/* ============================================================
   BizCol — Public Website Design System
   bizcol.uk
   ============================================================ */

:root {
  --c-primary:       #1D4ED8;
  --c-primary-d:     #1E40AF;
  --c-primary-l:     #3B82F6;
  --c-primary-bg:    #EFF6FF;
  --c-ai:            #0891B2;   /* cyan for AI highlights */
  --c-ai-bg:         #ECFEFF;

  --c-dark:          #0F172A;
  --c-dark-2:        #1E293B;
  --c-surface:       #F8FAFC;
  --c-surface-2:     #F1F5F9;
  --c-white:         #FFFFFF;

  --c-text:          #1E293B;
  --c-muted:         #64748B;
  --c-light:         #94A3B8;

  --c-border:        #E2E8F0;
  --c-border-d:      #CBD5E1;

  --r:               0.5rem;
  --r-lg:            1rem;
  --r-xl:            1.5rem;
  --shadow:          0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:       0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:       0 10px 15px rgba(0,0,0,.07), 0 4px 6px rgba(0,0,0,.04);
  --shadow-xl:       0 20px 25px rgba(0,0,0,.08), 0 8px 10px rgba(0,0,0,.04);

  --font:            'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --w:               1280px;
  --nav-h:           68px;
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--c-text); background: var(--c-white); line-height: 1.65; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ─── Layout ─────────────────────────────────────────────── */
.container { width: 100%; max-width: var(--w); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }
.section-lg { padding: 7rem 0; }

/* ─── Typography ─────────────────────────────────────────── */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; color: var(--c-dark); letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
p { color: var(--c-muted); line-height: 1.75; }
.text-center { text-align: center; }
.lead { font-size: 1.125rem; color: var(--c-muted); line-height: 1.75; }
.overline { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-primary); }
.display { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }

/* ─── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.65rem 1.5rem; border-radius: var(--r); font-size: 0.9375rem; font-weight: 600;
  transition: all 0.15s ease; white-space: nowrap; cursor: pointer;
}
.btn-primary {
  background: var(--c-primary); color: var(--c-white);
  box-shadow: 0 1px 2px rgba(29,78,216,.3);
}
.btn-primary:hover { background: var(--c-primary-d); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(29,78,216,.35); }
.btn-outline {
  background: transparent; color: var(--c-primary); border: 1.5px solid var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary-bg); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--c-text); }
.btn-ghost:hover { color: var(--c-primary); }
.btn-dark { background: var(--c-dark); color: var(--c-white); }
.btn-dark:hover { background: var(--c-dark-2); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-white { background: var(--c-white); color: var(--c-primary); font-weight: 700; }
.btn-white:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.875rem; }

/* ─── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600;
}
.badge-blue { background: var(--c-primary-bg); color: var(--c-primary); }
.badge-ai   { background: var(--c-ai-bg); color: var(--c-ai); }
.badge-soon { background: #F0FDF4; color: #16A34A; }
.badge-dark { background: rgba(255,255,255,.12); color: rgba(255,255,255,.9); }

/* ─── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h); background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--c-border);
  transition: box-shadow 0.2s ease;
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  display: flex; align-items: center; gap: 2rem;
  height: 100%; max-width: var(--w); margin: 0 auto; padding: 0 1.5rem;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.5rem; font-weight: 800;
  font-size: 1.375rem; color: var(--c-dark); letter-spacing: -0.03em; flex-shrink: 0;
}
.nav-logo .logo-dot { color: var(--c-primary); }
.nav-links {
  display: flex; align-items: center; gap: 0.25rem; flex: 1;
}
.nav-links a {
  padding: 0.4rem 0.75rem; border-radius: var(--r); font-size: 0.875rem; font-weight: 500;
  color: var(--c-muted); transition: all 0.15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--c-text); background: var(--c-surface); }
.nav-actions { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }
.nav-actions .btn { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: var(--r); color: var(--c-text); margin-left: auto; }
  .nav-actions .btn-ghost { display: none; }
  .nav-mobile {
    display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: var(--c-white); padding: 1.5rem; z-index: 99; overflow-y: auto;
    border-top: 1px solid var(--c-border); flex-direction: column; gap: 0.5rem;
  }
  .nav-mobile.open { display: flex; }
  .nav-mobile a {
    display: block; padding: 0.75rem 1rem; border-radius: var(--r);
    font-size: 1rem; font-weight: 500; color: var(--c-text);
  }
  .nav-mobile a:hover { background: var(--c-surface); color: var(--c-primary); }
  .nav-mobile .divider { border-top: 1px solid var(--c-border); margin: 0.75rem 0; }
  .nav-mobile .btn { width: 100%; justify-content: center; margin-top: 0.5rem; }
}

