/* ==========================================================================
   BIDFLOW DESIGN SYSTEM
   Top 1% Enterprise SaaS. Clean, airy, sophisticated.
   Extracted from demo/index.html + demo/article.html
   ========================================================================== */

:root {
  --bg-base: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-dark: #05080F;
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;
  --border-dark: #1E293B;
  --accent-primary: #E05D36;
  --accent-hover: #C24A26;
  --accent-subtle: #FFF1EC;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --shadow-subtle: 0 4px 12px -2px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 12px 32px -8px rgba(15, 23, 42, 0.1);
  --transition-base: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { overflow-x: clip; }

/* Base Typography */
body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

/* Fixed header offset — keeps content below the glassmorphism header */
body { padding-top: 56px; }
@media (max-width: 768px) { body { padding-top: 52px; } }

a { color: inherit; text-decoration: none; transition: color 0.2s ease, border-color 0.2s ease; }
h1, h2, h3, h4 { font-family: var(--font-display); }
p { color: var(--text-muted); line-height: 1.7; }

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

/* Section Patterns */
.section-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 16px;
  margin-bottom: 24px;
  background: var(--bg-base);
  color: var(--text-muted);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.02);
}

.section-header { text-align: center; margin-bottom: 64px; }
.section-header h2 { font-size: clamp(2.25rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 20px; }
.section-header p { font-size: 1.15rem; max-width: 600px; margin: 0 auto; color: var(--text-muted); }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--accent-primary);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.15), 0 2px 4px rgba(224, 93, 54, 0.2);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.15), 0 4px 12px rgba(224, 93, 54, 0.3);
  transform: translateY(-1px);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  text-decoration: none;
}
.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border: 1px solid var(--border-light);
  background: var(--bg-base);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-subtle);
}
.btn-outline:hover { border-color: var(--text-main); background: var(--bg-subtle); }

.btn-block { width: 100%; justify-content: center; padding: 16px; margin-top: 8px; font-size: 1rem; }

/* Utility */
.section-cta { text-align: center; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }