/* ============================================================
   UntangleTabs — Night Prism scroll-film
   Dark obsidian + smoked glass + cyan/cobalt edge light.
   ============================================================ */
:root {
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Night Prism (dark, default) */
  --bg: #0A0C10;
  --seam: #0B0E14;
  --ink: #EDF2F8;
  --ink-2: #8A93A3;
  --ink-3: #5A6474;
  --glass: rgba(15, 20, 30, 0.72);
  --glass-2: rgba(22, 28, 40, 0.55);
  --hair: rgba(255, 255, 255, 0.08);
  --hair-2: rgba(255, 255, 255, 0.14);
  --cyan: #37E6FF;
  --cyan-edge: rgba(55, 230, 255, 0.16);
  --cobalt: #5B8CFF;
  --primary: #EEF3F8;
  --primary-ink: #0A0C10;

  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 72px);
  --r: 16px;
  --r-lg: 22px;
  --pill: 999px;
}
:root[data-theme="light"] {
  /* Crystal Prism (light) */
  --bg: #EFF2F7;
  --seam: #E7EBF2;
  --ink: #0C1118;
  --ink-2: #576273;
  --ink-3: #8A93A3;
  --glass: rgba(255, 255, 255, 0.62);
  --glass-2: rgba(255, 255, 255, 0.45);
  --hair: rgba(12, 17, 24, 0.10);
  --hair-2: rgba(12, 17, 24, 0.16);
  --cyan: #0091B4;
  --cyan-edge: rgba(0, 150, 190, 0.18);
  --cobalt: #2E5BD6;
  --primary: #0C1118;
  --primary-ink: #F4F7FB;
}

* , *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
::selection { background: var(--cyan); color: #04121a; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

.skip { position: fixed; left: 14px; top: -60px; z-index: 300; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 8px; font-family: var(--mono); font-size: 0.9rem; transition: top .18s; }
.skip:focus { top: 14px; }

/* --- Nav (floating pill) --- */
.nav {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  z-index: 200; width: min(var(--maxw), calc(100% - 32px));
  display: flex; align-items: center; gap: 18px;
  padding: 10px 12px 10px 20px;
  background: var(--glass); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid var(--hair); border-radius: var(--pill);
  box-shadow: 0 10px 40px -20px rgba(0,0,0,.7);
  transition: background .3s, border-color .3s, color .3s;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.brand__word { font-size: 1.12rem; letter-spacing: -0.03em; }
.brand__word b { font-weight: 500; color: var(--ink-2); }
.nav__links { display: flex; gap: 24px; margin-left: 10px; }
.nav__links a { font-size: 0.95rem; color: var(--ink-2); letter-spacing: -0.01em; transition: color .2s; }
.nav__links a:hover { color: var(--ink); }
.nav__right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.theme-toggle { display: inline-flex; align-items: center; gap: 8px; background: transparent; border: 1px solid var(--hair); border-radius: var(--pill); height: 38px; padding: 0 14px; font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); cursor: pointer; }
.theme-toggle:hover { color: var(--ink); border-color: var(--hair-2); }
.theme-toggle__dot { width: 12px; height: 12px; border-radius: 50%; background: radial-gradient(circle at 32% 30%, var(--cyan), var(--cobalt)); box-shadow: 0 0 10px var(--cyan-edge); }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; height: 50px; padding: 0 22px; border-radius: var(--pill); font-weight: 600; font-size: 1rem; letter-spacing: -0.01em; border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .2s, background .2s, border-color .2s, opacity .2s; white-space: nowrap; }
.btn--lg { height: 56px; padding: 0 28px; }
.btn--block { display: flex; width: 100%; }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--primary); color: var(--primary-ink); box-shadow: 0 8px 30px -12px rgba(255,255,255,.25); }
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 14px 40px -14px rgba(120,210,255,.4); }
.btn--ghostglass { background: var(--glass-2); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); color: var(--ink); border-color: var(--hair-2); }
.btn--ghostglass:hover { border-color: var(--cyan); color: var(--ink); }
.btn--text { height: auto; padding: 6px 2px; background: none; color: var(--ink-2); font-family: var(--mono); font-size: 0.9rem; letter-spacing: 0; }
.btn--text:hover { color: var(--cyan); }

/* --- Type primitives --- */
.eyebrow { font-size: 0.98rem; color: var(--ink-2); letter-spacing: -0.01em; display: inline-flex; align-items: center; gap: 10px; }
.eyebrow__soft { color: var(--ink-3); }
.eyebrow__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); flex: none; }
.kicker { font-family: var(--mono); font-size: 0.82rem; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-2); display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.kicker__idx { color: var(--cyan); }
.kicker__meta { color: var(--ink-3); border: 1px solid var(--hair); border-radius: var(--pill); padding: 3px 9px; letter-spacing: .1em; }
.kicker__meta--plan { color: var(--cobalt); border-color: color-mix(in srgb, var(--cobalt) 40%, transparent); }

/* ============================================================
   FILM HERO
   ============================================================ */
.film { position: relative; height: 320vh; z-index: 1; }
.film__stage { position: sticky; top: 0; height: 100vh; overflow: hidden; background: #05070b; z-index: 1; }
.film__canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; transition: opacity .6s ease; }
.film__canvas.on { opacity: 1; }
.film__poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.film__grain { position: absolute; inset: 0; pointer-events: none; opacity: .06; mix-blend-mode: overlay; 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='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.film__vignette { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(120% 90% at 50% 42%, transparent 45%, rgba(0,0,0,.55) 100%); }

.hero { position: absolute; inset: 0; z-index: 3; display: flex; flex-direction: column; justify-content: center; pointer-events: none; will-change: opacity, transform; }
.hero__inner { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); pointer-events: auto; position: relative; z-index: 1; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; background: linear-gradient(102deg, rgba(5,7,11,.86) 0%, rgba(5,7,11,.55) 30%, rgba(5,7,11,.12) 52%, transparent 66%), linear-gradient(0deg, rgba(5,7,11,.6), transparent 40%); }
.hero .eyebrow { color: #C6D0DC; }
.hero .eyebrow__soft { color: #7C8697; }
.hero__h { font-weight: 700; letter-spacing: -0.035em; line-height: 0.94; font-size: clamp(3.2rem, 8.4vw, 7.2rem); color: #fff; margin: 22px 0 0; max-width: 15ch; text-shadow: 0 2px 40px rgba(0,0,0,.5); }
.hero__sub { margin-top: 26px; max-width: 46ch; font-size: clamp(1.05rem, 1.5vw, 1.28rem); line-height: 1.5; color: #B7C1CE; }
.hero__cta { margin-top: 34px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.hero__trust { margin-top: 26px; font-size: 0.92rem; color: #7C8697; max-width: 52ch; }
.film__scrollcue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; flex-direction: column; align-items: center; gap: 8px; font-family: var(--mono); font-size: 0.72rem; letter-spacing: .2em; text-transform: uppercase; color: #7C8697; }
.film__scrollcue i { width: 1px; height: 34px; background: linear-gradient(#7C8697, transparent); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0%,100%{transform:scaleY(.4);opacity:.4;transform-origin:top} 50%{transform:scaleY(1);opacity:1;transform-origin:top} }
.film__beat { position: absolute; bottom: 30px; right: var(--gutter); z-index: 3; font-family: var(--mono); font-size: 0.8rem; letter-spacing: .12em; text-transform: uppercase; color: #9FB4C4; }
.film__beat span { border-left: 2px solid var(--cyan); padding-left: 10px; }

/* ============================================================
   CONTENT
   ============================================================ */
.content { position: relative; z-index: 2; background: var(--seam); transition: background .4s; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.sec { padding: clamp(90px, 13vw, 190px) 0; position: relative; }
.sec__h { font-weight: 700; letter-spacing: -0.03em; line-height: 1.0; font-size: clamp(2.1rem, 4.6vw, 3.8rem); max-width: 20ch; }
.sec__lede { margin-top: 24px; max-width: 56ch; font-size: clamp(1.05rem, 1.4vw, 1.25rem); line-height: 1.55; color: var(--ink-2); }

/* glass primitive */
.glass { background: var(--glass); backdrop-filter: blur(16px) saturate(1.2); -webkit-backdrop-filter: blur(16px) saturate(1.2); border: 1px solid var(--hair); border-radius: var(--r-lg); box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 30px 60px -40px rgba(0,0,0,.7); position: relative; }
.glass::after { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; background: linear-gradient(160deg, var(--cyan-edge), transparent 40%); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; opacity: .8; }

/* cards */
.cards { margin-top: clamp(40px, 5vw, 64px); display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.card { padding: clamp(22px, 2.2vw, 30px); display: flex; flex-direction: column; gap: 12px; }
.card__tag { align-self: flex-start; font-family: var(--mono); font-size: 0.72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); border: 1px solid var(--cyan-edge); border-radius: var(--pill); padding: 3px 9px; }
.card__tag--plan { color: var(--cobalt); border-color: color-mix(in srgb, var(--cobalt) 45%, transparent); }
.card__h { font-size: 1.28rem; font-weight: 600; letter-spacing: -0.02em; }
.card p { color: var(--ink-2); font-size: 0.97rem; line-height: 1.5; }
.card--accent { border-color: color-mix(in srgb, var(--cyan) 30%, var(--hair)); }
.card--accent::after { opacity: 1; background: linear-gradient(160deg, var(--cyan-edge), transparent 55%); }

/* context split + dashboard */
.wrap--split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 84px); align-items: center; }
.ticks { margin-top: 30px; list-style: none; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.ticks li { position: relative; padding-left: 22px; color: var(--ink-2); line-height: 1.5; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 2px; background: var(--cyan); box-shadow: 0 0 10px var(--cyan-edge); }
.ticks b { color: var(--ink); font-weight: 600; }

.dash { padding: 18px; }
.dash__bar { display: flex; align-items: center; gap: 8px; padding: 4px 6px 14px; }
.dash__bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--hair-2); }
.dash__search { margin-left: 10px; flex: 1; height: 30px; border-radius: 8px; background: var(--glass-2); border: 1px solid var(--hair); display: flex; align-items: center; padding: 0 12px; font-family: var(--mono); font-size: 0.78rem; color: var(--ink-3); }
.dash__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; position: relative; }
.dpanel { background: var(--glass-2); border: 1px solid var(--hair); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; gap: 8px; min-height: 120px; }
.dpanel__t { font-size: 0.9rem; font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.dpanel i { height: 8px; border-radius: 4px; background: var(--hair); }
.dpanel i:nth-child(3) { width: 80%; } .dpanel i:nth-child(4) { width: 55%; } .dpanel i:nth-child(5) { width: 70%; }
.dpanel--work i:nth-child(2) { background: color-mix(in srgb, var(--cyan) 40%, var(--hair)); }
.dash__core { position: absolute; left: 50%; top: 52%; transform: translate(-50%,-50%); width: 130px; height: 130px; filter: drop-shadow(0 0 20px var(--cyan-edge)); }
.dash__core svg { width: 100%; height: 100%; animation: spin 22s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* loop */
.sec--loop { padding: clamp(70px,9vw,120px) 0; text-align: center; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); }
.loop__line { font-family: var(--mono); font-size: clamp(0.9rem, 1.6vw, 1.15rem); letter-spacing: .02em; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 10px 14px; }
.loop__line span { color: var(--ink); }
.loop__line em { color: var(--cyan); font-style: normal; }
.loop__note { margin-top: 22px; color: var(--ink-2); font-size: 1.02rem; }

/* pricing */
.tiers { margin-top: clamp(40px,5vw,60px); display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; align-items: start; }
.tier { padding: clamp(24px,2.6vw,34px); }
.tier--feat { border-color: color-mix(in srgb, var(--cyan) 34%, var(--hair)); transform: translateY(-10px); }
.tier--feat::after { opacity: 1; }
.tier__flag { display: inline-block; font-family: var(--mono); font-size: 0.72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--primary-ink); background: var(--cyan); padding: 4px 10px; border-radius: var(--pill); margin-bottom: 14px; }
.tier__name { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; display: flex; align-items: center; gap: 9px; }
.tier__price { font-family: var(--mono); margin: 6px 0 4px; display: flex; align-items: baseline; gap: 3px; }
.tier__price b { font-size: 1.9rem; font-weight: 500; }
.tier__price span { color: var(--ink-2); font-size: 0.9rem; }
.tier__for { color: var(--ink-2); font-size: 0.95rem; min-height: 3em; margin-bottom: 20px; }
.tier ul { list-style: none; padding: 0; margin: 0 0 26px; display: flex; flex-direction: column; gap: 11px; }
.tier li { position: relative; padding-left: 24px; font-size: 0.97rem; color: var(--ink); }
.tier li::before { content: ""; position: absolute; left: 0; top: 7px; width: 11px; height: 7px; border-left: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); transform: rotate(-45deg); }
.plan-pill { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--cobalt); border: 1px solid color-mix(in srgb, var(--cobalt) 40%, transparent); border-radius: var(--pill); padding: 2px 8px; }
.pricing__foot { margin-top: 28px; color: var(--ink-2); font-size: 0.95rem; max-width: 80ch; line-height: 1.6; }

/* final */
.sec--final { text-align: center; }
.final { display: flex; flex-direction: column; align-items: center; }
.final__h { font-weight: 700; letter-spacing: -0.035em; line-height: 0.95; font-size: clamp(2.6rem, 7vw, 5.4rem); }
.final__sub { margin-top: 22px; color: var(--ink-2); font-size: 1.15rem; }
.signup { margin-top: 38px; display: flex; gap: 10px; width: min(520px, 100%); }
.signup__in { flex: 1; height: 56px; border-radius: var(--pill); border: 1px solid var(--hair-2); background: var(--glass); backdrop-filter: blur(10px); padding: 0 20px; font-size: 1.02rem; color: var(--ink); }
.signup__in::placeholder { color: var(--ink-3); }
.signup__micro { margin-top: 16px; font-family: var(--mono); font-size: 0.82rem; color: var(--ink-2); }
.signup__micro.ok { color: var(--cyan); }

/* footer */
.footer { background: var(--bg); border-top: 1px solid var(--hair); padding: 40px 0; }
.footer__in { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.brand--sm { font-size: 1rem; }
.footer__line { color: var(--ink-2); }
.footer__proto { margin-left: auto; font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--cobalt); }

/* reveals */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* responsive */
@media (max-width: 960px) {
  .nav__links { display: none; }
  .cards, .cards--3, .tiers { grid-template-columns: 1fr; }
  .wrap--split { grid-template-columns: 1fr; }
  .film { height: 300vh; }
  .hero__h { font-size: clamp(2.8rem, 12vw, 4.6rem); }
}
@media (max-width: 560px) {
  :root { --gutter: 20px; }
  .nav { padding: 8px 10px 8px 16px; }
  .nav__right .btn--ghostglass { display: none; }
  .signup { flex-direction: column; }
  .footer__proto { margin-left: 0; }
  .film__beat { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .film__canvas { transition: none; }
  .dash__core svg, .film__scrollcue i { animation: none; }
}