/* ==========================================================================
   TraderPemula — Global Styles (v2 — youth-oriented, vibrant)
   - Default light theme with optional dark
   - Playful gradients, big rounded corners, modern type
   - Plus Jakarta Sans + Space Grotesk via Google Fonts
   ========================================================================== */

:root {
  --bg: #fbfaff;
  --bg-elev: #ffffff;
  --bg-soft: #f4f1ff;
  --bg-tint: #faf7ff;
  --border: #ebe4ff;
  --border-strong: #d8caff;

  --text: #1a103d;
  --text-dim: #4b3d7a;
  --text-mute: #8b81b0;

  --primary: #7c3aed;
  --primary-strong: #6d28d9;
  --primary-soft: rgba(124, 58, 237, 0.10);
  --secondary: #ec4899;
  --secondary-soft: rgba(236, 72, 153, 0.10);
  --accent-cyan: #06b6d4;
  --accent-lime: #84cc16;
  --accent-amber: #f59e0b;
  --accent-orange: #f97316;
  --success: #10b981;
  --warn: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  --grad-hero: linear-gradient(135deg, #a78bfa 0%, #ec4899 50%, #f97316 100%);
  --grad-primary: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
  --grad-cyan: linear-gradient(135deg, #06b6d4 0%, #7c3aed 100%);
  --grad-lime: linear-gradient(135deg, #84cc16 0%, #06b6d4 100%);
  --grad-amber: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.06);
  --shadow: 0 8px 32px rgba(124, 58, 237, 0.10);
  --shadow-lg: 0 20px 48px rgba(124, 58, 237, 0.14);
  --shadow-glow: 0 8px 32px rgba(236, 72, 153, 0.25);

  --maxw: 1140px;
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", "Plus Jakarta Sans", -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #0f0a1e;
  --bg-elev: #1a0f2e;
  --bg-soft: #211a3d;
  --bg-tint: #170d2a;
  --border: #2d2348;
  --border-strong: #3d2f60;
  --text: #f5f1ff;
  --text-dim: #c5b8e8;
  --text-mute: #8475a8;
  --primary: #a78bfa;
  --primary-strong: #8b5cf6;
  --primary-soft: rgba(167, 139, 250, 0.18);
  --secondary: #f472b6;
  --secondary-soft: rgba(244, 114, 182, 0.18);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(244, 114, 182, 0.35);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Decorative background blobs */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(800px circle at 0% 0%, rgba(167, 139, 250, 0.18), transparent 50%),
    radial-gradient(700px circle at 100% 0%, rgba(236, 72, 153, 0.12), transparent 50%),
    radial-gradient(600px circle at 50% 100%, rgba(6, 182, 212, 0.10), transparent 50%);
  z-index: -1;
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(800px circle at 0% 0%, rgba(167, 139, 250, 0.20), transparent 50%),
    radial-gradient(700px circle at 100% 0%, rgba(244, 114, 182, 0.15), transparent 50%),
    radial-gradient(600px circle at 50% 100%, rgba(6, 182, 212, 0.12), transparent 50%);
}

a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease;
}

a:hover { color: var(--secondary); }

img { max-width: 100%; display: block; }

code, pre {
  font-family: var(--font-mono);
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
}

code {
  padding: 2px 8px;
  font-size: 0.88em;
  font-weight: 500;
  color: var(--primary-strong);
  border: 1px solid var(--border);
}

[data-theme="dark"] code { color: var(--primary); }

pre {
  padding: 1rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--border);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 1.8rem 0 0.9rem;
  color: var(--text);
}

h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 800; }
h2 { font-size: clamp(1.4rem, 3vw, 1.75rem); }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1rem; }

ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }

hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: 2.5rem 0;
}

::selection {
  background: var(--secondary);
  color: white;
}

/* ----- Layout ----- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  flex: 1;
  padding: 2rem 0 5rem;
}

/* ----- Header ----- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 255, 0.75);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  /* Dropdown menus escape clipping */
  overflow: visible;
}

[data-theme="dark"] .site-header {
  background: rgba(15, 10, 30, 0.75);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
  gap: 0.75rem;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand:hover { color: var(--text); text-decoration: none; }

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--grad-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: var(--shadow-glow);
  transform: rotate(-6deg);
  transition: transform 0.25s ease;
  font-family: var(--font-display);
}

.brand:hover .brand-mark {
  transform: rotate(0deg) scale(1.05);
}

.nav-links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  flex-wrap: nowrap;
  justify-content: flex-end;
  flex: 1;
  min-width: 0;
}

.nav-links > li {
  flex-shrink: 0;
}

.nav-links > li > a {
  display: inline-flex;
  align-items: center;
  color: var(--text-dim);
  padding: 0.5rem 0.72rem;
  border-radius: 10px;
  font-size: 0.87rem;
  font-weight: 600;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-links > li > a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-links > li > a.active {
  color: white;
  background: var(--grad-primary);
  box-shadow: var(--shadow-sm);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  font-size: 0.87rem;
  color: var(--text-dim);
  padding: 0.5rem 0.72rem;
  border-radius: 10px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-dropdown-btn:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-dropdown-chevron::after {
  content: "▾";
  display: inline-block;
  font-size: 0.72em;
  margin-left: 0.12rem;
  opacity: 0.75;
}

.nav-dropdown--open .nav-dropdown-chevron::after {
  opacity: 1;
}

.nav-dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 12rem;
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 120;
}

.nav-dropdown--end .nav-dropdown-menu {
  left: auto;
  right: 0;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dim);
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-dropdown-menu a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.nav-dropdown-menu a.active {
  color: white;
  background: var(--grad-primary);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 769px) {
  .nav-dropdown:hover .nav-dropdown-menu,
  .nav-dropdown:focus-within .nav-dropdown-menu,
  .nav-dropdown.nav-dropdown--open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-dropdown:hover > .nav-dropdown-btn,
  .nav-dropdown:focus-within > .nav-dropdown-btn,
  .nav-dropdown.nav-dropdown--open > .nav-dropdown-btn {
    color: var(--primary);
    background: var(--primary-soft);
  }
}

.nav-dropdown--active > .nav-dropdown-btn {
  color: var(--primary);
  background: var(--primary-soft);
}

/* Nested submenu (Belajar → Pasar Forex) */
.nav-dropdown-menu > li.nav-submenu {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-submenu-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 0.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-dim);
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease, color 0.15s ease;
  text-align: left;
}

.nav-submenu-trigger:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.nav-submenu-chevron::after {
  content: "▸";
  display: inline-block;
  font-size: 0.78em;
  opacity: 0.75;
  transition: transform 0.2s ease;
}

.nav-submenu.nav-submenu--open > .nav-submenu-trigger .nav-submenu-chevron::after {
  transform: rotate(90deg);
}

.nav-submenu-flyout li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-submenu-flyout {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  position: absolute;
  left: calc(100% + 2px);
  top: 0;
  min-width: 15.5rem;
  max-width: min(22rem, 85vw);
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 140;
}

.nav-submenu-flyout a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-dim);
  white-space: normal;
  line-height: 1.35;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-submenu-flyout a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.nav-submenu-flyout a.active {
  color: white;
  background: var(--grad-primary);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 769px) {
  .nav-submenu:hover .nav-submenu-flyout,
  .nav-submenu:focus-within .nav-submenu-flyout,
  .nav-submenu.nav-submenu--open .nav-submenu-flyout {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }

  .nav-submenu:hover > .nav-submenu-trigger,
  .nav-submenu:focus-within > .nav-submenu-trigger,
  .nav-submenu.nav-submenu--open > .nav-submenu-trigger {
    background: var(--primary-soft);
    color: var(--primary);
  }
}

.nav-submenu--active > .nav-submenu-trigger {
  color: var(--primary);
  background: var(--primary-soft);
}

/* Pinned items in dropdown (Belajar) */
.nav-dropdown-menu .nav-pinned-item > a {
  font-weight: 700;
  color: var(--primary);
  position: relative;
  padding-left: 1.85rem;
}

.nav-dropdown-menu .nav-pinned-item > a::before {
  content: "⭐";
  position: absolute;
  left: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  line-height: 1;
}

.nav-dropdown-menu .nav-pinned-item--pin > a::before {
  content: "📌";
}

.nav-dropdown-menu .nav-pinned-item > a:hover {
  background: var(--primary-soft);
}

.nav-dropdown-menu .nav-pinned-item--cta > a {
  margin: 0.15rem 0.25rem;
  padding: 0.55rem 0.85rem;
  background: var(--grad-primary);
  color: #fff;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.nav-dropdown-menu .nav-pinned-item--cta > a::before {
  content: "✨";
  position: static;
  transform: none;
  margin-right: 0.4rem;
  font-size: 0.9rem;
}

.nav-dropdown-menu .nav-pinned-item--cta > a:hover {
  background: var(--grad-primary);
  color: #fff;
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.nav-dropdown-menu .nav-divider {
  list-style: none;
  margin: 0.35rem 0.6rem;
  height: 1px;
  background: var(--border-soft, rgba(15, 23, 42, 0.1));
  padding: 0;
}

.nav-dropdown-menu .nav-section-label {
  list-style: none;
  padding: 0.35rem 0.85rem 0.2rem;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-mute, #94a3b8);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.nav-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
  font: inherit;
  font-size: 1rem;
  transition: all 0.18s ease;
}

.icon-btn:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
}

/* ----- Buttons ----- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.2rem;
  border-radius: 12px;
  background: var(--bg-elev);
  color: var(--text);
  border: 1.5px solid var(--border);
  cursor: pointer;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.18s ease;
  text-decoration: none;
}

.btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  color: white;
  border-color: transparent;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 36px rgba(236, 72, 153, 0.40);
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 1rem;
  border-radius: 14px;
}

/* ----- Hero ----- */

.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--secondary-soft), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--bg-elev);
  border: 1.5px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.2); }
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0 0 1.25rem;
  letter-spacing: -0.035em;
}

.hero h1 .grad {
  background: var(--grad-hero);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shift 8s ease-in-out infinite;
}

@keyframes shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto 2rem;
  font-weight: 500;
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.hero-stat {
  text-align: center;
}

.hero-stat .num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--text-mute);
  font-weight: 600;
  margin-top: 0.4rem;
}

/* ----- Cards / Grid ----- */

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: block;
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-primary);
  opacity: 0;
  transition: opacity 0.25s ease;
}

a.card:hover {
  border-color: transparent;
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: var(--text);
}

a.card:hover::before {
  opacity: 1;
}

.card h3 {
  margin: 0.75rem 0 0.5rem;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 700;
}

.card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0;
  font-weight: 500;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--grad-primary);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease;
}

.card-icon.cyan { background: var(--grad-cyan); }
.card-icon.lime { background: var(--grad-lime); }
.card-icon.amber { background: var(--grad-amber); }

a.card:hover .card-icon {
  transform: rotate(-8deg) scale(1.05);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-info { background: rgba(6, 182, 212, 0.12); color: var(--info); }
.badge-warn { background: rgba(245, 158, 11, 0.14); color: var(--accent-orange); }
.badge-danger { background: rgba(239, 68, 68, 0.12); color: var(--danger); }
.badge-success { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.badge-pink { background: var(--secondary-soft); color: var(--secondary); }

/* ----- Sections ----- */

.section { padding: 3rem 0; }
.section h2 { margin-top: 0; }
.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0 0 0.4rem;
}
.section-header p { margin: 0; color: var(--text-dim); font-size: 1rem; font-weight: 500; }

.section-emoji {
  display: inline-block;
  font-size: 1.4em;
  margin-right: 0.4rem;
}

/* ----- Lesson reading ----- */

.prose {
  max-width: 760px;
  margin: 0 auto;
}

.prose--wide {
  max-width: 1080px;
}

.prose h2 {
  margin-top: 3rem;
  font-size: 1.6rem;
  font-weight: 700;
}
.prose h3 {
  margin-top: 2rem;
  font-size: 1.2rem;
  color: var(--primary);
}
.prose blockquote {
  border-left: 4px solid var(--secondary);
  background: linear-gradient(90deg, var(--secondary-soft), transparent);
  margin: 1.75rem 0;
  padding: 1.1rem 1.4rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-weight: 500;
}
.prose blockquote p:last-child { margin: 0; }
.prose table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5rem 0;
  font-size: 0.93rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.prose th, .prose td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.prose th {
  background: var(--bg-soft);
  font-weight: 700;
  color: var(--text);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.prose tr:last-child td { border-bottom: none; }
.prose ul, .prose ol { line-height: 1.75; }
.prose strong { color: var(--text); font-weight: 700; }

/* Dark "mockup" container: chat screenshots, ASCII diagrams.
   Theme-agnostic — keeps a dark surface in both light & dark mode and
   forces light text + white strong so content stays readable. */
.mockup-dark {
  background: #1a1a1f;
  color: #e5e7eb;
  border-color: rgba(255, 255, 255, 0.08);
}
.mockup-dark strong,
.mockup-dark b,
.prose .mockup-dark strong,
.prose .mockup-dark b {
  color: #ffffff;
}
.mockup-dark a {
  color: #c4b5fd;
}

.lesson-meta {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  flex-wrap: wrap;
  color: var(--text-mute);
  font-size: 0.85rem;
  margin-bottom: 2rem;
  font-weight: 600;
}

.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1.5px solid var(--border);
  flex-wrap: wrap;
}
.lesson-nav a { flex: 1; min-width: 200px; }

/* ----- Forms / Inputs ----- */

.form-grid {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.field label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-dim);
}

.field input,
.field select {
  padding: 0.8rem 1rem;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.18s ease;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.field .hint {
  font-size: 0.78rem;
  color: var(--text-mute);
  font-weight: 500;
}

.result-box {
  background: var(--grad-primary);
  border: none;
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  margin-top: 1.5rem;
  color: white;
  box-shadow: var(--shadow-glow);
}

.result-box .result-label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.85);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.result-box .result-value {
  font-size: 1.9rem;
  font-weight: 800;
  font-family: var(--font-display);
  color: white;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.formula {
  background: var(--bg-soft);
  border-left: 3px solid var(--info);
  padding: 1rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.25rem 0;
  overflow-x: auto;
  line-height: 1.7;
}

.formula strong { color: var(--info); }

/* ----- Tables (data) ----- */

.table-wrap {
  overflow-x: auto;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

table.data th,
table.data td {
  padding: 0.85rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data th {
  background: var(--bg-soft);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

table.data tbody tr:hover { background: var(--bg-soft); }
table.data tbody tr:last-child td { border-bottom: none; }

.num { font-family: var(--font-mono); font-weight: 600; }
.up { color: var(--success); }
.down { color: var(--danger); }

/* ----- Glossary / Search ----- */

.search-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.search-bar input {
  flex: 1;
  min-width: 240px;
  padding: 0.95rem 1.2rem;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.18s ease;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.alpha-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 1.5rem;
}

.alpha-filter button {
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  color: var(--text-dim);
  padding: 0.4rem 0.7rem;
  font-size: 0.82rem;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  min-width: 36px;
  transition: all 0.15s ease;
  font-family: var(--font-display);
}

.alpha-filter button:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.alpha-filter button.active {
  background: var(--grad-primary);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.glossary-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.glossary-item {
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
  transition: all 0.18s ease;
}

.glossary-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.glossary-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glossary-item p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
}

.empty {
  text-align: center;
  color: var(--text-mute);
  padding: 2.5rem;
  font-weight: 500;
}

/* ----- Quiz ----- */

.quiz-progress {
  height: 8px;
  background: var(--bg-soft);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.quiz-progress > div {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 999px;
  transition: width 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 2px 8px var(--secondary-soft);
}

.question {
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.question h3 {
  margin: 0 0 1.25rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
}

.options { display: grid; gap: 0.7rem; }

.option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  border: 1.5px solid var(--border);
  background: var(--bg-elev);
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.18s ease;
  font-weight: 500;
}

.option:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateX(2px);
}

.option.selected {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.option.correct {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.10);
  color: var(--success);
  font-weight: 700;
}

.option.wrong {
  border-color: var(--danger);
  background: rgba(239, 68, 68, 0.10);
  color: var(--danger);
}

.option input { margin: 0; accent-color: var(--primary); }

.quiz-actions {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.quiz-result {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.quiz-result .score {
  font-size: 4rem;
  font-weight: 800;
  font-family: var(--font-display);
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0.5rem 0;
  letter-spacing: -0.04em;
}

.explanation {
  margin-top: 1.25rem;
  padding: 1rem 1.2rem;
  background: var(--bg-soft);
  border-left: 3px solid var(--info);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.explanation strong { color: var(--info); }

/* ----- Footer ----- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 2.5rem 0;
  margin-top: 4rem;
  font-size: 0.92rem;
  color: var(--text-mute);
  text-align: center;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

.site-footer a { color: var(--text-dim); }
.site-footer a:hover { color: var(--primary); }

.site-footer strong {
  font-family: var(--font-display);
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  justify-content: center;
  align-items: center;
  margin: 0 0 1rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.footer-links a {
  color: var(--text-dim);
}

.footer-links a:hover {
  color: var(--primary);
}

.disclaimer {
  font-size: 0.82rem;
  color: var(--text-mute);
  max-width: 720px;
  text-align: center;
  margin: 0 auto;
  line-height: 1.7;
}

/* ----- FAQ (native details) ----- */
.faq-list {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.faq-item {
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--text);
  padding: 1rem 1.15rem;
  padding-right: 2.25rem;
  position: relative;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 800;
  color: var(--primary);
  font-size: 1.1rem;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: var(--primary-soft);
}

.faq-item p {
  margin: 0;
  padding: 0 1.15rem 1.1rem;
  color: var(--text-dim);
  font-size: 0.98rem;
  line-height: 1.7;
}

.faq-item p strong {
  color: var(--text);
}

/* ----- Platforms: download cards ----- */
/* ----- Brokers education ----- */
.broker-disclaimer {
  border-color: rgba(245, 158, 11, 0.45);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(124, 58, 237, 0.06));
  margin-bottom: 2rem;
}

[data-theme="dark"] .broker-disclaimer {
  border-color: rgba(245, 158, 11, 0.35);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(167, 139, 250, 0.08));
}

.broker-signup-cta {
  margin-top: 1.5rem;
  border-color: rgba(124, 58, 237, 0.35);
  background: linear-gradient(145deg, rgba(124, 58, 237, 0.07), rgba(236, 72, 153, 0.06));
}

[data-theme="dark"] .broker-signup-cta {
  border-color: rgba(167, 139, 250, 0.35);
  background: linear-gradient(145deg, rgba(167, 139, 250, 0.1), rgba(244, 114, 182, 0.06));
}

.platform-download-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.platform-download-card {
  padding: 1.5rem 1.5rem 1.25rem;
}

.platform-download-rows {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.platform-download-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
}

.platform-download-row--stores {
  align-items: flex-start;
}

.platform-download-row:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.store-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.85rem;
}

.store-badge-link {
  display: inline-block;
  line-height: 0;
  border-radius: 8px;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.store-badge-link:hover {
  transform: translateY(-2px);
  opacity: 0.92;
}

.store-badge-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.store-badge-img {
  display: block;
  height: auto;
  vertical-align: middle;
}

/* Ukuran kompak agar selaras dengan baris desktop; tetap terbaca */
.store-badge-img--google {
  height: 38px;
  width: auto;
}

.store-badge-img--apple {
  height: 32px;
  width: auto;
}

@media (min-width: 769px) {
  .store-badge-img--google {
    height: 40px;
  }
  .store-badge-img--apple {
    height: 34px;
  }
}

.platform-download-label {
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
  min-width: 8.5rem;
}

.btn-platform-dl {
  min-width: 8.5rem;
  text-align: center;
  flex-shrink: 0;
}

.platform-download-foot {
  margin: 1.1rem 0 0;
  font-size: 0.88rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

/* ----- Lessons index (/lessons/) ----- */

.lessons-page-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  margin: 0 0 2rem;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 90% 70% at 92% 8%, rgba(167, 139, 250, 0.28), transparent 52%),
    radial-gradient(ellipse 70% 50% at 4% 92%, rgba(236, 72, 153, 0.14), transparent 48%),
    var(--bg-soft);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.lessons-page-hero::after {
  content: "";
  position: absolute;
  inset: -40% 55% auto -20%;
  height: 120%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06), transparent 68%);
  pointer-events: none;
}

.lessons-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: stretch;
}

.lessons-hero-main {
  min-width: 0;
}

.lessons-page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 0.65rem;
  line-height: 1.15;
  color: var(--text);
}

.lessons-page-hero .lessons-hero-lead {
  font-size: 1.02rem;
  color: var(--text-dim);
  max-width: 38rem;
  margin: 0 0 1.5rem;
  line-height: 1.62;
}

.lessons-hero-nav {
  margin-bottom: 1.5rem;
}

.lessons-hero-nav-label,
.lessons-hero-tools-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 0.55rem;
}

.lessons-level-segmented {
  display: flex;
  border-radius: 14px;
  padding: 5px;
  gap: 5px;
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.lessons-seg {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  padding: 0.72rem 0.5rem;
  border-radius: 11px;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-dim);
  border: 1.5px solid transparent;
  background: transparent;
  text-decoration: none;
  transition:
    background 0.22s ease,
    border-color 0.22s ease,
    color 0.22s ease,
    transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.22s ease;
}

.lessons-seg-emoji {
  font-size: 1.35rem;
  line-height: 1;
  transition: transform 0.22s ease;
}

.lessons-seg:hover {
  text-decoration: none;
  color: var(--text);
  background: var(--bg-soft);
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.lessons-seg:hover .lessons-seg-emoji {
  transform: scale(1.12);
}

.lessons-seg:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.lessons-seg--basic:hover {
  border-color: rgba(16, 185, 129, 0.45);
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.lessons-seg--mid:hover {
  border-color: rgba(6, 182, 212, 0.45);
  background: rgba(6, 182, 212, 0.1);
  color: var(--info);
}

.lessons-seg--adv:hover {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-orange);
}

.lessons-hero-nav-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  margin-top: 0.65rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-mute);
}

.lessons-hero-nav-meta a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.15s ease;
}

.lessons-hero-nav-meta a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.lessons-hero-tools-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.lessons-tool-btn {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.85rem;
  border-radius: 14px;
  border: 1.5px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  text-decoration: none;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.2s ease;
}

.lessons-tool-btn:hover {
  border-color: rgba(124, 58, 237, 0.45);
  background: var(--primary-soft);
  text-decoration: none;
  color: var(--text);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.lessons-tool-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.lessons-tool-icon {
  font-size: 1.45rem;
  line-height: 1;
  flex-shrink: 0;
}

.lessons-tool-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  min-width: 0;
  text-align: left;
}

.lessons-tool-text strong {
  font-size: 0.92rem;
  font-weight: 800;
}

.lessons-tool-text small {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-mute);
  line-height: 1.25;
}

.lessons-hero-aside {
  display: flex;
  align-items: stretch;
}

.lessons-hero-aside-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.lessons-page-hero:hover .lessons-hero-aside-card {
  border-color: rgba(124, 58, 237, 0.22);
}

.lessons-aside-title {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-mute);
}

.lessons-aside-list {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.93rem;
  color: var(--text-dim);
  line-height: 1.65;
  flex: 1;
}

.lessons-aside-list strong {
  color: var(--primary);
  font-weight: 800;
}

.lessons-aside-cta {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease, transform 0.2s ease;
}

.lessons-aside-cta:hover {
  color: var(--secondary);
  text-decoration: none;
  transform: translateX(4px);
}

.lessons-level-card {
  display: flex;
  flex-direction: column;
  min-height: 230px;
}

.lessons-level-card .lessons-level-cta {
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
}

.lessons-tracks-intro {
  margin-bottom: 1.25rem;
}

.lessons-track {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 0.65rem;
  background: var(--bg-elev);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.lessons-track:hover {
  border-color: rgba(124, 58, 237, 0.35);
}

.lessons-track[open] {
  box-shadow: var(--shadow);
}

.lessons-track summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  user-select: none;
}

