/* ============================================================
   BASE  —  structural skeleton only.

   This file deliberately contains NO colour and NO layout
   decisions. Everything visual comes from the axis modules that
   are concatenated after it, and from the generated palette:

     base.css
     layout-*.css     arrangement   (grid / flow / alignment)
     type-*.css       fonts, sizes, weights, letter-spacing
     skin-*.css       surfaces, borders, radius, shadows
     bg-*.css         page background
     accent-*.css     how the accent colour is applied
     :root { ... }    generated palette (appended last)

   Variables the palette must provide:
     --bg --panel --surface --line --text --muted
     --accent --accent-2 --on-accent --radius --shadow --max
     --font-body --font-display --font-ui
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--size-base, 16px);
  line-height: var(--leading, 1.65);
  color: var(--text);
  background-color: var(--bg);
  background-image: var(--bg-image, none);
  background-size: var(--bg-size, auto);
  background-position: var(--bg-position, center);
  background-attachment: var(--bg-attachment, scroll);
}

a {
  color: var(--accent);
  text-decoration: var(--link-decoration, none);
  text-underline-offset: 3px;
}
a:hover { text-decoration: underline; }

.shell {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--shell-padding, 0 24px 64px);
}

/* ---------- top bar ---------- */

.topbar {
  display: flex;
  align-items: var(--topbar-align, center);
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: var(--topbar-padding, 22px 0);
  margin-bottom: var(--topbar-gap, 44px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-size: var(--brand-size, 1.2rem);
  font-weight: var(--brand-weight, 700);
  letter-spacing: var(--brand-tracking, -.01em);
  text-transform: var(--brand-case, none);
  color: var(--text);
}
.brand:hover { color: var(--text); text-decoration: none; }

.brand .mark {
  width: var(--mark-size, 26px);
  height: var(--mark-size, 26px);
  flex: none;
}

.legal-nav {
  display: flex;
  gap: var(--nav-gap, 22px);
  flex-wrap: wrap;
}

.legal-nav a {
  font-family: var(--font-ui);
  font-size: var(--nav-size, .86rem);
  font-weight: var(--nav-weight, 500);
  letter-spacing: var(--nav-tracking, 0);
  text-transform: var(--nav-case, none);
  color: var(--muted);
}
.legal-nav a:hover { color: var(--text); text-decoration: none; }
.legal-nav a.active { color: var(--text); }

/* ---------- hero ---------- */

.hero {
  padding: var(--hero-padding, 8px 0 44px);
  text-align: var(--hero-align, left);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 var(--badge-gap, 22px);
  padding: var(--badge-padding, 6px 14px);
  font-family: var(--font-ui);
  font-size: var(--badge-size, .76rem);
  font-weight: 600;
  letter-spacing: var(--badge-tracking, .1em);
  text-transform: var(--badge-case, uppercase);
}

.dot {
  width: 8px;
  height: 8px;
  flex: none;
  animation: kbdot 1.9s ease-in-out infinite;
}

@keyframes kbdot {
  0%, 100% { opacity: 1; }
  50%      { opacity: .3; }
}

.hero h1 {
  margin: 0 0 var(--h1-gap, 20px);
  font-family: var(--font-display);
  font-size: var(--h1-size, clamp(2rem, 4.6vw, 3.1rem));
  font-weight: var(--h1-weight, 800);
  line-height: var(--h1-leading, 1.1);
  letter-spacing: var(--h1-tracking, -.03em);
  text-transform: var(--h1-case, none);
}

.tagline {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: var(--tagline-size, 1.12rem);
  font-weight: var(--tagline-weight, 500);
  font-style: var(--tagline-style, normal);
}

.intro {
  margin: 0;
  max-width: var(--measure, 56ch);
  color: var(--muted);
}

/* ---------- cards ---------- */

.card {
  padding: var(--card-padding, 30px);
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow, none);
}

.card h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--h2-size, 1.24rem);
  font-weight: var(--h2-weight, 700);
  letter-spacing: var(--h2-tracking, -.01em);
}

.muted {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: var(--muted-size, .95rem);
}

/* ---------- form ---------- */

.field { margin-bottom: 16px; }

.field label {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-ui);
  font-size: var(--label-size, .78rem);
  font-weight: var(--label-weight, 600);
  letter-spacing: var(--label-tracking, .08em);
  text-transform: var(--label-case, uppercase);
  color: var(--muted);
}

