/* hardcore-exchange.co.uk — charcoal / amber industrial exchange */
:root,
[data-theme="light"] {
  --bg: #f2f0eb;
  --bg-elevated: #ffffff;
  --bg-alt: #e8e4db;
  --text: #1a1a1a;
  --text-muted: #4a4a4a;
  --border: #c8c2b4;
  --border-strong: #1a1a1a;
  --primary: #c47a00;
  --primary-hover: #a36600;
  --primary-text: #1a1a1a;
  --accent: #e8a020;
  --warning: #f5b800;
  --charcoal: #2a2a2a;
  --hero-grad: linear-gradient(145deg, #2a2a2a 0%, #1a1a1a 45%, #0d0d0d 100%);
  --card-edge: #1a1a1a;
  --shadow: 0 6px 0 rgba(26, 26, 26, 0.12), 0 12px 28px rgba(26, 26, 26, 0.1);
  --focus: #c47a00;
  --success: #1f6b3a;
  --radius: 2px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-display: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
  --max: 1120px;
  --header-h: 4.25rem;
  --clip-card: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

[data-theme="dark"] {
  --bg: #0d0d0d;
  --bg-elevated: #161616;
  --bg-alt: #1a1a1a;
  --text: #f0ebe3;
  --text-muted: #a89f90;
  --border: #33302a;
  --border-strong: #f5b800;
  --primary: #f5b800;
  --primary-hover: #ffcc33;
  --primary-text: #0d0d0d;
  --accent: #e8a020;
  --warning: #f5b800;
  --charcoal: #1a1a1a;
  --hero-grad: linear-gradient(145deg, #1f1c14 0%, #12100c 50%, #0a0a0a 100%);
  --card-edge: #f5b800;
  --shadow: 0 6px 0 rgba(245, 184, 0, 0.12), 0 16px 36px rgba(0, 0, 0, 0.45);
  --focus: #f5b800;
  --success: #4ade80;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 1rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--primary-hover);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  background: var(--primary);
  color: var(--primary-text);
  padding: 0.6rem 1.1rem;
  z-index: 1000;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
}

.skip-link:focus {
  left: 0.5rem;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-elevated) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 3px solid var(--border-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
  flex-wrap: wrap;
}

.logo {
  font-weight: 800;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
}

.logo span {
  color: var(--primary);
}

.logo-mark {
  display: inline-block;
  width: 0.65rem;
  height: 0.65rem;
  background: var(--primary);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  margin-right: 0.15rem;
  vertical-align: middle;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.theme-toggle,
.nav-toggle {
  font: inherit;
  cursor: pointer;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  padding: 0.4rem 0.75rem;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
}

.theme-toggle:hover,
.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.nav-toggle {
  font-size: 1.15rem;
  line-height: 1;
  padding: 0.35rem 0.65rem;
}

.nav-wrap {
  width: 100%;
  display: none;
}

.nav-wrap.is-open {
  display: block;
}

.site-nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem 0 1rem;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.85rem;
  padding: 0.65rem 0.75rem;
  border-left: 3px solid transparent;
}

.site-nav a:hover {
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  border-left-color: var(--primary);
}

.site-nav a[aria-current="page"] {
  color: var(--primary);
  border-left-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

@media (min-width: 800px) {
  .header-inner {
    flex-wrap: nowrap;
  }

  .nav-toggle {
    display: none;
  }

  .header-actions {
    order: 3;
    margin-left: 0;
  }

  .nav-wrap {
    display: block !important;
    width: auto;
    order: 2;
    flex: 1;
  }

  .site-nav {
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
    gap: 0.15rem;
    padding: 0;
  }

  .site-nav a {
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 0.5rem 0.7rem;
  }

  .site-nav a:hover,
  .site-nav a[aria-current="page"] {
    border-left-color: transparent;
    border-bottom-color: var(--primary);
    background: transparent;
  }
}

/* Main */
main {
  flex: 1;
}

/* Hero */
.hero {
  background: var(--hero-grad);
  color: #f0ebe3;
  padding: 3.5rem 0 4rem;
  border-bottom: 4px solid var(--warning);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 12px,
      rgba(245, 184, 0, 0.03) 12px,
      rgba(245, 184, 0, 0.03) 13px
    );
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 18ch;
}

.hero .lead {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: #c8bfb0;
  max-width: 42ch;
  margin: 0 0 1.75rem;
  line-height: 1.55;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--warning);
  border: 2px solid var(--warning);
  padding: 0.3rem 0.65rem;
  margin: 0 0 1.1rem;
  background: rgba(245, 184, 0, 0.08);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.chip {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(245, 184, 0, 0.45);
  color: #e8dcc8;
  background: rgba(0, 0, 0, 0.25);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font: inherit;
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 0.85rem 1.4rem;
  border: 3px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-text);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--primary-text);
}

.btn-ghost {
  background: transparent;
  color: #f0ebe3;
  border-color: rgba(245, 184, 0, 0.7);
}

.btn-ghost:hover {
  background: rgba(245, 184, 0, 0.12);
  color: var(--warning);
  border-color: var(--warning);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border-color: var(--primary);
  color: var(--primary);
}

.hero .btn-primary {
  background: var(--warning);
  border-color: var(--warning);
  color: #0d0d0d;
}

.hero .btn-primary:hover {
  background: #ffcc33;
  border-color: #ffcc33;
  color: #0d0d0d;
}

/* Sections */
.section {
  padding: 3.25rem 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.section-intro {
  color: var(--text-muted);
  max-width: 58ch;
  margin: 0 0 2rem;
  font-size: 1.05rem;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-header .section-intro {
  margin-bottom: 0;
}

