:root, [data-theme="light"] {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem; --space-16: 4rem;
  --color-bg: #f7f6f2; --color-surface: #f9f8f5; --color-surface-2: #fbfbf9; --color-border: #d4d1ca; --color-divider: #dcd9d5;
  --color-text: #28251d; --color-text-muted: #66645f; --color-text-faint: #8c8a84; --color-text-inverse: #f9f8f4;
  --color-primary: #01696f; --color-primary-hover: #0c4e54; --color-primary-highlight: #cedcd8; --color-blue: #006494;
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1rem;
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06); --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --font-body: 'Satoshi', 'Inter', sans-serif; --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
}
[data-theme="dark"] {
  --color-bg: #171614; --color-surface: #1c1b19; --color-surface-2: #201f1d; --color-border: #393836; --color-divider: #262523;
  --color-text: #cdccca; --color-text-muted: #9a9894; --color-text-faint: #6f6d69; --color-text-inverse: #171614;
  --color-primary: #4f98a3; --color-primary-hover: #227f8b; --color-primary-highlight: #313b3b; --color-blue: #5591c7;
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2); --shadow-md: 0 4px 16px oklch(0 0 0 / 0.3);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-size-adjust: none; }
body { margin: 0; min-height: 100dvh; font-family: var(--font-body); background: var(--color-bg); color: var(--color-text); line-height: 1.55; font-size: var(--text-base); }
a, button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img, svg { display: block; max-width: 100%; }
input, select, textarea { width: 100%; border: 1px solid oklch(from var(--color-text) l c h / 0.16); background: var(--color-surface-2); color: var(--color-text); border-radius: var(--radius-md); padding: 0.8rem 0.9rem; }
textarea { resize: vertical; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: var(--space-4); top: var(--space-4); z-index: 100; background: var(--color-surface); padding: var(--space-3); border-radius: var(--radius-md); }
.site-header, .app-shell { width: min(1200px, calc(100% - 2rem)); margin: 0 auto; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); padding: var(--space-6) 0 var(--space-4); }
.brand-wrap { display: flex; align-items: center; gap: var(--space-4); }
.logo { width: 58px; height: 58px; color: var(--color-primary); }
.logo-ring, .logo-core, .logo-mark { stroke: currentColor; fill: none; stroke-width: 4; stroke-linecap: round; }
.logo-core { fill: currentColor; stroke: none; }
.eyebrow { margin: 0 0 var(--space-2); color: var(--color-text-muted); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2 { margin: 0; font-family: var(--font-display); line-height: 1.05; }
h1 { font-size: var(--text-lg); }
h2 { font-size: var(--text-xl); max-width: 16ch; }
p { color: var(--color-text-muted); }
.app-shell { display: grid; gap: var(--space-6); padding-bottom: var(--space-16); }
.grid { display: grid; gap: var(--space-6); }
.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: linear-gradient(180deg, var(--color-surface), var(--color-surface-2)); border: 1px solid oklch(from var(--color-text) l c h / 0.12); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); padding: var(--space-6); }
.hero-card { display: grid; grid-template-columns: 1.6fr 1fr; align-items: center; gap: var(--space-6); }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.hero-metrics div, .result-panel, .list-item { background: oklch(from var(--color-primary) l c h / 0.06); border: 1px solid oklch(from var(--color-primary) l c h / 0.18); border-radius: var(--radius-lg); padding: var(--space-4); }
.metric-label { display: block; color: var(--color-text-muted); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; }
.section-head { display: flex; justify-content: space-between; align-items: start; gap: var(--space-4); margin-bottom: var(--space-4); }
.stack-form { display: grid; gap: var(--space-4); }
.input-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
label { display: grid; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text); }
.primary-btn, .ghost-btn, .icon-btn { min-height: 44px; border-radius: var(--radius-full, 999px); border: 1px solid transparent; transition: background var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive), transform var(--transition-interactive); }
.primary-btn { background: var(--color-primary); color: var(--color-text-inverse); padding: 0.85rem 1.2rem; }
.primary-btn:hover, .primary-btn:focus-visible { background: var(--color-primary-hover); }
.ghost-btn, .icon-btn { background: transparent; color: var(--color-text); border-color: oklch(from var(--color-text) l c h / 0.14); padding: 0.75rem 1rem; }
.icon-btn { width: 44px; padding: 0; display: grid; place-items: center; }
.list-block { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.list-item h3 { margin: 0 0 var(--space-2); font-size: var(--text-base); }
.result-panel { min-height: 150px; margin-top: var(--space-4); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.85rem 0.65rem; border-bottom: 1px solid var(--color-divider); font-size: var(--text-sm); }
.roadmap ul { margin: 0; padding-left: 1rem; color: var(--color-text-muted); }
.kpi { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); margin-top: var(--space-4); }
.value { font-size: var(--text-lg); color: var(--color-text); }
.tag { display: inline-flex; align-items: center; gap: var(--space-2); border-radius: 999px; background: var(--color-primary-highlight); color: var(--color-text); padding: 0.3rem 0.65rem; font-size: var(--text-xs); }
@media (max-width: 900px) {
  .two-col, .hero-card, .hero-metrics, .input-grid, .site-header { grid-template-columns: 1fr; display: grid; }
  .site-header { align-items: start; }
  h2 { max-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
.notice { margin-top: var(--space-4); padding: var(--space-4); border-radius: var(--radius-lg); background: oklch(from var(--color-primary) l c h / 0.07); border: 1px solid oklch(from var(--color-primary) l c h / 0.16); color: var(--color-text); }
.file-label { display: inline-flex; align-items: center; justify-content: center; }
.header-actions { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; }