/* Art direction: trusted financial editorial meets modern product design.
   Palette: warm-neutral surfaces with restrained teal accent for credibility and clarity.
   Typography: Cabinet Grotesk for display + Satoshi for body to balance authority with readability.
   Density: balanced, spacious, and content-forward. */

/* ── Fonts ──────────────────────────────────────────────────────────────────── */
@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@400,500,700,800&f[]=satoshi@400,500,700&display=swap');

/* ── Design tokens ──────────────────────────────────────────────────────────── */
: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);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  --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;
  --space-20: 5rem;
  --space-24: 6rem;

  --color-bg:               #f7f6f2;
  --color-surface:          #f9f8f5;
  --color-surface-2:        #fbfbf9;
  --color-surface-offset:   #f3f0ec;
  --color-surface-offset-2: #edeae5;
  --color-surface-dynamic:  #e6e4df;
  --color-divider:          #dcd9d5;
  --color-border:           #d4d1ca;
  --color-text:             #28251d;
  --color-text-muted:       #66645e;
  --color-text-faint:       #9b9892;
  --color-text-inverse:     #f9f8f4;
  --color-primary:          #01696f;
  --color-primary-hover:    #0c4e54;
  --color-primary-active:   #0f3638;
  --color-primary-highlight:#d9e7e5;

  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 8px 24px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 18px 50px oklch(0.2 0.01 80 / 0.12);

  --content-default: 1120px;
  --content-narrow:  680px;

  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

[data-theme="dark"] {
  --color-bg:               #171614;
  --color-surface:          #1c1b19;
  --color-surface-2:        #201f1d;
  --color-surface-offset:   #1d1c1a;
  --color-surface-offset-2: #22211f;
  --color-surface-dynamic:  #2d2c2a;
  --color-divider:          #262523;
  --color-border:           #393836;
  --color-text:             #e2e0db;
  --color-text-muted:       #b4b1ab;
  --color-text-faint:       #7c7a75;
  --color-text-inverse:     #171614;
  --color-primary:          #4f98a3;
  --color-primary-hover:    #67aebb;
  --color-primary-active:   #2f717b;
  --color-primary-highlight:#273638;
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 18px 50px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #171614;
    --color-surface:          #1c1b19;
    --color-surface-2:        #201f1d;
    --color-surface-offset:   #1d1c1a;
    --color-surface-offset-2: #22211f;
    --color-surface-dynamic:  #2d2c2a;
    --color-divider:          #262523;
    --color-border:           #393836;
    --color-text:             #e2e0db;
    --color-text-muted:       #b4b1ab;
    --color-text-faint:       #7c7a75;
    --color-text-inverse:     #171614;
    --color-primary:          #4f98a3;
    --color-primary-hover:    #67aebb;
    --color-primary-active:   #2f717b;
    --color-primary-highlight:#273638;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 8px 24px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 18px 50px oklch(0 0 0 / 0.4);
  }
}

/* ── Base reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, color-mix(in oklab, var(--color-primary) 10%, transparent), transparent 28%),
    linear-gradient(180deg, var(--color-bg), var(--color-surface-2));
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
p, li { text-wrap: pretty; max-width: 70ch; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.1; }
ul[role="list"] { list-style: none; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.container {
  width: min(calc(100% - 2rem), var(--content-default));
  margin-inline: auto;
}

.content-narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section-alt {
  background: color-mix(in oklab, var(--color-surface-offset) 60%, transparent);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
}

/* ── Skip link ──────────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -3rem;
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 30;
  font-size: var(--text-sm);
  font-weight: 700;
}
.skip-link:focus { top: var(--space-4); }

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: color-mix(in oklab, var(--color-bg) 78%, transparent);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 5rem;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
}
.brand-mark {
  width: 3rem;
  height: 3rem; color: var(--color-primary);
  flex: 0 0 auto;
}
.brand-text {
  display: grid;
  gap: 0.15rem;
  line-height: normal;
}
.brand-text strong {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
}
.brand-text span {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* Primary nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.main-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-interactive);
  position: relative;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-primary);
}

