/* =====================================================
   Learning Theories Lesson Plan — Shared Styles
   PSY101 | Introduction to Learning Theories
   ===================================================== */

/* === CSS VARIABLES === */
:root {
  --primary: #2c3e8c;
  --primary-light: #4a6bd8;
  --primary-dark: #1a2a6c;
  --secondary: #e67e22;
  --ai-purple: #805ad5;
  --ai-light: #f3f0ff;
  --bg: #f0f2f8;
  --bg-card: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  --success: #38a169;
  --success-light: #f0fff4;
  --warning: #d69e2e;
  --warning-light: #fffbeb;
  --danger: #e53e3e;
  --danger-light: #fff5f5;
  --info: #3182ce;
  --info-light: #ebf8ff;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 2px 8px rgba(44,62,140,0.10);
  --shadow-md: 0 4px 16px rgba(44,62,140,0.14);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition: 0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text-primary); line-height: 1.7; min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-light); text-decoration: underline; }
img { max-width: 100%; display: block; }

/* === NAVIGATION === */
.navbar { background: var(--primary-dark); color: #fff; padding: 0 2rem; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-md); }
.navbar-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.navbar-brand { font-size: 1.1rem; font-weight: 700; color: #fff; letter-spacing: -0.5px; display: flex; align-items: center; gap: 10px; }
.navbar-brand span { background: var(--secondary); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }
.navbar-links { display: flex; align-items: center; gap: 4px; }
.navbar-links a { color: rgba(255,255,255,0.82); padding: 8px 14px; border-radius: 6px; font-size: 0.875rem; font-weight: 500; transition: background var(--transition), color var(--transition); }
.navbar-links a:hover, .navbar-links a.active { background: rgba(255,255,255,0.15); color: #fff; text-decoration: none; }
.role-badge { padding: 4px 12px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: 2px solid transparent; }
.role-badge.teacher { background: #c05621; color: #fff; }
.role-badge.student { background: #2b6cb0; color: #fff; }
.navbar-hamburger { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; }
/* === LAYOUT === */
.container { max-width: 1100px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.page-header { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%); color: #fff; padding: 3rem 2rem 2.5rem; border-radius: var(--radius-lg); margin-bottom: 2rem; position: relative; overflow: hidden; }
.page-header::after { content: ''; position: absolute; right: -60px; top: -60px; width: 260px; height: 260px; border-radius: 50%; background: rgba(255,255,255,0.06); }
.page-header h1 { font-size: clamp(1.6rem,3vw,2.3rem); font-weight: 800; margin-bottom: 0.5rem; line-height: 1.25; }
.page-header .subtitle { font-size: 1rem; opacity: 0.85; }
.page-header .meta-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 1.25rem; }
.meta-tag { background: rgba(255,255,255,0.18); backdrop-filter: blur(4px); color: #fff; padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; }
/* === SECTION HERO === */
.section-hero { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 70%, var(--primary-light) 100%); color: #fff; padding: 2.5rem 2rem 2rem; border-radius: var(--radius-lg); margin-bottom: 2rem; }
.section-hero h1 { font-size: clamp(1.4rem,2.5vw,2rem); font-weight: 800; margin-bottom: 0.4rem; }
.section-hero .sub { opacity: 0.85; font-size: 0.97rem; }
/* === CARDS === */
.card { background: var(--bg-card); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); margin-bottom: 1.25rem; border: 1px solid var(--border); }
.card-header { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin-bottom: 0.75rem; display: flex; align-items: center; gap: 8px; }
.card-header .icon { font-size: 1.2rem; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 1.25rem; }
.card-highlight { border-left: 4px solid var(--primary); }
.card-ai { border-left: 4px solid var(--ai-purple); background: linear-gradient(135deg, #faf9ff 0%, var(--bg-card) 100%); }
.card-success { border-left: 4px solid var(--success); background: var(--success-light); }
.card-warning { border-left: 4px solid var(--warning); background: var(--warning-light); }
.card-info { border-left: 4px solid var(--info); background: var(--info-light); }
/* === TABS === */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 1.5rem; border-bottom: 2px solid var(--border); padding-bottom: 0; }
.tab-btn { padding: 9px 18px; border: none; border-radius: 8px 8px 0 0; background: transparent; color: var(--text-secondary); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: var(--transition); border-bottom: 3px solid transparent; margin-bottom: -2px; }
.tab-btn:hover { background: rgba(44,62,140,0.08); color: var(--primary); }
.tab-btn.active { background: var(--bg-card); color: var(--primary); border-bottom: 3px solid var(--primary); box-shadow: var(--shadow); }
.tab-panel { display: none; animation: fadeIn 0.25s ease; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity:0; transform:translateY(4px); } to { opacity:1; transform:translateY(0); } }
/* === BUTTONS === */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 20px; border-radius: 8px; font-size: 0.9rem; font-weight: 600; cursor: pointer; border: none; transition: var(--transition); text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; text-decoration: none; }
.btn-secondary { background: var(--bg); color: var(--primary); border: 2px solid var(--primary); }
.btn-secondary:hover { background: var(--primary); color: #fff; text-decoration: none; }
.btn-ai { background: var(--ai-purple); color: #fff; }
.btn-ai:hover { background: #6b46c1; color: #fff; text-decoration: none; }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }
.btn-outline { background: transparent; border: 2px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
/* === BADGES === */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.3px; text-transform: uppercase; }
.badge-primary { background: #dbeafe; color: var(--primary); }
.badge-ai { background: #ede9fe; color: var(--ai-purple); }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-bloom { background: #e0e7ff; color: #3730a3; }
/* === ACCORDION === */
.accordion-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.75rem; overflow: hidden; }
.accordion-header { padding: 1rem 1.25rem; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: var(--bg-card); transition: background var(--transition); }
.accordion-header:hover { background: #f7f9ff; }
.accordion-header.open { background: #eef2ff; color: var(--primary); }
.accordion-body { display: none; padding: 1.25rem; border-top: 1px solid var(--border); background: #fafbff; }
.accordion-body.open { display: block; }
.accordion-arrow { transition: transform var(--transition); font-size: 0.85rem; }
.accordion-header.open .accordion-arrow { transform: rotate(180deg); }
/* === TABLES === */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { background: var(--primary); color: #fff; padding: 10px 14px; text-align: left; font-weight: 600; font-size: 0.85rem; }
td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr:nth-child(even) td { background: #f7f9ff; }
tr:hover td { background: #eef2ff; }
/* === QUIZ === */
.quiz-question { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1rem; }
.quiz-question p { font-weight: 600; margin-bottom: 0.75rem; }
.quiz-option { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-radius: 8px; margin-bottom: 6px; cursor: pointer; border: 2px solid var(--border); background: #fff; transition: var(--transition); }
.quiz-option:hover { border-color: var(--primary-light); background: #eef2ff; }
.quiz-option.selected { border-color: var(--primary); background: #dbeafe; }
.quiz-option.correct { border-color: var(--success); background: var(--success-light); }
.quiz-option.incorrect { border-color: var(--danger); background: var(--danger-light); }
.quiz-feedback { padding: 10px 14px; border-radius: 8px; margin-top: 8px; font-size: 0.9rem; display: none; }
.quiz-feedback.show { display: block; }
.quiz-feedback.correct { background: var(--success-light); color: #065f46; border: 1px solid #6ee7b7; }
.quiz-feedback.incorrect { background: var(--danger-light); color: #991b1b; border: 1px solid #fca5a5; }
/* === PROGRESS === */
.progress-bar-wrap { background: var(--border); border-radius: 99px; height: 10px; margin: 8px 0; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transition: width 0.6s ease; }
.progress-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 4px; }
/* === AI CALLOUT === */
.ai-callout { background: linear-gradient(135deg, #f3f0ff 0%, #ede9fe 100%); border: 1.5px solid #c4b5fd; border-radius: var(--radius); padding: 1.1rem 1.3rem; margin-bottom: 1rem; }
.ai-callout-title { font-weight: 700; color: var(--ai-purple); margin-bottom: 0.4rem; display: flex; align-items: center; gap: 7px; font-size: 0.97rem; }
.ai-callout p, .ai-callout li { font-size: 0.9rem; color: #4c1d95; }
.ai-callout ul { padding-left: 1.25rem; }
/* === TIMELINE === */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before { content:''; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; margin-bottom: 1.5rem; }
.timeline-item::before { content:''; position:absolute; left: -1.8rem; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); border: 2px solid #fff; box-shadow: 0 0 0 2px var(--primary); }
.timeline-time { font-size: 0.78rem; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 3px; }
.timeline-title { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.timeline-body { font-size: 0.9rem; color: var(--text-secondary); }
/* === TEACHER/STUDENT TABS === */
.role-tabs { display: flex; gap: 8px; margin-bottom: 1rem; }
.role-tab { padding: 7px 18px; border-radius: 8px; font-size: 0.875rem; font-weight: 600; cursor: pointer; border: 2px solid var(--border); background: var(--bg); color: var(--text-secondary); transition: var(--transition); }
.role-tab.active-teacher { background: #7b341e; color: #fff; border-color: #7b341e; }
.role-tab.active-student { background: var(--primary); color: #fff; border-color: var(--primary); }
.role-content { display: none; }
.role-content.active { display: block; }
/* === FOOTER === */
footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); text-align: center; padding: 1.5rem 1rem; font-size: 0.85rem; margin-top: 3rem; }
footer a { color: rgba(255,255,255,0.85); }
/* === UTILITY === */
.text-muted { color: var(--text-muted); }
.text-small { font-size: 0.85rem; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; }
.flex-between { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; background: var(--border); color: var(--text-secondary); margin: 2px; }
.chip-primary { background: #dbeafe; color: var(--primary); }
.chip-ai { background: #ede9fe; color: var(--ai-purple); }
.divider { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
/* === MOBILE === */
@media (max-width: 768px) {
  .navbar-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--primary-dark); padding: 1rem; gap: 4px; }
  .navbar-links.open { display: flex; }
  .navbar-hamburger { display: block; }
  .container { padding: 1.5rem 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .tabs { gap: 4px; }
  .tab-btn { padding: 7px 12px; font-size: 0.82rem; }
  table { font-size: 0.82rem; }
  th, td { padding: 8px 10px; }
}