/* ═══════════════════════════════════════════════════════════════
   ABCLearning — styles.css
   Clean, minimal teacher-resource aesthetic
   ═══════════════════════════════════════════════════════════════ */

/* ── Design tokens ───────────────────────────────────────────── */
:root {
  /* Palette */
  --bg:            #ffffff;
  --bg-soft:       #f7f8fc;
  --bg-alt:        #f0f2f8;
  --border:        #e2e6ef;
  --text:          #1a2340;
  --text-muted:    #64748b;
  --text-light:    #94a3b8;

  /* Brand */
  --primary:       #1e3a6e;
  --primary-mid:   #2952a3;
  --primary-light: #eaf0fb;

  /* Accent (CTA, highlights) */
  --accent:        #e8a020;
  --accent-light:  #fef6e4;

  /* Category colours — understated */
  --maths:         #1e3a6e;
  --maths-light:   #eaf0fb;
  --phonics:       #14532d;
  --phonics-light: #e8f5ee;
  --art:           #7c2d12;
  --art-light:     #fef0ec;

  /* Elevation */
  --shadow-xs:  0 1px 2px rgba(0,0,0,.06);
  --shadow-sm:  0 1px 4px rgba(0,0,0,.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,.09);
  --shadow-lg:  0 8px 24px rgba(0,0,0,.11);

  /* Geometry */
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --max-w:      1160px;

  /* Type */
  --font:       'Inter', 'Segoe UI', system-ui, sans-serif;
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: var(--font); cursor: pointer; }
ul { list-style: none; }

/* ── Typography helpers ──────────────────────────────────────── */
.section-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-top: 6px;
}
.section-sub {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 560px;
}

/* ── Layout helpers ──────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 64px 0; }
.section-alt { background: var(--bg-soft); }

/* ── Ad zones ────────────────────────────────────────────────── */
.ad-zone {
  background: var(--bg-alt);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.ad-zone::before { content: 'Advertisement'; }

.ad-banner  { width: 100%; min-height: 72px; border-radius: 0; border-left: none; border-right: none; }
.ad-sidebar { width: 300px; min-height: 600px; flex-shrink: 0; position: sticky; top: 80px; align-self: flex-start; }
.ad-mid-grid { grid-column: 1 / -1; min-height: 80px; }

/* ════════════════════════════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════════════════════════════ */
#site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Brand */
.nav-brand {
  font-size: 1.25rem;
  font-weight: 900;
  flex-shrink: 0;
  display: flex;
  align-items: baseline;
  gap: 1px;
}
.brand-abc      { color: var(--primary); }
.brand-learning { color: var(--accent); }

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-links a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: background .14s, color .14s;
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
}

/* CTA link */
.nav-cta {
  margin-left: auto !important;
  background: var(--accent-light) !important;
  color: var(--accent) !important;
  border: 1.5px solid #f0c060;
  border-radius: var(--radius-sm) !important;
  padding: 6px 14px !important;
  font-weight: 700 !important;
}
.nav-cta:hover {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: var(--accent) !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 6px;
  margin-left: auto;
  color: var(--text);
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

/* Mobile nav */
@media (max-width: 780px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 62px;
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px 20px;
    gap: 2px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 10px 12px; }
  .nav-cta { margin-left: 0 !important; }
}

/* ════════════════════════════════════════════════════════════════
   LANDING PAGE — index.html
   ════════════════════════════════════════════════════════════════ */

/* Hero */
.hero {
  background: var(--primary);
  color: #fff;
  padding: 80px 0 72px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-block;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.22);
  color: rgba(255,255,255,.9);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  max-width: 640px;
  margin: 0 auto 16px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,.78);
  max-width: 500px;
  margin: 0 auto 32px;
}
.hero-btns {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 700;
  border: none;
  transition: opacity .15s, transform .12s;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { opacity: .88; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #1a1000; }
.btn-outline  { background: rgba(255,255,255,.12); color: #fff; border: 1.5px solid rgba(255,255,255,.35); }

/* Stats bar */
.stats-bar {
  background: var(--primary-mid);
  border-top: 1px solid rgba(255,255,255,.08);
}
.stats-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.stat-item {
  padding: 18px 0;
  text-align: center;
  color: #fff;
}
.stat-num  { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.stat-lbl  { font-size: .75rem; font-weight: 600; color: rgba(255,255,255,.65); margin-top: 2px; letter-spacing: .05em; text-transform: uppercase; }

/* Category cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.category-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow .18s, transform .15s;
  text-decoration: none;
  color: var(--text);
}
.category-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.category-icon {
  font-size: 2rem;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}
.category-card.maths   .category-icon { background: var(--maths-light); }
.category-card.phonics .category-icon { background: var(--phonics-light); }
.category-card.art     .category-icon { background: var(--art-light); }

.category-card h3 { font-size: 1.1rem; font-weight: 800; }
.category-card p  { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }
.category-count   { font-size: .78rem; font-weight: 700; margin-top: auto; padding-top: 12px; }
.category-card.maths   .category-count { color: var(--maths); }
.category-card.phonics .category-count { color: var(--phonics); }
.category-card.art     .category-count { color: var(--art); }

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
  counter-reset: steps;
}
.step {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1.5px solid var(--border);
  position: relative;
}
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step h3 { font-size: 1rem; font-weight: 800; margin-bottom: 6px; }
.step p  { font-size: .88rem; color: var(--text-muted); }

/* Featured worksheets */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

/* Story / origin section */
.story-section {
  background: var(--primary);
  color: #fff;
}
.story-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.story-section blockquote {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  line-height: 1.8;
  color: rgba(255,255,255,.88);
  font-style: italic;
  font-weight: 400;
  margin: 24px 0;
  position: relative;
  padding: 0 24px;
}
.story-section blockquote::before {
  content: '\201C';
  font-size: 4rem;
  color: var(--accent);
  position: absolute;
  top: -16px;
  left: 0;
  line-height: 1;
  font-style: normal;
}
.story-attr {
  font-size: .88rem;
  font-weight: 700;
  color: rgba(255,255,255,.6);
}

/* ════════════════════════════════════════════════════════════════
   WORKSHEET GRID — worksheets.html + category pages
   ════════════════════════════════════════════════════════════════ */

/* Page hero (category pages) */
.page-hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.page-hero h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 900; }
.page-hero p  { font-size: .95rem; color: var(--text-muted); margin-top: 8px; }
.page-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-lg);
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 12px;
}
.badge-maths   { background: var(--maths-light);   color: var(--maths); }
.badge-phonics { background: var(--phonics-light);  color: var(--phonics); }
.badge-art     { background: var(--art-light);      color: var(--art); }

/* Filter bar */
#filter-bar {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 62px;
  z-index: 100;
}
.filter-row {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.filter-group  { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-label  { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); white-space: nowrap; }
.filter-pills  { display: flex; flex-wrap: wrap; gap: 5px; }

.pill {
  border: 1.5px solid var(--border);
  border-radius: 99px;
  padding: 4px 14px;
  font-size: .8rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-muted);
  transition: all .14s;
}
.pill:hover { border-color: var(--primary); color: var(--primary); }
.pill.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.pill-maths.active   { background: var(--maths);   border-color: var(--maths); }
.pill-phonics.active { background: var(--phonics);  border-color: var(--phonics); }
.pill-art.active     { background: var(--art);      border-color: var(--art); }

.result-count {
  margin-left: auto;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Page layout */
#page-layout {
  display: flex;
  gap: 28px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 24px;
  align-items: flex-start;
}
#card-grid-wrapper { flex: 1; min-width: 0; }

/* Card grid */
#card-grid, .featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 20px;
}

/* Card */
.card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .18s, transform .15s;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.card-thumbnail-wrap {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--bg-alt);
  overflow: hidden;
}
.card-thumbnail {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform .3s;
}
.card:hover .card-thumbnail { transform: scale(1.04); }

.card-body {
  padding: 14px 16px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.card-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

/* Card skill badge */
.card-badge {
  border-radius: 99px;
  padding: 2px 9px;
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #fff;
}
.badge-Maths   { background: var(--maths); }
.badge-Phonics { background: var(--phonics); }
.badge-Art     { background: var(--art); }

.card-age   { font-size: .73rem; font-weight: 600; color: var(--text-muted); }
.card-title { font-size: .92rem; font-weight: 700; line-height: 1.3; color: var(--text); margin-top: 4px; }
.card-topic { font-size: .78rem; color: var(--text-muted); }

.card-print-btn {
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 9px 0;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius);
  background: transparent;
  color: var(--primary);
  font-size: .84rem;
  font-weight: 700;
  transition: background .14s, color .14s;
}
.card-print-btn:hover { background: var(--primary); color: #fff; }

/* No results */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
}
.hidden { display: none !important; }

/* ════════════════════════════════════════════════════════════════
   ABOUT PAGE
   ════════════════════════════════════════════════════════════════ */
.about-layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px;
}
.about-layout h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 12px;
}
.about-layout .lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}
.about-layout h2 {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 36px 0 10px;
  color: var(--primary);
}
.about-layout p {
  font-size: .97rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-layout a { color: var(--primary); font-weight: 600; text-decoration: underline; }

.about-callout {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 28px 0;
  font-size: .92rem;
  color: var(--text);
  line-height: 1.7;
}

/* ════════════════════════════════════════════════════════════════
   SUGGEST PAGE
   ════════════════════════════════════════════════════════════════ */
.suggest-layout {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 24px;
}
.suggest-layout h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 10px;
}
.suggest-layout .lead {
  font-size: .97rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 22px; }
.form-group label { font-size: .85rem; font-weight: 700; color: var(--text); }
.form-group span  { font-size: .78rem; color: var(--text-muted); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: .92rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color .14s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { min-height: 130px; resize: vertical; line-height: 1.6; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.submit-btn {
  width: 100%;
  padding: 13px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .14s, transform .12s;
}
.submit-btn:hover { background: var(--primary-mid); transform: translateY(-1px); }

.form-note {
  font-size: .78rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 14px;
}

/* Success message (shown after submit) */
.form-success {
  text-align: center;
  padding: 48px 24px;
  display: none;
}
.form-success h2 { font-size: 1.4rem; font-weight: 800; margin-bottom: 10px; }
.form-success p  { color: var(--text-muted); font-size: .95rem; }

/* ════════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════════ */
#site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand-name {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 8px;
}
.footer-tagline { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }

.footer-col h4 { font-size: .8rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-bottom: 14px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a  { font-size: .88rem; color: var(--text-muted); transition: color .12s; }
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 32px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: .78rem; color: var(--text-light); }
.footer-bottom a { color: var(--primary); font-weight: 600; font-size: .78rem; }

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .ad-sidebar { display: none; }
  #page-layout { padding: 20px 16px; }
  .category-grid { grid-template-columns: 1fr; gap: 14px; }
  .steps { grid-template-columns: 1fr; gap: 16px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  #card-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .featured-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .filter-row { padding: 10px 16px; }
  .hero { padding: 56px 0 48px; }
  .stats-inner { gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 48px 0; }
}

@media (max-width: 400px) {
  #card-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
}