:root {
  --bg-canvas: #12332b;
  --bg-surface: #20483d;
  --bg-surface-hover: #29594b;
  --text-primary: #e0f2f1;
  --text-muted: #a7c9c5;
  --accent-primary: #ff6f59;
  --accent-secondary: #e55a45;
  --border-subtle: rgba(224, 242, 241, 0.18);
  --shadow-hard: 4px 4px 0px #081a15;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --font-serif: Charter, Cambria, Georgia, serif;
}

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

html, body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.65;
  overflow-wrap: anywhere;
  hyphens: auto;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

a:hover {
  color: #ff9282;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
  object-fit: cover;
  background-color: var(--bg-surface);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.reading-width {
  max-width: 70ch;
  margin-left: auto;
  margin-right: auto;
}

.small-caps {
  font-variant: small-caps;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.4rem;
}

/* Header - Floating Capsule in Normal Document Flow */
.site-header-wrapper {
  padding: 24px 24px 0 24px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.site-header {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  margin-right: auto;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #12332b;
  font-weight: bold;
  font-size: 0.9rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-variant: small-caps;
  letter-spacing: 0.05em;
  padding: 4px 0;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--accent-primary);
  border-bottom: 2px solid var(--accent-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1;
}

.mobile-dropdown {
  display: none;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  margin-top: 12px;
  padding: 20px;
  flex-direction: column;
  gap: 14px;
}

.mobile-dropdown.active {
  display: flex;
}

.mobile-dropdown a {
  color: var(--text-primary);
  text-decoration: none;
  font-variant: small-caps;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

/* Dot Grid Background Pattern (Hero & Preparation Only) */
.dot-grid-bg {
  background-image: radial-gradient(rgba(224, 242, 241, 0.14) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
}

/* Hero Section - Solid Deep Green Field, No Image */
.hero-section {
  padding: 84px 0 64px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-headline {
  font-size: clamp(2.5rem, 5.5vw, 4.4rem);
  line-height: 1.08;
  font-weight: 700;
  margin-bottom: 24px;
  max-width: 18ch;
  color: var(--text-primary);
}

.hero-lead {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 62ch;
  margin-bottom: 36px;
}

/* Buttons - Solid Coral with 4px 4px Hard Shadow */
.btn-coral {
  display: inline-block;
  background-color: var(--accent-primary);
  color: #12332b;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 20px;
  border: 2px solid #081a15;
  box-shadow: var(--shadow-hard);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  cursor: pointer;
}

.btn-coral:hover {
  color: #12332b;
  background-color: #ff826f;
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px #081a15;
}

.btn-secondary {
  display: inline-block;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-hard);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}

.btn-secondary:hover {
  color: var(--accent-primary);
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px #081a15;
}

/* Orientation Block & Panels (20px corners) */
.orientation-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 44px;
  margin: 56px 0;
}

.orientation-panel h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.syllabus-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Two-Column Lesson Groups */
.two-col-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  margin: 56px 0;
  align-items: start;
}

.section-block {
  padding: 56px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 36px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.2;
  margin-bottom: 12px;
}

/* Unboxed Icon-Led Lesson Rows separated by Fine Rules */
.lesson-list {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
}

.lesson-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
  align-items: start;
}

.lesson-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.lesson-body h3 {
  font-size: 1.35rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.lesson-body p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 10px;
}

.prereq-tag {
  display: inline-block;
  font-variant: small-caps;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  background-color: rgba(255, 111, 89, 0.16);
  border: 1px solid rgba(255, 111, 89, 0.4);
  padding: 2px 10px;
  border-radius: 20px;
  margin-right: 10px;
}

/* Worked Counting Examples & Turn-Taking Diagrams */
.counting-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 28px;
  margin: 28px 0;
}

.counting-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
  margin-top: 16px;
  text-align: center;
}

.beat-cell {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px 6px;
}

.beat-cell.accent {
  border-color: var(--accent-primary);
  background-color: rgba(255, 111, 89, 0.12);
}

.beat-num {
  font-weight: 700;
  font-size: 1.1rem;
  display: block;
  color: var(--text-primary);
}

.beat-stroke {
  font-variant: small-caps;
  font-size: 0.85rem;
  color: var(--accent-primary);
}

/* Interactive Checklist & Inputs (20px corners) */
.checklist-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 32px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
}

.checklist-item input[type="checkbox"] {
  width: 22px;
  height: 22px;
  accent-color: var(--accent-primary);
  border-radius: 6px;
  margin-top: 4px;
  flex-shrink: 0;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

.form-control {
  width: 100%;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 14px 18px;
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 1rem;
}

.form-control:focus {
  outline: 2px solid var(--accent-primary);
  border-color: transparent;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-surface);
  text-align: left;
}

th, td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  font-variant: small-caps;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  background-color: rgba(18, 51, 43, 0.5);
}

/* Image Frame */
.study-figure {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 16px;
  margin: 24px 0;
}

.study-figure figcaption {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 12px;
  padding: 0 6px;
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}

.reveal.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  margin-top: 80px;
  padding: 64px 0 48px 0;
  background-color: #0d2620;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

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

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

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.88rem;
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .two-col-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-block;
  }
  .lesson-row {
    grid-template-columns: 40px 1fr;
  }
  .lesson-action {
    grid-column: 2;
    margin-top: 8px;
  }
  .counting-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .orientation-panel {
    padding: 28px 20px;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}