:root {
  --bg: #0d1014;
  --surface: #13171c;
  --ink: #d2d5d7;
  --bright: #eef0f1;
  --text: #a9aeb4;
  --muted: #7a818a;
  --line: #22272e;
  --hover: #1a1f26;
  --accent: #c9a24e;
  --accent-bright: #e8c872;
  --accent-soft: rgb(201 162 78 / 0.13);
  --bad: #e07a6a;
  --caps: "Cinzel", "Cormorant Garamond", serif;
  --serif: "Cormorant Garamond", Georgia, serif;
  --font: "Inter", "Segoe UI", system-ui, sans-serif;
  --silver: linear-gradient(180deg, #ffffff 0%, #e2e4e6 40%, #9da2a8 58%, #d9dcdf 78%, #f4f5f6 100%);
  --gold: linear-gradient(180deg, #f0d48a 0%, #d4ad57 55%, #b8913f 100%);
  --card: linear-gradient(180deg, rgb(24 29 36 / 0.82), rgb(17 20 25 / 0.82));
  --card-shadow: none;
  --page-bg: radial-gradient(1200px 520px at 50% -180px, rgb(201 162 78 / 0.10), transparent 70%);
  --bar-bg: rgb(13 16 20 / 0.86);
  --field-bg: rgb(0 0 0 / 0.25);
  --on-gold: #17130a;
  color-scheme: dark;
}

/* Light theme: the warm paper of Vavilon Mail's light mode */
:root[data-theme="light"] {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --ink: #1f242b;
  --bright: #0d1014;
  --text: #48505a;
  --muted: #69717b;
  --line: #e3ded3;
  --hover: #eeeae1;
  --accent: #a17a26;
  --accent-bright: #86621a;
  --accent-soft: rgb(161 122 38 / 0.12);
  --bad: #b8483a;
  --silver: linear-gradient(180deg, #3a4048 0%, #14181d 100%);
  --card: linear-gradient(180deg, #ffffff, #fdfcf9);
  --card-shadow: 0 10px 30px rgb(60 45 15 / 0.08);
  --page-bg: radial-gradient(ellipse 120% 70% at 50% 0%, #fdfcf8 0%, #f6f4ef 60%, #eeeae1 100%);
  --bar-bg: rgb(250 248 243 / 0.92);
  --field-bg: #ffffff;
  color-scheme: light;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page-bg), var(--bg);
  color: var(--text);
  font: 400 16px/1.65 var(--font);
}

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; border-radius: 4px; }

.skip { position: absolute; left: -9999px; top: 8px; z-index: 10; padding: 8px 14px; background: var(--surface); border-radius: 8px; }
.skip:focus { left: 16px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

header.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--bar-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent, rgb(201 162 78 / 0.55), transparent) 1;
}
header.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }

.lockup { display: flex; align-items: center; gap: 12px; color: inherit; flex-shrink: 0; }
.lockup:hover { text-decoration: none; }
.lockup img { width: 38px; height: 38px; }
.lockup .word {
  font: 700 22px/1 var(--caps);
  letter-spacing: 0.22em;
  background: var(--silver);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lockup .sub { display: block; margin-top: 4px; font: 600 10px/1 var(--caps); letter-spacing: 0.24em; color: var(--accent); text-transform: uppercase; }

nav.links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
nav.links a { color: var(--ink); }
nav.links .theme {
  display: grid; place-items: center;
  width: 30px; height: 30px; padding: 0;
  border: 1px solid var(--line); border-radius: 50%;
  background: transparent; color: var(--ink); cursor: pointer;
}
nav.links .theme:hover { background: var(--hover); }
nav.links .theme svg { width: 15px; height: 15px; }
nav.links .theme .sun { display: none; }
:root[data-theme="light"] nav.links .theme .sun { display: block; }
:root[data-theme="light"] nav.links .theme .moon { display: none; }
nav.links a.lang { padding: 3px 9px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; }

.button {
  display: inline-block;
  padding: 11px 20px;
  border: 0;
  border-radius: 10px;
  background: var(--gold);
  color: var(--on-gold);
  font: 600 15px/1.2 var(--font);
  cursor: pointer;
}
.button:hover { text-decoration: none; filter: brightness(1.06); }
.button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.button.ghost:hover { background: var(--hover); }

