/* ============================================
   Cloud Pratica — Courses Styles
   ============================================ */

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
  justify-content: center;
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.filter-btn.active {
  background: rgba(107, 163, 247, 0.1);
  border-color: #6BA3F7;
  color: #6BA3F7;
}

.filter-btn.active:hover,
.filter-btn.active:active,
.filter-btn.active:focus,
.filter-btn:active {
  border-color: #6BA3F7;
  color: #6BA3F7;
}

/* ── Card Logo ── */
.card__logo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.card__logo-badge {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.8);
  padding: 4px;
}


/* ── Course Description ── */
.course-description {
  margin-bottom: var(--space-10);
}

.course-description__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
}

.course-description__title svg {
  color: var(--course-theme, #E8700A);
  flex-shrink: 0;
}

.course-description__body h4 {
  margin-bottom: 10px;
}

.course-description__body p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.92);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.course-description__body img {
  border-radius: var(--radius-lg);
  max-width: 100%;
  height: auto;
}

.course-description__highlights {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.course-description__highlights-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.course-description__highlights-title svg {
  color: var(--course-theme, var(--color-accent));
}

.course-description__list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.course-description__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.92);
  line-height: var(--leading-relaxed);
}

.course-description__list li::before {
  content: '✓';
  color: var(--course-theme, var(--color-accent));
  font-weight: var(--weight-bold);
  flex-shrink: 0;
}

/* ── Content List inside Description ── */
.course-description__content-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: var(--space-4);
  display: grid;
  gap: var(--space-1);
}

.course-description__content-list li {
  position: relative;
  padding-left: var(--space-4);
  line-height: var(--leading-relaxed);
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--text-base);
}

.course-description__content-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--course-theme, var(--color-accent));
  font-weight: bold;
  font-size: 1.2em;
  line-height: 1.5;
}

/* ── Course Architecture Diagram ── */
.course-architecture {
  margin-bottom: var(--space-10);
}

.course-architecture__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
}

.course-architecture__title svg {
  color: var(--course-theme, #E8700A);
  flex-shrink: 0;
}

.course-architecture__image-wrapper {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 0;
  text-align: center;
}

.course-architecture__image-wrapper + .course-architecture__image-wrapper {
  margin-top: var(--space-8);
}

.course-architecture__subtitle {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  text-align: left;
}

.course-architecture__image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ── Course Detail Header Tags ── */
.card__tags--header {
  justify-content: center;
  margin-top: var(--space-2);
  gap: 8px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.card__tag--header {
  padding: 4px 14px;
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  color: var(--color-text-secondary);
}

/* ── Course Detail Logo ── */
.course-detail__logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin: 0 auto var(--space-4);
  display: block;
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-lg);
  padding: 8px;
}

/* ── Course Card (list page) ── */
.course-list-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.course-list-card .card__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.course-list-card .card__title {
  font-size: var(--text-lg);
}

.course-list-card .card__arrow {
  position: absolute;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  border-radius: 50%;
  color: var(--color-accent);
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--transition-base);
}

.course-list-card:hover .card__arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ── Course Detail Overview ── */
.course-overview {
  margin-bottom: var(--space-8);
}

.course-overview__stats {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  padding: var(--space-6);
  background: linear-gradient(135deg, rgba(232, 112, 10, 0.10), rgba(232, 112, 10, 0.03));
  border: 1px solid rgba(232, 112, 10, 0.25);
  border-radius: var(--radius-xl);
}

.course-overview__stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.course-overview__stat svg {
  color: var(--course-theme, #E8700A);
}

/* ── Chapter Accordion in detail ── */
.accordion {
  margin-bottom: var(--space-12);
}

.accordion__chapter-row {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.accordion__chapter-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--course-theme-light, #F09030);
  margin-right: var(--space-2);
  min-width: 44px;
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
}

.accordion__chapter-name {
  flex: 1;
  min-width: 0;
}

@media (max-width: 768px) {
  .accordion__chapter-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .accordion__chapter-number {
    margin-right: 0;
    min-width: auto;
    font-size: 0.65rem;
  }

  .accordion__chapter-name {
    font-size: var(--text-sm);
    line-height: 1.4;
  }

  .accordion__header {
    padding: var(--space-3) var(--space-4);
  }

  .accordion__item {
    margin-bottom: var(--space-1);
  }
}

.accordion__task-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-left: auto;
  margin-right: var(--space-3);
  white-space: nowrap;
}

