
  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 150px; }
  .gallery .g-wide { grid-column: span 2; }
}

/* ---------- Media placeholder ---------- */
.ph {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background:
    linear-gradient(135deg, rgba(176,38,230,.08), transparent 60%),
    repeating-linear-gradient(45deg, #141419 0 14px, #16161c 14px 28px);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  min-height: 220px; color: var(--text-faint);
  font-size: .82rem; text-align: center; padding: 20px;
}
.ph::before { content: "▶"; position: absolute; font-size: 2.4rem; opacity: .12; }
.ph span { position: relative; z-index: 1; max-width: 26ch; line-height:1.4; }
.ph--tall { min-height: 340px; }
.ph--wide { aspect-ratio: 16/9; min-height: unset; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: clamp(16px, 2vw, 22px); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 30px;
  transition: border-color .3s var(--ease), transform .3s var(--ease), background .3s var(--ease);
  position: relative; overflow: hidden;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-4px); background: var(--surface-2); }
.card__ic {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 20px;
  background: var(--accent-dim); color: var(--accent);
  font-size: 1.3rem;
}
.card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: .96rem; }
.card__num { position: absolute; top: 22px; right: 26px; font-family: var(--font-display); font-size: .8rem; color: var(--text-faint); }

/* ---------- Feature split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 6vw, 80px); align-items: center; }
.split--rev .split__media { order: -1; }

/* ---------- Equipment list ---------- */
.spec { display: grid; grid-template-columns: 1fr; gap: 14px; }
.spec__row {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 22px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); transition: border-color .3s var(--ease);
}
.spec__row:hover { border-color: var(--line-strong); }
.spec__tag { font-family: var(--font-display); font-size: .78rem; color: var(--accent); letter-spacing: .06em; text-transform: uppercase; min-width: 120px; padding-top:3px; }
.spec__body h4 { font-size: 1.05rem; margin-bottom: 5px; font-family: var(--font-body); font-weight: 600; letter-spacing: 0; }
.spec__body p { color: var(--text-dim); font-size: .93rem; }

/* ---------- Pricing ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.price {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 34px 30px; position: relative;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.price:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.price--feat { border-color: rgba(176,38,230,.5); background: linear-gradient(180deg, rgba(176,38,230,.1), var(--surface) 42%); }
.price__badge { position: absolute; top: 18px; right: 20px; font-size: .72rem; font-weight: 600; color: #191100; background: var(--accent); padding: 4px 11px; border-radius: 100px; letter-spacing:.02em; }
.price__name { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 6px; }
.price__sub { color: var(--text-dim); font-size: .9rem; margin-bottom: 22px; }
.price__amt { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }
.price__amt .cur { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; }
.price__amt .per { color: var(--text-dim); font-size: .95rem; }
.price__alt { color: var(--text-faint); font-size: .86rem; margin-bottom: 24px; }
.price__off { display:inline-block; color: var(--accent); font-size:.82rem; font-weight:600; margin-bottom:20px; background:var(--accent-dim); padding:3px 10px; border-radius:100px; }
.price ul.price__list { display: grid; gap: 11px; margin-bottom: 26px; }
.price__list li { display: flex; gap: 10px; font-size: .93rem; color: var(--text-dim); }
.price__list li::before { content: "✓"; color: var(--accent); font-weight: 700; }
.price .btn { width: 100%; justify-content: center; }

