/* ==========================================================================
   Blue Security Ops - Course Styles
   Spot the Scam: Recognize Phishing Before You Click
   ========================================================================== */

/* ==========================================================================
   CSS Variables - Course Theme
   ========================================================================== */

:root {
  /* PUSHED Framework Colors */
  --pushed-p: #dc2626;  /* Pressure - Red */
  --pushed-u: #ea580c;  /* Urgency - Orange */
  --pushed-s: #ca8a04;  /* Surprise - Yellow/Amber */
  --pushed-h: #7c3aed;  /* High-stakes - Purple */
  --pushed-e: #16a34a;  /* Excitement - Green */
  --pushed-d: #2563eb;  /* Desperation - Blue */
  
  /* VERIFY Framework Colors */
  --verify-v: #0d9488;  /* Validate - Teal */
  --verify-e: #0891b2;  /* Evaluate - Cyan */
  --verify-r: #0284c7;  /* Review - Sky Blue */
  --verify-i: #6366f1;  /* Inspect - Indigo */
  --verify-f: #8b5cf6;  /* Freeze - Violet */
  --verify-y: #a855f7;  /* Yield - Purple */
  
  /* Course accent colors */
  --course-accent: #0d9488;
  --course-accent-dark: #0f766e;
  --course-accent-light: #ccfbf1;
  
  /* Status colors */
  --lesson-complete: #22c55e;
  --lesson-current: var(--course-accent);
  --lesson-pending: #94a3b8;
}

/* ==========================================================================
   Course Wrapper
   ========================================================================== */

.course-wrapper {
  min-height: calc(100vh - 200px);
}

/* ==========================================================================
   Course Header
   ========================================================================== */

.course-header {
  background: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #14b8a6 100%);
  color: #ffffff;
  padding: 2.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.course-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255,255,255,0.05) 0%, transparent 40%);
  pointer-events: none;
}

.course-header__container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.course-header__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  opacity: 0.9;
}

.course-header__breadcrumb a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
}

.course-header__breadcrumb a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.course-header__sep {
  font-size: 0.625rem;
  opacity: 0.6;
}

.course-header__title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.course-header__description {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0;
  line-height: 1.6;
}

/* ==========================================================================
   Course Landing Page
   ========================================================================== */

.course-landing {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 4rem;
}

/* Course Hero/Info Section */
.course-hero {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
  padding: 3rem 0;
}

@media (max-width: 900px) {
  .course-hero {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.course-hero__main h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.course-hero__main p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.course-hero__quote {
  background: linear-gradient(135deg, var(--course-accent-light) 0%, #e6fffa 100%);
  border-left: 4px solid var(--course-accent);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
}

.course-hero__quote p {
  font-style: italic;
  font-size: 1.0625rem;
  color: var(--color-dark);
  margin: 0;
  line-height: 1.6;
}

.course-hero__sidebar {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  height: fit-content;
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-md);
}

.course-meta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.course-meta__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9375rem;
}

.course-meta__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--course-accent-light);
  color: var(--course-accent);
  font-size: 1rem;
}

.course-meta__text strong {
  display: block;
  color: var(--color-dark);
  font-weight: 600;
}

.course-meta__text span {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.course-cta {
  margin-top: 1.5rem;
}

.course-cta__btn {
  display: block;
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s ease;
  background: linear-gradient(135deg, var(--course-accent) 0%, #14b8a6 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3);
}

.course-cta__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
  color: #ffffff;
}

.course-cta__price {
  display: block;
  text-align: center;
  margin-top: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--course-accent);
}

/* Course Modules List */
.course-modules {
  margin-top: 3rem;
}

.course-modules__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-dark);
}

.module-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.2s ease;
}

.module-card:hover {
  border-color: rgba(13, 148, 136, 0.3);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.module-card__header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  background: #fafafa;
  border-bottom: 1px solid var(--color-border);
}

.module-card__number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--course-accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.module-card__info {
  flex: 1;
}

