:root {
  --bg: #0b1120;
  --bg-panel: #111a2e;
  --bg-card: #16213a;
  --border: #26324d;
  --text: #e7ecf7;
  --text-dim: #9fb0cc;
  --accent: #4fd1c5;
  --accent-2: #7c9eff;
  --danger: #ff8a8a;
  --radius: 12px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Ubuntu, Arial, sans-serif;
  line-height: 1.55;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent-2); }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 12px; }
p { margin: 0 0 12px; color: var(--text-dim); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 8px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 17, 32, .92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}
.brand-text { display: flex; flex-direction: column; }
.brand-mark {
  font-size: 26px;
  color: var(--accent);
}
.brand-title { font-weight: 700; font-size: 16px; color: var(--text); }
.brand-sub { font-size: 12px; color: var(--text-dim); }

.site-nav { display: flex; align-items: center; gap: 8px; }
.nav-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  padding: 9px 14px;
  border-radius: 999px;
  cursor: pointer;
}
.nav-btn:hover { color: var(--text); border-color: var(--border); }
.nav-caret { font-size: 11px; display: inline-block; transition: transform .15s ease; }
.nav-btn[aria-expanded="true"] .nav-caret { transform: rotate(180deg); }
.nav-btn[aria-expanded="true"] { color: var(--accent); border-color: var(--border); }
.nav-dropdown { position: relative; }
.nav-dropdown-panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: min(420px, 92vw);
  max-height: 70vh;
  overflow-y: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(0,0,0,.45);
  padding: 14px;
  z-index: 20;
}
.nav-dropdown-panel.open { display: block; }
.nav-dropdown-panel .module-group { margin-bottom: 14px; }
.nav-dropdown-panel .module-group:last-child { margin-bottom: 0; }

.module-group-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent-2);
  margin: 0 0 8px;
}
.module-list { display: flex; flex-direction: column; gap: 4px; }
.module-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
}
.module-item .module-name { color: var(--text-dim); }
.module-item.disabled { opacity: .65; }
button.module-item.available {
  background: none;
  border: none;
  width: 100%;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
}
button.module-item.available:hover { background: rgba(79, 209, 197, .1); }
button.module-item.available .module-name { color: var(--text); font-weight: 600; }

.module-badge {
  flex: none;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: 3px 8px;
  border-radius: 999px;
}
.module-badge-ready { background: rgba(79, 209, 197, .18); color: var(--accent); }
.module-badge-soon { background: rgba(159, 176, 204, .12); color: var(--text-dim); }

/* hero */
.hero { padding: 56px 24px 24px; }
.hero h1 { font-size: 34px; max-width: 760px; }
.hero-lead { font-size: 17px; max-width: 680px; }

.block { padding: 40px 24px; }
.block h2 { font-size: 24px; }
.section-lead { max-width: 760px; }

/* topic weight bars */
.topic-weights { display: flex; flex-direction: column; gap: 14px; margin-top: 20px; }
.weight-row {
  display: grid;
  grid-template-columns: 1fr 160px 56px;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
}
.weight-row:hover { border-color: var(--accent); }
.weight-label { color: var(--text); font-size: 14px; font-weight: 600; }
.weight-bar { height: 8px; border-radius: 4px; background: #0e1626; overflow: hidden; }
.weight-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.weight-pct { text-align: right; color: var(--text-dim); font-size: 13px; }

@media (max-width: 640px) {
  .weight-row { grid-template-columns: 1fr; }
  .weight-bar { order: 2; }
  .weight-pct { order: 3; text-align: left; }
}

/* topic block */
.topic-block { border-top: 1px solid var(--border); }
.topic-block h2 { max-width: 760px; font-size: 22px; }

.subtopic { margin-top: 28px; }
.subtopic-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  margin-bottom: 16px;
}
.subtopic-header h3 { font-size: 18px; color: var(--accent); margin: 0; }
.subtopic-share { font-size: 12px; color: var(--text-dim); }

/* theory material toggle */
.material-wrap { margin-top: 14px; }
.material-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}
.material-toggle:hover { border-color: var(--accent); color: var(--accent); }
.material-toggle::after {
  content: "▾";
  font-size: 11px;
  color: var(--text-dim);
  transition: transform .15s ease;
}
.material-toggle.open::after { transform: rotate(180deg); }
.material-toggle.open { border-color: var(--accent); color: var(--accent); }

