/* ════════════════════════════════════════════════════════════════════════
   Codivion Tech · company site
   One accent (logo cobalt), cool neutrals, Satoshi + Instrument Serif italics.
   Dark ink bookends (hero, process, contact, footer) on a light page.
   ════════════════════════════════════════════════════════════════════════ */
:root {
  --bg: #F6F7FA;
  --tint: #EEF1F6;
  --surface: #FFFFFF;
  --ink: #0B1020;
  --ink-2: #283047;
  --muted: #5A6278;
  --line: rgba(11, 16, 32, .09);
  --line-2: rgba(11, 16, 32, .16);
  --accent: #2D5BFF;
  --accent-ink: #1E45DB;
  --accent-soft: rgba(45, 91, 255, .08);
  --night: #0A0F1F;
  --night-2: #111831;
  --on-night: #EDF0F8;
  --on-night-2: #A7B0C8;
  --night-line: rgba(255, 255, 255, .1);
  --sky: #7FA2FF;
  --sh-card: 0 1px 0 rgba(255, 255, 255, .9) inset, 0 24px 48px -32px rgba(20, 38, 96, .3), 0 2px 6px -3px rgba(20, 38, 96, .08);
  --sh-float: 0 50px 90px -40px rgba(3, 8, 30, .75), 0 18px 36px -24px rgba(3, 8, 30, .6);
  --sans: "Satoshi", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --wrap: 1240px;
  --gut: 24px;
  --z-hd: 50;
  --z-float: 40;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body { background: var(--bg); color: var(--ink); font: 400 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: 16px; top: -60px; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 10px; z-index: 100; }
.skip:focus { top: 16px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut); }

h1, h2, h3 { font-weight: 700; letter-spacing: -.025em; line-height: 1.08; text-wrap: balance; }
h2 { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.4rem); letter-spacing: -.035em; }
h3 { font-size: 1.2rem; letter-spacing: -.015em; line-height: 1.25; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
h2 em { color: var(--accent); }
.sec-ink h2 em, .hero h1 em { color: var(--sky); }
p { text-wrap: pretty; }

.kicker { font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.kicker::before { content: ""; width: 22px; height: 1.5px; background: currentColor; }
.sub { color: var(--muted); font-size: 1.08rem; max-width: 56ch; }

/* ── buttons ── */
.btn { display: inline-flex; align-items: center; gap: 10px; height: 52px; padding: 0 26px; border-radius: 999px; font-weight: 700; font-size: .98rem; letter-spacing: -.005em; transition: transform .25s var(--ease), background-color .25s, box-shadow .25s, color .25s, border-color .25s; white-space: nowrap; }
.btn:active { transform: scale(.97); }
.btn i { font-size: 1.05em; transition: transform .25s var(--ease); }
.btn:hover i.ph-arrow-right, .btn:hover i.ph-arrow-up-right { transform: translateX(3px); }
.btn-sm { height: 42px; padding: 0 18px; font-size: .9rem; }
.btn-light { background: #fff; color: var(--night); box-shadow: 0 10px 30px -12px rgba(127, 162, 255, .55); }
.btn-light:hover { background: #E8EEFF; }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 14px 30px -14px rgba(45, 91, 255, .9); }
.btn-accent:hover { background: #3F69FF; }
.btn-line { border: 1px solid var(--night-line); color: var(--on-night); background: rgba(255, 255, 255, .03); }
.btn-line:hover { border-color: rgba(255, 255, 255, .3); background: rgba(255, 255, 255, .07); }
.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--on-night); padding: 6px 2px; border-bottom: 1px solid rgba(255, 255, 255, .25); transition: border-color .25s, gap .25s var(--ease); }
.link-arrow:hover { border-color: currentColor; gap: 12px; }
.link-arrow.dark { color: var(--ink); border-color: var(--line-2); margin-top: 28px; }

/* ── header ── */
.hd { position: fixed; inset: 0 0 auto; z-index: var(--z-hd); color: var(--on-night); transition: background-color .3s, box-shadow .3s, backdrop-filter .3s; }
.hd.is-stuck { background: rgba(10, 15, 31, .78); backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4); box-shadow: 0 1px 0 var(--night-line); }
.hd-in { height: 76px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.12rem; letter-spacing: -.02em; }
.brand span { color: var(--sky); font-weight: 500; margin-left: -5px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { padding: 8px 14px; border-radius: 999px; font-weight: 500; font-size: .95rem; color: var(--on-night-2); transition: color .2s, background-color .2s; }
.nav a:hover { color: #fff; }
.nav a.is-on { color: #fff; background: rgba(255, 255, 255, .08); }
.hd-end { display: flex; align-items: center; gap: 10px; }
.menu-btn { display: none; width: 44px; height: 44px; border-radius: 12px; font-size: 1.4rem; color: #fff; border: 1px solid var(--night-line); align-items: center; justify-content: center; }
.drawer { display: none; }