/* ─── Hero ───────────────────────────────────────────────── */
.hero-dark {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 60%, #0F172A 100%);
  color: var(--c-white); padding-top: calc(var(--nav-h) + 5rem); padding-bottom: 6rem;
  position: relative; overflow: hidden;
}
.hero-dark::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 60% 40%, rgba(59,130,246,.2) 0%, transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(8,145,178,.15) 0%, transparent 50%);
  pointer-events: none;
}
.hero-dark h1 { color: var(--c-white); }
.hero-dark .lead { color: rgba(255,255,255,.7); }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.875rem; margin-top: 2rem; }
.hero-visual {
  border-radius: var(--r-xl); overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,.5); border: 1px solid rgba(255,255,255,.1);
  background: rgba(255,255,255,.05);
}
.page-top { padding-top: var(--nav-h); }

/* ─── Section headers ────────────────────────────────────── */
.section-header { margin-bottom: 3rem; }
.section-header.center { text-align: center; }
.section-header .overline { margin-bottom: 0.75rem; }
.section-header h2 { margin-bottom: 0.875rem; }
.section-header .lead { max-width: 640px; }
.section-header.center .lead { margin: 0 auto; }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--c-white); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 1.75rem;
  transition: all 0.2s ease; box-shadow: var(--shadow);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); border-color: var(--c-border-d); }
.card-icon {
  width: 48px; height: 48px; border-radius: var(--r); margin-bottom: 1rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-primary-bg); color: var(--c-primary); font-size: 1.5rem;
}
.card-icon.ai { background: var(--c-ai-bg); color: var(--c-ai); }
.card h3 { margin-bottom: 0.5rem; font-size: 1.0625rem; }
.card p { font-size: 0.9375rem; }
.card-soon .card-icon { background: #F0FDF4; color: #16A34A; }

/* ─── Grid layouts ───────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}

/* ─── Stats band ─────────────────────────────────────────── */
.stats-band { background: var(--c-surface); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.stats-inner { display: flex; justify-content: center; gap: 4rem; padding: 2.5rem 0; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-value { font-size: 2.25rem; font-weight: 800; color: var(--c-primary); letter-spacing: -0.04em; }
.stat-label { font-size: 0.875rem; color: var(--c-muted); margin-top: 0.25rem; }

/* ─── Steps ──────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.step { display: flex; flex-direction: column; align-items: center; text-align: center; }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--c-primary); color: white; font-weight: 800; font-size: 1.125rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 1rem;
}
.step-icon {
  width: 64px; height: 64px; border-radius: var(--r-lg);
  background: var(--c-primary-bg); color: var(--c-primary); font-size: 2rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 1rem;
}
@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; gap: 2rem; }
  .step { align-items: flex-start; text-align: left; flex-direction: row; gap: 1rem; }
  .step-icon { flex-shrink: 0; width: 48px; height: 48px; }
}

/* ─── Feature list ───────────────────────────────────────── */
.feature-list { display: flex; flex-direction: column; gap: 1.5rem; }
.feature-item { display: flex; gap: 1rem; align-items: flex-start; }
.feature-icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: var(--r);
  background: var(--c-primary-bg); color: var(--c-primary); font-size: 1.25rem;
  display: flex; align-items: center; justify-content: center;
}
.feature-icon.ai { background: var(--c-ai-bg); color: var(--c-ai); }

/* ─── Pricing table ──────────────────────────────────────── */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.pricing-card {
  border: 1px solid var(--c-border); border-radius: var(--r-xl); padding: 2rem;
  background: var(--c-white); position: relative;
}
.pricing-card.featured {
  border-color: var(--c-primary); border-width: 2px;
  background: var(--c-primary); color: var(--c-white);
}
.pricing-card.featured h3, .pricing-card.featured .price, .pricing-card.featured p { color: white; }
.pricing-card.featured .check { color: rgba(255,255,255,.7); }
.price { font-size: 2.5rem; font-weight: 800; color: var(--c-dark); letter-spacing: -0.04em; }
.price span { font-size: 1rem; font-weight: 400; color: var(--c-muted); }
.price-features { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.check { color: var(--c-primary); font-size: 0.9375rem; display: flex; align-items: flex-start; gap: 0.5rem; }
.check::before { content: '✓'; flex-shrink: 0; }
@media (max-width: 900px) { .pricing-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; } }

/* ─── FAQ accordion ──────────────────────────────────────── */
.faq-list { display: flex; flex-direction: column; gap: 0; }
.faq-item { border-bottom: 1px solid var(--c-border); }
.faq-q {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
  padding: 1.25rem 0; font-weight: 600; font-size: 1rem; color: var(--c-text);
  text-align: left; gap: 1rem;
}
.faq-q:hover { color: var(--c-primary); }
.faq-icon { flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--c-surface); display: flex; align-items: center; justify-content: center; font-size: 0.875rem; transition: transform 0.2s ease; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { display: none; padding: 0 0 1.25rem; color: var(--c-muted); font-size: 0.9375rem; line-height: 1.75; }
.faq-item.open .faq-a { display: block; }

/* ─── CTA sections ───────────────────────────────────────── */
.cta-dark {
  background: var(--c-dark); color: white;
  padding: 5rem 0; text-align: center;
}
.cta-dark h2 { color: white; margin-bottom: 1rem; }
.cta-dark .lead { color: rgba(255,255,255,.65); max-width: 600px; margin: 0 auto 2rem; }
.cta-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.cta-blue {
  background: var(--c-primary); color: white;
  padding: 5rem 0; text-align: center;
}
.cta-blue h2 { color: white; }
.cta-blue .lead { color: rgba(255,255,255,.75); max-width: 600px; margin: 0 auto 2rem; }

/* ─── Testimonials ───────────────────────────────────────── */
.testimonial {
  background: var(--c-white); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 2rem; box-shadow: var(--shadow);
}
.testimonial-q { font-size: 1rem; color: var(--c-text); line-height: 1.7; margin-bottom: 1.25rem; }
.testimonial-q::before { content: '"'; color: var(--c-primary); font-size: 1.5rem; line-height: 0; vertical-align: -0.4rem; margin-right: 0.1rem; }
.testimonial-q::after { content: '"'; color: var(--c-primary); }
.testimonial-author { font-weight: 600; font-size: 0.9375rem; color: var(--c-dark); }
.testimonial-role { font-size: 0.875rem; color: var(--c-muted); }

/* ─── App download section ───────────────────────────────── */
.app-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
  color: white; border-radius: var(--r-xl); padding: 4rem;
  display: flex; gap: 4rem; align-items: center;
}
.app-store-badges { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.app-badge {
  display: inline-flex; align-items: center; gap: 0.75rem;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-lg); padding: 0.75rem 1.25rem;
  color: white; font-size: 0.875rem; font-weight: 600;
  transition: all 0.2s ease;
}
.app-badge:hover { background: rgba(255,255,255,.18); }
.app-badge .icon { font-size: 1.5rem; }
@media (max-width: 768px) {
  .app-section { flex-direction: column; padding: 2.5rem; gap: 2rem; }
}

/* ─── Tables (legal pages) ───────────────────────────────── */
.legal-content { max-width: 820px; margin: 0 auto; padding: 4rem 0; }
.legal-content h2 { font-size: 1.375rem; margin: 2.5rem 0 0.75rem; color: var(--c-dark); }
.legal-content h3 { font-size: 1.125rem; margin: 1.75rem 0 0.5rem; }
.legal-content p { margin-bottom: 1rem; }
.legal-content ul, .legal-content ol { margin: 1rem 0 1rem 1.5rem; }
.legal-content li { margin-bottom: 0.5rem; }
.legal-content ul { list-style: disc; }
.legal-content ol { list-style: decimal; }
.legal-content a { color: var(--c-primary); text-decoration: underline; }
.legal-header { background: var(--c-surface); border-bottom: 1px solid var(--c-border); padding: 4rem 0 3rem; padding-top: calc(var(--nav-h) + 3rem); }
.legal-header h1 { font-size: 2.25rem; margin-bottom: 0.5rem; }
.legal-header .meta { font-size: 0.875rem; color: var(--c-muted); }
.notice {
  background: #FFFBEB; border: 1px solid #FDE68A; border-radius: var(--r);
  padding: 1rem 1.25rem; color: #92400E; font-size: 0.9rem; line-height: 1.65;
}

/* ─── Forms ──────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 0.375rem; }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--c-text); }
.form-input {
  padding: 0.65rem 1rem; border: 1.5px solid var(--c-border); border-radius: var(--r);
  font-size: 0.9375rem; color: var(--c-text); background: var(--c-white);
  transition: border-color 0.15s ease; width: 100%;
}
.form-input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(29,78,216,.12); }
.form-input::placeholder { color: var(--c-light); }
textarea.form-input { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ─── Footer ─────────────────────────────────────────────── */
.footer { background: var(--c-dark); color: rgba(255,255,255,.7); padding: 5rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 4rem; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .nav-logo { color: white; margin-bottom: 1rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.75; color: rgba(255,255,255,.55); max-width: 260px; }
.footer-col h4 { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,.45); margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-col ul li a { font-size: 0.9375rem; color: rgba(255,255,255,.6); transition: color 0.15s ease; }
.footer-col ul li a:hover { color: white; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 2rem; gap: 1rem; flex-wrap: wrap; }
.footer-bottom p { font-size: 0.875rem; }
.footer-bottom-links { display: flex; gap: 1.5rem; }
.footer-bottom-links a { font-size: 0.875rem; color: rgba(255,255,255,.5); transition: color 0.15s ease; }
.footer-bottom-links a:hover { color: rgba(255,255,255,.85); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ─── Category pills ─────────────────────────────────────── */
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; }
.category-pill {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 1rem 1.25rem; border: 1.5px solid var(--c-border);
  border-radius: var(--r-lg); font-size: 0.9375rem; font-weight: 500;
  color: var(--c-text); background: white; transition: all 0.2s ease;
}
.category-pill:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-bg); transform: translateY(-1px); }
.category-pill .cat-icon { font-size: 1.5rem; }
@media (max-width: 900px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .category-grid { grid-template-columns: 1fr; } }

/* ─── Platform feature rows ──────────────────────────────── */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; padding: 4rem 0; }
.feature-row:not(:last-child) { border-bottom: 1px solid var(--c-border); }
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
.feature-visual {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-xl); padding: 2.5rem; min-height: 280px;
  display: flex; align-items: center; justify-content: center;
}
@media (max-width: 768px) {
  .feature-row { grid-template-columns: 1fr; gap: 2rem; direction: ltr; }
  .feature-row.reverse { direction: ltr; }
}

/* ─── Blog cards ─────────────────────────────────────────── */
.blog-card { border: 1px solid var(--c-border); border-radius: var(--r-lg); overflow: hidden; background: white; transition: all 0.2s ease; }
.blog-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.blog-card-img { height: 200px; background: var(--c-surface); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.blog-card-body { padding: 1.5rem; }
.blog-card-tag { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-primary); margin-bottom: 0.5rem; }
.blog-card h3 { font-size: 1.0625rem; margin-bottom: 0.5rem; line-height: 1.4; }
.blog-card p { font-size: 0.9rem; }
.blog-card-meta { font-size: 0.8125rem; color: var(--c-light); margin-top: 1rem; }

/* ─── Utilities ──────────────────────────────────────────── */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }
.wrap { flex-wrap: wrap; }
.w-full { width: 100%; }
.max-w-lg { max-width: 640px; }
.max-w-xl { max-width: 800px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.rounded { border-radius: var(--r); }
.rounded-lg { border-radius: var(--r-lg); }
.surface { background: var(--c-surface); }
.border-top { border-top: 1px solid var(--c-border); }
.border-bottom { border-bottom: 1px solid var(--c-border); }
.text-primary { color: var(--c-primary); }
.text-muted { color: var(--c-muted); }
.text-sm { font-size: 0.9375rem; }
.text-xs { font-size: 0.875rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }