/* ==========================================================================
   LARE Prep — ASLA Design System
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap");

/* -- Webfonts ------------------------------------------------------------ */
@font-face { font-family:"Retina"; src:url("../fonts/Retina-ExLight.otf") format("opentype"); font-weight:200; font-style:normal; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-Light.otf") format("opentype"); font-weight:300; font-style:normal; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-LightItalic.otf") format("opentype"); font-weight:300; font-style:italic; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-Book.otf") format("opentype"); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-BookItalic.otf") format("opentype"); font-weight:400; font-style:italic; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-Bold.otf") format("opentype"); font-weight:700; font-style:normal; font-display:swap; }
@font-face { font-family:"Retina"; src:url("../fonts/Retina-BoldItalic.otf") format("opentype"); font-weight:700; font-style:italic; font-display:swap; }
@font-face { font-family:"Retina Condensed"; src:url("../fonts/RetinaCondensedLight.otf") format("opentype"); font-weight:300; font-style:normal; font-display:swap; }
@font-face { font-family:"Retina Condensed"; src:url("../fonts/RetinaCond-Bold.otf") format("opentype"); font-weight:700; font-style:normal; font-display:swap; }
@font-face { font-family:"Skolar"; src:url("../fonts/SkolarLatin-Light.otf") format("opentype"); font-weight:300; font-style:normal; font-display:swap; }
@font-face { font-family:"Skolar"; src:url("../fonts/SkolarLatin-Regular.otf") format("opentype"); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:"Skolar"; src:url("../fonts/SkolarLatin-Italic.otf") format("opentype"); font-weight:400; font-style:italic; font-display:swap; }
@font-face { font-family:"Skolar"; src:url("../fonts/SkolarLatin-Bold.otf") format("opentype"); font-weight:700; font-style:normal; font-display:swap; }

:root {
  --asla-teal:        #003A49;
  --asla-teal-light:  #0D4D5C;
  --asla-teal-hover:  #004D5E;
  --asla-green:       #81BC00;
  --asla-green-light: #95D600;
  --asla-green-dark:  #6B9E00;

  --warm-cream:       #F4F2ED;
  --soft-sage:        #E7EDDA;
  --sand:             #D4CFC1;
  --white:            #FFFFFF;

  --charcoal:         #2D2D2D;
  --dark-gray:        #4A4A4A;
  --border-gray:      #D0D0D0;
  --grid-gray:        #E0E0E0;
  --placeholder-gray: #9E9E9E;

  --alert-red:        #E53935;
  --muted-gold:       #C9A227;
  --success-green:    #28A745;

  --font-sans:      "Retina", "Proxima Nova", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-condensed: "Retina Condensed", "Retina", -apple-system, sans-serif;
  --font-serif:     "Skolar", Georgia, "Times New Roman", serif;
  --font-mono:      "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --shadow-subtle: 0 2px 8px rgba(0,0,0,.05);
  --shadow-card:   0 4px 16px rgba(0,0,0,.08);
  --shadow-hover:  0 8px 24px rgba(0,0,0,.10);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 24px;

  --content-max: 1200px;
  --ease-out: cubic-bezier(.2,.8,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--warm-cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--asla-teal); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--asla-teal-light); }

img { max-width: 100%; height: auto; }

/* -- Layout -------------------------------------------------------------- */
.container { max-width: var(--content-max); margin: 0 auto; padding: 0 24px; }

/* -- Header -------------------------------------------------------------- */
.site-header {
  background: var(--warm-cream);
  border-bottom: 1px solid rgba(0,0,0,.06);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.header-logo { height: 38px; width: auto; }
.header-nav { display: flex; gap: 6px; align-items: center; }
.header-nav a {
  color: var(--charcoal);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: background .15s var(--ease-out), color .15s var(--ease-out);
}
.header-nav a:hover,
.header-nav a.active {
  background: var(--asla-teal);
  color: var(--white);
}
.header-nav a.active { font-weight: 600; }

/* Nav dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
  color: var(--charcoal);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background .15s var(--ease-out), color .15s var(--ease-out);
}
.nav-dropdown-trigger:hover,
.nav-dropdown.open .nav-dropdown-trigger {
  background: var(--asla-teal);
  color: var(--white);
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
  min-width: 280px;
  padding: 8px;
  z-index: 200;
  border: 1px solid var(--grid-gray);
}
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--charcoal);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background .1s;
}
.nav-dropdown-menu a:hover {
  background: var(--warm-cream);
  color: var(--asla-teal);
}