.field input,
.field textarea {
  width: 100%;
  padding: var(--input-padding, 13px 15px);
  font: inherit;
  color: var(--text);
  background: var(--input-bg, var(--surface));
  border: 1px solid var(--line);
  border-radius: var(--input-radius, calc(var(--radius) - 6px));
  outline: none;
  transition: border-color .16s, box-shadow .16s, background .16s;
}

.field textarea { resize: vertical; min-height: 122px; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.btn {
  display: inline-block;
  padding: var(--btn-padding, 13px 26px);
  font-family: var(--font-ui);
  font-size: var(--btn-size, 1rem);
  font-weight: var(--btn-weight, 600);
  letter-spacing: var(--btn-tracking, 0);
  text-transform: var(--btn-case, none);
  border: 1px solid var(--line);
  border-radius: var(--btn-radius, 999px);
  cursor: pointer;
  text-decoration: none;
  transition: background .16s, color .16s, border-color .16s, transform .16s, box-shadow .16s;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .55; cursor: progress; }

.status {
  min-height: 20px;
  margin: 14px 0 0;
  font-size: .92rem;
  color: var(--muted);
}

/* ---------- developer block ---------- */

.dev {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--dev-min, 210px), 1fr));
  gap: var(--dev-gap, 14px);
  margin: var(--dev-margin, 18px 0 0);
}

.dev > div {
  padding: var(--dev-item-padding, 14px 16px);
  border-radius: var(--dev-radius, calc(var(--radius) - 6px));
}

.dev dt {
  font-family: var(--font-ui);
  font-size: var(--dt-size, .72rem);
  font-weight: var(--dt-weight, 700);
  letter-spacing: var(--dt-tracking, .1em);
  text-transform: uppercase;
  color: var(--muted);
}

.dev dd {
  margin: 5px 0 0;
  font-weight: var(--dd-weight, 600);
  word-break: break-word;
}

/* ---------- legal pages ---------- */

.legal { padding: var(--legal-padding, 4px 0 0); }

.crumbs {
  display: flex;
  gap: 9px;
  align-items: center;
  margin: 0 0 16px;
  font-size: var(--crumbs-size, .82rem);
  color: var(--muted);
}
.crumbs span { opacity: .45; }

.legal h1 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--legal-h1-size, clamp(1.75rem, 4.2vw, 2.5rem));
  font-weight: var(--h1-weight, 800);
  line-height: 1.12;
  letter-spacing: var(--h1-tracking, -.025em);
}

.updated {
  margin: 0 0 30px;
  padding-bottom: 20px;
  font-size: .86rem;
  color: var(--muted);
}

.legal article { padding: var(--card-padding, 30px); }

.legal article .sec + .sec { margin-top: 0; }

.legal article .sec > h2,
.legal article .sec > summary {
  display: flex;
  gap: 12px;
  align-items: baseline;
  margin: var(--sec-gap, 30px) 0 10px;
  font-family: var(--font-display);
  font-size: var(--sec-size, 1.1rem);
  font-weight: var(--sec-weight, 700);
  list-style: none;
}
.legal article .sec:first-child > :is(h2, summary) { margin-top: 0; }

.legal article summary { cursor: pointer; user-select: none; -webkit-user-select: none; }
.legal article summary::-webkit-details-marker { display: none; }
.legal article summary::marker { content: ""; }
.legal article summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.legal article summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1;
  color: var(--accent);
}
.legal article details[open] > summary::after { content: "\2212"; }

.legal article .sec > h2 .num,
.legal article .sec > summary .num {
  font-family: var(--font-ui);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--accent);
}

.legal article p { margin: 0 0 15px; }

.legal-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

/* ---------- footer ---------- */

.footer {
  margin-top: var(--footer-gap, 46px);
  padding-top: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--font-ui);
  font-size: .86rem;
  color: var(--muted);
}
.footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer p { margin: 0; }

/* ---------- shared responsive floor ---------- */

@media (max-width: 640px) {
  :root {
    --card-padding: 22px 18px;
    --shell-padding: 0 18px 48px;
  }
  .footer { flex-direction: column; align-items: flex-start; }
  .hero { text-align: left; }
}

/* Layout 5 — Aside
   Main column for the pitch and the form, a narrow sticky column
   on the right for the developer details. */

:root {
  --max: 1160px;
  --measure: 52ch;
  --hero-padding: 8px 0 34px;
}

@media (min-width: 940px) {
  .shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    column-gap: 52px;
    align-items: start;
  }

  .topbar    { grid-column: 1 / -1; }
  .hero      { grid-column: 1; grid-row: 2; }
  .form-card { grid-column: 1; grid-row: 3; margin-top: 28px; }
  .dev-card  { grid-column: 2; grid-row: 2 / span 2; position: sticky; top: 24px; margin-top: 0; }
  .legal     { grid-column: 1 / -1; max-width: none; }
  .footer    { grid-column: 1 / -1; }
}

@media (max-width: 939px) {
  .card + .card { margin-top: 24px; }
}

/* Accent 4 - Duotone
   The second accent carries the weight, the first one carries the detail. */

a { color: var(--accent); }

.brand .mark { background: var(--accent-2); }

.badge { background: var(--surface); color: var(--accent-2); }
.badge .dot { background: var(--accent); }

.legal-nav a.active { color: var(--accent-2); }

.tagline { color: var(--accent); }

.btn { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

.btn.primary {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: var(--on-accent);
}
.btn.primary:hover { filter: brightness(.94); }

.field input:focus,
.field textarea:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.legal article .sec > h2 .num,
.legal article .sec > summary .num { color: var(--accent-2); }

.legal article summary::after { color: var(--accent-2); }
.legal article summary:hover { color: var(--accent); }
.status.ok { color: var(--accent); }

/* ---------- generated design for nguyenquangtho.info ---------- */
:root {
  --bg: #080c0a;
  --panel: #16271f;
  --surface: rgba(255, 255, 255, 0.045);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f3f6f5;
  --muted: #99a8a1;
  --accent: #96e4bd;
  --accent-2: #5cdb5c;
  --accent-soft: rgba(150, 228, 189, 0.22);
  --on-accent: #0e1b14;
  --radius: 999px;
  --shadow: 0 1px 2px rgba(41, 61, 51, 0.04);
  --input-bg: rgba(255, 255, 255, 0.045);
  --font-display: "Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  --font-ui: "Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  --size-base: 15px;
  --leading: 1.55;
  --h1-size: clamp(1.7rem, 3.6vw, 2.5rem);
  --h1-weight: 600;
  --h1-leading: 1.1;
  --h1-tracking: -0.03em;
  --h1-case: uppercase;
  --h1-gap: 20px;
  --tagline-size: 1.05rem;
  --tagline-weight: 400;
  --tagline-style: normal;
  --h2-size: 1.1rem;
  --h2-weight: 700;
  --h2-tracking: 0;
  --muted-size: .95rem;
  --badge-size: .72rem;
  --badge-tracking: .18em;
  --badge-padding: 5px 12px;
  --badge-gap: 22px;
  --badge-case: uppercase;
  --label-size: .8rem;
  --label-weight: 500;
  --label-case: uppercase;
  --label-tracking: .16em;
  --nav-size: .86rem;
  --nav-weight: 600;
  --nav-tracking: .1em;
  --nav-gap: 20px;
  --nav-case: uppercase;
  --btn-size: .88rem;
  --btn-weight: 700;
  --btn-tracking: .08em;
  --btn-case: uppercase;
  --btn-radius: 999px;
  --brand-size: 1.3rem;
  --brand-weight: 600;
  --brand-tracking: .14em;
  --brand-case: uppercase;
  --mark-size: 20px;
  --crumbs-size: .82rem;
  --dt-size: .76rem;
  --dt-weight: 700;
  --dt-tracking: .1em;
  --dd-weight: 500;
  --sec-size: 1rem;
  --sec-weight: 600;
  --sec-gap: 38px;
  --legal-h1-size: clamp(1.75rem, 4.2vw, 2.5rem);
  --link-decoration: underline;
  --measure: 52ch;
  --card-padding: 34px;
  --shell-padding: 0 32px 84px;
  --dev-item-padding: 14px 16px;
  --dev-gap: 14px;
  --dev-margin: 18px 0 0;
  --dev-min: 170px;
  --dev-radius: 16px;
  --input-padding: 11px 13px;
  --input-radius: 14px;
  --btn-padding: 15px 30px;
  --topbar-padding: 26px 0;
  --topbar-gap: 54px;
  --topbar-align: flex-end;
  --hero-padding: 12px 0 52px;
  --legal-padding: 8px 0 0;
  --footer-gap: 58px;
  --bg-position: center;
  --bg-attachment: scroll;
  --bg-image: linear-gradient(170deg, rgba(15, 31, 23, 0.05), transparent 45%, rgba(19, 11, 15, 0.04));
}