:root {
  color-scheme: light;
  --bg: #f5f7f7;
  --bg-alt: #ffffff;
  --ink: #1f1f1f;
  --muted: #63666a;
  --accent: #c8102e;
  --accent-dark: #8f0b20;
  --green: #2e8b57;
  --yellow: #d7a42e;
  --red: #c8102e;
  --dark: #2b2b2b;
  --card: #ffffff;
  --border: #e3e3e3;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

h1,
h2,
h3 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  margin: 0 0 12px;
}

p {
  margin: 0 0 12px;
  line-height: 1.6;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--accent);
  color: #fff;
  padding: 14px 20px;
  border-radius: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-mark {
  font-size: 1.2rem;
}

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

.brand-tag {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.powered-by {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  padding: 6px 10px;
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.powered-by img {
  height: 26px;
  width: auto;
  display: block;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: center;
  margin-bottom: 36px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--accent);
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
}

.key-message {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  background: #fff;
  border: 1px solid var(--border);
  display: grid;
  gap: 6px;
}

.key-message span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.hero-card {
  background: var(--card);
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.status-badge {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 16px 0 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.status-light {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--dark);
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, 0.6);
}

.status-name {
  font-weight: 700;
  font-size: 1.2rem;
}

.status-level {
  color: var(--muted);
}

.score {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: 14px;
}

.score span {
  color: var(--muted);
}

.score strong {
  font-size: 2.2rem;
  color: var(--accent);
}

.score-meta {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.score-meta div {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 12px;
}

.score-meta span {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}

.section {
  margin-top: 36px;
}

.section-header {
  margin-bottom: 16px;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  padding: 22px;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.plain {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.traffic-legend {
  display: grid;
  gap: 14px;
}

.legend-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
}

.dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-block;
}

.dot.green { background: var(--green); }
.dot.yellow { background: var(--yellow); }
.dot.red { background: var(--red); }
.dot.dark { background: var(--dark); }

.form-grid {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 500;
}

input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 1rem;
}

.ratio {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  background: var(--bg);
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.ratio span {
  color: var(--muted);
  font-size: 0.85rem;
}

.formula {
  font-family: "Courier New", Courier, monospace;
  background: var(--bg);
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.breakdown {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.breakdown div {
  display: flex;
  justify-content: space-between;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
}

.traffic-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 16px;
}

.traffic-light {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--dark);
  box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.6);
}

.traffic-info span {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
}

.traffic-info strong {
  font-size: 1.4rem;
}

.impact-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.impact-card {
  background: var(--card);
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.impact-card span {
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}

.recommendations {
  display: grid;
  gap: 12px;
}

.recommendations .headline {
  font-weight: 700;
  font-size: 1.1rem;
}

.recommendations ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.recommendations li {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
}

.recommendations .note {
  color: var(--muted);
  font-size: 0.9rem;
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 10px;
}

.footer {
  margin-top: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.status-green .status-light,
.status-green .traffic-light { background: var(--green); }
.status-yellow .status-light,
.status-yellow .traffic-light { background: var(--yellow); }
.status-red .status-light,
.status-red .traffic-light { background: var(--red); }
.status-critical .status-light,
.status-critical .traffic-light { background: var(--dark); }

@media (max-width: 720px) {
  .page {
    padding: 24px 16px 40px;
  }
  .hero-card {
    order: -1;
  }
}