:root {
  --bg: #f5efe3;
  --bg-soft: #fcf8ef;
  --ink: #102a43;
  --ink-soft: #39536c;
  --line: #d8cdbd;
  --teal: #0f766e;
  --teal-dark: #0b4f4a;
  --gold: #d9a441;
  --gold-light: #f5d98a;
  --purple: #7c3aed;
  --purple-light: #ede9fe;
  --green: #16a34a;
  --green-light: #dcfce7;
  --card: rgba(255, 252, 246, 0.92);
  --shadow: 0 4px 24px rgba(16, 42, 67, 0.09);
  --shadow-hover: 0 8px 32px rgba(16, 42, 67, 0.15);
  --radius: 20px;
  --radius-sm: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.10), transparent 24rem),
    radial-gradient(circle at top right, rgba(217, 164, 65, 0.15), transparent 20rem),
    var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── NAV ── */
.hero {
  padding: 1.25rem 1.25rem 3.5rem;
}

.topbar,
.hero-grid,
.section,
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.4rem 0 2.5rem;
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.toplinks {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.toplinks a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.93rem;
}

.toplinks a:hover {
  color: var(--teal);
}

/* ── HERO ── */
.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  gap: 1.5rem;
  align-items: stretch;
}

.hero-copy,
.hero-card {
  background: var(--card);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(216, 205, 189, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 2.25rem 2rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--teal);
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  max-width: 12ch;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  max-width: 18ch;
}

h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.hero-text {
  margin: 0 0 1.6rem;
  max-width: 50ch;
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  transition: opacity 0.15s, transform 0.1s;
}

.btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: #fff;
}

.btn-secondary {
  border: 1.5px solid rgba(16, 42, 67, 0.2);
  color: var(--ink);
}

/* ── HERO CARD ── */
.hero-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card-label {
  margin: 0;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink);
}

.link-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  background: #fff;
  border: 1px solid rgba(16, 42, 67, 0.1);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
}

.link-box code {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.82rem;
  overflow-wrap: anywhere;
  color: var(--teal-dark);
}

.copy-btn {
  border: 0;
  border-radius: 999px;
  background: var(--gold);
  color: #1d232f;
  padding: 0.65rem 1rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.copy-btn:hover {
  opacity: 0.85;
}

.card-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.quick-stats {
  display: flex;
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

.stat strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal);
}

.stat span {
  font-size: 0.75rem;
  color: var(--ink-soft);
  text-align: center;
}

/* ── SECTIONS ── */
.section {
  padding: 4rem 1.25rem;
}

.section-soft {
  background: linear-gradient(180deg, rgba(255,252,246,0), rgba(255,252,246,0.9));
}

.section-accent {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.06), rgba(217, 164, 65, 0.07)),
    transparent;
}

.section-head {
  margin-bottom: 2.5rem;
}

.section-desc {
  margin: 0.75rem 0 0;
  max-width: 60ch;
  color: var(--ink-soft);
  font-size: 1rem;
}

/* ── CLASSES GRID ── */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.class-card {
  background: var(--card);
  border: 1px solid rgba(216, 205, 189, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  gap: 0;
  flex-direction: column;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.15s;
}

.class-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.class-card-diag {
  border-left: 4px solid var(--gold);
}

.class-card-ml {
  border-left: 4px solid var(--purple);
}

.class-card-final {
  border-left: 4px solid var(--green);
}

.class-num {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--teal);
  padding: 1rem 1.25rem 0;
}

.class-body {
  padding: 0.5rem 1.25rem 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.class-icon {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.class-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
  color: var(--ink);
}

.class-card p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
}

.class-topics {
  margin: 0;
  padding-left: 1.1rem;
  list-style: disc;
}

.class-topics li {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 0.2rem;
}

/* ── METHODOLOGY TIMELINE ── */
.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.timeline-step {
  background: var(--card);
  border: 1px solid rgba(216, 205, 189, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  gap: 1rem;
  padding: 1.4rem;
  align-items: flex-start;
}

.step-number {
  flex: 0 0 auto;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--teal);
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
}

.timeline-step h3 {
  margin-bottom: 0.35rem;
}

.timeline-step p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* ── RESOURCES ── */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.resource-card {
  background: var(--card);
  border: 1px solid rgba(216, 205, 189, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.resource-icon {
  font-size: 1.8rem;
}

.resource-card h3 {
  margin: 0;
}

.resource-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  flex: 1;
}

.resource-card a {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--teal-dark);
}

/* ── RULES ── */
.rule-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.rule-card {
  background: var(--card);
  border: 1px solid rgba(216, 205, 189, 0.8);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

.rule-icon {
  font-size: 1.8rem;
  margin-bottom: 0.6rem;
}

.rule-card h3 {
  margin-bottom: 0.4rem;
}

.rule-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* ── FOOTER ── */
.footer {
  padding: 2rem 1.25rem;
  border-top: 1px solid var(--line);
  background: rgba(255,252,246,0.6);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-inner strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
}

.footer-inner p {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
}

/* ── RESPONSIVE ── */
@media (max-width: 1000px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .resource-grid,
  .rule-grid {
    grid-template-columns: 1fr 1fr;
  }

  .timeline {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding-bottom: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-copy {
    padding: 1.5rem;
  }

  .hero-card {
    padding: 1.4rem;
  }

  .link-box {
    grid-template-columns: 1fr;
  }

  .resource-grid,
  .rule-grid {
    grid-template-columns: 1fr;
  }

  .classes-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}