/* DeckDiag website. One dark look on purpose: it matches the app. */
:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --surface: #141922;
  --surface-hi: #1b222d;
  --border: #262e3b;
  --text: #eef1f5;
  --dim: #9aa4b2;
  --cyan: #35e0ff;
  --violet: #8b7bff;
  --green: #3dff9a;
  --amber: #ffb020;
  --radius: 14px;
  --display: "Orbitron", "Eurostile", "Arial Black", sans-serif;
  --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
html { background: var(--bg); -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;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
.narrow { max-width: 760px; }

/* Top bar */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.top .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo img { width: 32px; height: 32px; }
.wordmark { font-family: var(--display); font-weight: 800; letter-spacing: 0.06em; font-size: 19px; }
.wordmark span, .grad {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav { margin-left: auto; display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--dim); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }
@media (max-width: 560px) { .nav .hide-sm { display: none; } .nav { gap: 14px; } }

/* Hero */
.hero { padding: 40px 0 24px; text-align: center; }
.hero .art { border-radius: var(--radius); margin: 0 auto 28px; max-width: 900px; width: 100%; }
.hero h1 {
  font-family: var(--display); font-weight: 800; letter-spacing: 0.02em;
  font-size: clamp(30px, 5.6vw, 52px); line-height: 1.12; margin: 0 auto 16px; max-width: 18ch;
  text-wrap: balance;
}
.hero .lead { color: var(--dim); font-size: clamp(17px, 2.2vw, 20px); max-width: 60ch; margin: 0 auto 28px; text-wrap: pretty; }
.eyebrow {
  font-family: var(--display); font-weight: 700; font-size: 12.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--dim); margin: 0 0 14px;
}
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 600; font-size: 16px;
  text-decoration: none; border: 1px solid var(--border); color: var(--text); background: var(--surface);
}
.btn.primary { background: linear-gradient(90deg, var(--cyan), var(--violet)); color: #061018; border: 0; }
.btn:hover { filter: brightness(1.08); }
.note { color: var(--dim); font-size: 14px; margin-top: 12px; }

/* Sections */
section { padding: 56px 0; }
section + section { border-top: 1px solid var(--border); }
h2 {
  font-family: var(--display); font-weight: 700; font-size: clamp(20px, 3vw, 26px);
  letter-spacing: 0.04em; margin: 0 0 10px; text-wrap: balance;
}
.sub { color: var(--dim); margin: 0 0 28px; max-width: 62ch; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 22px 20px;
}
.card h3 { font-size: 18px; margin: 0 0 6px; }
.card .who { font-size: 13.5px; color: var(--cyan); font-weight: 600; margin: 0 0 12px; }
.card p { margin: 0; color: var(--dim); }
.card ul { margin: 10px 0 0; padding-left: 1.1em; color: var(--dim); }
.card li { margin: 4px 0; }
.card li::marker { color: var(--green); }
.card .tag {
  display: inline-block; font-family: var(--mono); font-size: 12px; color: var(--green);
  border: 1px solid color-mix(in srgb, var(--green) 45%, transparent); border-radius: 6px;
  padding: 1px 8px; margin-bottom: 12px;
}
.card.accent-cyan { border-top: 3px solid var(--cyan); }
.card.accent-violet { border-top: 3px solid var(--violet); }
.card.accent-green { border-top: 3px solid var(--green); }

.steps { counter-reset: s; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.step::before {
  counter-increment: s; content: counter(s);
  font-family: var(--display); font-weight: 800; font-size: 22px;
  display: block; margin-bottom: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.step h3 { margin: 0 0 4px; font-size: 17px; }
.step p { margin: 0; color: var(--dim); font-size: 15.5px; }

.models { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.models h3 { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); margin: 0 0 8px; font-family: var(--display); }
.models ul { list-style: none; padding: 0; margin: 0; }
.models li { font-family: var(--mono); font-size: 14.5px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.models li small { color: var(--dim); font-family: var(--body); font-size: 12.5px; margin-left: 6px; }

.band {
  background: linear-gradient(135deg, color-mix(in srgb, var(--cyan) 14%, var(--surface)), color-mix(in srgb, var(--violet) 16%, var(--surface)));
  border: 1px solid var(--border); border-radius: 20px; padding: 36px 28px; text-align: center;
}
.band h2 { margin-bottom: 8px; }
.band p { color: var(--dim); margin: 0 auto 22px; max-width: 56ch; }

/* Legal / text pages */
.page-head { padding: 44px 0 24px; border-bottom: 1px solid var(--border); margin-bottom: 28px; }
.page-head h1 { font-family: var(--display); font-weight: 800; font-size: clamp(26px, 5vw, 36px); margin: 0; letter-spacing: 0.03em; }
.page-head .meta { font-family: var(--mono); font-size: 13px; color: var(--dim); margin-top: 10px; }
.prose { padding-bottom: 40px; }
.prose h2 {
  font-size: 15.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan);
  margin: 36px 0 10px;
}
.prose h3 { font-size: 17px; margin: 24px 0 6px; }
.prose p, .prose li { max-width: 68ch; }
.prose ul { padding-left: 1.2em; }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--violet); }
.prose .caps { font-size: 14.5px; letter-spacing: 0.01em; }
.prose .store { border-left: 3px solid var(--violet); padding-left: 14px; }
.summary {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--green);
  border-radius: 10px; padding: 16px 20px; margin: 0 0 28px;
}
.summary p { margin: 0; }
.summary strong { color: var(--green); }
.table { overflow-x: auto; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { font-weight: 600; color: var(--dim); font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; }
td:first-child { font-weight: 500; }
.contact { font-family: var(--mono); color: var(--cyan); }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 600; }
details p, details ol, details ul { color: var(--dim); }
details[open] summary { margin-bottom: 8px; }

/* Footer */
footer.site { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--dim); font-size: 14px; }
footer.site .links { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 14px; }
footer.site .links a { color: var(--text); text-decoration: none; }
footer.site p { margin: 6px 0; max-width: 80ch; }