.main-nav a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Theme toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: inline-grid;
  place-items: center;
  border: 1px solid oklch(from var(--color-text) l c h / 0.12);
  background: var(--color-surface);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  place-items: center;
  color: var(--color-text-muted);
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition:
    transform var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid oklch(from var(--color-text) l c h / 0.14);
}
.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: oklch(from var(--color-text) l c h / 0.2);
}

.text-link {
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--transition-interactive);
}
.text-link:hover { color: var(--color-primary-hover); }

.button-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

/* ── Eyebrow / kicker ───────────────────────────────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: var(--text-xs);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

/* ── Section headings ───────────────────────────────────────────────────────── */
.section-heading {
  margin-bottom: var(--space-10);
}
.section-heading h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.04em;
  margin-bottom: var(--space-4);
}
.section-heading p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 58ch;
}

.split-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

/* ── Hero ────────────────────────────────────────────────────────────────────── */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-content .eyebrow { margin-bottom: var(--space-4); }

.hero-content h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  letter-spacing: -0.04em;
  max-width: 13ch;
  margin-bottom: var(--space-6);
}

.hero-content > p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-8);
}

.hero-features {
  display: grid;
  gap: var(--space-4);
}

.hero-feature-pill {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  box-shadow: var(--shadow-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ── Page hero (inner pages) ────────────────────────────────────────────────── */
.page-hero {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  background: color-mix(in oklab, var(--color-surface-offset) 60%, transparent);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.07);
}

.page-hero-inner {
  max-width: 720px;
}

.page-hero-inner h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.04em;
  margin-block: var(--space-4) var(--space-5);
}

.page-hero-inner p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ── Concept grid (what is crypto) ─────────────────────────────────────────── */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-10);
}

.concept-card {
  padding: var(--space-6);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.concept-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
}

.concept-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Exchange grid ──────────────────────────────────────────────────────────── */
.exchange-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.exchange-card {
  padding: var(--space-5);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: var(--space-3);
}

.exchange-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.exchange-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
}

.exchange-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.rating-badge {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Use case grid ──────────────────────────────────────────────────────────── */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.use-case-card {
  padding: var(--space-5);
  background: color-mix(in oklab, var(--color-surface-2) 90%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
}

.use-case-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
}

.use-case-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Article grid & cards ───────────────────────────────────────────────────── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.article-card {
  padding: var(--space-6);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.article-card-topline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.article-tag {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.article-card time,
.article-date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.article-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
}

.article-card h3 a {
  color: var(--color-text);
  transition: color var(--transition-interactive);
}
.article-card h3 a:hover { color: var(--color-primary); }

.article-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  flex: 1;
}

.article-card .text-link { margin-top: auto; }

/* ── Security list ──────────────────────────────────────────────────────────── */
.security-list {
  list-style: none;
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-8);
  max-width: 720px;
}

.security-list li {
  padding: var(--space-4) var(--space-5);
  background: color-mix(in oklab, var(--color-surface-2) 90%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-text);
  max-width: none;
  position: relative;
  padding-left: var(--space-10);
}

.security-list li::before {
  content: '•';
  position: absolute;
  left: var(--space-5);
  color: var(--color-primary);
  font-weight: 700;
}

/* ── Filter bar (articles page) ─────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: var(--space-4);
  align-items: flex-end;
  flex-wrap: wrap;
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-10);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field-grow { flex: 1 1 260px; }

.field-group label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.field-group input,
.field-group select {
  min-height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid oklch(from var(--color-text) l c h / 0.14);
  background: var(--color-surface-2);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.field-group input:focus,
.field-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 15%, transparent);
}

.filter-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  padding-bottom: 1px;
}

/* ── Pagination ─────────────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-12);
}