/* ── hero ── */
.hero { position: relative; background: var(--night); color: var(--on-night); padding: 150px 0 0; overflow: hidden; isolation: isolate; }
.hero-bg, .ink-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 55% at 78% 30%, rgba(45, 91, 255, .32), transparent 70%),
    radial-gradient(40% 40% at 8% 90%, rgba(92, 230, 255, .1), transparent 70%),
    linear-gradient(180deg, #0A0F1F, #0B1226 70%, #0A0F1F); }
.hero-bg::after, .ink-bg::after { content: ""; position: absolute; inset: 0; opacity: .5;
  background-image: linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: radial-gradient(70% 70% at 60% 30%, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(70% 70% at 60% 30%, #000 20%, transparent 75%); }
.hero-in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: .88rem; font-weight: 500; color: var(--on-night-2); border: 1px solid var(--night-line); background: rgba(255, 255, 255, .04); padding: 7px 14px 7px 12px; border-radius: 999px; margin-bottom: 28px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #4ADE95; box-shadow: 0 0 0 4px rgba(74, 222, 149, .18); }
.hero h1 { font-size: clamp(2.6rem, 1.5rem + 4.2vw, 4.9rem); letter-spacing: -.045em; line-height: 1.02; }
.hero h1 em { letter-spacing: -.02em; }
.lede { font-size: 1.14rem; color: var(--on-night-2); margin-top: 26px; max-width: 54ch; }
.hero-cta { display: flex; align-items: center; gap: 28px; margin-top: 38px; flex-wrap: wrap; }

.hero-art { position: relative; aspect-ratio: 1 / .86; }
.frame { border-radius: 14px; overflow: hidden; background: #fff; box-shadow: var(--sh-float); }
.frame-bar { height: 30px; display: flex; align-items: center; gap: 6px; padding: 0 12px; background: #EEF1F6; border-bottom: 1px solid rgba(11, 16, 32, .07); }
.frame-bar i { width: 9px; height: 9px; border-radius: 50%; background: #CBD2DF; }
.frame-bar span { margin: 0 auto; font-size: .7rem; color: #6B7389; background: #fff; padding: 2px 14px; border-radius: 6px; transform: translateX(-18px); }
.hero-art .frame-browser { position: absolute; top: 0; right: 0; width: 88%; transform: rotate(-1deg); }
.hero-art .frame-dark { position: absolute; left: 0; bottom: 4%; width: 52%; border: 1px solid rgba(255, 255, 255, .12); transform: rotate(1.5deg); }
.frame-phone { position: absolute; right: 3%; bottom: -2%; width: 27%; filter: drop-shadow(0 40px 50px rgba(3, 8, 30, .7)); transform: rotate(3deg); }
.frame-phone img { border-radius: 30px; }

.hero-facts { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 96px; border-top: 1px solid var(--night-line); }
.hero-facts li { padding: 28px 24px 34px 0; display: flex; flex-direction: column; gap: 4px; }
.hero-facts li + li { padding-left: 24px; border-left: 1px solid var(--night-line); }
.hero-facts strong { font-size: 1.05rem; font-weight: 700; color: #fff; }
.hero-facts span { color: var(--on-night-2); font-size: .93rem; }

/* ── stack marquee ── */
.stack { padding: 44px 0; border-bottom: 1px solid var(--line); background: var(--surface); }
.stack-label { text-align: center; font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 22px; }
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; width: max-content; gap: 56px; animation: slide 46s linear infinite; }
.marquee-track span { font-size: 1.35rem; font-weight: 700; letter-spacing: -.02em; color: #9AA2B6; white-space: nowrap; }
@keyframes slide { to { transform: translateX(calc(-50% - 28px)); } }

/* ── sections ── */
.sec { padding: 128px 0 136px; position: relative; }
.sec-tint { background: var(--tint); }
.sec-ink { background: var(--night); color: var(--on-night); isolation: isolate; overflow: hidden; }
.sec-ink .sub { color: var(--on-night-2); }
.sec-ink .kicker { color: var(--sky); }
.sec-head { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: end; margin-bottom: 64px; }
.sec-head .sub { justify-self: end; }