/* Auth area in header */
.auth-area {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
}
.auth-area .user-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--asla-teal);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.auth-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: none;
  transition: all .15s var(--ease-out);
}
.auth-btn-signin {
  background: var(--asla-green);
  color: var(--white);
}
.auth-btn-signin:hover { background: var(--asla-green-dark); }
.auth-btn-signout {
  background: transparent;
  color: var(--dark-gray);
  border: 1px solid var(--border-gray);
  font-weight: 500;
  padding: 6px 14px;
  font-size: 12px;
}
.auth-btn-signout:hover { border-color: var(--asla-teal); color: var(--asla-teal); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}
.modal-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  max-width: 420px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
  animation: fadeIn .2s ease-out;
}
.modal-card h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--asla-teal);
  margin-bottom: 4px;
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--placeholder-gray);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.modal-close:hover { background: var(--warm-cream); color: var(--charcoal); }

/* Auth form */
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form input {
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 12px 16px;
  border: 2px solid var(--grid-gray);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--charcoal);
  outline: none;
  transition: border-color .15s;
}
.auth-form input:focus { border-color: var(--asla-teal); }
.auth-error {
  font-size: 13px;
  color: var(--alert-red);
  min-height: 18px;
}
.auth-toggle {
  text-align: center;
  font-size: 13px;
  color: var(--dark-gray);
  margin-top: 8px;
}
.auth-toggle a { cursor: pointer; color: var(--asla-teal); font-weight: 500; }
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--placeholder-gray);
  font-size: 12px;
  margin: 4px 0;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--grid-gray);
}
.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px;
  border: 2px solid var(--grid-gray);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--charcoal);
  cursor: pointer;
  transition: border-color .15s;
}
.google-btn:hover { border-color: var(--asla-teal); }

.asla-sso-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px;
  border: 2px solid var(--asla-teal);
  border-radius: var(--radius-sm);
  background: var(--asla-teal);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  cursor: pointer;
  transition: opacity .15s;
  margin-bottom: 8px;
}
.asla-sso-btn img { filter: brightness(0) invert(1); }
.asla-sso-btn:hover { opacity: .9; }

/* -- Hero ---------------------------------------------------------------- */
.hero {
  background: var(--warm-cream);
  padding: 72px 24px 96px;
}
.hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-eyebrow {
  font-family: var(--font-condensed);
  font-size: 12px;
  font-weight: 700;
  color: var(--dark-gray);
  text-transform: uppercase;
  letter-spacing: .14em;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(36px, 4.5vw, 54px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--charcoal);
  margin-bottom: 20px;
}
.hero h1 strong { font-weight: 600; }
.hero p {
  font-size: 18px;
  line-height: 1.55;
  color: var(--dark-gray);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-mosaic {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto;
  gap: 12px;
}
.hero-mosaic .big   { grid-column: 1/3; aspect-ratio: 16/9; border-radius: 0 24px 24px 0; }
.hero-mosaic .small1 { aspect-ratio: 4/3; border-radius: 0 24px 0 0; }
.hero-mosaic .small2 { aspect-ratio: 4/3; border-radius: 24px 0 0 0; }
.mosaic-tile {
  position: relative;
  overflow: hidden;
}
.mosaic-tile.teal-grad  { background: linear-gradient(135deg, #6B8BA3, #003A49); }
.mosaic-tile.sage-grad  { background: linear-gradient(135deg, #E7EDDA, #81BC00); }
.mosaic-tile.green-grad { background: linear-gradient(135deg, #81BC00, #003A49); }

/* -- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  padding: 13px 26px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all .2s var(--ease-out);
  text-decoration: none;
  line-height: 1;
}
.btn-primary {
  background: var(--asla-teal);
  color: var(--white);
  border-color: var(--asla-teal);
}
.btn-primary:hover {
  background: var(--asla-teal-hover);
  border-color: var(--asla-teal-hover);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}
.btn-secondary {
  background: transparent;
  color: var(--asla-teal);
  border-color: var(--asla-teal);
}
.btn-secondary:hover {
  background: var(--asla-teal);
  color: var(--white);
  transform: translateY(-1px);
}
.btn-green {
  background: var(--asla-green);
  color: var(--white);
  border-color: var(--asla-green);
}
.btn-green:hover {
  background: var(--asla-green-dark);
  border-color: var(--asla-green-dark);
  color: var(--white);
}
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }

/* -- Section Cards (landing page) ---------------------------------------- */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.section-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-subtle);
  transition: transform .2s var(--ease-out), box-shadow .2s var(--ease-out);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border: 1px solid transparent;
}
.section-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--asla-green);
  color: inherit;
}
.section-card .card-num {
  font-family: var(--font-condensed);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--asla-green);
  margin-bottom: 12px;
}
.section-card h3 {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  color: var(--asla-teal);
  margin-bottom: 10px;
  letter-spacing: -.005em;
}
.section-card p {
  font-size: 14px;
  color: var(--dark-gray);
  line-height: 1.55;
  flex: 1;
}
.card-meta {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--grid-gray);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.card-meta span {
  font-size: 12px;
  color: var(--placeholder-gray);
  font-weight: 500;
}

/* -- Stats Band ---------------------------------------------------------- */
.stats-band {
  background: var(--asla-teal);
  padding: 56px 24px;
}
.stats-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat {
  text-align: left;
  border-left: 1px solid rgba(255,255,255,.18);
  padding-left: 32px;
}
.stat:first-child { border-left: none; padding-left: 0; }
.stat-num {
  font-size: 48px;
  font-weight: 600;
  color: var(--asla-green);
  letter-spacing: -.03em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,.85);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* -- Content Pages ------------------------------------------------------- */
.page-header {
  background: var(--asla-teal);
  padding: 48px 24px;
  color: var(--white);
}
.page-header h1 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 300;
  letter-spacing: -.015em;
  margin-bottom: 8px;
  line-height: 1.15;
}
.page-header h1 strong { font-weight: 600; }
.page-header .subtitle {
  font-size: 16px;
  color: rgba(255,255,255,.75);
  font-weight: 400;
}

/* Content type tabs */
.content-tabs {
  background: var(--white);
  border-bottom: 1px solid var(--grid-gray);
  position: sticky;
  top: 72px;
  z-index: 90;
}
.content-tabs-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 0;
}
.content-tab {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--dark-gray);
  padding: 16px 24px;
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: color .15s, border-color .15s;
}
.content-tab:hover { color: var(--asla-teal); }
.content-tab.active {
  color: var(--asla-teal);
  border-bottom-color: var(--asla-green);
  font-weight: 600;
}

/* -- Study Content ------------------------------------------------------- */
.content-area {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
.content-area h2 {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  color: var(--asla-teal);
  margin: 48px 0 16px;
  letter-spacing: -.01em;
  line-height: 1.2;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--asla-green);
}
.content-area h2:first-child { margin-top: 0; }

.content-area h3 {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 600;
  color: var(--asla-teal-light);
  margin: 36px 0 12px;
  line-height: 1.3;
}

.content-area h4 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--charcoal);
  margin: 28px 0 10px;
  line-height: 1.3;
}

.content-area p {
  margin-bottom: 14px;
  line-height: 1.65;
  color: var(--charcoal);
}
.content-area p.serif {
  font-family: var(--font-serif);
  line-height: 1.55;
}

.content-area ul { list-style: none; padding: 0; margin: 0 0 16px; }
.content-area ul li {
  padding: 5px 0 5px 22px;
  position: relative;
  line-height: 1.55;
}
.content-area ul li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--asla-green);
}
.content-area ul li.sub {
  padding-left: 42px;
  font-size: 15px;
  color: var(--dark-gray);
}
.content-area ul li.sub::before {
  left: 28px;
  width: 5px;
  height: 5px;
  background: var(--sand);
}

/* -- Tables -------------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--grid-gray);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.5;
}
.data-table th {
  background: var(--asla-teal);
  color: var(--white);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 12px 16px;
  text-align: left;
  white-space: nowrap;
}
.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--grid-gray);
  color: var(--charcoal);
}
.data-table tbody tr:nth-child(even) { background: var(--warm-cream); }
.data-table tbody tr:hover { background: rgba(0,58,73,.04); }

/* -- Callout boxes ------------------------------------------------------- */
.callout {
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
  font-size: 15px;
  line-height: 1.55;
}
.callout-title {
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.callout.tip {
  background: #E8F4F8;
  border-left: 4px solid var(--asla-teal);
}
.callout.tip .callout-title { color: var(--asla-teal); }

.callout.memory {
  background: var(--soft-sage);
  border-left: 4px solid var(--asla-green);
}
.callout.memory .callout-title { color: var(--asla-green-dark); }

.callout.example {
  background: #FEF9F0;
  border-left: 4px solid var(--muted-gold);
}
.callout.example .callout-title { color: var(--muted-gold); }

.callout.summary {
  background: var(--white);
  border: 2px solid var(--asla-teal);
  border-radius: var(--radius-md);
}
.callout.summary .callout-title { color: var(--asla-teal); }

/* -- Table of Contents sidebar ------------------------------------------- */
.study-layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 24px 96px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
}
.toc {
  position: sticky;
  top: 140px;
  align-self: start;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  padding-right: 16px;
}
.toc h4 {
  font-family: var(--font-condensed);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--asla-green);
  margin-bottom: 16px;
}
.toc a {
  display: block;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--dark-gray);
  text-decoration: none;
  border-radius: 6px;
  border-left: 2px solid transparent;
  transition: all .15s var(--ease-out);
  line-height: 1.4;
  margin-bottom: 2px;
}
.toc a:hover {
  color: var(--asla-teal);
  background: rgba(0,58,73,.04);
}
.toc a.active {
  color: var(--asla-teal);
  border-left-color: var(--asla-green);
  font-weight: 600;
  background: rgba(0,58,73,.04);
}
.toc a.sub {
  padding-left: 24px;
  font-size: 12px;
}

/* -- Progress Bar -------------------------------------------------------- */
.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--grid-gray);
  border-radius: 2px;
  overflow: hidden;
  margin: 16px 0;
}
.progress-fill {
  height: 100%;
  background: var(--asla-green);
  border-radius: 2px;
  transition: width .4s var(--ease-out);
}

/* -- Quiz / Practice Exam ------------------------------------------------ */
.quiz-container { max-width: 800px; margin: 0 auto; padding: 48px 24px 96px; }

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}
.quiz-progress-text {
  font-size: 14px;
  color: var(--dark-gray);
  font-weight: 500;
}
.quiz-score {
  font-family: var(--font-condensed);
  font-size: 14px;
  font-weight: 700;
  color: var(--asla-teal);
  letter-spacing: .05em;
}

.question-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 24px;
}
.question-num {
  font-family: var(--font-condensed);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--asla-green);
  margin-bottom: 12px;
}
.question-text {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--charcoal);
  margin-bottom: 24px;
}

.choices { list-style: none; padding: 0; margin: 0; }
.choice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  margin-bottom: 8px;
  border: 2px solid var(--grid-gray);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color .15s var(--ease-out), background .15s var(--ease-out);
  font-size: 15px;
  line-height: 1.5;
}
.choice:hover { border-color: var(--asla-teal); background: rgba(0,58,73,.02); }

.choice-letter {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--warm-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--asla-teal);
  transition: background .15s, color .15s;
}

.choice.selected { border-color: var(--asla-teal); background: rgba(0,58,73,.04); }
.choice.selected .choice-letter { background: var(--asla-teal); color: var(--white); }

.choice.correct { border-color: var(--success-green); background: rgba(40,167,69,.06); }
.choice.correct .choice-letter { background: var(--success-green); color: var(--white); }

.choice.incorrect { border-color: var(--alert-red); background: rgba(229,57,53,.04); }
.choice.incorrect .choice-letter { background: var(--alert-red); color: var(--white); }

.choice.disabled { pointer-events: none; opacity: .85; }
.choice.show-correct { border-color: var(--success-green); }
.choice.show-correct .choice-letter { background: var(--success-green); color: var(--white); }

.explanation {
  margin-top: 20px;
  padding: 18px 22px;
  background: var(--soft-sage);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.55;
  color: var(--charcoal);
  border-left: 4px solid var(--asla-green);
}
.explanation strong { color: var(--asla-teal); }

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  gap: 16px;
}

/* Quiz results */
.results-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
  text-align: center;
}
.results-score {
  font-size: 72px;
  font-weight: 300;
  color: var(--asla-teal);
  line-height: 1;
  margin-bottom: 8px;
}
.results-label {
  font-size: 16px;
  color: var(--dark-gray);
  margin-bottom: 24px;
}
.results-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0;
  text-align: center;
}
.results-stat {
  padding: 16px;
  background: var(--warm-cream);
  border-radius: var(--radius-sm);
}
.results-stat .num {
  font-size: 28px;
  font-weight: 600;
  color: var(--asla-teal);
}
.results-stat .lab {
  font-size: 12px;
  color: var(--dark-gray);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-top: 4px;
}

/* Question dots navigator */
.question-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin: 24px 0;
}
.q-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--grid-gray);
  background: var(--white);
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .15s var(--ease-out);
  color: var(--dark-gray);
}
.q-dot:hover { border-color: var(--asla-teal); }
.q-dot.current { border-color: var(--asla-teal); background: var(--asla-teal); color: var(--white); }
.q-dot.answered { border-color: var(--asla-green); background: var(--soft-sage); color: var(--asla-green-dark); }
.q-dot.correct-dot { background: var(--success-green); border-color: var(--success-green); color: var(--white); }
.q-dot.incorrect-dot { background: var(--alert-red); border-color: var(--alert-red); color: var(--white); }

/* -- Footer -------------------------------------------------------------- */
.site-footer {
  background: var(--asla-teal);
  color: var(--white);
  padding: 56px 24px 28px;
}
.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand img { height: 38px; margin-bottom: 16px; }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  line-height: 1.6;
  max-width: 280px;
}
.footer-col h5 {
  font-family: var(--font-condensed);
  font-size: 11px;
  font-weight: 700;
  color: var(--asla-green);
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  color: rgba(255,255,255,.8);
  text-decoration: none;
  font-size: 14px;
  transition: color .15s;
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 20px;
  font-size: 12px;
  color: rgba(255,255,255,.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* -- Mode toggle --------------------------------------------------------- */
.mode-toggle {
  display: flex;
  background: var(--warm-cream);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 2px;
}
.mode-toggle button {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--dark-gray);
  cursor: pointer;
  transition: all .15s var(--ease-out);
}
.mode-toggle button.active {
  background: var(--white);
  color: var(--asla-teal);
  box-shadow: var(--shadow-subtle);
  font-weight: 600;
}

/* -- Search -------------------------------------------------------------- */
.search-box {
  position: relative;
  max-width: 400px;
}
.search-box input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 12px 16px 12px 44px;
  border: 2px solid var(--grid-gray);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--charcoal);
  outline: none;
  transition: border-color .15s;
}
.search-box input:focus { border-color: var(--asla-teal); }
.search-box input::placeholder { color: var(--placeholder-gray); }
.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--placeholder-gray);
}

/* -- Dashboard progress -------------------------------------------------- */
.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.progress-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-subtle);
}
.progress-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--asla-teal);
  margin-bottom: 4px;
}
.progress-card .pct {
  font-size: 32px;
  font-weight: 300;
  color: var(--charcoal);
  margin: 8px 0;
}

/* -- Responsive ---------------------------------------------------------- */
/* -- How It Works grid --------------------------------------------------- */
.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: left;
}

/* -- Dashboard stats grid ------------------------------------------------ */
.dashboard-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

/* -- Mobile menu button -------------------------------------------------- */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--charcoal);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background .15s;
}
.mobile-menu-btn:hover { background: rgba(0,0,0,.05); }

/* -- Mobile nav overlay -------------------------------------------------- */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 998;
}
.mobile-nav-overlay.open { display: block; }

@media (max-width: 1024px) {
  .study-layout { grid-template-columns: 1fr; }
  .toc { position: static; max-height: none; padding: 24px; background: var(--white); border-radius: var(--radius-md); margin-bottom: 32px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-mosaic { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }

  .header-nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--white);
    box-shadow: -4px 0 24px rgba(0,0,0,.12);
    z-index: 999;
    padding: 24px;
    gap: 4px;
    transition: right .3s var(--ease-out);
    overflow-y: auto;
  }
  .header-nav.open { right: 0; }

  .header-nav a {
    font-size: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    width: 100%;
  }
  .header-nav a:hover,
  .header-nav a.active {
    background: var(--soft-sage);
    color: var(--asla-teal);
  }

  .nav-dropdown { width: 100%; }
  .nav-dropdown-trigger {
    width: 100%;
    font-size: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    justify-content: space-between;
  }
  .nav-dropdown-trigger:hover,
  .nav-dropdown.open .nav-dropdown-trigger {
    background: var(--soft-sage);
    color: var(--asla-teal);
  }
  .nav-dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    min-width: 0;
    padding: 0 0 0 12px;
    background: transparent;
  }
  .nav-dropdown-menu a {
    font-size: 15px;
    padding: 10px 16px;
  }

  .auth-area {
    margin-top: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--grid-gray);
    width: 100%;
    justify-content: flex-start;
  }
  .auth-btn { width: 100%; text-align: center; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: none; padding-left: 0; }
  .sections-grid { grid-template-columns: 1fr; }
  .results-breakdown { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .question-card { padding: 24px 20px; }
  .progress-grid { grid-template-columns: 1fr; }

  .page-header h1 { font-size: 28px; }
  .page-header .subtitle { font-size: 15px; }

  .flashcard-face { padding: 28px 20px; }
  .flashcard-text { font-size: 16px; }
  .flashcard-detail { font-size: 13px; }

  .how-it-works-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-stats-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .content-tab { padding: 14px 14px; font-size: 13px; }
  .explore-bar-inner { gap: 4px; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 15px; }
  .download-row { padding: 12px 16px; }
  .how-it-works-grid { grid-template-columns: 1fr; }
  .dashboard-stats-grid { grid-template-columns: 1fr; }
}

/* -- Flashcards ---------------------------------------------------------- */
.flash-container { max-width: 800px; margin: 0 auto; padding: 48px 24px 96px; }
.flash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}
.flash-counter {
  font-size: 14px;
  color: var(--dark-gray);
  font-weight: 500;
}

.flashcard-wrapper {
  perspective: 1000px;
  margin-bottom: 24px;
}
.flashcard {
  position: relative;
  min-height: 280px;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform .5s var(--ease-out);
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.flashcard-front {
  background: var(--white);
  border: 2px solid var(--grid-gray);
}
.flashcard-back {
  background: var(--asla-teal);
  color: var(--white);
  transform: rotateY(180deg);
}
.flashcard-label {
  font-family: var(--font-condensed);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  margin-bottom: 16px;
}
.flashcard-front .flashcard-label { color: var(--asla-green); }
.flashcard-back .flashcard-label { color: var(--asla-green-light); }
.flashcard-text {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.5;
  max-width: 600px;
}
.flashcard-detail {
  font-size: 14px;
  line-height: 1.5;
  margin-top: 16px;
  opacity: .85;
  max-width: 600px;
}
.flash-hint {
  text-align: center;
  font-size: 13px;
  color: var(--placeholder-gray);
  margin-bottom: 24px;
}
.flash-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.flash-dots {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
}
.flash-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grid-gray);
  transition: background .15s;
}
.flash-dot.current { background: var(--asla-green); transform: scale(1.3); }
.flash-dot.seen { background: var(--sand); }

/* Flashcard print grid */
.flash-print-grid {
  display: none;
}
@media print {
  .flash-print-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 16px;
  }
  .flash-print-card {
    border: 2px solid #003A49;
    border-radius: 8px;
    padding: 20px;
    page-break-inside: avoid;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .flash-print-card .fp-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: #81BC00;
    margin-bottom: 8px;
  }
  .flash-print-card .fp-front {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #D0D0D0;
  }
  .flash-print-card .fp-back {
    font-size: 12px;
    color: #4A4A4A;
    line-height: 1.4;
  }
  .flash-container, .flashcard-wrapper, .flash-header, .flash-nav, .flash-hint,
  .site-header, .site-footer, .content-tabs, .page-header { display: none !important; }
}

/* -- Download button ----------------------------------------------------- */
.download-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--soft-sage);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.download-row svg { flex-shrink: 0; color: var(--asla-green-dark); }
.download-row .dl-info { flex: 1; }
.download-row .dl-title { font-size: 14px; font-weight: 600; color: var(--asla-teal); }
.download-row .dl-sub { font-size: 12px; color: var(--dark-gray); }

/* -- Utilities ----------------------------------------------------------- */
.hidden { display: none !important; }
.text-teal { color: var(--asla-teal); }
.text-green { color: var(--asla-green); }
.text-muted { color: var(--dark-gray); }
.serif { font-family: var(--font-serif); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.fade-in { animation: fadeIn .3s ease-out; }
@keyframes fadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

/* -- Collapsible sections ------------------------------------------------ */
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 12px 0;
  border-bottom: 1px solid var(--grid-gray);
  user-select: none;
}
.collapsible-header:hover { color: var(--asla-teal); }
.collapsible-chevron {
  width: 20px;
  height: 20px;
  transition: transform .2s var(--ease-out);
  color: var(--placeholder-gray);
}
.collapsible-header.open .collapsible-chevron { transform: rotate(180deg); }
.collapsible-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s var(--ease-out);
}
.collapsible-body.open { max-height: 10000px; }

/* -- Print --------------------------------------------------------------- */
@media print {
  .site-header, .explore-bar, .content-tabs, .site-footer, .toc, .quiz-nav, .btn { display: none; }
  .content-area, .quiz-container { max-width: 100%; padding: 0; }
  body { background: #fff; }
}