/* CodeSequence — web
   Same palette as the app: near-black surfaces, one blue accent,
   violet in gradients and the orange dot from the icon. */

:root {
  --bg: #0b0d13;
  --bg-2: #0f1320;
  --card: #151922;
  --card-2: #1c212c;
  --border: #262c38;
  --text: #f2f2ef;
  --text-2: #a7adbd;
  --muted: #737a8c;
  --accent: #78a9ff;
  --accent-strong: #4f86f0;
  --violet: #aa8cff;
  --orange: #f7a034;
  --green: #4ade80;
  --radius: 18px;
  --maxw: 1160px;
  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --body: "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
::selection { background: rgba(120, 169, 255, .35); }

/* ---------- language switch (no-JS default: Spanish) ---------- */
html:not([data-lang="en"]) .l-en { display: none !important; }
html[data-lang="en"] .l-es { display: none !important; }

/* ---------- atmosphere ---------- */
.atmos {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 600px at 92% -10%, rgba(40, 80, 190, .35), transparent 60%),
    radial-gradient(700px 520px at -10% 45%, rgba(90, 55, 190, .22), transparent 60%),
    radial-gradient(520px 380px at 8% -8%, rgba(247, 160, 52, .10), transparent 60%),
    linear-gradient(180deg, #0a0c12 0%, #0c1020 55%, #0e1630 100%);
}
.atmos::after {
  /* faint data-structure line art, like the icon */
  content: ""; position: absolute; inset: 0; opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='520' height='520' fill='none' stroke='%239fb4e6' stroke-opacity='.10' stroke-width='2'%3E%3Ccircle cx='60' cy='70' r='16'/%3E%3Ccircle cx='120' cy='70' r='16'/%3E%3Ccircle cx='180' cy='70' r='16'/%3E%3Cpath d='M76 70h28M136 70h28'/%3E%3Ccircle cx='400' cy='60' r='16'/%3E%3Ccircle cx='360' cy='130' r='16'/%3E%3Ccircle cx='440' cy='130' r='16'/%3E%3Cpath d='M391 74l-22 42M409 74l22 42'/%3E%3Ccircle cx='110' cy='380' r='13'/%3E%3Ccircle cx='70' cy='450' r='13'/%3E%3Ccircle cx='150' cy='450' r='13'/%3E%3Cpath d='M104 392L77 438M116 392l27 46M83 450h54'/%3E%3Crect x='330' y='360' width='120' height='90' rx='6'/%3E%3Cpath d='M370 360v90M410 360v90M330 390h120M330 420h120'/%3E%3C/svg%3E");
  background-size: 520px 520px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
}

/* ---------- layout ---------- */
.wrap { width: min(100% - 32px, var(--maxw)); margin-inline: auto; }
section { padding: 96px 0; }
.eyebrow {
  font-family: var(--mono); font-size: 13px; letter-spacing: .02em;
  color: var(--accent); margin: 0 0 14px;
}
.eyebrow::before { content: "// "; color: var(--muted); }
h1, h2, h3 { font-family: var(--display); line-height: 1.02; margin: 0; letter-spacing: -.02em; }
h2 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; }
h3 { font-size: 21px; font-weight: 700; letter-spacing: -.01em; }
.lede { color: var(--text-2); font-size: clamp(17px, 2vw, 20px); max-width: 60ch; }
.grad {
  background: linear-gradient(90deg, var(--accent) 0%, var(--violet) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.dot { color: var(--orange); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: rgba(11, 13, 19, .72);
  border-bottom: 1px solid rgba(38, 44, 56, .7);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 15px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); text-decoration: none; }
.lang {
  display: inline-flex; border: 1px solid var(--border); border-radius: 999px; padding: 3px;
  background: var(--card);
}
.lang button {
  appearance: none; border: 0; background: transparent; color: var(--muted);
  font: 600 12px/1 var(--mono); padding: 7px 10px; border-radius: 999px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--accent); color: #0b0d13; }
@media (max-width: 720px) {
  .nav-links .hide-sm { display: none; }
  .nav-links { gap: 14px; }
}
@media (max-width: 380px) {
  .nav .wrap { height: auto; min-height: 64px; flex-wrap: wrap; gap: 10px; padding-block: 12px; }
  .brand { width: 100%; justify-content: center; }
  .nav-links { margin-inline: auto; }
}

