: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, 2.2rem);
  --space-1: .25rem; --space-2: .5rem; --space-3: .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-surface-offset: #edeae5;
  --color-border: #d4d1ca;
  --color-divider: #dcd9d5;
  --color-text: #28251d;
  --color-text-muted: #6f6c65;
  --color-primary: #01696f;
  --color-primary-hover: #0c4e54;
  --color-primary-soft: #d8ebea;
  --color-success: #437a22;
  --radius-md: .85rem;
  --radius-lg: 1.2rem;
  --radius-xl: 1.6rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgb(30 30 30 / .06);
  --shadow-md: 0 10px 32px rgb(30 30 30 / .08);
  --shadow-lg: 0 24px 60px rgb(30 30 30 / .12);
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --color-bg: #171614;
  --color-surface: #1c1b19;
  --color-surface-2: #201f1d;
  --color-surface-offset: #252320;
  --color-border: #393836;
  --color-divider: #2a2927;
  --color-text: #ece8df;
  --color-text-muted: #b4aea3;
  --color-primary: #4f98a3;
  --color-primary-hover: #72aeb7;
  --color-primary-soft: #243336;
  --shadow-sm: 0 1px 2px rgb(0 0 0 / .28);
  --shadow-md: 0 10px 30px rgb(0 0 0 / .34);
  --shadow-lg: 0 24px 60px rgb(0 0 0 / .4);
}

* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent 28%),
    radial-gradient(circle at left bottom, color-mix(in srgb, var(--color-primary) 6%, transparent), transparent 25%),
    var(--color-bg);
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; }
table { width: 100%; border-collapse: collapse; }
code { font-size: .92em; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

.skip-link {
  position: absolute; left: 1rem; top: -100px; background: var(--color-primary); color: white; padding: .75rem 1rem; border-radius: var(--radius-md); z-index: 100;
}
.skip-link:focus { top: 1rem; }

.page-shell {
  width: min(1440px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 1.5rem;
}

.sidebar,
.panel {
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

.sidebar {
  position: sticky;
  top: 1rem;
  height: fit-content;
  padding: 1.25rem;
  display: grid;
  gap: 1.5rem;
}

.brand-row,
.brand-wrap,
.section-head,
.hero-header,
.button-row,
.checkbox-row {
  display: flex;
  gap: .75rem;
}

.brand-row,
.section-head,
.hero-header {
  justify-content: space-between;
  align-items: flex-start;
}

.brand-wrap { align-items: center; }
.brand-logo { width: 44px; height: 44px; color: var(--color-primary); }
.brand-wrap h1 { font-size: var(--text-lg); line-height: 1.1; }
.brand-wrap p { font-size: var(--text-xs); color: var(--color-text-muted); }

.theme-toggle,
.menu-toggle,
.swap-btn {
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
  transition: transform var(--transition), background var(--transition);
}
.theme-toggle:hover,
.menu-toggle:hover,
.swap-btn:hover { transform: translateY(-1px); background: var(--color-primary-soft); }
.menu-toggle { display: none; }

.side-nav,
.info-list,
.side-stack { display: grid; gap: .75rem; }
.side-nav a {
  padding: .85rem 1rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.side-nav a.active,
.side-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
  border-color: color-mix(in srgb, var(--color-text) 10%, transparent);
}

.side-card,
.info-item,
.result-card,
.stat-card {
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
  border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
}
.side-card h2,
.info-item strong { font-size: var(--text-sm); }
.side-card p,
.info-item p,
.info-item code,
.stat-card span,
.result-card span,
.result-card small { color: var(--color-text-muted); }

.main-content,
.content-grid,
.filter-grid,
.converter-grid,
.hero-stats { display: grid; gap: 1.5rem; }
.main-content { min-width: 0; }
.hero-panel,
.table-panel,
.panel { padding: 1.5rem; }

.hero-panel h2 { font-size: var(--text-xl); line-height: 1.06; max-width: 14ch; margin-top: 1rem; }
.hero-panel p { max-width: 64ch; color: var(--color-text-muted); margin-top: 1rem; }
.eyebrow {
  display: inline-flex; align-items: center; padding: .35rem .75rem; border-radius: var(--radius-full); background: var(--color-primary-soft); color: var(--color-primary);
  font-size: var(--text-xs); font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
.hero-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat-card span { display: block; font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .08em; }
.stat-card strong { display: block; margin-top: .35rem; font-size: var(--text-lg); font-variant-numeric: tabular-nums; }

.content-grid { grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); }
.section-head h3 { font-size: var(--text-lg); }
.section-head p { color: var(--color-text-muted); font-size: var(--text-sm); }
.section-head.single { margin-bottom: 1rem; }

.filter-grid { grid-template-columns: 1.4fr .9fr .9fr .8fr; margin-bottom: 1.25rem; }
.field { display: grid; gap: .45rem; }
.field span { font-size: var(--text-xs); font-weight: 700; letter-spacing: .04em; color: var(--color-text-muted); }
.field input,
.field select {
  width: 100%; min-height: 48px; padding: .85rem 1rem; border-radius: var(--radius-md); background: var(--color-surface-2);
  border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
}
.checkbox-field .checkbox-row {
  min-height: 48px;
  align-items: center;
  padding: 0 1rem;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
}

.primary-btn,
.ghost-btn {
  min-height: 48px;
  padding: .85rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 700;
}
.primary-btn { background: var(--color-primary); color: white; }
.primary-btn:hover { background: var(--color-primary-hover); }
.ghost-btn { background: var(--color-surface-2); border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent); }

.table-wrap {
  overflow: auto;
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
  background: var(--color-surface-2);
}
th, td {
  text-align: left;
  padding: .95rem 1rem;
  border-bottom: 1px solid var(--color-divider);
  font-variant-numeric: tabular-nums;
}
th {
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--color-surface-2) 92%, var(--color-bg));
  z-index: 1;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-muted);
}
tbody tr:hover { background: color-mix(in srgb, var(--color-primary) 4%, var(--color-surface-2)); }

.currency-cell { display: grid; gap: .15rem; }
.currency-cell strong { font-size: var(--text-sm); }
.currency-cell small { color: var(--color-text-muted); }
.iso-badge {
  display: inline-flex; align-items: center; justify-content: center; padding: .3rem .65rem; border-radius: var(--radius-full);
  background: var(--color-primary-soft); color: var(--color-primary); font-size: var(--text-xs); font-weight: 700;
}

.converter-grid { grid-template-columns: 1fr 1fr auto 1fr 1fr; align-items: end; }
.result-card {
  margin-top: 1.25rem;
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 10%, var(--color-surface-2)), var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 18%, transparent);
}
.result-card strong { display: block; margin: .35rem 0; font-size: var(--text-lg); font-variant-numeric: tabular-nums; }

@media (max-width: 1180px) {
  .page-shell,
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 860px) {
  .hero-stats,
  .filter-grid,
  .converter-grid { grid-template-columns: 1fr; }
  .button-row { width: 100%; flex-wrap: wrap; }
  .table-wrap table { min-width: 760px; }
}

@media (max-width: 760px) {
  .page-shell { width: min(100% - 1rem, 1440px); padding-top: 1rem; }
  .sidebar { display: none; position: fixed; inset: 1rem; z-index: 90; overflow: auto; }
  .sidebar.open { display: grid; }
  .menu-toggle { display: inline-flex; }
  .hero-panel,
  .table-panel,
  .panel { padding: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}