/* services */
.svc-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; align-items: start; }
.svc-head { position: sticky; top: 120px; }
.svc-head .sub { margin-top: 22px; }
.svc-list { border-top: 1px solid var(--line-2); }
.svc { display: grid; grid-template-columns: 56px 1fr 40px; gap: 20px; padding: 34px 8px 34px 0; border-bottom: 1px solid var(--line-2); transition: background-color .3s, padding .35s var(--ease); border-radius: 4px; }
.svc:hover { background: var(--surface); padding-left: 20px; padding-right: 20px; }
.svc-n { font-family: var(--serif); font-style: italic; font-size: 1.5rem; color: var(--accent); line-height: 1.1; }
.svc h3 { font-size: 1.45rem; }
.svc p { color: var(--muted); margin-top: 10px; max-width: 58ch; }
.svc-ico { font-size: 1.7rem; color: #A3AABC; transition: color .3s, transform .35s var(--ease); }
.svc:hover .svc-ico { color: var(--accent); transform: rotate(-8deg) scale(1.08); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tags li { font-size: .78rem; font-weight: 500; color: var(--ink-2); background: var(--tint); border: 1px solid var(--line); padding: 3px 10px; border-radius: 6px; }
.svc:hover .tags li { background: var(--bg); }

/* work */
.case { background: var(--surface); border-radius: 26px; box-shadow: var(--sh-card); overflow: hidden; }
.case-type { font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.case h3 { font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.3rem); margin: 10px 0 14px; letter-spacing: -.03em; }
.case-body > p:not(.case-type) { color: var(--muted); max-width: 60ch; }
.case-facts { margin-top: 26px; display: grid; gap: 14px; border-top: 1px solid var(--line); padding-top: 22px; }
.case-facts div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; font-size: .94rem; }
.case-facts dt { color: var(--muted); }
.case-facts dd { font-weight: 500; }
.case-feature { display: grid; grid-template-columns: 1.25fr .75fr; align-items: center; }
.case-feature .case-media { position: relative; overflow: hidden; padding: 56px 0 90px 56px; background: linear-gradient(135deg, #DCE5FF, #EEF2FF 60%, #E6F4FF); min-height: 100%; }
.case-feature .case-media .frame { position: relative; z-index: 1; width: 88%; }
.case-feature .case-media-back { position: absolute !important; z-index: 0 !important; right: 3%; bottom: 30px; width: 50% !important; transform: rotate(2deg); }
.case-feature .case-body { padding: 56px; }
.case-feature .frame, .case-wide .frame { box-shadow: 0 40px 70px -40px rgba(20, 38, 96, .55), 0 0 0 1px rgba(11, 16, 32, .06); }
.case-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 24px; }
.case-row .case { display: flex; flex-direction: column; }
.case-row .case-body { padding: 40px 44px 44px; flex: 1; }
.case-app .case-media { background: linear-gradient(160deg, #E4F6FF, #EEEAFF); display: flex; justify-content: center; gap: 22px; padding: 44px 32px 0; height: 380px; overflow: hidden; }
.case-app .phones img { width: 42%; max-width: 200px; height: auto; align-self: flex-start; border-radius: 26px; filter: drop-shadow(0 30px 40px rgba(20, 38, 96, .3)); transition: transform .6s var(--ease); }
.case-app .phones img:nth-child(2) { margin-top: 44px; }
.case-app:hover .phones img:first-child { transform: translateY(-8px); }
.case-app:hover .phones img:nth-child(2) { transform: translateY(-14px); }
.case-ai .case-media { background: radial-gradient(80% 90% at 70% 20%, #1F3A99, #0A0F1F 70%); height: 380px; padding: 48px 0 0 44px; overflow: hidden; }
.case-ai .frame { width: 128%; border: 1px solid rgba(255, 255, 255, .12); border-radius: 12px; transition: transform .6s var(--ease); }
.case-ai:hover .frame { transform: translate(-10px, -8px); }
.case-wide { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; margin-top: 24px; }
.case-wide .case-body { padding: 56px; }
.case-wide .case-media { padding: 48px 48px 48px 0; }
.case .frame img { transition: transform .8s var(--ease); }
.case-feature:hover .case-media > .frame:first-child img, .case-wide:hover .frame img { transform: scale(1.015); }

