:root {
  --blue: #02a4ef;
  --blue-d: #0286c4;
  --char: #1b1b1b;
  --ink: #242424;
  --paper: #f6f5f1;
  --card: #ffffff;
  --line: #d9d6ce;
  --muted: #5c5c57;
  --warn: #8a3b00;
  --warn-bg: #fff4e5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

body {
  display: flex;
  flex-direction: column;
}

a { color: var(--blue-d); }

.site-header, .site-footer {
  background: linear-gradient(120deg, #141414 0%, #1f1f1f 52%, #33322d 100%);
  color: #fff;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header nav a,
.site-footer a { color: #fff; }

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
  color: #fff;
}

.brand-name {
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-tag {
  opacity: 0.8;
  font-size: 0.9rem;
}

.site-main {
  flex: 1;
  width: min(760px, calc(100% - 2rem));
  margin: 2rem auto 3rem;
}

.site-footer {
  display: block;
  font-size: 0.85rem;
  color: #cfcbc3;
}

.hero h1, .card h1 {
  margin: 0 0 0.5rem;
  line-height: 1.15;
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--ink);
}

.subtitle {
  margin: 0 0 0.85rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0;
}

.lede, .card p {
  color: var(--muted);
  line-height: 1.5;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 1.25rem;
}

.stack {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-weight: 600;
}

input {
  font: inherit;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.btn-primary, .btn-secondary {
  display: inline-block;
  border: 0;
  border-radius: 8px;
  padding: 0.75rem 1.1rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--char);
  color: #fff;
}

.fine-print {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 400;
}

.banner {
  padding: 0.75rem 0.9rem;
  border-radius: 8px;
}

.banner-warn {
  background: var(--warn-bg);
  color: var(--warn);
}

.disclaimer {
  margin-top: 1.5rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: #f3f8fb;
}

.disclaimer h2 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.disclaimer p,
.disclaimer li {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.disclaimer ul {
  margin: 0.4rem 0 0.8rem;
  padding-left: 1.2rem;
}

.demo-box {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.score-hero {
  text-align: center;
}

.score-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.75rem;
}

.score-value {
  font-size: 4rem;
  font-weight: 700;
  margin: 0.2rem 0 0;
  color: var(--char);
}

.section-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.1rem;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.meter {
  height: 8px;
  background: #eceae4;
  border-radius: 99px;
  overflow: hidden;
  margin-top: 0.4rem;
}

.meter span {
  display: block;
  height: 100%;
  background: var(--blue);
}