/* Grids & cards */
.grid-2 {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.grid-4 {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 800px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-left: 4px solid var(--card-edge);
  padding: 1.4rem 1.35rem 1.5rem;
  box-shadow: var(--shadow);
  clip-path: var(--clip-card);
  position: relative;
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  height: 2.4rem;
  padding: 0 0.45rem;
  background: color-mix(in srgb, var(--primary) 15%, transparent);
  color: var(--primary);
  font-weight: 900;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.9rem;
  border: 2px solid color-mix(in srgb, var(--primary) 45%, transparent);
  font-family: var(--mono);
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  height: 100%;
  transition: border-color 0.12s ease, transform 0.12s ease;
}

.card-link:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  color: inherit;
}

.card-link:hover h3 {
  color: var(--primary);
}

.card-meta {
  display: block;
  margin-top: 0.85rem;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
}

/* Steps */
.steps {
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}

.step {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  padding: 1.4rem 1.35rem 1.5rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: auto 1fr;
  align-items: start;
  box-shadow: var(--shadow);
}

.step-num {
  counter-increment: step;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--primary);
  color: var(--primary-text);
  font-weight: 900;
  font-size: 1.1rem;
  font-family: var(--mono);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.step p {
  margin: 0;
  color: var(--text-muted);
}

.step-body {
  min-width: 0;
}

@media (min-width: 720px) {
  .steps-horizontal {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Stats strip */
.stats {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 2rem;
}

.stat {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-top: 4px solid var(--primary);
  padding: 1.15rem 1.25rem;
  text-align: left;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--primary);
  font-family: var(--mono);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
}

@media (min-width: 560px) {
  .stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Page header (inner pages) */
.page-header {
  padding: 2.5rem 0 2rem;
  border-bottom: 3px solid var(--border-strong);
  background: var(--bg-alt);
}

.page-header h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-header p {
  margin: 0;
  color: var(--text-muted);
  max-width: 55ch;
  font-size: 1.05rem;
}

/* CTA band */
.cta-band {
  background: var(--hero-grad);
  color: #f0ebe3;
  padding: 3rem 0;
  border-top: 4px solid var(--warning);
  border-bottom: 4px solid var(--warning);
}

.cta-band h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 900;
  text-transform: uppercase;
  color: #f0ebe3;
}

.cta-band p {
  margin: 0 0 1.5rem;
  color: #c8bfb0;
  max-width: 48ch;
}

.cta-band .btn-primary {
  background: var(--warning);
  border-color: var(--warning);
  color: #0d0d0d;
}

.cta-band .btn-primary:hover {
  background: #ffcc33;
  border-color: #ffcc33;
  color: #0d0d0d;
}

/* Lists */
.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.65rem;
  height: 0.65rem;
  background: var(--primary);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

/* Form */
.form-panel {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-top: 4px solid var(--primary);
  padding: 1.75rem 1.5rem 2rem;
  box-shadow: var(--shadow);
  max-width: 36rem;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.form-group .hint {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  margin-top: 0.3rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: var(--radius);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 25%, transparent);
}

.form-group textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-row {
  display: grid;
  gap: 1rem;
}

@media (min-width: 520px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.5rem;
}

.form-success {
  display: none;
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  border: 2px solid var(--success);
  background: color-mix(in srgb, var(--success) 12%, transparent);
  color: var(--text);
  font-weight: 600;
}

.form-success.is-visible {
  display: block;
}

.form-note {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

/* Privacy content */
.prose {
  max-width: 65ch;
}

.prose h2 {
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 2rem 0 0.65rem;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p,
.prose li {
  color: var(--text-muted);
}

.prose ul {
  padding-left: 1.25rem;
}

.prose a {
  font-weight: 600;
}

/* Split layout */
.split {
  display: grid;
  gap: 2rem;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1fr 1.1fr;
    align-items: start;
  }

  .split-reverse {
    grid-template-columns: 1.1fr 1fr;
  }
}

/* Market category detail */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.9rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg);
}

/* Table-like rules */
.rules {
  display: grid;
  gap: 0;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
}

.rule-row {
  display: grid;
  gap: 0.35rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.rule-row:last-child {
  border-bottom: none;
}

.rule-row strong {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.rule-row span {
  color: var(--text-muted);
  font-size: 0.95rem;
}

@media (min-width: 640px) {
  .rule-row {
    grid-template-columns: 12rem 1fr;
    gap: 1.25rem;
    align-items: baseline;
  }
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: #0a0a0a;
  color: #c8bfb0;
  border-top: 4px solid var(--warning);
  padding: 2.25rem 0 1.75rem;
}

.footer-inner {
  display: grid;
  gap: 1.5rem;
}

.footer-brand {
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #f0ebe3;
  font-size: 0.95rem;
  text-decoration: none;
}

.footer-brand:hover {
  color: var(--warning);
}

.footer-brand span {
  color: var(--warning);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-nav a {
  color: #c8bfb0;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-nav a:hover {
  color: var(--warning);
}

.footer-meta {
  font-size: 0.85rem;
  color: #8a8275;
  margin: 0;
  line-height: 1.6;
}

.footer-meta a {
  color: #c8bfb0;
}

.footer-meta a:hover {
  color: var(--warning);
}

@media (min-width: 700px) {
  .footer-inner {
    grid-template-columns: 1fr auto;
    align-items: start;
  }

  .footer-meta {
    grid-column: 1 / -1;
  }
}

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

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}