.module-card__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--color-dark);
}

.module-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.module-card__meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.module-card__toggle {
  color: var(--color-text-light);
  transition: transform 0.3s ease;
}

.module-card.expanded .module-card__toggle {
  transform: rotate(180deg);
}

.module-card__lessons {
  display: none;
  padding: 0;
}

.module-card.expanded .module-card__lessons {
  display: block;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.15s ease;
}

.lesson-item:last-child {
  border-bottom: none;
}

.lesson-item:hover {
  background: #f5f5f5;
}

.lesson-item__icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  background: var(--color-bg);
  color: var(--color-text-light);
  flex-shrink: 0;
}

.lesson-item--completed .lesson-item__icon {
  background: var(--lesson-complete);
  color: #ffffff;
}

.lesson-item--quiz .lesson-item__icon {
  background: #fef3c7;
  color: #d97706;
}

.lesson-item__text {
  flex: 1;
  font-size: 0.9375rem;
}

.lesson-item__duration {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* Completed lesson styling */
.lesson-item--completed {
  background: rgba(34, 197, 94, 0.05);
}

.lesson-item--completed .lesson-item__icon {
  background: var(--lesson-complete);
  color: #ffffff;
}

.lesson-item--completed .lesson-item__icon i {
  font-size: 0.875rem;
}

.lesson-item--completed .lesson-item__text {
  color: var(--color-text-light);
}

/* Module completion states */
.module-card--complete .module-card__number {
  background: var(--lesson-complete);
  color: #ffffff;
}

.module-card--in-progress .module-card__number {
  background: var(--course-accent);
  color: #ffffff;
}

.module-card--complete .module-card__title {
  color: var(--color-text-light);
}

.module-card--complete .module-card__title::after {
  content: ' ✓';
  color: var(--lesson-complete);
}

/* ==========================================================================
   Lesson Navigation Bar
   ========================================================================== */

.lesson-nav {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 60px;
  z-index: 100;
}

.lesson-nav__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.lesson-nav__back {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--course-accent);
  text-decoration: none;
}

.lesson-nav__back:hover {
  color: var(--course-accent-dark);
}

.lesson-nav__progress {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.lesson-nav__module {
  font-weight: 600;
  color: var(--color-dark);
}

.lesson-nav__sep {
  opacity: 0.5;
}

.lesson-nav__actions {
  display: flex;
  gap: 0.5rem;
}

.lesson-nav__arrow {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.15s ease;
}

.lesson-nav__arrow:hover {
  background: var(--course-accent);
  border-color: var(--course-accent);
  color: #ffffff;
}

/* ==========================================================================
   Lesson Layout
   ========================================================================== */

.lesson-wrapper {
  min-height: calc(100vh - 200px);
  background: var(--color-bg);
}

.lesson-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 24px 4rem;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
}

@media (max-width: 1000px) {
  .lesson-main {
    grid-template-columns: 1fr;
  }
  
  .lesson-sidebar {
    display: none;
  }
}

/* Lesson Content */
.lesson-content {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.lesson-header {
  padding: 2rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
}

.lesson-header__number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--course-accent);
  background: var(--course-accent-light);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.lesson-header__title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
  color: var(--color-dark);
}

.lesson-header__meta {
  margin-top: 0.75rem;
  display: flex;
  gap: 1rem;
}

.lesson-header__duration {
  font-size: 0.875rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Lesson Body */
.lesson-body {
  padding: 2.5rem;
  line-height: 1.8;
}

.lesson-body h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem;
  color: var(--color-dark);
}

.lesson-body h2:first-child {
  margin-top: 0;
}

.lesson-body h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--color-dark);
}

.lesson-body p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-text);
}

.lesson-body ul,
.lesson-body ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.lesson-body ul {
  list-style: disc;
}

.lesson-body ol {
  list-style: decimal;
}

.lesson-body li {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.lesson-body strong {
  font-weight: 600;
  color: var(--color-dark);
}

/* Key Point Callout */
.key-point {
  background: linear-gradient(135deg, var(--course-accent-light) 0%, #e6fffa 100%);
  border-left: 4px solid var(--course-accent);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.key-point p {
  margin: 0;
  font-size: 1rem;
}

.key-point strong {
  color: var(--course-accent-dark);
}

/* Warning Callout */
.warning-box {
  background: #fef3c7;
  border-left: 4px solid #d97706;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.warning-box p {
  margin: 0;
  color: #92400e;
}

/* Example Box */
.example-box {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.example-box__title {
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

/* Statistic Highlight */
.stat-highlight {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
}

.stat-highlight__number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-serif);
}

.stat-highlight__text {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.5;
}

/* ==========================================================================
   PUSHED Framework Styling
   ========================================================================== */

.pushed-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

@media (max-width: 700px) {
  .pushed-grid {
    grid-template-columns: 1fr;
  }
}

.pushed-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  transition: all 0.2s ease;
}

.pushed-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.pushed-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.pushed-card--p::before { background: var(--pushed-p); }
.pushed-card--u::before { background: var(--pushed-u); }
.pushed-card--s::before { background: var(--pushed-s); }
.pushed-card--h::before { background: var(--pushed-h); }
.pushed-card--e::before { background: var(--pushed-e); }
.pushed-card--d::before { background: var(--pushed-d); }

.pushed-card__letter {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.pushed-card--p .pushed-card__letter { background: var(--pushed-p); }
.pushed-card--u .pushed-card__letter { background: var(--pushed-u); }
.pushed-card--s .pushed-card__letter { background: var(--pushed-s); }
.pushed-card--h .pushed-card__letter { background: var(--pushed-h); }
.pushed-card--e .pushed-card__letter { background: var(--pushed-e); }
.pushed-card--d .pushed-card__letter { background: var(--pushed-d); }

.pushed-card__title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.pushed-card__description {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.5;
  margin: 0;
}

/* PUSHED Tags */
.pushed-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.pushed-tag--p { background: #fee2e2; color: var(--pushed-p); }
.pushed-tag--u { background: #ffedd5; color: var(--pushed-u); }
.pushed-tag--s { background: #fef3c7; color: var(--pushed-s); }
.pushed-tag--h { background: #f3e8ff; color: var(--pushed-h); }
.pushed-tag--e { background: #dcfce7; color: var(--pushed-e); }
.pushed-tag--d { background: #dbeafe; color: var(--pushed-d); }

/* ==========================================================================
   VERIFY Framework Styling
   ========================================================================== */

.verify-steps {
  counter-reset: verify-step;
  margin: 2rem 0;
}

.verify-step {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  position: relative;
}

.verify-step::before {
  counter-increment: verify-step;
  content: counter(verify-step);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--course-accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.verify-step__content h4 {
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--color-dark);
}

.verify-step__content p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ==========================================================================
   Phish Example Display
   ========================================================================== */

.phish-example {
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 1.5rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.phish-example__header {
  background: #f3f4f6;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e5e7eb;
  font-size: 0.8125rem;
}

.phish-example__from {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.phish-example__from-name {
  font-weight: 600;
  color: var(--color-dark);
}

.phish-example__from-email {
  color: var(--color-text-light);
  font-family: monospace;
  font-size: 0.75rem;
}

.phish-example__subject {
  font-weight: 600;
  color: var(--color-dark);
}

.phish-example__body {
  padding: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* SMS Example */
.sms-example {
  max-width: 320px;
  background: #f3f4f6;
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin: 1.5rem auto;
}

.sms-example__header {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.sms-example__bubble {
  background: #e5e7eb;
  padding: 0.75rem 1rem;
  border-radius: 18px 18px 18px 4px;
  font-size: 0.9375rem;
  line-height: 1.5;
  max-width: 90%;
}

/* ==========================================================================
   Interactive Elements
   ========================================================================== */

