/* edvo_site/style.css */

:root {
  /* Default Theme Colors (Blue) */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #eff6ff;
  --primary-dark: #1d4ed8;

  /* Global Brutalist Design System Variables */
  --border-color: #111827;
  --border-width: 3px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --card-bg: #ffffff;
  --text-color: #111827;
  --muted: #4b5563;
  --text-secondary: #4b5563;
  --transition-bouncy: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --notebook-grid: #e5e7eb;
  
  --success: #10b981;
  --success-light: #ecfdf5;
  --success-dark: #065f46;
  
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-sans: 'Inter', sans-serif;
  
  --accent-green: #10b981;
}

/* --- Base Reset & Typography --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #fdfbf7;
  background-image: linear-gradient(#e5e7eb 1px, transparent 1px), linear-gradient(90deg, #e5e7eb 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.1s ease;
}

a:hover {
  text-decoration: underline;
}

/* --- Layout Containers --- */
.wrap {
  max-width: 1150px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* --- Navigation & Breadcrumbs --- */
.crumb {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
  font-family: var(--font-body);
}

.crumb a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.crumb a:hover {
  text-decoration: underline;
}

/* --- Sibling Hub Switcher & Buttons --- */
.siblings {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.btn {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 14px;
  background: #ffffff;
  color: #111827;
  border: 3px solid #111827;
  border-radius: 12px;
  padding: 8px 16px;
  cursor: pointer;
  box-shadow: 4px 4px 0px #111827;
  transition: transform .1s, box-shadow .1s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #111827;
  text-decoration: none;
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 0px 0px 0px #111827;
}

/* --- Grid Systems --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}

/* --- Neobrutalist Cards --- */
.chap, .module-card, .exercise-card, .section-card, .prose {
  background: var(--card-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 6px 6px 0px var(--border-color);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
}

.chap:hover, .module-card:hover, .exercise-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0px var(--border-color) !important;
}

/* --- Badges --- */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  color: var(--primary);
  background: #fff;
  border: 2px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 2px 2px 0px var(--border-color);
}

/* --- Two-Column Layout --- */
.hub-layout {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

@media (min-width: 1024px) {
  .hub-layout {
    flex-direction: row;
    align-items: start;
  }
  .hub-main {
    flex: 1;
    min-width: 0;
  }
  .hub-side {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 40px;
  }
}

/* --- Sticky Sidebar Menu --- */
.sidebar {
  width: 280px;
  background-color: var(--card-bg);
  border-right: 3px solid var(--border-color);
  padding: 2rem 1.5rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  z-index: 10;
  top: 0;
  left: 0;
}

.main-content {
  margin-left: 280px;
  flex-grow: 1;
  padding: 3rem;
  max-width: 1050px;
  width: calc(100% - 280px);
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 3px solid var(--border-color);
    padding: 1.5rem;
  }
  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 1.5rem;
  }
}

.hub-side {
  background: var(--card-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: 4px 4px 0px var(--border-color);
}

.hub-side h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  text-transform: uppercase;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--notebook-grid);
  padding-bottom: 6px;
}

.hub-side ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hub-side ul li a {
  color: var(--text-color);
  text-decoration: none;
  display: block;
  padding: 4px 0;
  transition: padding-left 0.15s ease;
}

.hub-side ul li a:hover {
  color: var(--primary) !important;
  padding-left: 4px;
}

/* --- Solved Q&A Card Styling --- */
.q {
  background: var(--card-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 24px 0;
  box-shadow: 4px 4px 0px var(--border-color);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.q:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0px var(--border-color);
}

.q .qh {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--text-color);
}

.ans {
  border-left: 5px solid var(--primary);
  background: var(--primary-light);
  padding: 12px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-color);
}

/* --- Timed MCQ Quiz Elements --- */
.mcq {
  background: var(--card-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 20px 0;
  box-shadow: 4px 4px 0px var(--border-color);
}

.mcq .stem {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.opt {
  display: block;
  width: 100%;
  padding: 12px 16px;
  margin: 8px 0;
  background: #fff;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.1s;
}

.opt:hover {
  background: #f3f4f6;
}

.opt.correct {
  background: #d1fae5 !important;
  border-color: #059669 !important;
  color: #065f46 !important;
}

.opt.wrong {
  background: #fee2e2 !important;
  border-color: #dc2626 !important;
  color: #991b1b !important;
}

/* --- Progress Bar --- */
.testbar {
  position: -webkit-sticky;
  position: sticky;
  top: 10px;
  z-index: 50;
  background: var(--card-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 15px 20px;
  margin-bottom: 24px;
  box-shadow: 4px 4px 0px var(--border-color);
  display: flex;
  align-items: center;
  gap: 15px;
}

.prog {
  flex-grow: 1;
  height: 16px;
  background: #f1f5f9;
  border: 2px solid var(--border-color);
  border-radius: 999px;
  overflow: hidden;
}

/* --- Tables --- */
table.data {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14.5px;
  border: 2px solid var(--border-color);
}

table.data th {
  background: var(--primary);
  color: #fff;
  padding: 10px;
  text-align: left;
  border: 1px solid var(--border-color);
  font-family: var(--font-heading);
  font-weight: 700;
}

table.data td {
  border: 1px solid var(--border-color);
  padding: 10px;
  vertical-align: top;
  background: #fff;
  color: var(--text-color);
}

table.data tr:nth-child(even) td {
  background: var(--primary-light);
}

/* --- Flashcards --- */
.flashcard {
  perspective: 1000px;
  height: 220px;
  margin: 20px 0;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 6px 6px 0px var(--border-color);
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  font-weight: 700;
  font-family: var(--font-heading);
  border-radius: var(--radius-sm);
}

.flashcard-front {
  background: #fff;
  color: var(--text-color);
}

.flashcard-back {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: rotateY(180deg);
}

/* --- Print Helpers --- */
@media print {
  .no-print {
    display: none !important;
  }
  body {
    background: white !important;
    background-image: none !important;
  }
  .wrap {
    max-width: 100%;
    padding: 0;
  }
  .q, .ans, .mcq, .section-card, .prose {
    box-shadow: none !important;
    border: 1px solid #000 !important;
    break-inside: avoid;
  }
}