.hero { padding: 72px 0 36px; }
.hero h1 { margin: 0 0 16px; font: 600 clamp(36px, 6vw, 58px)/1.06 var(--serif); color: var(--bright); max-width: 800px; }
.hero p { margin: 0; max-width: 700px; font-size: 18px; color: var(--ink); }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.product-hero .tagline { font-size: 20px; color: var(--accent-bright); margin-bottom: 14px; }
.product-hero .meta { margin-top: 14px; font-size: 14px; color: var(--muted); }

section { padding: 34px 0; }
h2 { margin: 0 0 18px; font: 600 32px/1.2 var(--serif); color: var(--bright); }
h3 { margin: 0 0 6px; font: 600 22px/1.2 var(--serif); color: var(--bright); }
.eyebrow { font: 600 11px/1 var(--caps); letter-spacing: 0.24em; color: var(--accent); text-transform: uppercase; margin-bottom: 10px; }
.lead { font-size: 18px; color: var(--ink); max-width: 760px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--card-shadow);
}
.card p { margin: 0; font-size: 15px; }
a.card { display: block; color: inherit; transition: border-color 0.15s, transform 0.15s; }
a.card:hover { text-decoration: none; border-color: rgb(201 162 78 / 0.45); transform: translateY(-2px); }
.product p { margin-bottom: 16px; }
.product .more { font-size: 14px; color: var(--accent-bright); }
.badge { display: inline-block; margin-bottom: 12px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--accent-soft); color: var(--accent-bright); }

.points .point { padding: 4px 2px; }
.points .point p { margin: 0; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li { display: flex; gap: 16px; align-items: flex-start; }
.steps .num {
  flex: none;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid rgb(201 162 78 / 0.5);
  color: var(--accent-bright);
  font: 600 16px/1 var(--serif);
}
.steps p { margin: 0; }

dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 22px; margin: 0; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; color: var(--ink); }

.cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; margin: 34px 0 10px; }
.cta h2 { margin-bottom: 6px; }
.cta p { margin: 0; }

.prose { max-width: 780px; padding: 48px 0 12px; }
.prose h1 { font: 600 44px/1.12 var(--serif); color: var(--bright); margin: 0 0 12px; }
.prose h2 { font-size: 25px; margin: 30px 0 10px; }
.prose p, .prose li { color: var(--ink); }
.prose .updated { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

.qa { border-bottom: 1px solid var(--line); padding: 16px 0; }
.qa summary { cursor: pointer; font: 600 20px/1.3 var(--serif); color: var(--bright); list-style: none; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; float: right; color: var(--accent); font-family: var(--font); }
.qa[open] summary::after { content: "−"; }
.qa p { margin: 10px 0 0; }

.contact { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.contact .side { display: grid; gap: 16px; }
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: var(--ink); }
.form input, .form select, .form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--field-bg);
  color: var(--bright);
  font: 400 15px/1.4 var(--font);
}
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form .check { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--text); }
.form .check input { width: auto; margin-top: 3px; accent-color: var(--accent); }
.form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .button { justify-self: start; }
.form-error { margin: 0; padding: 10px 12px; border-radius: 10px; background: rgb(224 122 106 / 0.12); color: var(--bad); font-size: 14px; }

footer { border-top: 1px solid var(--line); margin-top: 48px; padding: 28px 0 40px; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px 32px; }
footer .foot-name { color: var(--ink); font-weight: 600; margin-bottom: 4px; }
footer .foot-side { display: grid; gap: 8px; justify-items: end; align-content: start; }
footer nav { display: flex; gap: 18px; }

@media (max-width: 760px) {
  header.bar .wrap { flex-wrap: wrap; padding-top: 12px; padding-bottom: 10px; gap: 10px; }
  nav.links { width: 100%; justify-content: space-between; gap: 10px; font-size: 13px; overflow-x: auto; }
  .hero { padding-top: 40px; }
  .contact { grid-template-columns: 1fr; }
  dl.facts { grid-template-columns: 1fr; gap: 2px; }
  dl.facts dd { margin-bottom: 10px; }
  footer .foot-side { justify-items: start; }
  .prose h1 { font-size: 36px; }
}