.pagination-status {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── Empty state ────────────────────────────────────────────────────────────── */
.empty-state-panel {
  padding: var(--space-12) var(--space-8);
  text-align: center;
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  margin-top: var(--space-8);
}

.empty-state-panel h1,
.empty-state-panel h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
}

.empty-state-panel p {
  color: var(--color-text-muted);
  max-width: 44ch;
  margin-inline: auto;
}

/* ── Article page ───────────────────────────────────────────────────────────── */
.article-header {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  background: color-mix(in oklab, var(--color-surface-offset) 60%, transparent);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.07);
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.article-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.04em;
  margin-bottom: var(--space-5);
}

.article-excerpt {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
}

.article-body {
  padding-block: clamp(var(--space-10), 6vw, var(--space-20));
}

.article-body p {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.article-body code {
  font-size: 0.9em;
  background: var(--color-surface-offset);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.08);
  background: var(--color-surface);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-12);
  padding-block: var(--space-12);
}

.footer-brand .brand-mark {
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 34ch;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.footer-nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-heading {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
}

.footer-nav-group a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.footer-nav-group a:hover { color: var(--color-primary); }

.footer-bottom {
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.07);
  padding-block: var(--space-5);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .concept-grid,
  .exchange-grid  { grid-template-columns: repeat(2, 1fr); }
  .use-case-grid  { grid-template-columns: repeat(2, 1fr); }
  .article-grid   { grid-template-columns: repeat(2, 1fr); }
  .footer-nav     { grid-template-columns: repeat(2, 1fr); }
  .hero-inner     { grid-template-columns: 1fr; }
  .hero-features  { display: none; }
}

@media (max-width: 768px) {
  .nav-toggle  { display: inline-grid; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.1);
    flex-direction: column;
    padding: var(--space-4) var(--space-4) var(--space-6);
    gap: var(--space-1);
    box-shadow: var(--shadow-md);
  }
  .main-nav.is-open { display: flex; }
  .main-nav a {
    padding: var(--space-3) var(--space-2);
    border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
    font-size: var(--text-base);
  }
  .main-nav a:last-child { border-bottom: none; }
  .site-header { position: relative; }

  .concept-grid,
  .exchange-grid,
  .use-case-grid,
  .article-grid   { grid-template-columns: 1fr; }

  .footer-inner   { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-nav     { grid-template-columns: repeat(2, 1fr); }

  .split-heading  { flex-direction: column; align-items: flex-start; }
  .filter-bar     { flex-direction: column; }
  .field-group    { width: 100%; }
  .filter-actions { width: 100%; }
  .filter-actions .btn { flex: 1; }

  .btn { width: 100%; justify-content: center; }
  .hero-actions, .button-row { flex-direction: column; }

  .article-header h1 { font-size: var(--text-xl); }
  .page-hero-inner h1 { font-size: var(--text-xl); }
}

@media (max-width: 480px) {
  .footer-nav { grid-template-columns: 1fr; }
  .header-inner { min-height: auto; padding-block: var(--space-4); }
}

/* ── Crypto Casino grid & cards ─────────────────────────────────────────────── */
.casino-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.casino-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  border: 1px solid oklch(from var(--color-text) l c h / 0.09);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.casino-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Logo area */
.casino-card-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  background: var(--color-surface-2);
  border: 1px solid oklch(from var(--color-text) l c h / 0.07);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  overflow: hidden;
}

.casino-card-logo img {
  max-height: 60px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
}

.casino-card-logo-placeholder {
  font-size: var(--text-xl);
  line-height: 1;
}

/* Body */
.casino-card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.casino-card-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
}

/* Crypto badge list */
.crypto-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.crypto-badge {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  line-height: 1.6;
}

/* CTA */
.casino-card-action {
  margin-top: auto;
}

.casino-card-action .btn {
  width: 100%;
  justify-content: center;
}

/* ── Responsive: casino grid ────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .casino-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .casino-grid { grid-template-columns: 1fr; }
}