/* ============================================
   slng.ai — Main Stylesheet
   Dark mode, Syne headings, Space Mono accent
   ============================================ */

:root {
  --bg: #0c0c0e;
  --bg-surface: #141418;
  --bg-card: #1a1a20;
  --bg-card-hover: #1f1f27;
  --border: rgba(255, 255, 255, 0.07);
  --border-accent: rgba(251, 191, 36, 0.3);
  --text-primary: #f0ede8;
  --text-secondary: #9b9794;
  --text-muted: #5c5a57;
  --accent: #fbbf24;
  --accent-dim: rgba(251, 191, 36, 0.12);
  --accent-glow: rgba(251, 191, 36, 0.08);
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, 0.12);
  --red: #f87171;
  --red-dim: rgba(248, 113, 113, 0.12);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --max-w: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* CONTAINER */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(12, 12, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-dot {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity 0.2s;
}

.nav-cta:hover {
  opacity: 0.75;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  padding: 180px 0 120px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(251, 191, 36, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(251, 191, 36, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 24px;
  max-width: 800px;
}

.hero-headline .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: #0c0c0e;
  background: var(--accent);
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  background: #fcd34d;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.25);
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: transparent;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}

.btn-secondary:hover {
  border-color: var(--border-accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ============================================
   SECTION LABELS
   ============================================ */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 56px;
}

/* ============================================
   EXAMPLES
   ============================================ */
.examples {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.example-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, background 0.2s;
}

.example-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.example-direction {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.example-pair {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.example-input,
.example-output {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.example-output {
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
}

.example-lang {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.example-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.example-output .example-text {
  color: var(--accent);
}

.example-arrow {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 4px 0;
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 0;
}

.step {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step-connector {
  width: 40px;
  height: 1px;
  background: var(--border);
  margin-top: 56px;
  align-self: flex-start;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================
   WAITLIST
   ============================================ */
.waitlist-section {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.waitlist-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  padding: 64px;
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.waitlist-card::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(251, 191, 36, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.waitlist-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.waitlist-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.65;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.waitlist-form {
  position: relative;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.form-input {
  flex: 1;
  min-width: 240px;
  max-width: 340px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.2s;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  border-color: var(--accent);
}

.form-btn {
  white-space: nowrap;
}

.form-message {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  min-height: 20px;
  letter-spacing: 0.02em;
}

.form-message--success {
  color: var(--green);
}

.form-message--error {
  color: var(--red);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================
   VALUE PROP STRIP
   ============================================ */
.value-strip {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, background 0.2s;
}

.value-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.value-icon {
  font-size: 1.5rem;
  margin-bottom: 16px;
  display: block;
}

.value-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.value-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================
   CODE SECTION
   ============================================ */
.code-section {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.code-block-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}

.code-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  padding: 12px 20px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
  border-right: 1px solid var(--border);
  user-select: none;
}

.code-tab:hover {
  color: var(--text-secondary);
}

.code-tab--active {
  color: var(--accent);
  background: var(--accent-dim);
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-primary);
  padding: 28px 32px;
  margin: 0;
  overflow-x: auto;
  white-space: pre;
}

.code-block--hidden {
  display: none;
}

.code-comment { color: var(--text-muted); }
.code-keyword { color: var(--accent); }
.code-string { color: var(--green); }

.code-footer {
  border-top: 1px solid var(--border);
  padding: 14px 28px;
  background: var(--bg-surface);
}

.code-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* ============================================
   PROVIDERS SECTION
   ============================================ */
.providers-section {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.providers-categories {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 32px;
}

.provider-category {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.provider-category-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-top: 6px;
  min-width: 32px;
  flex-shrink: 0;
}

.provider-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.provider-chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.provider-chip:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.provider-chip--more {
  color: var(--text-muted);
  font-style: italic;
}

.providers-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ============================================
   COMPLIANCE SECTION
   ============================================ */
.compliance-section {
  padding: 60px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.compliance-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.compliance-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  flex-shrink: 0;
}

.compliance-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.compliance-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
}

.compliance-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 480px;
}

/* ============================================
   TRANSLATE PAGE
   ============================================ */

.translate-page {
  padding-top: 100px;
  min-height: 100vh;
}

.translate-header {
  text-align: center;
  padding: 60px 0 40px;
}

.translate-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
  margin-top: 24px;
}

.translate-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Direction toggle */
.direction-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
}

.dir-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}

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

.dir-btn--active {
  background: var(--accent-dim);
  border-color: var(--border-accent);
  color: var(--accent);
}

/* Example chips */
.example-chips {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 28px;
}

.chips-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  flex-shrink: 0;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.chip:hover {
  border-color: var(--border-accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* Translator card */
.translator-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 40px;
}

.translator-panels {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  min-height: 300px;
}

/* Panels */
.panel {
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.panel--output {
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.panel-textarea {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  resize: none;
  line-height: 1.65;
  width: 100%;
}

.panel-textarea::placeholder {
  color: var(--text-muted);
}

.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  gap: 12px;
}

.panel-footer--right {
  justify-content: flex-end;
}

.char-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.translate-btn {
  padding: 10px 20px;
  font-size: 0.85rem;
}

/* Divider */
.panel-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 8px;
  gap: 8px;
}

.divider-line {
  width: 1px;
  flex: 1;
  background: var(--border);
}

.divider-arrow {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-muted);
  writing-mode: horizontal-tb;
}

/* Output states */
.panel-result {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.result-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 40px 0;
}

.result-empty-icon {
  font-size: 2rem;
  opacity: 0.4;
}

.result-empty-text {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.result-loading {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}

.loading-dots {
  display: flex;
  gap: 6px;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: dot-bounce 1.2s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
  0%, 80%, 100% { transform: scale(0.7); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.result-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  line-height: 1.7;
  flex: 1;
}

.result-source {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.result-source--stub {
  color: var(--accent);
  opacity: 0.7;
}

.result-error {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--red);
  padding: 20px 0;
}

.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.copy-btn:hover {
  border-color: var(--border-accent);
  color: var(--accent);
}

/* Quick reference dictionary strip */
.dict-strip {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 80px;
}

.dict-strip-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.dict-terms {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.dict-term {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
}

.dict-slang {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.dict-def {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hero {
    padding: 140px 0 80px;
  }

  .hero-headline {
    font-size: 2.4rem;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step-connector {
    display: none;
  }

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

  .waitlist-card {
    padding: 40px 24px;
  }

  .form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .form-input {
    max-width: 100%;
    width: 100%;
  }

  .form-btn {
    width: 100%;
    text-align: center;
  }

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

  .code-block {
    font-size: 0.75rem;
    padding: 20px 16px;
  }

  .provider-category {
    flex-direction: column;
    gap: 12px;
  }

  .compliance-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  /* Translate page — stack panels vertically on mobile */
  .translator-panels {
    grid-template-columns: 1fr;
  }

  .panel-divider {
    flex-direction: row;
    padding: 12px 24px;
    gap: 8px;
  }

  .divider-line {
    height: 1px;
    width: auto;
    flex: 1;
  }

  .panel--output {
    border-left: none;
    border-top: 1px solid var(--border);
  }

  .direction-toggle {
    flex-direction: column;
    gap: 8px;
  }

  .dir-btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-inner {
    padding: 0 16px;
  }

  .hero-headline {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   PLAYGROUND PAGE
   ========================================================================== */

.playground-page {
  padding: 80px 0 120px;
  min-height: 100vh;
}

.playground-header {
  text-align: center;
  margin-bottom: 56px;
}

.playground-title {
  font-family: 'Syne', sans-serif;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
  margin: 16px 0 16px;
}

.playground-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Two-column layout: controls + result */
.playground-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 72px;
}

/* --- Controls --- */
.playground-controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.control-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-options--row {
  flex-direction: row;
  gap: 8px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
}

.option-btn:hover {
  border-color: var(--accent);
  background: rgba(251, 191, 36, 0.04);
}

.option-btn--active {
  border-color: var(--accent);
  background: rgba(251, 191, 36, 0.08);
  color: var(--text-primary);
}

.option-btn--sm {
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 8px;
  font-size: 0.8rem;
  text-align: center;
}

.option-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.option-flag {
  font-size: 1.3rem;
}

.option-text {
  font-weight: 500;
  line-height: 1.2;
}

.option-sub {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.2;
}

.route-btn {
  width: 100%;
  justify-content: center;
  font-size: 1rem;
  padding: 14px 20px;
}

/* --- Result panel --- */
.playground-result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-idle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 300px;
}

.result-idle-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.result-idle-text {
  font-size: 0.9rem;
  line-height: 1.5;
}

.result-routing {
  text-align: center;
  color: var(--text-secondary);
}

.routing-label {
  font-size: 0.85rem;
  margin-top: 12px;
}

.result-error {
  color: #f87171;
  font-size: 0.9rem;
}

/* --- Decision result --- */
.result-decision {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.decision-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.decision-routed-badge {
  background: rgba(74, 222, 128, 0.15);
  color: #4ade80;
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.decision-summary {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

.decision-summary strong {
  color: var(--accent);
}

.decision-reason {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 14px 16px;
  background: rgba(255,255,255,0.03);
  border-left: 2px solid var(--accent);
  border-radius: 0 6px 6px 0;
}

.decision-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.85rem;
}

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

.meta-key {
  color: var(--text-secondary);
  font-weight: 500;
  min-width: 90px;
}

.meta-val {
  color: var(--text-primary);
  text-align: right;
}

.meta-val--provider {
  font-weight: 600;
  color: var(--accent);
}

.meta-val--mono {
  font-family: 'Space Mono', monospace;
  font-size: 0.78rem;
}

.meta-val--stat {
  font-family: 'Space Mono', monospace;
  font-size: 0.78rem;
  color: #4ade80;
}

.meta-val--failover {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Context chips */
.decision-context {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ctx-chip {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Code snippet */
.decision-code-wrap {
  background: #0a0a0c;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.decision-code-label {
  padding: 8px 14px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.decision-code {
  margin: 0;
  padding: 14px;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  line-height: 1.7;
  color: #a3e635;
  white-space: pre-wrap;
  word-break: break-all;
}

/* --- Routing explainer strip --- */
.routing-explainer {
  border-top: 1px solid var(--border);
  padding-top: 48px;
}

.routing-explainer-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.routing-factors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.routing-factor {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.factor-icon {
  font-size: 1.3rem;
}

.factor-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.factor-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Playground responsive --- */
@media (max-width: 900px) {
  .playground-layout {
    grid-template-columns: 1fr;
  }

  .playground-result {
    min-height: 200px;
  }

  .routing-factors {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .playground-title {
    font-size: 2rem;
  }

  .control-options--row {
    gap: 6px;
  }

  .routing-factors {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}