/* 01. PAGE FOUNDATION */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(180deg, #eef4ff 0%, #fff7ed 100%);
  color: #0f172a;
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.panel {
  margin-top: 28px;
  padding: 30px;
  background: #ffffff;
  border-radius: 28px;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.section-label,
.mini-label,
.eyebrow,
.role {
  text-transform: uppercase;
  letter-spacing: 1.8px;
  font-size: 13px;
  font-weight: 700;
}

.section-label {
  margin: 0 0 12px;
  color: #1d4ed8;
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 34px;
  line-height: 1.15;
}

.panel h3 {
  margin: 0 0 10px;
  font-size: 28px;
  line-height: 1.15;
}

.panel p,
.panel li {
  font-size: 17px;
  line-height: 1.75;
}

code {
  background: #e2e8f0;
  padding: 2px 8px;
  border-radius: 8px;
  color: #0f172a;
}

/* 02. HERO */
.hero {
  padding: 54px 36px;
  border-radius: 32px;
  text-align: center;
  background: linear-gradient(135deg, #0f172a, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 22px 40px rgba(15, 23, 42, 0.2);
}

.hero .section-label {
  color: #bfdbfe;
}

.hero h1 {
  max-width: 920px;
  margin: 0 auto 16px;
  font-size: 50px;
  line-height: 1.08;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.24);
}

.hero-text {
  max-width: 820px;
  margin: 0 auto 18px;
  color: #dbeafe;
  word-spacing: 2px;
}

.hero-link {
  color: #ffffff;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 03. ORDER PANEL */
.lesson-order {
  border-left: 8px solid #1d4ed8;
}

.lesson-order ol {
  margin: 0;
  padding-left: 24px;
}

/* 04. TYPOGRAPHY LAB */
.lead-text {
  color: #334155;
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.type-card {
  padding: 24px;
  background: #f8fafc;
  border-radius: 22px;
}

.mini-label {
  margin: 0 0 10px;
  color: #64748b;
}

.serif-title {
  font-family: Georgia, serif;
}

.heavy {
  font-weight: 700;
}

.italic-note {
  font-style: italic;
  color: #7c2d12;
}

.muted-note {
  color: #64748b;
}

.tracking-demo {
  color: #1d4ed8;
  letter-spacing: 2px;
}

.word-space-demo {
  word-spacing: 5px;
  color: #334155;
}

.center-note {
  text-align: center;
  color: #475569;
}

/* 05. COLOR LAB */
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.swatch {
  padding: 24px;
  border-radius: 22px;
  color: #ffffff;
}

.swatch .mini-label {
  color: rgba(255, 255, 255, 0.75);
}

.swatch-hex {
  background: #1d4ed8;
}

.swatch-rgb {
  background: rgb(29, 78, 216);
}

.swatch-hsl {
  background: hsl(24, 95%, 53%);
}

.contrast-box {
  margin-top: 22px;
  padding: 26px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 22px;
}

.contrast-box h3 {
  color: #0f172a;
}

.contrast-body {
  color: #334155;
}

.contrast-meta {
  margin-bottom: 12px;
  color: #64748b;
  font-size: 14px;
}

.contrast-link {
  color: #1d4ed8;
  font-weight: 700;
  text-decoration: none;
}

.contrast-link:hover {
  text-decoration: underline;
}

/* 06. BACKGROUND LAB */
.background-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.background-card {
  min-height: 220px;
  padding: 24px;
  border-radius: 24px;
}

.solid-surface {
  background-color: #eff6ff;
  color: #1e3a8a;
}

.image-surface {
  color: #0f172a;
  background-color: #ffffff;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Crect width='160' height='160' fill='%23f8fafc'/%3E%3Ccircle cx='40' cy='40' r='12' fill='%23bfdbfe'/%3E%3Ccircle cx='120' cy='40' r='12' fill='%23c7d2fe'/%3E%3Ccircle cx='80' cy='90' r='18' fill='%23fde68a'/%3E%3Cpath d='M20 130 Q80 90 140 130' stroke='%2394a3b8' stroke-width='6' fill='none'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px;
  background-position: center;
}

.gradient-surface {
  background-image: linear-gradient(135deg, #0f172a, #1d4ed8);
  color: #ffffff;
}

.shorthand-banner {
  margin-top: 22px;
  padding: 32px;
  border-radius: 28px;
  color: #ffffff;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(29, 78, 216, 0.82)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220' viewBox='0 0 220 220'%3E%3Crect width='220' height='220' fill='%230f172a'/%3E%3Cpath d='M0 140 C40 90 80 90 120 140 S200 190 220 150' stroke='%23ffffff' stroke-opacity='0.22' stroke-width='6' fill='none'/%3E%3Ccircle cx='50' cy='60' r='16' fill='%23ffffff' fill-opacity='0.14'/%3E%3Ccircle cx='170' cy='70' r='22' fill='%23ffffff' fill-opacity='0.12'/%3E%3C/svg%3E")
    center / cover no-repeat;
}

/* 07. FINAL COMBINED DEMO */
.final-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 18px;
}

.article-card,
.profile-showcase {
  padding: 28px;
  border-radius: 26px;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.article-card {
  background: #ffffff;
}

.eyebrow {
  margin: 0 0 12px;
  color: #1d4ed8;
}

.article-card h3 {
  font-family: Georgia, serif;
}

.meta {
  margin: 0 0 16px;
  color: #64748b;
  font-size: 14px;
}

.summary {
  color: #334155;
}

.article-link {
  color: #1d4ed8;
  font-weight: 700;
  text-decoration: none;
}

.article-link:hover {
  text-decoration: underline;
}

.profile-showcase {
  background: #fff7ed;
  color: #7c2d12;
}

.role {
  margin: 0 0 12px;
  color: #ea580c;
}

.bio {
  margin-bottom: 18px;
  color: #9a3412;
}

.profile-link {
  color: #c2410c;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid #fdba74;
  padding-bottom: 4px;
}

/* 08. SMALL SCREEN */
@media (max-width: 720px) {
  .hero,
  .panel {
    padding: 24px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .panel h2 {
    font-size: 28px;
  }

  .panel h3 {
    font-size: 24px;
  }
}