/* PUSHED Identification Exercise */
.pushed-exercise {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2rem 0;
}

.pushed-exercise__title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.pushed-exercise__message {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.pushed-exercise__options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

@media (max-width: 600px) {
  .pushed-exercise__options {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pushed-checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.875rem;
}

.pushed-checkbox:hover {
  background: var(--color-bg);
}

.pushed-checkbox.selected {
  border-color: var(--course-accent);
  background: var(--course-accent-light);
}

.pushed-checkbox input {
  accent-color: var(--course-accent);
}

.pushed-exercise__submit {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--course-accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pushed-exercise__submit:hover {
  background: var(--course-accent-dark);
}

.pushed-exercise__feedback {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: none;
}

.pushed-exercise__feedback.show {
  display: block;
}

.pushed-exercise__feedback.correct {
  background: #dcfce7;
  border: 1px solid #86efac;
}

.pushed-exercise__feedback.incorrect {
  background: #fee2e2;
  border: 1px solid #fca5a5;
}

/* ==========================================================================
   Quiz Styles
   ========================================================================== */

.quiz-container {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: 2rem 0;
}

.quiz-header {
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, var(--course-accent-light) 0%, #e6fffa 100%);
  border-bottom: 1px solid var(--color-border);
}

.quiz-header__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--color-dark);
}

.quiz-header__progress {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.quiz-progress-bar {
  flex: 1;
  height: 8px;
  background: rgba(0,0,0,0.1);
  border-radius: 4px;
  overflow: hidden;
}

.quiz-progress-bar__fill {
  height: 100%;
  background: var(--course-accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.quiz-body {
  padding: 2rem;
}

.quiz-question {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--color-dark);
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
}

.quiz-option:hover {
  border-color: var(--course-accent);
  background: rgba(13, 148, 136, 0.03);
}

.quiz-option.selected {
  border-color: var(--course-accent);
  background: var(--course-accent-light);
}

.quiz-option.correct {
  border-color: var(--lesson-complete);
  background: #dcfce7;
}

.quiz-option.incorrect {
  border-color: #dc2626;
  background: #fee2e2;
}

.quiz-option input {
  margin-top: 2px;
  accent-color: var(--course-accent);
}

.quiz-option__text {
  font-size: 0.9375rem;
  line-height: 1.5;
}

.quiz-actions {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

.quiz-btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.quiz-btn--primary {
  background: var(--course-accent);
  color: #ffffff;
}

.quiz-btn--primary:hover {
  background: var(--course-accent-dark);
}

.quiz-btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.quiz-btn--secondary:hover {
  background: var(--color-bg);
}

.quiz-feedback {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius-md);
}

.quiz-feedback.correct {
  background: #dcfce7;
  border: 1px solid #86efac;
}

.quiz-feedback.incorrect {
  background: #fee2e2;
  border: 1px solid #fca5a5;
}

.quiz-feedback__icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.quiz-feedback__title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.quiz-feedback__explanation {
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Quiz Results */
.quiz-results {
  text-align: center;
  padding: 3rem 2rem;
}

.quiz-results__score {
  font-size: 4rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--course-accent);
  margin-bottom: 1rem;
}

.quiz-results__message {
  font-size: 1.25rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.quiz-results__detail {
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

/* ==========================================================================
   Lesson Footer
   ========================================================================== */

.lesson-footer {
  padding: 2rem 2.5rem;
  border-top: 1px solid var(--color-border);
  background: #fafafa;
}

.lesson-footer__nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.lesson-footer__prev,
.lesson-footer__next {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
  max-width: 45%;
}

.lesson-footer__prev:hover,
.lesson-footer__next:hover {
  border-color: var(--course-accent);
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.lesson-footer__prev span,
.lesson-footer__next span {
  display: flex;
  flex-direction: column;
}

.lesson-footer__prev small,
.lesson-footer__next small {
  font-size: 0.75rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lesson-footer__next {
  text-align: right;
  margin-left: auto;
}

.lesson-footer__next span {
  align-items: flex-end;
}

/* ==========================================================================
   Lesson Sidebar
   ========================================================================== */

.lesson-sidebar {
  position: relative;
}

.lesson-sidebar__sticky {
  position: sticky;
  top: 120px;
}

.lesson-sidebar__progress,
.lesson-sidebar__outline,
.lesson-sidebar__help {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.lesson-sidebar__progress h3,
.lesson-sidebar__outline h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 1rem;
}

/* Progress Ring */
.progress-ring {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 0 auto;
}

.progress-ring svg {
  transform: rotate(-90deg);
}

.progress-ring__bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 8;
}

.progress-ring__fill {
  fill: none;
  stroke: var(--course-accent);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 0.5s ease;
}

.progress-ring__text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
}

/* Lesson Outline */
.lesson-outline {
  list-style: none;
  padding: 0;
  margin: 0;
}

.lesson-outline__item {
  margin-bottom: 0.5rem;
}

.lesson-outline__item a {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--color-text);
  transition: background 0.15s ease;
}

.lesson-outline__item a:hover {
  background: var(--color-bg);
}

.lesson-outline__item--current a {
  background: var(--course-accent-light);
  color: var(--course-accent-dark);
  font-weight: 500;
}

.lesson-outline__item--completed .lesson-outline__icon {
  color: var(--lesson-complete);
}

.lesson-outline__item--current .lesson-outline__icon {
  color: var(--course-accent);
}

.lesson-outline__icon {
  font-size: 0.875rem;
  color: var(--lesson-pending);
  flex-shrink: 0;
}

/* Help Box */
.lesson-sidebar__help {
  background: #fffbeb;
  border-color: #fde68a;
}

.lesson-sidebar__help p {
  margin: 0;
  font-size: 0.875rem;
  color: #92400e;
}

.lesson-sidebar__help i {
  margin-right: 0.5rem;
  color: #d97706;
}

.lesson-sidebar__help a {
  color: #d97706;
  font-weight: 500;
}

/* ==========================================================================
   Completion Page
   ========================================================================== */

.completion-page {
  text-align: center;
  padding: 4rem 2rem;
}

.completion-page__icon {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--course-accent) 0%, #14b8a6 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 0 auto 2rem;
  box-shadow: 0 10px 40px rgba(13, 148, 136, 0.3);
}

.completion-page__title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.completion-page__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.completion-card {
  background: #ffffff;
  border: 2px solid var(--course-accent);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.completion-card__badge {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fcd34d 0%, #f59e0b 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1.5rem;
}

.completion-card__course {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.completion-card__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.completion-card__date {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.completion-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.completion-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.completion-btn--primary {
  background: var(--course-accent);
  color: #ffffff;
}

.completion-btn--primary:hover {
  background: var(--course-accent-dark);
  color: #ffffff;
}

.completion-btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.completion-btn--secondary:hover {
  background: var(--color-bg);
}

/* ==========================================================================
   Mobile Responsive
   ========================================================================== */

@media (max-width: 768px) {
  .course-header__title {
    font-size: 1.75rem;
  }
  
  .course-hero {
    padding: 2rem 0;
  }
  
  .lesson-header {
    padding: 1.5rem;
  }
  
  .lesson-header__title {
    font-size: 1.5rem;
  }
  
  .lesson-body {
    padding: 1.5rem;
  }
  
  .lesson-footer {
    padding: 1.5rem;
  }
  
  .lesson-footer__nav {
    flex-direction: column;
  }
  
  .lesson-footer__prev,
  .lesson-footer__next {
    max-width: 100%;
  }
  
  .pushed-grid {
    grid-template-columns: 1fr;
  }
  
  .quiz-body {
    padding: 1.5rem;
  }
  
  .completion-page {
    padding: 2rem 1rem;
  }
  
  .completion-page__title {
    font-size: 1.75rem;
  }
}