.lessons-track summary::-webkit-details-marker {
  display: none;
}

.lessons-track summary .lessons-track-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lessons-track summary .lessons-track-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.lessons-track summary .lessons-track-chevron {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: var(--bg-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lessons-track[open] summary .lessons-track-chevron {
  transform: rotate(45deg);
}

.lessons-track-body {
  padding: 0 1.15rem 1.15rem;
  border-top: 1px solid var(--border);
}

.lessons-track-body > p {
  margin: 0.85rem 0;
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.lessons-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

a.lessons-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid transparent;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

a.lessons-chip:hover {
  border-color: var(--primary);
  text-decoration: none;
  color: var(--primary);
  transform: translateY(-1px);
}

#level-dasar,
#level-menengah,
#level-lanjutan {
  scroll-margin-top: 5.5rem;
}

@media (max-width: 900px) {
  .lessons-hero-grid {
    grid-template-columns: 1fr;
  }

  .lessons-hero-aside {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .lessons-hero-tools-row {
    grid-template-columns: 1fr;
  }

  .lessons-level-segmented {
    flex-direction: column;
  }

  .lessons-seg {
    flex-direction: row;
    justify-content: flex-start;
    padding: 0.65rem 0.85rem;
    gap: 0.65rem;
  }

  .lessons-seg-emoji {
    font-size: 1.25rem;
  }
}

/* ----- Responsive ----- */

@media (max-width: 768px) {
  .nav { padding: 0.75rem 1rem; flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0.5rem;
    right: 0.5rem;
    background: var(--bg-elev);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    padding: 0.5rem;
    gap: 0.2rem;
    margin-top: 0.5rem;
    max-height: min(70vh, 520px);
    overflow-y: auto;
  }
  .nav-links.open { display: flex; }
  .nav-links > li {
    width: 100%;
    flex-shrink: 0;
  }
  .nav-links > li > a {
    width: 100%;
    padding: 0.85rem 1rem;
    justify-content: flex-start;
  }
  .nav-dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    box-shadow: none;
    border: none;
    background: var(--bg-soft);
    padding: 0.25rem 0.35rem 0.5rem 0.75rem;
    margin: 0.15rem 0 0.35rem;
    min-width: 0;
    border-radius: var(--radius-sm);
  }
  .nav-dropdown--open .nav-dropdown-menu {
    display: block;
  }
  .nav-dropdown-btn {
    width: 100%;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
  }
  .nav-dropdown-menu a {
    white-space: normal;
    padding: 0.65rem 0.85rem;
  }

  .nav-submenu-trigger {
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
  }

  .nav-submenu-flyout {
    position: static;
    left: auto;
    top: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0.15rem 0 0.35rem 0.65rem;
    margin: 0;
    min-width: 0;
    max-width: none;
  }

  .nav-submenu.nav-submenu--open .nav-submenu-flyout {
    display: block;
  }

  .nav-submenu-flyout a {
    font-size: 0.88rem;
    padding: 0.55rem 0.75rem;
  }

  .hero { padding: 3rem 0 2rem; }
  .hero-stats { gap: 1.5rem; padding-top: 1.75rem; margin-top: 2rem; }
  .hero-stat .num { font-size: 1.6rem; }
  .container { padding: 0 1rem; }
  .lesson-nav a { min-width: 100%; }
  .card { padding: 1.4rem; }
  .quiz-result .score { font-size: 3rem; }
  .platform-download-row:not(.platform-download-row--stores) {
    flex-direction: column;
    align-items: stretch;
  }
  .platform-download-row:not(.platform-download-row--stores) .btn-platform-dl {
    width: 100%;
    justify-content: center;
  }
  .platform-download-row--stores .store-badge-row {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  .store-badge-img--google {
    height: auto;
    width: min(100%, 158px);
    max-height: 40px;
  }
  .store-badge-img--apple {
    height: auto;
    width: min(100%, 116px);
    max-height: 34px;
  }
}

/* ----- Utilities ----- */
.text-dim { color: var(--text-dim); }
.text-mute { color: var(--text-mute); }
.text-center { text-align: center; }
.text-grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 1rem; }
.flex { display: flex; }
.gap-2 { gap: 1rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }