/* Expert Vending — design tokens */
:root {
  --graphite: #1B1E21;
  --paper: #EDEAE4;
  --steel: #4C5760;
  --amber: #E8A33D;
  --ink: #14171A;

  --font-display: 'Oswald', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --wrap: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0;
}

p { margin: 0; }

a { color: inherit; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}

.btn-primary {
  background: var(--amber);
  color: var(--graphite);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #f0af4f;
}

/* Header */
.site-header {
  background: var(--graphite);
  border-bottom: 1px solid #2c3034;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.wordmark {
  font-family: var(--font-display);
  color: var(--paper);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  opacity: 0.85;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.nav a:hover,
.nav a:focus-visible {
  opacity: 1;
  border-bottom-color: var(--amber);
}

/* Hero */
.hero {
  background: var(--graphite);
  color: var(--paper);
  padding: 64px 0 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.hero-copy h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.12;
  color: var(--paper);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.05rem;
  color: #C7C2B8;
  max-width: 46ch;
  margin-bottom: 28px;
}

/* Selection panel */
.panel {
  background: #202428;
  border: 1px solid #33383D;
  border-radius: 6px;
  padding: 20px;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.sel-btn {
  font-family: var(--font-body);
  background: #2A2F34;
  border: 1px solid #3A4046;
  border-radius: 4px;
  padding: 18px 14px;
  color: #9BA3AB;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

@media (prefers-reduced-motion: reduce) {
  .sel-btn { transition: none; }
}

.sel-btn:hover {
  border-color: #4C5760;
}

.sel-btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.sel-code {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--steel);
}

.sel-label {
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.sel-btn.is-active {
  background: #3A2E19;
  border-color: var(--amber);
  color: var(--paper);
  box-shadow: 0 0 0 1px var(--amber), 0 0 18px rgba(232, 163, 61, 0.35);
}

.sel-btn.is-active .sel-code {
  color: var(--amber);
}

.sel-btn.is-dim {
  opacity: 0.5;
}

.display-screen {
  margin-top: 16px;
  background: var(--ink);
  border: 1px solid #2c3034;
  border-radius: 4px;
  padding: 18px 20px;
  min-height: 84px;
}

.display-code {
  display: block;
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.display-text {
  color: var(--paper);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Process */
.process {
  padding: 88px 0;
}

.process h2 {
  font-size: 1.9rem;
  color: var(--ink);
  margin-bottom: 40px;
}

.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.process-item {
  border-top: 2px solid var(--steel);
  padding-top: 20px;
}

.process-num {
  display: block;
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.process-item h3 {
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 12px;
}

.process-item p {
  color: var(--steel);
  font-size: 0.98rem;
}

/* Stock variety */
.stock {
  background: var(--graphite);
  color: var(--paper);
  padding: 80px 0;
}

.stock h2 {
  font-size: 1.9rem;
  color: var(--paper);
  margin-bottom: 32px;
}

.coil-rows {
  border-top: 1px solid #33383D;
}

.coil-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid #33383D;
}

.coil-tag {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.85rem;
  width: 2.5ch;
}

.coil-name {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.stock-note {
  color: #A7ADB3;
  margin-top: 24px;
  font-size: 0.95rem;
}

/* Coverage */
.coverage {
  padding: 88px 0;
}

.coverage h2 {
  font-size: 1.9rem;
  color: var(--ink);
  margin-bottom: 20px;
}

.coverage p {
  color: var(--steel);
  font-size: 1.05rem;
  max-width: 62ch;
}

/* CTA */
.cta {
  background: var(--paper);
  border-top: 1px solid #DBD6CC;
  padding: 80px 0;
  text-align: center;
}

.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.cta h2 {
  font-size: 1.9rem;
  color: var(--ink);
}

.cta p {
  color: var(--steel);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

/* Footer */
.site-footer {
  background: var(--graphite);
  color: #A7ADB3;
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.footer-inner a {
  color: var(--amber);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .process-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .header-inner {
    flex-direction: column;
    gap: 14px;
  }

  .panel-grid {
    grid-template-columns: 1fr;
  }
}