:root {
  color-scheme: dark;
  --bg: #10131b;
  --panel: #171b26;
  --panel-2: #202535;
  --ink: #f5f7fb;
  --muted: #aab2c4;
  --line: #30384c;
  --accent: #58c4a6;
  --accent-2: #e8bd5f;
  --danger: #ff7a72;
  --sky: #7fb9ff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.app-shell,
.tips-page {
  display: grid;
  gap: 20px;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.brand-lockup {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  min-width: 0;
}

.brand-logo {
  width: clamp(64px, 7vw, 88px);
  aspect-ratio: 1;
  display: block;
  border: 1px solid rgba(127, 185, 255, 0.32);
  border-radius: 18px;
  background: #09111f;
  object-fit: cover;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.32);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 4.1rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

h3 {
  margin-bottom: 12px;
  font-size: 0.98rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav-links a,
button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
}

.nav-links a {
  display: grid;
  place-items: center;
  padding: 0 14px;
  color: var(--muted);
  font-weight: 700;
}

.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--accent);
}

button {
  padding: 0 14px;
  cursor: pointer;
  font-weight: 800;
}

button:hover,
.nav-links a:hover {
  border-color: var(--accent);
}

.designer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(380px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.seo-intro {
  max-width: 980px;
}

.seo-intro h2 {
  margin-bottom: 8px;
}

.seo-intro p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.lane {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.lane-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 16px;
}

.canvas-panel {
  position: relative;
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    #121722;
  background-size: 32px 32px;
}

.canvas-panel.compact {
  min-height: 280px;
}

canvas {
  display: block;
  width: 100%;
  height: min(42vh, 420px);
  min-height: 280px;
}

.canvas-readout {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.canvas-readout span {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 7px 10px;
  background: rgba(16, 19, 27, 0.84);
  color: var(--muted);
  font-size: 0.82rem;
}

.metric-strip,
.test-dashboard,
.strict-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.metric-strip article,
.test-card,
.strict-summary div,
.recommendation-box,
.control-section,
.generator-form,
.standard-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.metric-strip article,
.test-card,
.strict-summary div {
  padding: 13px;
}

.metric-strip span,
.test-card span,
.strict-summary span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.metric-strip strong,
.test-card strong,
.strict-summary strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(1rem, 1.7vw, 1.55rem);
  line-height: 1.1;
}

.test-card {
  display: grid;
  align-content: start;
  gap: 6px;
  min-height: 118px;
}

.test-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.35;
}

.test-card.primary {
  background: linear-gradient(135deg, rgba(88, 196, 166, 0.18), var(--panel) 58%);
}

.test-card.good strong {
  color: var(--accent);
}

.test-card.warning strong {
  color: var(--accent-2);
}

.test-card.danger strong {
  color: var(--danger);
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.control-section,
.generator-form,
.recommendation-box {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.generator-form {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

label {
  display: grid;
  grid-template-columns: minmax(105px, 1fr) minmax(80px, 132px) 44px;
  gap: 9px;
  align-items: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.generator-form label,
label:has(select) {
  grid-template-columns: 1fr;
}

small,
output {
  color: var(--muted);
  font-size: 0.78rem;
}

input,
select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
  padding: 9px 10px;
}

input[type="range"] {
  padding: 0;
  accent-color: var(--accent);
}

.rec-item {
  display: grid;
  gap: 4px;
  border-top: 1px solid var(--line);
  padding: 10px 0;
}

.rec-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.rec-item strong {
  color: var(--ink);
}

.rec-item span,
.standard-card p,
.standard-card li {
  color: var(--muted);
  line-height: 1.45;
}

.rec-item.warning strong {
  color: var(--danger);
}

.rec-item.good strong {
  color: var(--accent);
}

.strict-box {
  max-height: 720px;
  overflow: auto;
}

.tips-hero {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
}

.tips-hero p {
  max-width: 850px;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.standards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.standard-card {
  padding: 18px;
}

.standard-card ul {
  margin: 0;
  padding-left: 18px;
}

@media (max-width: 1180px) {
  .designer-grid {
    grid-template-columns: 1fr;
  }

  .generator-form,
  .standards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .app-shell,
  .tips-page {
    padding: 14px;
  }

  .topbar,
  .lane-header {
    display: grid;
  }

  .brand-lockup {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 12px;
  }

  .brand-logo {
    width: 62px;
    border-radius: 14px;
  }

  .control-grid,
  .generator-form,
  .metric-strip,
  .test-dashboard,
  .strict-summary,
  .standards-grid {
    grid-template-columns: 1fr;
  }

  label {
    grid-template-columns: 1fr;
  }
}