.pack-note { text-align: center; color: var(--text-dim); font-size: .95rem; margin-top: 26px; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; counter-reset: s; }
.step { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.step__n { font-family: var(--font-display); font-size: 2.4rem; font-weight: 800; color: var(--accent); opacity:.9; line-height:1; margin-bottom: 16px; }
.step h4 { font-size: 1.12rem; margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: .94rem; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #1a0f26, #0d0a14 62%);
  border: 1px solid var(--line-strong); border-radius: var(--radius-lg);
  padding: clamp(40px, 6vw, 72px); text-align: center;
}
.cta-band__glow { position:absolute; inset:0; background: radial-gradient(circle at 50% -20%, rgba(176,38,230,.32), transparent 55%); pointer-events:none; }
.cta-band h2 { margin-bottom: 18px; position: relative; }
.cta-band p { position: relative; margin-inline:auto; margin-bottom: 32px; }
.cta-band__btns { position: relative; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(30px,5vw,60px); }
.contact-list { display: grid; gap: 14px; }
.contact-item {
  display: flex; gap: 16px; align-items: center;
  padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.contact-item:hover { border-color: var(--accent); transform: translateX(4px); }
.contact-item__ic { width: 44px; height: 44px; border-radius: 11px; background: var(--accent-dim); color: var(--accent); display: grid; place-items: center; font-size: 1.2rem; flex-shrink:0; }
.contact-item .l { font-size: .8rem; color: var(--text-dim); }
.contact-item .v { font-weight: 600; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding-block: 56px 30px; margin-top: 30px; }
.footer__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 46px; }
.footer h5 { font-family: var(--font-display); font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 18px; font-weight:500; }
.footer__links { display: grid; gap: 11px; }
.footer__links a { color: var(--text-dim); font-size: .94rem; transition: color .2s; }
.footer__links a:hover { color: var(--accent); }
.footer__brand p { color: var(--text-dim); font-size: .94rem; max-width: 34ch; margin-top: 16px; }
.footer__bottom { display: flex; justify-content: space-between; align-items:center; flex-wrap: wrap; gap: 14px; padding-top: 26px; border-top: 1px solid var(--line); color: var(--text-faint); font-size: .85rem; }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }
[data-reveal][data-delay="3"] { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity:1; transform:none; transition:none; }
  .logo__dot::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding-top: clamp(50px,7vw,90px); padding-bottom: clamp(30px,5vw,50px); position: relative; }
.page-hero .glow { position:absolute; top:-30%; left:20%; width:600px; height:400px; background: radial-gradient(closest-side, rgba(176,38,230,.2), transparent 70%); pointer-events:none; }
.breadcrumb { font-size: .85rem; color: var(--text-faint); margin-bottom: 20px; display:flex; gap:8px; position:relative; }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; max-width: 820px; margin-inline:auto; }
.faq__item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.faq__q { width: 100%; text-align: left; background: none; border: none; color: var(--text); padding: 22px 24px; font-size: 1.05rem; font-weight: 600; display: flex; justify-content: space-between; gap: 16px; align-items:center; }
.faq__q .plus { color: var(--accent); font-size: 1.4rem; transition: transform .3s var(--ease); flex-shrink:0; }
.faq__item.is-open .faq__q .plus { transform: rotate(45deg); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq__a p { padding: 0 24px 24px; color: var(--text-dim); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav__links, .header__cta { display: none; }
  .burger { display: flex; }
  .split, .contact-grid { grid-template-columns: 1fr; }
  .split--rev .split__media { order: 0; }
  .grid--4 { grid-template-columns: repeat(2,1fr); }
  .grid--3 { grid-template-columns: 1fr; }
  .price-grid, .steps { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .split__media .ph { min-height: 260px; }

  /* Mobile menu */
  .nav { position: fixed; inset: 72px 0 auto 0; background: var(--bg-elev); border-bottom:1px solid var(--line); flex-direction: column; align-items: stretch; padding: 20px var(--gutter) 30px; gap: 20px; transform: translateY(-120%); transition: transform .35s var(--ease); z-index: 90; }
  .nav.is-open { transform: translateY(0); }
  .nav__links { flex-direction: column; gap: 4px; }
  .nav__links a { padding: 12px 0; font-size: 1.1rem; border-bottom: 1px solid var(--line); }
  .header__cta { display: inline-flex; }
  .nav .header__cta { display:inline-flex; }
  .nav .btn { justify-content:center; }
}
@media (max-width: 560px) {
  .grid--4, .grid--2 { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 30px; }
  .hero__meta { gap: 20px; }
  .lang { position: absolute; top: 20px; right: calc(var(--gutter) + 52px); }
}

/* ---------- Blog list ---------- */
.post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.post-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; transition: border-color .3s var(--ease), transform .3s var(--ease); }
.post-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.post-card__img { aspect-ratio: 16/9; object-fit: cover; width: 100%; }
.post-card__body { padding: 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card__tag { font-family: var(--font-display); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.post-card h3 { font-size: 1.22rem; line-height: 1.2; }
.post-card p { color: var(--text-dim); font-size: .95rem; flex: 1; }
.post-card__more { color: var(--accent); font-weight: 600; font-size: .92rem; }

/* ---------- Article (prose) ---------- */
.prose { max-width: 740px; margin-inline: auto; }
.prose > p { margin-bottom: 1.15em; color: var(--text-dim); font-size: 1.07rem; line-height: 1.78; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 2.05rem); margin: 1.7em 0 .5em; }
.prose h3 { font-size: 1.28rem; margin: 1.5em 0 .4em; font-family: var(--font-display); }
.prose ul, .prose ol { margin: 0 0 1.3em 1.1em; display: grid; gap: .55em; color: var(--text-dim); font-size: 1.05rem; line-height: 1.6; }
.prose li { padding-left: .2em; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--accent-hi); }
.prose strong { color: var(--text); font-weight: 600; }
.prose blockquote { border-left: 3px solid var(--accent); padding: .3em 0 .3em 1.3em; margin: 1.5em 0; color: var(--text); font-size: 1.15rem; }
.prose img { border-radius: var(--radius); margin: 1.6em 0; width: 100%; border: 1px solid var(--line); }
.prose figcaption { color: var(--text-faint); font-size: .85rem; text-align: center; margin-top: -1em; margin-bottom: 1.6em; }
.article-head { max-width: 740px; margin-inline: auto; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; color: var(--text-faint); font-size: .9rem; margin-top: 16px; }
.article-cta { max-width: 740px; margin: 40px auto 0; }
@media (max-width: 720px) { .post-list { grid-template-columns: 1fr; } }