/* DreamHouse3d — dark graphite + phthalo green, point-cloud motif */

:root {
  --base: #171b19;          /* page background — dark grey, green cast */
  --base-deep: #101412;     /* darker pools (nav scrim, footer, favicon bg) */
  --base-alt: #131816;      /* alternating sections */
  --card: #1d2320;
  --line: #2a322d;
  --white: #f2f5f3;
  --grey: #a9b3ad;          /* body text */
  --grey-faint: #6d7772;
  --phthalo: #123524;       /* the pigment itself — washes and glows */
  --phthalo-deep: #0b2517;
  --green: #1fca8d;         /* luminous phthalo derivative — the accent */
  --green-deep: #17a271;
  --green-wash: rgba(31, 202, 141, .12);
  --red: #ff8a73;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.25), 0 14px 44px -18px rgba(0,0,0,.55);
  --nav-h: 68px;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-body);
  background: var(--base);
  color: var(--white);
  line-height: 1.6;
  font-size: 16.5px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
::selection { background: var(--green); color: var(--base-deep); }

.shell { max-width: 1100px; margin: 0 auto; padding: 0 28px; }
.shell-narrow { max-width: 780px; }

h1, h2, h3 {
  font-family: var(--font-display); font-weight: 600;
  line-height: 1.1; letter-spacing: -0.02em; color: var(--white);
  text-wrap: balance;
}
h1 { font-size: clamp(2.35rem, 5.4vw, 4.1rem); }
h1 em, h2 em { font-style: normal; color: var(--green); }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.7rem); margin-bottom: 1.2rem; }
h3 { font-size: 1.2rem; margin-bottom: .5rem; }
p { color: var(--grey); text-wrap: pretty; }
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }
strong { color: var(--white); font-weight: 600; }

.eyebrow {
  font-size: .78rem; font-weight: 600; letter-spacing: .16em;
  text-transform: uppercase; color: var(--green); margin-bottom: 1rem;
}

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--green); color: var(--base-deep);
  padding: 10px 18px; border-radius: 0 0 10px 10px; font-weight: 600;
  transition: top .2s;
}
.skip:focus { top: 0; text-decoration: none; }

/* ---------- logo ---------- */
.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600; font-size: 1.32rem;
  color: var(--white); letter-spacing: -0.015em; white-space: nowrap;
}
.wordmark:hover { text-decoration: none; }
.wordmark .mark { color: var(--green); flex-shrink: 0; }
.wordmark .td { color: var(--green); }
.wordmark-sm { font-size: 1.12rem; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--base-deep) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-row { display: flex; align-items: center; gap: 28px; height: var(--nav-h); }
.nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.nav-links a { color: var(--grey); font-size: .92rem; font-weight: 500; }
.nav-links a:hover { color: var(--white); text-decoration: none; }
.nav-cta { white-space: nowrap; }
.nav-links .nav-menu-cta { display: none; }
.nav-burger {
  display: none; background: none; border: 0; cursor: pointer;
  padding: 10px 8px; margin-right: -8px;
}
.nav-burger span {
  display: block; width: 22px; height: 2px; background: var(--white);
  margin: 5px 0; border-radius: 2px; transition: transform .25s, opacity .2s;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px; border-radius: 999px; text-align: center;
  font-weight: 600; font-size: .95rem; border: 1px solid transparent;
  cursor: pointer; line-height: 1.2; min-height: 46px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s, border-color .15s, color .15s;
  font-family: var(--font-body);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-solid { background: var(--green); color: var(--base-deep); }
.btn-solid:hover { background: #2bdb9d; box-shadow: 0 10px 30px -10px rgba(31,202,141,.45); }
.btn-ghost { background: transparent; color: var(--white); border-color: var(--grey-faint); }
.btn-ghost:hover { border-color: var(--green); color: var(--green); }
.btn-wide { width: 100%; }
.btn:disabled { opacity: .55; cursor: default; transform: none; }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden; border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1000px 520px at 78% 30%, rgba(18,53,36,.55), transparent 65%),
    radial-gradient(700px 420px at 12% 85%, rgba(18,53,36,.35), transparent 70%),
    var(--base);
}
.hero-dots {
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(circle, rgba(31,202,141,.2) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(closest-side at 70% 45%, #000 15%, transparent 90%);
          mask-image: radial-gradient(closest-side at 70% 45%, #000 15%, transparent 90%);
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 32px; align-items: center;
  padding-top: clamp(56px, 9vh, 112px); padding-bottom: clamp(56px, 9vh, 112px);
}
.hero-visual { position: relative; min-height: 440px; }
#dotHouse {
  position: absolute; inset: 0; width: 100%; height: 100%;
  /* vertical scrolling always belongs to the page; sideways drags spin */
  touch-action: pan-y;
  cursor: grab; -webkit-user-select: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#dotHouse.grabbing { cursor: grabbing; }
.lede {
  font-size: clamp(1.02rem, 2vw, 1.2rem); max-width: 560px;
  margin: 1.5rem 0 2.1rem;
}
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 1.5rem; font-size: .85rem; color: var(--grey-faint); }

/* ---------- sections ---------- */
.section { padding: clamp(64px, 9vw, 118px) 0; }
.section-alt { background: var(--base-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cols { columns: 2; column-gap: 44px; margin: 1.4rem 0 2.6rem; }
.cols p { break-inside: avoid; margin-bottom: 1rem; }
.cols-one { max-width: 640px; margin: 1.2rem 0 2.2rem; }

.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px; box-shadow: var(--shadow);
}
.card h3 { font-size: 1.12rem; }
.card p { font-size: .95rem; }

/* ---------- steps ---------- */
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 2.2rem 0 2.4rem; }
.steps li {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow); position: relative;
}
.step-no {
  display: inline-flex; width: 40px; height: 40px; border-radius: 999px;
  background: var(--green-wash); color: var(--green);
  font-family: var(--font-display); font-weight: 600; font-size: 1.15rem;
  align-items: center; justify-content: center; margin-bottom: 16px;
}
.steps p { font-size: .95rem; }

.deliverables {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px 32px;
}
.ticks { list-style: none; columns: 2; column-gap: 40px; margin-top: 10px; }
.ticks-one { columns: 1; }
.ticks li {
  padding: 7px 0 7px 30px; position: relative; color: var(--grey);
  break-inside: avoid; font-size: .97rem;
}
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 12px; width: 16px; height: 16px;
  background: var(--green-wash); border-radius: 999px;
}
.ticks li::after {
  content: ""; position: absolute; left: 4.5px; top: 15.5px; width: 7px; height: 4.5px;
  border-left: 2px solid var(--green); border-bottom: 2px solid var(--green);
  transform: rotate(-45deg);
}

/* ---------- demo band (home page) ---------- */
.demo-band {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
  gap: 40px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: clamp(28px, 4vw, 44px);
  background-image: radial-gradient(600px 260px at 88% 10%, rgba(31,202,141,.09), transparent 70%);
}
.demo-band h2 { margin-bottom: .9rem; }
.demo-band-copy p { max-width: 46ch; }
.demo-band-actions { display: flex; flex-direction: column; gap: 12px; }
.demo-band-note { font-size: .85rem; color: var(--grey-faint); margin-top: 2px; }

/* ---------- demo page ---------- */
.demo-hero {
  position: relative; overflow: hidden; border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 460px at 50% 0%, rgba(18,53,36,.6), transparent 70%),
    var(--base);
}
.demo-hero .hero-dots {
  -webkit-mask-image: radial-gradient(closest-side at 50% 20%, #000 10%, transparent 85%);
          mask-image: radial-gradient(closest-side at 50% 20%, #000 10%, transparent 85%);
}
.demo-hero-inner {
  position: relative; z-index: 1;
  padding-top: clamp(48px, 7vw, 84px); padding-bottom: clamp(48px, 7vw, 84px);
}
.demo-hero .lede { margin-bottom: 2rem; }

.code-panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px 26px 22px;
}
.code-panel > label {
  display: block; font-family: var(--font-display); font-weight: 600;
  font-size: 1.05rem; margin-bottom: 12px; color: var(--white);
}
.code-help { font-size: .87rem; color: var(--grey-faint); margin-top: 2px; }
.code-row { display: flex; gap: 10px; }
.code-row input {
  flex: 1; min-width: 0; letter-spacing: .09em; font-size: 1.05rem;
  text-transform: uppercase; font-weight: 600; padding: 14px 16px;
}
.code-row .btn { white-space: nowrap; flex-shrink: 0; }

/* explanatory note blocks */
.notes { list-style: none; display: grid; gap: 4px; margin-top: 1.6rem; }
.notes li { padding: 20px 0 20px 22px; border-left: 2px solid var(--line); position: relative; }
.notes li::before {
  content: ""; position: absolute; left: -5px; top: 27px;
  width: 8px; height: 8px; border-radius: 999px; background: var(--green);
}
.notes h3 { font-size: 1.08rem; }
.notes p { font-size: .96rem; }

.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.how-grid .ticks li { font-size: .94rem; }
.try {
  margin-top: 20px; padding: 26px 28px;
  border: 1px dashed var(--line); border-radius: var(--radius);
  background: rgba(31, 202, 141, .04);
}
.try h3 { font-size: 1.05rem; }

/* ---------- forms ---------- */
.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px 30px 26px;
}
.panel h3 { margin-bottom: 14px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: .82rem; font-weight: 600; margin-bottom: 6px; color: var(--white); }
.field input, .field textarea, .code-row input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--base-deep); font: inherit; font-size: 1rem; color: var(--white);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .code-row input:focus {
  outline: none; border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-wash);
}
.field input.invalid, .field textarea.invalid { border-color: var(--red); }
.field textarea { resize: vertical; min-height: 120px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hp { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }

.form-msg { font-size: .9rem; margin-top: 12px; min-height: 1.3em; color: var(--grey); }
.form-msg.ok { color: var(--green); }
.form-msg.err { color: var(--red); }

/* ---------- faq ---------- */
.faq details { border-bottom: 1px solid var(--line); padding: 2px 0; }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between;
  align-items: center; gap: 16px; padding: 18px 0;
  font-weight: 600; font-size: 1.02rem; color: var(--white);
}
.faq summary:hover { color: var(--green); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--font-display); font-size: 1.5rem;
  color: var(--green); transition: transform .2s; flex-shrink: 0; line-height: 1;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 0 20px; max-width: 640px; }

/* ---------- contact ---------- */
.contact-alt { margin-top: 1.6rem; font-size: .95rem; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 44px 0 52px; background: var(--base-deep); }
.footer-row { display: flex; justify-content: space-between; gap: 28px 40px; flex-wrap: wrap; align-items: flex-start; }
.footer-tag { font-size: .88rem; margin-top: 6px; color: var(--grey-faint); max-width: 30ch; }
.footer-nav { display: grid; grid-template-columns: repeat(2, auto); gap: 6px 28px; font-size: .88rem; }
.footer-nav a { color: var(--grey); }
.footer-meta { display: flex; flex-direction: column; gap: 4px; font-size: .88rem; color: var(--grey-faint); text-align: right; }
.footer-meta a { color: var(--grey); }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .demo-band { grid-template-columns: 1fr; gap: 26px; }
  .demo-band-actions { max-width: 420px; }
}
@media (max-width: 900px) {
  .grid3, .steps, .how-grid { grid-template-columns: 1fr; }
  .cols, .ticks { columns: 1; }
  .hero-grid { grid-template-columns: 1fr; gap: 4px; }
  .hero-visual { min-height: 300px; }
  .hero-dots { -webkit-mask-image: radial-gradient(closest-side at 50% 45%, #000 20%, transparent 95%); mask-image: radial-gradient(closest-side at 50% 45%, #000 20%, transparent 95%); }
}
@media (max-width: 760px) {
  .shell { padding: 0 20px; }
  .nav-links {
    /* full-height panel: the body is scroll-locked while it's open, so the
       menu should own the screen rather than leaving dead page below it */
    display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
    height: calc(100dvh - var(--nav-h)); overflow-y: auto;
    background: var(--base-deep);
    flex-direction: column; align-items: stretch; padding: 8px 20px 32px; gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    font-size: 1.02rem; padding: 15px 2px; border-bottom: 1px solid var(--line);
    color: var(--white);
  }
  .nav-links .nav-menu-cta {
    display: inline-flex; margin-top: 18px; border-bottom: 0;
    color: var(--base-deep); padding: 14px 26px;
  }
  .nav-links .nav-menu-cta:hover { color: var(--base-deep); }
  .nav-cta { display: none; }
  .nav-burger { display: block; margin-left: auto; }
  .nav .wordmark { padding: 6px 0; }          /* 34px -> 46px tap target */
  .footer-meta a { padding: 5px 0; }
  .nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero-grid { padding-top: 40px; padding-bottom: 52px; }
  .hero-visual { min-height: 250px; margin-bottom: 4px; }
  .lede { margin: 1.2rem 0 1.8rem; }
  .cta-row { gap: 12px; }
  .cta-row .btn { flex: 1 1 100%; }
  .hero-note { margin-top: 1.2rem; }

  .section { padding: 60px 0; }
  .panel, .code-panel { padding: 24px 20px 20px; }
  .deliverables, .try { padding: 24px 22px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .code-row { flex-direction: column; }
  .code-row input { text-align: center; }

  .notes li { padding: 16px 0 16px 18px; }
  .notes li::before { top: 23px; }

  .eyebrow { font-size: .75rem; letter-spacing: .14em; }

  .footer { padding: 36px 0 44px; }
  .footer-row { flex-direction: column; gap: 24px; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; font-size: .95rem; }
  .footer-nav a { padding: 9px 0; }
  .footer-meta { text-align: left; }
}
@media (max-width: 380px) {
  h1 { font-size: 2.1rem; }
  .hero-visual { min-height: 215px; }
}