:root {
  color-scheme: dark;
  --bg: #08111f;
  --bg-top: #0d1a2d;
  --bg-bottom: #050b15;
  --panel: rgba(11, 20, 35, 0.86);
  --panel-strong: rgba(14, 25, 43, 0.96);
  --panel-soft: rgba(18, 32, 54, 0.72);
  --text: #e9f1ff;
  --muted: #9fb2cf;
  --border: rgba(126, 156, 201, 0.18);
  --accent: #6ca0ff;
  --accent-2: #54d2ff;
  --accent-soft: rgba(108, 160, 255, 0.16);
  --success: #75e7bc;
  --warning: #ffd36c;
  --danger: #ff8b8b;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
  --radius-xl: 26px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #edf3fb;
  --bg-top: #f6f9fd;
  --bg-bottom: #e4edf8;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --panel-soft: rgba(240, 246, 255, 0.88);
  --text: #162135;
  --muted: #60728f;
  --border: rgba(85, 116, 166, 0.16);
  --accent: #2d67d7;
  --accent-2: #148dcf;
  --accent-soft: rgba(45, 103, 215, 0.1);
  --success: #0f8c60;
  --warning: #a45c00;
  --danger: #b42318;
  --shadow: 0 28px 80px rgba(18, 44, 84, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(108, 160, 255, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(84, 210, 255, 0.14), transparent 24%),
    linear-gradient(155deg, var(--bg-top) 0%, var(--bg) 52%, var(--bg-bottom) 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.32;
  z-index: 0;
}

body::before {
  top: 4rem;
  right: -6rem;
  background: rgba(84, 210, 255, 0.22);
}

body::after {
  bottom: -6rem;
  left: -5rem;
  background: rgba(108, 160, 255, 0.18);
}

main {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 42px;
}

.shell {
  display: grid;
  gap: 16px;
}

.hero,
.tool-panel,
.tab-strip,
.metric,
.sub-panel {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) auto;
  gap: 18px;
  align-items: start;
  padding: 24px;
  border-radius: var(--radius-xl);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 12ch;
  font-size: clamp(2.3rem, 4vw, 4.25rem);
  line-height: 0.97;
  letter-spacing: -0.06em;
}

.hero p,
.panel-heading p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.hero p {
  max-width: 70ch;
  margin-top: 14px;
}

.hero-actions {
  display: grid;
  gap: 12px;
  justify-items: end;
  min-width: 180px;
}

.hero-control-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  width: min(100%, 420px);
}

.hero-note {
  width: min(220px, 100%);
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(108, 160, 255, 0.16), rgba(84, 210, 255, 0.08));
  border: 1px solid rgba(108, 160, 255, 0.18);
}

.hero-note strong {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-note span {
  display: block;
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  font-size: 1.08rem;
  font-weight: 800;
}

.theme-toggle,
button,
.tab-button {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

button:not(.tab-button):not(.secondary-button) {
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #ffffff;
}

button:hover,
.tab-button:hover,
.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: rgba(108, 160, 255, 0.38);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.66;
}

.secondary-button {
  background: var(--panel-strong);
}

.tab-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px;
  border-radius: var(--radius-xl);
}

.tab-button {
  flex: 0 0 auto;
}

.tab-button.active {
  background: linear-gradient(145deg, rgba(108, 160, 255, 0.28), rgba(84, 210, 255, 0.12));
  border-color: rgba(108, 160, 255, 0.42);
}

.tool-panel {
  display: grid;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-xl);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: grid;
}

.panel-heading {
  display: grid;
  gap: 8px;
}

.panel-heading h2 {
  font-size: 1.3rem;
  letter-spacing: -0.04em;
}

.tool-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: end;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.field-group {
  display: grid;
  gap: 9px;
}

label,
.metric-title,
.analysis-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

input,
select,
textarea {
  width: 100%;
  min-height: 54px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-strong);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

textarea {
  min-height: 220px;
  padding: 14px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.5;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(108, 160, 255, 0.56);
  box-shadow: 0 0 0 4px rgba(108, 160, 255, 0.12);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  display: grid;
  gap: 9px;
  min-height: 92px;
  padding: 16px;
  border-radius: var(--radius-lg);
}

.metric strong {
  overflow-wrap: anywhere;
  font-size: clamp(1.18rem, 2vw, 1.7rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.tool-result {
  min-height: 62px;
  margin: 0;
  padding: 14px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel-soft);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.5;
  white-space: pre-wrap;
}

.accent-result {
  border-color: rgba(108, 160, 255, 0.24);
  background: linear-gradient(145deg, rgba(108, 160, 255, 0.14), rgba(84, 210, 255, 0.06)), var(--panel-soft);
}

.builder-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.builder-grid.compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.full-span {
  grid-column: 1 / -1;
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.sub-panel {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius-lg);
}

.sub-panel h3 {
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-strong);
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.92rem;
}

.toggle input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--accent);
}

.analysis-layout,
.analysis-list {
  display: grid;
  gap: 10px;
}

.analysis-section {
  display: grid;
  gap: 10px;
}

.analysis-heading {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.analysis-card,
.analysis-row {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-strong);
}

.analysis-row {
  overflow-wrap: anywhere;
  line-height: 1.5;
}

.analysis-card {
  display: grid;
  gap: 6px;
}

.analysis-value {
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.45;
}

.muted-row {
  color: var(--muted);
}

.status-pass {
  color: var(--success);
}

.status-warn {
  color: var(--warning);
}

.status-fail {
  color: var(--danger);
}

.severity-critical {
  border-color: color-mix(in srgb, var(--danger) 42%, var(--border));
}

.severity-warning {
  border-color: color-mix(in srgb, var(--warning) 42%, var(--border));
}

.severity-info {
  border-color: color-mix(in srgb, var(--accent) 34%, var(--border));
}

@media (max-width: 980px) {
  .hero,
  .split-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    justify-items: start;
  }

  .hero-control-row {
    justify-content: flex-start;
    width: 100%;
  }

  .result-grid,
  .builder-grid,
  .builder-grid.compact,
  .analysis-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  main {
    width: min(100% - 18px, 1180px);
    padding: 18px 0 28px;
  }

  .hero,
  .tool-panel,
  .sub-panel {
    padding: 18px;
  }

  h1 {
    max-width: none;
  }

  .tool-row {
    grid-template-columns: 1fr;
  }

  .button-row {
    justify-content: stretch;
  }

  .button-row button,
  .tool-row button {
    width: 100%;
  }
}