:root {
  --tb-primary:       #F59E0B;
  --tb-primary-dark:  #D97706;
  --tb-primary-light: #FFFBEB;
  --tb-dark:          #111827;
  --tb-text:          #374151;
  --tb-muted:         #6B7280;
  --tb-border:        #E5E7EB;
  --tb-bg:            #F9FAFB;
  --tb-white:         #FFFFFF;
  --tb-radius:        8px;
  --tb-radius-lg:     12px;
  --tb-shadow:        0 1px 3px rgba(0,0,0,0.1);
  --tb-shadow-lg:     0 10px 40px rgba(0,0,0,0.1);
  --tb-max-width:     1200px;
  --tb-font:          'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  font-family: var(--tb-font);
  color: var(--tb-text);
  background: var(--tb-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--tb-radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 150ms ease;
  border: none;
  white-space: nowrap;
}
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.btn-primary { background: var(--tb-primary); color: var(--tb-dark); }
.btn-primary:hover { background: var(--tb-primary-dark); }

.btn-outline { background: transparent; color: var(--tb-text); border: 1px solid var(--tb-border); }
.btn-outline:hover { background: var(--tb-bg); }

.btn-dark { background: var(--tb-dark); color: var(--tb-white); }
.btn-dark:hover { background: #1F2937; }

.btn-ghost { background: transparent; color: var(--tb-muted); }
.btn-ghost:hover { color: var(--tb-text); background: var(--tb-bg); }

/* ── Badge ───────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--tb-primary-light);
  color: var(--tb-primary-dark);
  border: 1px solid #FDE68A;
}
.badge-dark {
  background: #1F2937;
  color: #D1D5DB;
  border-color: #374151;
}

/* ── Typography ──────────────────────────── */
section { padding: 80px 0; }

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; line-height: 1.15; color: var(--tb-dark); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; line-height: 1.25; color: var(--tb-dark); }
h3 { font-size: 1.125rem; font-weight: 600; color: var(--tb-dark); }
h4 { font-size: 1rem; font-weight: 600; color: var(--tb-dark); }

p { color: var(--tb-muted); line-height: 1.7; }

a { color: inherit; }

/* ── Cards ───────────────────────────────── */
.card {
  background: var(--tb-white);
  border: 1px solid var(--tb-border);
  border-radius: var(--tb-radius-lg);
  padding: 24px;
  transition: box-shadow 200ms ease, transform 200ms ease;
}
.card:hover { box-shadow: var(--tb-shadow-lg); transform: translateY(-2px); }

/* ── Grid helpers ────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ── Section header ─────────────────────── */
.section-header { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-header p { margin-top: 12px; font-size: 1.05rem; }

/* ── Divider ─────────────────────────────── */
hr { border: none; border-top: 1px solid var(--tb-border); }

/* ── Form elements ───────────────────────── */
label { display: block; font-size: 14px; font-weight: 500; color: var(--tb-text); margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--tb-border);
  border-radius: var(--tb-radius);
  font-size: 14px;
  font-family: var(--tb-font);
  color: var(--tb-text);
  background: var(--tb-white);
  transition: border-color 150ms ease;
  outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--tb-primary); box-shadow: 0 0 0 3px rgba(245,158,11,0.15); }
textarea { resize: vertical; min-height: 120px; }

.form-group { margin-bottom: 20px; }

/* ── Prose ───────────────────────────────── */
.prose h2 { margin-top: 2rem; margin-bottom: 0.75rem; }
.prose h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; }
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.35rem; color: var(--tb-text); }
.prose code {
  background: var(--tb-bg);
  border: 1px solid var(--tb-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.875em;
  font-family: 'Fira Code', 'Cascadia Code', monospace;
}
.prose pre {
  background: var(--tb-dark);
  color: #E5E7EB;
  border-radius: var(--tb-radius);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 1rem;
}
.prose pre code { background: none; border: none; padding: 0; font-size: 0.875rem; color: inherit; }
.prose a { color: var(--tb-primary-dark); text-decoration: underline; }
.prose blockquote {
  border-left: 3px solid var(--tb-primary);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--tb-muted);
  font-style: italic;
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 768px) {
  section { padding: 56px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}

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