/* ---------- buttons ---------- */
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px; font-weight: 600; font-size: 16px;
  border: 1px solid var(--border); color: var(--text); background: var(--card);
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: #3a4252; }
.btn.primary { background: var(--text); color: #0b0d13; border-color: transparent; }
.btn.primary:hover { background: #fff; }
.btn svg { width: 20px; height: 20px; }
.btn small { display: block; font-size: 11px; font-weight: 500; opacity: .7; line-height: 1.1; }
.btn .stack { line-height: 1.15; text-align: left; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(52px, 8.4vw, 104px); font-weight: 800; }
.hero .lede { margin-top: 24px; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 28px;
  font-family: var(--mono); font-size: 13px; color: var(--muted);
}
.hero-meta span::before { content: "✓ "; color: var(--green); }
.hero-visual { position: relative; display: flex; justify-content: center; }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { margin-top: 12px; }
}

/* ---------- phone ---------- */
.phone {
  position: relative; width: min(320px, 78vw); aspect-ratio: 603 / 1311;
  border-radius: 48px; padding: 10px; background: #050608;
  box-shadow: 0 0 0 1.5px #3a4050, 0 40px 80px -30px rgba(0, 0, 0, .8), 0 0 90px -20px rgba(120, 169, 255, .35);
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 38px; }
.float-card {
  position: absolute; background: var(--card); border: 1px solid rgba(120, 169, 255, .55);
  border-radius: 16px; padding: 14px 16px; box-shadow: 0 24px 50px -18px rgba(0, 0, 0, .8), 0 0 40px -10px rgba(120, 169, 255, .45);
  font-size: 14px; line-height: 1.35; min-width: 210px;
  animation: floaty 6s ease-in-out infinite;
}
.float-card b { display: block; font-size: 15px; }
.float-card span { color: var(--text-2); font-size: 13px; }
.float-card.a { left: -36px; top: 38%; }
.float-card.b { right: -30px; bottom: 16%; animation-delay: -3s; }
.float-card .row { display: flex; gap: 10px; align-items: center; }
.float-card .ico {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: rgba(120, 169, 255, .14); color: var(--accent); font-family: var(--mono); font-weight: 700;
}
@keyframes floaty { 50% { transform: translateY(-8px); } }
@media (max-width: 520px) {
  .float-card.a { left: -8px; } .float-card.b { right: -8px; }
  .float-card { min-width: 0; }
}

/* ---------- live two-pointer demo ---------- */
.demo {
  margin-top: 56px; background: linear-gradient(180deg, var(--card), #12161e);
  border: 1px solid var(--border); border-radius: 24px; padding: 28px;
}
.demo-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; align-items: baseline; }
.demo-head h3 { font-size: 24px; }
.demo-head p { margin: 4px 0 0; color: var(--text-2); font-size: 15px; }
.cells { display: grid; grid-template-columns: repeat(8, 1fr); gap: 10px; margin-top: 26px; }
.cell {
  position: relative; background: var(--card-2); border: 1px solid var(--border); border-radius: 14px;
  aspect-ratio: 1 / .82; display: grid; place-items: center;
  font: 700 clamp(18px, 3vw, 28px)/1 var(--mono); color: var(--text);
  transition: background .35s ease, color .35s ease, transform .35s ease, border-color .35s ease;
}
.cell small { position: absolute; bottom: -22px; font: 500 11px/1 var(--mono); color: var(--muted); }
.cell .ptr { position: absolute; top: -24px; font: 700 12px/1 var(--mono); color: var(--accent); opacity: 0; transition: opacity .3s; }
.cell.l, .cell.r { background: var(--accent); color: #0b0d13; border-color: transparent; transform: translateY(-3px); }
.cell.l .ptr, .cell.r .ptr { opacity: 1; }
.cell.done { background: var(--green); color: #07130b; }
.cell.out { opacity: .35; }
.demo-foot { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 40px; }
.log {
  flex: 1 1 320px; font: 14px/1.5 var(--mono); color: var(--text-2);
  background: #0c0f16; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; min-height: 48px;
}
.log b { color: var(--text); font-weight: 600; }
.ctrl { display: flex; gap: 8px; }
.ctrl button {
  appearance: none; border: 1px solid var(--border); background: var(--card-2); color: var(--text);
  width: 46px; height: 46px; border-radius: 50%; cursor: pointer; display: grid; place-items: center;
}
.ctrl button.play { background: var(--accent); border-color: transparent; color: #0b0d13; }
.ctrl button:focus-visible, .lang button:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.ctrl svg { width: 18px; height: 18px; }
@media (max-width: 560px) {
  .cells { grid-template-columns: repeat(4, 1fr); row-gap: 58px; }
  .demo { padding: 20px; }
}

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; counter-reset: s; }
.step {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; position: relative; overflow: hidden;
}
.step::before {
  counter-increment: s; content: "0" counter(s);
  font: 700 13px/1 var(--mono); color: var(--accent);
  display: inline-block; padding: 6px 8px; border-radius: 8px; background: rgba(120, 169, 255, .12);
}
.step h3 { margin: 18px 0 8px; }
.step p { margin: 0; color: var(--text-2); font-size: 15px; }
.step::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, rgba(120, 169, 255, .16), transparent 70%);
}
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* ---------- screens ---------- */
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 56px; align-items: start; }
.screen { display: flex; flex-direction: column; align-items: center; text-align: center; }
.screen .phone { width: min(280px, 72vw); }
.screen:nth-child(2) { transform: translateY(40px); }
.screen h3 { margin-top: 28px; }
.screen p { color: var(--text-2); font-size: 15px; margin: 8px 0 0; max-width: 32ch; }
@media (max-width: 900px) {
  .screens { grid-template-columns: 1fr; gap: 64px; }
  .screen:nth-child(2) { transform: none; }
}

/* ---------- features ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.feature .k { font: 800 40px/1 var(--display); letter-spacing: -.02em; }
.feature h3 { margin: 14px 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--text-2); font-size: 15px; }
.feature.wide { grid-column: span 2; display: flex; gap: 24px; align-items: center; }
.feature code { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.langs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.langs span { font: 600 12px/1 var(--mono); padding: 7px 10px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--border); }
@media (max-width: 900px) { .features { grid-template-columns: 1fr 1fr; } .feature.wide { grid-column: span 2; } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } .feature.wide { grid-column: auto; flex-direction: column; align-items: flex-start; } }

/* ---------- promise ---------- */
.promise {
  text-align: center; padding: 72px 24px; border-radius: 28px; border: 1px solid var(--border);
  background:
    radial-gradient(600px 240px at 50% 0%, rgba(120, 169, 255, .18), transparent 70%),
    var(--card);
}
.promise h2 { font-size: clamp(30px, 4.4vw, 48px); }
.promise p { color: var(--text-2); max-width: 56ch; margin: 18px auto 0; }

/* ---------- document pages (privacy / support) ---------- */
.doc { padding: 64px 0 96px; }
.doc .wrap { max-width: 780px; }
.doc h1 { font-size: clamp(40px, 6vw, 64px); font-weight: 800; }
.doc .updated { font-family: var(--mono); font-size: 13px; color: var(--muted); margin-top: 14px; }
.doc h2 { font-size: 26px; margin: 48px 0 12px; }
.doc p, .doc li { color: var(--text-2); }
.doc strong { color: var(--text); }
.doc ul { padding-left: 20px; }
.doc code { font-family: var(--mono); font-size: 14px; color: var(--accent); background: var(--card-2); padding: 2px 6px; border-radius: 6px; }
.summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 36px; }
.summary div { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; font-size: 15px; }
.summary b { display: block; font-family: var(--display); font-size: 20px; }
@media (max-width: 640px) { .summary { grid-template-columns: 1fr; } }

.contact-card {
  margin-top: 36px; padding: 28px; border-radius: 22px; border: 1px solid rgba(120, 169, 255, .45);
  background: radial-gradient(500px 200px at 0% 0%, rgba(120, 169, 255, .16), transparent 70%), var(--card);
}
.contact-card .mail { font: 700 clamp(20px, 3.6vw, 28px)/1.2 var(--display); color: var(--text); word-break: break-all; }
.contact-card p { margin: 8px 0 0; }
.faq details {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 20px; margin-top: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--accent); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 12px 0 0; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--border); padding: 40px 0 56px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer a { color: var(--text-2); }

/* ---------- reveal on load ---------- */
@media (prefers-reduced-motion: no-preference) {
  .rise { opacity: 0; transform: translateY(16px); animation: rise .8s cubic-bezier(.2, .7, .2, 1) forwards; }
  .rise.d1 { animation-delay: .08s; } .rise.d2 { animation-delay: .16s; } .rise.d3 { animation-delay: .24s; } .rise.d4 { animation-delay: .32s; }
  @keyframes rise { to { opacity: 1; transform: none; } }
}
@media (prefers-reduced-motion: reduce) {
  .float-card { animation: none; }
  html { scroll-behavior: auto; }
}