.accordion__item {
  border-bottom: none;
  margin-bottom: var(--space-2);
}

.accordion__header {
  background: linear-gradient(135deg, rgba(var(--course-theme-rgb, 232, 112, 10), 0.12), rgba(var(--course-theme-rgb, 232, 112, 10), 0.04));
  border-left: 3px solid var(--course-theme, #E8700A);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-primary);
  cursor: default;
}

.accordion__item.active .accordion__header {
  border-left-color: var(--course-theme-light, #F09030);
  background: linear-gradient(135deg, rgba(var(--course-theme-rgb, 232, 112, 10), 0.18), rgba(var(--course-theme-rgb, 232, 112, 10), 0.06));
}

.accordion__icon {
  color: var(--course-theme, #E8700A);
}

.accordion__task {
  color: rgba(255, 255, 255, 0.92);
}

.accordion__task-number {
  min-width: 24px;
  color: var(--course-theme, #E8700A);
  font-weight: var(--weight-bold);
}

/* ── Testimonials ── */
.testimonials-section {
  margin: var(--space-16) 0;
}

.testimonials__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-8);
  color: var(--color-text-primary);
}

.testimonials__title svg {
  color: var(--course-theme, #E8700A);
}

/* ── Tweet-style Cards ── */
.tweet-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.15s ease;
}

.tweet-card:last-child {
  border-bottom: none;
}

.tweet-card:hover {
  background: rgba(255, 255, 255, 0.03);
}

.tweet-card__avatar {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--course-theme, var(--color-accent)), #6BA3F7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.tweet-card__initial {
  font-size: 16px;
  font-weight: var(--weight-bold);
  color: #fff;
  letter-spacing: 0.02em;
}

.tweet-card__content {
  flex: 1;
  min-width: 0;
}

.tweet-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.tweet-card__name {
  font-weight: var(--weight-bold);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.tweet-card__badge {
  font-size: 11px;
  font-weight: var(--weight-semibold);
  color: var(--course-theme, var(--color-accent));
  background: rgba(0, 133, 255, 0.12);
  padding: 2px 8px;
  border-radius: 12px;
  letter-spacing: 0.02em;
}

.tweet-card__body p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.92);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
}

.tweet-card__expand {
  animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tweet-card__toggle {
  background: none;
  border: none;
  color: #6BA3F7;
  font-size: var(--text-sm);
  font-family: var(--font-primary);
  font-weight: var(--weight-medium);
  cursor: pointer;
  padding: var(--space-1) 0;
  margin-top: var(--space-1);
  transition: color 0.15s ease;
}

.tweet-card__toggle:hover {
  color: #93bbf9;
  text-decoration: underline;
}

/* ── Course Navigation (prev/next) ── */
.course-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.course-nav__link {
  display: block;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.course-nav__link:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
}

.course-nav__link--next {
  text-align: right;
}

.course-nav__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.course-nav__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

@media (max-width: 640px) {
  .course-nav {
    grid-template-columns: 1fr;
  }

  .course-nav__link--next {
    text-align: left;
  }

  .tweet-card {
    padding: var(--space-4) var(--space-2);
    gap: var(--space-3);
  }

  .tweet-card__avatar {
    width: 36px;
    height: 36px;
  }

  .tweet-card__avatar svg {
    width: 18px;
    height: 18px;
  }
}

/* ── Badge Colors ── */
.badge--aws { background: rgba(255, 153, 0, 0.1); color: #ff9900; border-color: rgba(255, 153, 0, 0.2); }
.badge--terraform { background: rgba(129, 69, 228, 0.1); color: #8145E4; border-color: rgba(129, 69, 228, 0.2); }
.badge--k8s { background: rgba(50, 108, 229, 0.1); color: #326CE5; border-color: rgba(50, 108, 229, 0.2); }
.badge--datadog { background: rgba(99, 44, 166, 0.1); color: #632CA6; border-color: rgba(99, 44, 166, 0.2); }
.badge--gcp { background: rgba(66, 133, 244, 0.1); color: #4285F4; border-color: rgba(66, 133, 244, 0.2); }
.badge--cicd { background: rgba(45, 186, 78, 0.1); color: #2DBA4E; border-color: rgba(45, 186, 78, 0.2); }