.material-panel {
  display: none;
  margin-top: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.material-panel.open { display: block; }
.material-panel h5 {
  font-size: 13.5px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--accent-2);
  margin: 18px 0 8px;
}
.material-panel h5:first-child { margin-top: 0; }
.material-panel p { font-size: 14.5px; color: var(--text); margin-bottom: 12px; }
.material-panel ul { margin: 0 0 12px; padding-left: 20px; color: var(--text); }
.material-panel li { margin-bottom: 6px; font-size: 14.5px; }

.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.item-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.item-card h4 { font-size: 14.5px; color: var(--text); margin-bottom: 12px; }

.level-tabs { display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
.level-tab {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
}
.level-tab:hover { border-color: var(--accent-2); color: var(--text); }
.level-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0b1120;
}

.level-panels { position: relative; }
.level-panel { display: none; }
.level-panel.visible { display: block; }
.level-panel p { color: var(--text-dim); font-size: 14px; margin: 0; }

/* sources */
.sources { color: var(--text-dim); padding-left: 20px; font-size: 13.5px; }
.sources li { margin-bottom: 8px; }

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  text-decoration: none;
}

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  margin-top: 20px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer p { font-size: 12.5px; color: var(--text-dim); margin: 0; max-width: 760px; }
.footer-download {
  flex: none;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.footer-download:hover { border-color: var(--accent); }

/* ===================== TITULLAPA ===================== */

.home-hero {
  position: relative;
  overflow: hidden;
  padding: 96px 24px 72px;
  border-bottom: 1px solid var(--border);
}
.home-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 18%, rgba(79, 209, 197, .20), transparent 42%),
    radial-gradient(circle at 88% -5%, rgba(124, 158, 255, .18), transparent 46%),
    repeating-linear-gradient(60deg, rgba(255,255,255,.035) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(-60deg, rgba(255,255,255,.035) 0 1px, transparent 1px 34px);
  mask-image: linear-gradient(180deg, #000 0%, #000 60%, transparent 100%);
}
.home-hero-inner { position: relative; z-index: 1; }

.home-kicker {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 16px;
}
.home-title {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: .005em;
  max-width: 880px;
  margin: 0 0 18px;
  background: linear-gradient(100deg, var(--text) 30%, var(--accent-2) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.home-tagline { font-size: 17px; max-width: 620px; margin-bottom: 28px; }
.home-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 34px; }
.home-badge {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text-dim);
  padding: 7px 13px;
  border-radius: 999px;
}
.home-cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #07111f;
  font-weight: 700;
  border: none;
  padding: 13px 22px;
  border-radius: 999px;
  font-size: 14.5px;
  cursor: pointer;
  font-family: inherit;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 13px 22px;
  border-radius: 999px;
  font-size: 14.5px;
  cursor: pointer;
  font-family: inherit;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.home-block { padding: 48px 24px; border-top: 1px solid var(--border); }
.home-block-title { font-size: 24px; margin-bottom: 8px; }

.home-goal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 30px;
}
.home-goal-card h2 { margin-top: 0; font-size: 20px; }
.home-goal-card p { color: var(--text); font-size: 15.5px; margin: 0; }

.home-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.stat-tile {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.stat-label { font-size: 13.5px; font-weight: 600; color: var(--text); margin-top: 8px; }
.stat-sub { font-size: 12px; color: var(--text-dim); margin-top: 2px; }

.home-structure {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.structure-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.structure-tag {
  display: inline-block;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #07111f;
  background: var(--accent);
  padding: 3px 9px;
  border-radius: 6px;
  margin-bottom: 12px;
  font-weight: 700;
}
.structure-card h3 { font-size: 16px; margin-bottom: 8px; }
.structure-card p { font-size: 13.5px; margin: 0; }

.home-outcomes { margin: 20px 0 0; padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 11px; }
.home-outcomes li { position: relative; padding-left: 26px; font-size: 14.5px; color: var(--text); }
.home-outcomes li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

.home-modules-groups { display: flex; flex-direction: column; gap: 30px; margin-top: 20px; }
.module-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
.module-card {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.module-card.disabled { opacity: .6; }
button.module-card.available { cursor: pointer; font-family: inherit; text-align: left; }
button.module-card.available:hover { border-color: var(--accent); }
.module-card .module-name { font-size: 14px; color: var(--text); font-weight: 600; }

@media (max-width: 560px) {
  .home-hero { padding: 72px 20px 56px; }
  .home-cta-row { flex-direction: column; }
  .btn-primary, .btn-ghost { text-align: center; }
}