:root {
  --accent: #e8552b;
  --accent-dark: #d1481f;
  --dark: #1f2733;
  --text: #2c333d;
  --muted: #5b6472;
  --bg: #ffffff;
  --panel-bg: #f4f1ec;
  --border: #e3ddd2;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  transition: color 150ms ease;
}

/* Site nav (every page) */

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--dark);
}

.site-nav-brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

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

.site-nav-links a {
  color: #d8dce2;
  text-decoration: none;
  font-weight: 600;
}

.site-nav-links a:hover {
  color: #fff;
}

/* Site footer (every page) */

.site-footer {
  text-align: center;
  color: var(--muted);
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

/* Hero (home page) */

.hero {
  background: var(--dark);
  color: #fff;
  padding: 3rem 1.5rem;
  text-align: center;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: 2.2rem;
}

.hero p {
  max-width: 700px;
  margin: 0 auto 1.5rem;
  font-size: 1.1rem;
  color: #d8dce2;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  transition: transform 160ms var(--ease-out), background-color 150ms ease;
}

.button:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .button:hover {
    background: var(--accent-dark);
  }
}

/* Card grid (curriculum ladder, grade lists, materials groups) */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(31, 39, 51, 0.1);
  }
}

.card h3 {
  margin: 0 0 0.5rem;
}

.card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

/* Tools / materials tables */

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  background: var(--panel-bg);
  font-size: 0.95rem;
}

.data-table tbody tr {
  transition: background-color 150ms ease;
}

@media (hover: hover) and (pointer: fine) {
  .data-table tbody tr:hover {
    background: var(--panel-bg);
  }
}

/* Session pages (concept/foundations content, no step gallery) */

.session-content h2 {
  margin-top: 2.5rem;
}

.session-content img {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: block;
  margin: 1rem 0;
}

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 1.5rem 0 0;
}

.breadcrumb a {
  color: var(--muted);
}

.page-header {
  padding: 0 0 1rem;
}

.page-header h1 {
  margin: 0.5rem 0 0.5rem;
}

.page-header p {
  color: var(--muted);
  max-width: 700px;
}

.banner {
  background: var(--dark);
  line-height: 0;
}

.banner img {
  width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.color-key {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 2rem auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: center;
  font-weight: 600;
}

.step {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.step:last-of-type {
  border-bottom: none;
}

.step.reverse {
  flex-direction: row-reverse;
}

.step-text,
.step-image {
  flex: 1 1 0;
  min-width: 0;
}

.step-image img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: block;
}

.step-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.step-number {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.step-title h2 {
  margin: 0;
  font-size: 1.3rem;
}

.step-text p {
  margin: 0;
  color: var(--text);
}

.closing {
  background: var(--panel-bg);
  border-radius: 10px;
  text-align: center;
  padding: 3rem 1.5rem;
  margin: 3rem 0 4rem;
}

.closing img {
  max-width: 600px;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.closing h2 {
  font-size: 1.8rem;
  margin: 0 0 1rem;
}

.closing p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--muted);
}

@media (max-width: 700px) {
  .step,
  .step.reverse {
    flex-direction: column;
  }

  .step-image {
    order: -1;
    width: 100%;
  }

  .banner h1 {
    font-size: 1.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button:active,
  .card:hover {
    transform: none;
  }
}