/* ==============================
   Quiz Content Media — Global Styles
   ============================== */

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

:root {
  --color-navy: #1a2744;
  --color-navy-light: #2a3d5c;
  --color-slate: #475569;
  --color-muted: #64748b;
  --color-light-gray: #f1f5f9;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --color-accent: #3b6fc0;
  --color-accent-light: #ebf1fa;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1120px;
  --section-padding: 96px 24px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-navy);
  background-color: var(--color-white);
  line-height: 1.7;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-navy);
}

img {
  max-width: 100%;
  display: block;
}

/* ==============================
   Typography
   ============================== */

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-navy);
}

h1 {
  font-size: 2.75rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
}

p {
  color: var(--color-slate);
  max-width: 640px;
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

/* ==============================
   Layout
   ============================== */

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

.section {
  padding: var(--section-padding);
}

.section--gray {
  background-color: var(--color-light-gray);
}

/* ==============================
   Header / Navigation
   ============================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: -0.02em;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-slate);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-navy);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 1px;
  transition: transform 0.2s ease;
}

/* ==============================
   Hero
   ============================== */

.hero {
  padding: 120px 24px 96px;
  text-align: center;
}

.hero h1 {
  margin-bottom: 20px;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--color-muted);
  margin-bottom: 16px;
  max-width: 100%;
}

.hero p {
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto 40px;
  color: var(--color-slate);
}

.hero .cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==============================
   Buttons
   ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-navy-light);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-navy);
  color: var(--color-navy);
}

/* ==============================
   Stats Bar
   ============================== */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 56px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-muted);
  font-weight: 500;
}

/* ==============================
   About Section
   ============================== */

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-content h2 {
  margin-bottom: 20px;
}

.about-content p {
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  gap: 24px;
}

.about-feature {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: border-color 0.2s ease;
}

.about-feature:hover {
  border-color: var(--color-accent);
}

.about-feature h3 {
  margin-bottom: 8px;
  font-size: 1.0625rem;
}

.about-feature p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ==============================
   Portfolio Cards
   ============================== */

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.portfolio-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 36px 32px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.portfolio-card:hover {
  box-shadow: 0 8px 32px rgba(26, 39, 68, 0.08);
  transform: translateY(-2px);
}

.portfolio-card .card-domain {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.portfolio-card h3 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.portfolio-card .card-category {
  font-size: 0.875rem;
  color: var(--color-muted);
  font-weight: 500;
  margin-bottom: 16px;
}

.portfolio-card .card-description {
  font-size: 0.9375rem;
  color: var(--color-slate);
  margin-bottom: 20px;
  max-width: 100%;
}

.portfolio-card .card-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.card-stat-value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.2;
}

.card-stat-label {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.portfolio-card .card-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.portfolio-card .card-link:hover {
  gap: 10px;
}

.portfolio-card .card-link::after {
  content: '\2192';
  transition: margin-left 0.2s ease;
}

/* ==============================
   CTA Section
   ============================== */

.cta-section {
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section p {
  margin: 0 auto 32px;
  font-size: 1.0625rem;
}

/* ==============================
   Page Header (interior pages)
   ============================== */

.page-header {
  padding: 80px 24px 48px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ==============================
   Contact Page
   ============================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 16px;
}

.contact-info p {
  margin-bottom: 24px;
}

.contact-detail {
  margin-bottom: 32px;
}

.contact-detail h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.contact-detail a,
.contact-detail p {
  font-size: 1.0625rem;
  color: var(--color-navy);
  margin-bottom: 0;
}

.contact-form-panel {
  background: var(--color-light-gray);
  border-radius: 16px;
  padding: 40px;
}

.contact-form-panel h3 {
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-white);
  color: var(--color-navy);
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ==============================
   Privacy Policy / Legal
   ============================== */

.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.legal-content h2 {
  font-size: 1.375rem;
  margin-top: 48px;
  margin-bottom: 12px;
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p {
  margin-bottom: 16px;
  max-width: 100%;
}

.legal-content ul {
  margin: 0 0 16px 24px;
  color: var(--color-slate);
}

.legal-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.legal-meta {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

/* ==============================
   Footer
   ============================== */

.site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 24px 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .site-logo {
  color: var(--color-white);
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}

.footer-links h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 16px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ==============================
   Responsive
   ============================== */

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 20px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero {
    padding: 80px 20px 64px;
  }

  .hero .tagline {
    font-size: 1.0625rem;
  }

  .hero p {
    font-size: 1rem;
  }

  /* Nav */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }

  .site-nav.open {
    display: flex;
  }

  /* Stats */
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 40px 0;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  /* About */
  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.75rem;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .portfolio-card {
    padding: 28px 24px;
  }
}