/* who */
.who { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.who-card { padding: 34px 28px 36px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s, border-color .35s; }
.who-card:hover { transform: translateY(-4px); box-shadow: var(--sh-card); border-color: transparent; }
.who-card i { font-size: 1.9rem; color: var(--accent); display: inline-flex; width: 56px; height: 56px; align-items: center; justify-content: center; border-radius: 16px; background: var(--accent-soft); margin-bottom: 26px; }
.who-card p { color: var(--muted); margin-top: 12px; font-size: .97rem; }
.who-card:nth-child(even) { margin-top: 40px; }

/* process */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: s; position: relative; }
.steps::before { content: ""; position: absolute; top: 27px; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--sky), rgba(127, 162, 255, .1)); }
.step { padding-right: 28px; position: relative; }
.step-n { display: inline-flex; width: 56px; height: 56px; border-radius: 50%; align-items: center; justify-content: center; font-family: var(--serif); font-style: italic; font-size: 1.35rem; color: #fff; background: var(--night-2); border: 1px solid rgba(127, 162, 255, .45); margin-bottom: 26px; position: relative; box-shadow: 0 0 0 8px var(--night); }
.step h3 { color: #fff; }
.step p { color: var(--on-night-2); margin-top: 10px; font-size: .96rem; }

/* engagement */
.models { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.model { padding: 40px 36px; border-radius: 24px; background: var(--surface); border: 1px solid var(--line); display: flex; flex-direction: column; transition: box-shadow .35s, transform .35s var(--ease); }
.model:hover { box-shadow: var(--sh-card); transform: translateY(-3px); }
.model:first-child { background: var(--night); color: var(--on-night); border-color: transparent; }
.model:first-child p:not(.model-tag), .model:first-child .checks li { color: var(--on-night-2); }
.model:first-child .model-tag { color: var(--sky); background: rgba(127, 162, 255, .12); }
.model-tag { align-self: flex-start; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: 5px 10px; border-radius: 6px; margin-bottom: 26px; }
.model h3 { font-size: 1.55rem; }
.model > p:not(.model-tag) { color: var(--muted); margin-top: 12px; }
.checks { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); display: grid; gap: 12px; }
.model:first-child .checks { border-color: var(--night-line); }
.checks li { display: flex; gap: 10px; align-items: baseline; color: var(--ink-2); font-size: .96rem; }
.checks li::before { content: ""; flex: none; width: 14px; height: 8px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg) translateY(-3px); }
.model:first-child .checks li::before { border-color: var(--sky); }

/* why */
.why { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.why-head .sub { margin-top: 22px; }
.why-list { display: grid; grid-template-columns: 1fr 1fr; gap: 44px 40px; }
.why-list li { display: flex; gap: 18px; }
.why-list i { flex: none; font-size: 1.6rem; color: var(--accent); margin-top: 2px; }
.why-list p { color: var(--muted); margin-top: 8px; font-size: .97rem; }

/* about */
.about { display: grid; grid-template-columns: .8fr 1.2fr; gap: 88px; align-items: center; }
.about-photo { position: relative; }
.about-photo img { width: 100%; aspect-ratio: 4 / 4.6; object-fit: cover; border-radius: 28px; box-shadow: var(--sh-card); }
.about-card { position: absolute; left: 24px; bottom: 24px; right: 24px; padding: 16px 20px; border-radius: 16px; background: rgba(10, 15, 31, .72); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); color: #fff; border: 1px solid rgba(255, 255, 255, .14); display: flex; flex-direction: column; }
.about-card span { color: var(--on-night-2); font-size: .9rem; }
.about-body blockquote { font-family: var(--serif); font-style: italic; font-size: clamp(1.4rem, 1.1rem + .9vw, 1.9rem); line-height: 1.35; color: var(--ink-2); margin: 32px 0 24px; padding-left: 24px; border-left: 2px solid var(--accent); }
.about-body > p:not(.kicker) { color: var(--muted); max-width: 60ch; }
.disciplines { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 34px; }
.disciplines li { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); font-weight: 500; font-size: .94rem; }
.disciplines i { font-size: 1.25rem; color: var(--accent); }

/* faq */
.faq { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.faq-head { position: sticky; top: 120px; }
.faq-head .sub { margin-top: 22px; }
.faq-list { border-top: 1px solid var(--line-2); }
.faq-list details { border-bottom: 1px solid var(--line-2); }
.faq-list summary { list-style: none; cursor: pointer; padding: 26px 48px 26px 0; font-weight: 700; font-size: 1.12rem; letter-spacing: -.01em; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-size: 1.6rem; font-weight: 400; color: var(--accent); transition: transform .3s var(--ease); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list details p { color: var(--muted); padding: 0 48px 28px 0; max-width: 64ch; }

/* contact */
.contact-in { display: grid; grid-template-columns: .9fr 1.1fr; gap: 72px; align-items: start; }
.contact-copy .sub { margin-top: 22px; }
.contact-list { margin-top: 44px; display: grid; gap: 22px; }
.contact-list li { display: flex; gap: 16px; align-items: flex-start; }
.contact-list i { font-size: 1.3rem; color: var(--sky); width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(127, 162, 255, .1); flex: none; }
.contact-list span { display: block; font-size: .82rem; color: var(--on-night-2); }
.contact-list a, .contact-list p { font-weight: 500; color: #fff; }
.contact-list a:hover { color: var(--sky); }
.form { background: rgba(255, 255, 255, .04); border: 1px solid var(--night-line); border-radius: 26px; padding: 40px; backdrop-filter: blur(8px); box-shadow: 0 1px 0 rgba(255, 255, 255, .06) inset; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.field label { font-size: .88rem; font-weight: 500; color: var(--on-night-2); }
.field label em { font-family: var(--sans); font-style: normal; opacity: .65; font-size: .82rem; }
.field input, .field select, .field textarea { width: 100%; background: rgba(10, 15, 31, .6); border: 1px solid var(--night-line); border-radius: 12px; padding: 13px 14px; color: #fff; transition: border-color .2s, box-shadow .2s; }
.field select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, #A7B0C8 50%), linear-gradient(135deg, #A7B0C8 50%, transparent 50%); background-position: calc(100% - 20px) 55%, calc(100% - 15px) 55%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 38px; }
.field select option { color: var(--ink); }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--sky); box-shadow: 0 0 0 4px rgba(127, 162, 255, .15); }
.field .err { display: none; font-size: .84rem; color: #FF9B9B; }
.field.bad input, .field.bad select, .field.bad textarea { border-color: #FF8080; }
.field.bad .err { display: block; }
.send { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.form-ok { display: none; margin-top: 18px; gap: 10px; align-items: flex-start; color: #9BF0C4; font-size: .94rem; }
.form-ok.show { display: flex; }
.form-ok i { font-size: 1.2rem; margin-top: 2px; }

/* footer */
.ft { background: var(--night); color: var(--on-night-2); border-top: 1px solid var(--night-line); padding: 64px 0 28px; }
.ft-in { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; align-items: start; }
.ft .brand { color: #fff; }
.ft-brand p { margin-top: 14px; max-width: 40ch; font-size: .94rem; }
.ft-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; font-size: .95rem; }
.ft-nav a:hover, .ft-contact a:hover { color: #fff; }
.ft-contact { display: grid; gap: 10px; font-size: .95rem; }
.ft-base { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--night-line); font-size: .86rem; }

.wa-float { position: fixed; right: 22px; bottom: 22px; z-index: var(--z-float); width: 56px; height: 56px; border-radius: 50%; background: #1FAF5B; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.7rem; box-shadow: 0 16px 30px -12px rgba(15, 110, 55, .7); transition: transform .3s var(--ease); }
.wa-float:hover { transform: translateY(-3px) scale(1.04); }

/* reveal */
.js .rv { opacity: 0; transform: translateY(22px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: calc(var(--d, 0) * 90ms); }
.js .rv.in { opacity: 1; transform: none; }
.js .hero-art.rv { transform: translateY(30px) scale(.98); }
.js .hero-art.rv.in { transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .rv { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
}

/* ── responsive ── */
@media (max-width: 1080px) {
  .hero-in { grid-template-columns: 1fr; gap: 64px; }
  .hero-art { max-width: 720px; width: 100%; margin: 0 auto; }
  .svc-grid, .why, .faq, .about, .contact-in { grid-template-columns: 1fr; gap: 48px; }
  .svc-head, .faq-head { position: static; }
  .case-feature, .case-wide { grid-template-columns: 1fr; }
  .case-wide .case-media { padding: 0 32px 40px; order: 2; }
  .who { grid-template-columns: 1fr 1fr; }
  .who-card:nth-child(even) { margin-top: 0; }
  .steps { grid-template-columns: 1fr; gap: 34px; }
  .steps::before { top: 0; bottom: 0; left: 27px; right: auto; width: 1px; height: auto; background: linear-gradient(180deg, var(--sky), rgba(127, 162, 255, .1)); }
  .step { display: grid; grid-template-columns: 56px 1fr; column-gap: 24px; padding: 0; }
  .step-n { grid-row: span 2; margin: 0; }
  .step p { margin-top: 6px; }
  .models { grid-template-columns: 1fr; }
  .about-photo { max-width: 420px; }
}
@media (max-width: 860px) {
  .nav, .hd-end .btn { display: none; }
  .menu-btn { display: inline-flex; margin-left: auto; }
  .hd-end { margin-left: auto; }
  .drawer { display: grid; position: absolute; top: 76px; left: 0; right: 0; background: rgba(10, 15, 31, .97); backdrop-filter: blur(14px); padding: 8px 24px 24px; border-bottom: 1px solid var(--night-line); transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity .25s, transform .25s var(--ease), visibility .25s; }
  .drawer.open { opacity: 1; transform: none; visibility: visible; }
  .drawer a { padding: 14px 0; border-bottom: 1px solid var(--night-line); font-weight: 500; font-size: 1.05rem; }
  .sec-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 44px; }
  .sec-head .sub { justify-self: start; }
  .hero-facts { grid-template-columns: 1fr 1fr; margin-top: 64px; }
  .hero-facts li { padding: 22px 16px 24px 0; }
  .hero-facts li + li { padding-left: 0; border-left: 0; }
  .hero-facts li:nth-child(even) { padding-left: 16px; border-left: 1px solid var(--night-line); }
  .hero-facts li:nth-child(n+3) { border-top: 1px solid var(--night-line); }
  .case-row { grid-template-columns: 1fr; }
  .why-list { grid-template-columns: 1fr; gap: 32px; }
  .disciplines { grid-template-columns: 1fr 1fr; }
  .ft-in { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  :root { --gut: 16px; }
  .hero { padding-top: 120px; }
  .sec { padding: 88px 0 96px; }
  .hero-cta { gap: 20px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts li, .hero-facts li:nth-child(even) { padding: 18px 0; border-left: 0; }
  .hero-facts li + li { border-top: 1px solid var(--night-line); }
  .who { grid-template-columns: 1fr; }
  .svc { grid-template-columns: 40px 1fr; }
  .svc-ico { display: none; }
  .svc:hover { padding-left: 8px; padding-right: 8px; }
  .case-feature .case-media { padding: 28px 0 56px 20px; }
  .case-feature .case-body, .case-wide .case-body, .case-row .case-body { padding: 30px 24px 34px; }
  .case-wide .case-media { padding: 0 20px 28px; }
  .case-app .case-media, .case-ai .case-media { height: 300px; }
  .case-ai .case-media { padding: 32px 0 0 24px; }
  .case-facts div { grid-template-columns: 1fr; gap: 2px; }
  .form { padding: 26px 20px; }
  .row2 { grid-template-columns: 1fr; gap: 0; }
  .send .btn { width: 100%; justify-content: center; }
  .disciplines { grid-template-columns: 1fr; }
  .model { padding: 32px 26px; }
}

/* ════════════════════ hire pages ════════════════════ */
/* nav dropdown */
.dd { position: relative; }
.dd-btn { display: inline-flex; align-items: center; gap: 6px; }
.dd-btn i { font-size: .7rem; transition: transform .25s var(--ease); }
.dd:hover .dd-btn i, .dd:focus-within .dd-btn i { transform: rotate(180deg); }
.dd-menu { position: absolute; top: calc(100% + 10px); left: 50%; width: 290px; padding: 8px; border-radius: 16px; background: rgba(13, 19, 38, .97); border: 1px solid var(--night-line); box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .7); backdrop-filter: blur(16px); display: grid; opacity: 0; visibility: hidden; transform: translate(-50%, 6px); transition: opacity .2s, transform .25s var(--ease), visibility .2s; }
.dd-menu::before { content: ""; position: absolute; inset: -12px 0 auto; height: 12px; }
.dd:hover .dd-menu, .dd:focus-within .dd-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav .dd-menu a { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 10px; color: var(--on-night); font-size: .93rem; }
.nav .dd-menu a i { font-size: 1.15rem; color: var(--sky); }
.nav .dd-menu a:hover { background: rgba(255, 255, 255, .06); }
.nav .dd-menu .dd-all { justify-content: space-between; margin-top: 4px; border-top: 1px solid var(--night-line); border-radius: 0 0 10px 10px; color: var(--sky); font-weight: 700; }
.drawer a.sub { padding-left: 16px; font-size: .96rem; color: var(--on-night-2); }

/* sub hero */
.hero-sub { padding: 140px 0 96px; }
.hero-sub-in { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr); gap: 64px; align-items: center; }
.hero-sub h1 { font-size: clamp(2.3rem, 1.4rem + 3.2vw, 4rem); }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .88rem; color: var(--on-night-2); margin-bottom: 26px; }
.crumbs a:hover { color: #fff; }
.crumbs i { font-size: .7rem; opacity: .6; }
.crumbs span { color: #fff; }
.quick { padding: 34px 32px; border-radius: 24px; background: linear-gradient(160deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .02)); border: 1px solid rgba(255, 255, 255, .14); box-shadow: 0 1px 0 rgba(255, 255, 255, .08) inset, var(--sh-float); backdrop-filter: blur(10px); }
.quick-from { font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--sky); }
.quick-price { display: flex; align-items: baseline; gap: 6px; margin-top: 8px; }
.quick-price strong { font-size: 3.4rem; line-height: 1; letter-spacing: -.04em; color: #fff; font-variant-numeric: tabular-nums; }
.quick-price span { color: var(--on-night-2); }
.quick-mo { color: var(--on-night-2); margin-top: 6px; font-size: .95rem; }
.quick ul { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--night-line); display: grid; gap: 12px; }
.quick li { display: flex; gap: 10px; align-items: center; font-size: .95rem; color: var(--on-night); }
.quick li i { color: #4ADE95; }

/* build grid */
.bld-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 24px; overflow: hidden; }
.bld { background: var(--surface); padding: 34px 30px 36px; display: flex; flex-direction: column; gap: 20px; transition: background-color .3s; }
.bld:hover { background: #FAFBFE; }
.bld > i { font-size: 1.6rem; color: var(--accent); width: 52px; height: 52px; display: inline-flex; align-items: center; justify-content: center; border-radius: 14px; background: var(--accent-soft); transition: transform .35s var(--ease); }
.bld:hover > i { transform: rotate(-6deg) scale(1.06); }
.bld p { color: var(--muted); margin-top: 8px; font-size: .96rem; }

/* stack */
.stack-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; align-items: start; }
.stk-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stk { padding: 26px 26px 28px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); }
.stk h3 { font-size: 1rem; }
.stk .tags li { font-size: .86rem; padding: 5px 12px; background: var(--bg); }

/* included */
.inc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px 28px; }
.inc > i { font-size: 1.7rem; color: var(--accent); margin-bottom: 16px; display: block; }
.inc h3 { font-size: 1.08rem; }
.inc p { color: var(--muted); margin-top: 8px; font-size: .95rem; }

/* tiers */
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; align-items: stretch; }
.tier { position: relative; display: flex; flex-direction: column; padding: 32px 26px 28px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s; }
.tier:hover { transform: translateY(-4px); box-shadow: var(--sh-card); }
.tier-rec { background: var(--night); color: var(--on-night); border-color: transparent; box-shadow: 0 30px 60px -30px rgba(20, 38, 96, .7); }
.tier-flag { position: absolute; top: -11px; left: 26px; font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--night); background: var(--sky); padding: 4px 9px; border-radius: 6px; }
.tier-yrs { font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.tier-rec .tier-yrs { color: var(--sky); }
.tier h3 { font-size: 1.22rem; margin-top: 10px; min-height: 2.5em; }
.tier-price { display: flex; align-items: baseline; gap: 6px; margin-top: 18px; }
.tier-price strong { font-size: 2.4rem; letter-spacing: -.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.tier-price span { color: var(--muted); font-size: .92rem; }
.tier-rec .tier-price span, .tier-rec .tier-alt { color: var(--on-night-2); }
.tier-alt { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 10px; font-size: .9rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.tier-alt span + span::before { content: "\00B7"; margin-right: 14px; }
.tier .checks { margin: 22px 0 26px; flex: 1; align-content: start; }
.tier-rec .checks { border-color: var(--night-line); }
.tier-rec .checks li { color: var(--on-night-2); }
.tier-rec .checks li::before { border-color: var(--sky); }
.tier-btn { justify-content: center; width: 100%; height: 48px; }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #1E2640; }
.custom { margin-top: 24px; padding: 34px 40px; border-radius: 22px; background: var(--night); color: var(--on-night); display: flex; align-items: center; justify-content: space-between; gap: 32px; position: relative; overflow: hidden; }
.custom::before { content: ""; position: absolute; inset: 0; background: radial-gradient(50% 120% at 90% 0%, rgba(45, 91, 255, .35), transparent 70%); pointer-events: none; }
.custom > * { position: relative; }
.custom h3 { font-size: 1.35rem; color: #fff; }
.custom p { color: var(--on-night-2); margin-top: 6px; max-width: 62ch; }
.compare { display: flex; gap: 14px; align-items: flex-start; margin-top: 28px; color: var(--muted); font-size: .95rem; max-width: 90ch; }
.compare i { font-size: 1.4rem; color: var(--accent); flex: none; }

.steps-4 { grid-template-columns: repeat(4, 1fr); }

/* proof */
.proof { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; align-items: center; }
.proof-media { border-radius: 24px; overflow: hidden; background: linear-gradient(135deg, #DCE5FF, #EEF2FF 60%, #E6F4FF); padding: 36px; }
.proof-media img { border-radius: 12px; box-shadow: 0 40px 70px -40px rgba(20, 38, 96, .55), 0 0 0 1px rgba(11, 16, 32, .06); }
.proof-phone .proof-media { display: flex; justify-content: center; }
.proof-phone .proof-media img { width: 44%; border-radius: 28px; box-shadow: none; filter: drop-shadow(0 30px 40px rgba(20, 38, 96, .3)); }
.proof-body .sub { margin-top: 18px; }

/* related */
.sec-slim { padding: 72px 0; }
.rel { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.rel-card { display: flex; align-items: center; gap: 12px; padding: 18px 20px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); font-weight: 700; transition: border-color .25s, transform .3s var(--ease), box-shadow .3s; }
.rel-card i:first-child { font-size: 1.35rem; color: var(--accent); }
.rel-card span { flex: 1; }
.rel-card i:last-child { color: var(--muted); transition: transform .3s var(--ease); }
.rel-card:hover { border-color: var(--accent); box-shadow: var(--sh-card); transform: translateY(-2px); }
.rel-card:hover i:last-child { transform: translateX(3px); color: var(--accent); }

/* hub */
.hub { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.hub-card { display: flex; flex-direction: column; padding: 32px 28px 28px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s, border-color .35s; }
.hub-card:hover { transform: translateY(-5px); box-shadow: var(--sh-card); border-color: transparent; }
.hub-ico { font-size: 1.8rem; color: var(--accent); width: 56px; height: 56px; display: inline-flex; align-items: center; justify-content: center; border-radius: 16px; background: var(--accent-soft); margin-bottom: 24px; }
.hub-card h3 { font-size: 1.25rem; }
.hub-card .tags { flex: 1; align-content: flex-start; }
.hub-price { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .94rem; }
.hub-price strong { color: var(--ink); }
.hub-go { margin-top: 14px; display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--accent); }
.hub-go i { transition: transform .3s var(--ease); }
.hub-card:hover .hub-go i { transform: translateX(3px); }

/* rates table */
.rate-wrap { overflow-x: auto; border-radius: 22px; border: 1px solid var(--line); background: var(--surface); }
.rates { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; min-width: 640px; }
.rates th { text-align: left; font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 18px 22px; background: #FAFBFD; border-bottom: 1px solid var(--line); }
.rates td { padding: 16px 22px; border-bottom: 1px solid var(--line); font-size: .96rem; }
.rates tr:last-child td { border-bottom: 0; }
.rates tbody tr { transition: background-color .2s; }
.rates tbody tr:hover { background: #FAFBFE; }
.rates td:first-child { font-weight: 700; }
.rates td:first-child a:hover { color: var(--accent); }
.rates td small { display: block; font-weight: 400; color: var(--muted); font-size: .84rem; }

/* footer 4 col */
.ft-in-4 { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
.ft-col { display: grid; gap: 10px; font-size: .94rem; align-content: start; }
.ft-col h4 { color: #fff; font-size: .95rem; margin-bottom: 4px; }
.ft-col a:hover { color: #fff; }

@media (max-width: 1080px) {
  .hero-sub-in, .stack-wrap, .proof { grid-template-columns: 1fr; gap: 48px; }
  .quick { max-width: 460px; }
  .bld-grid { grid-template-columns: 1fr 1fr; }
  .inc-grid, .tiers, .hub, .rel { grid-template-columns: 1fr 1fr; }
  .steps-4 { grid-template-columns: 1fr; }
  .ft-in-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .custom { flex-direction: column; align-items: flex-start; padding: 30px 26px; }
}
@media (max-width: 600px) {
  .hero-sub { padding: 116px 0 72px; }
  .bld-grid, .inc-grid, .tiers, .hub, .rel, .stk-grid { grid-template-columns: 1fr; }
  .tier h3 { min-height: 0; }
  .proof-media { padding: 20px; }
  .ft-in-4 { grid-template-columns: 1fr; }
}

.model-link { margin-top: 24px; display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--accent); }
.model-link i { transition: transform .3s var(--ease); }
.model-link:hover i { transform: translateX(3px); }