/* File: assets/css/courses.css */
/* Pataravitaya School — Modern Curriculum & Academic Partnerships Styles */
/* Built per Rule 14 (CSS Isolation), Rule 20 / Rule 61 (Luxury Design & Anti-Slop) */

:root {
  --courses-brand: #C00000;
  --courses-brand-dark: #7f0000;
  --courses-brand-soft: rgba(192, 0, 0, 0.08);
  --courses-brand-border: rgba(192, 0, 0, 0.22);
  --courses-gold: #D4AF37;
  --courses-gold-dark: #8c6b12;
  --courses-gold-soft: rgba(212, 175, 55, 0.12);
  --courses-gold-border: rgba(212, 175, 55, 0.28);
  
  --courses-surface: #ffffff;
  --courses-surface-2: #f8fafc;
  --courses-surface-3: #f1f5f9;
  --courses-line: #e2e8f0;
  --courses-line-subtle: #edf2f7;
  --courses-ink: #0f172a;
  --courses-ink-muted: #475569;
  
  --courses-blue: #2563eb;
  --courses-blue-soft: rgba(37, 99, 235, 0.08);
  --courses-blue-border: rgba(37, 99, 235, 0.22);

  --courses-cyan: #0284c7;
  --courses-cyan-soft: rgba(2, 132, 199, 0.08);
  --courses-cyan-border: rgba(2, 132, 199, 0.22);

  --courses-purple: #7c3aed;
  --courses-purple-soft: rgba(124, 58, 237, 0.08);
  --courses-purple-border: rgba(124, 58, 237, 0.22);

  --courses-radius-sm: 8px;
  --courses-radius-md: 12px;
  --courses-radius-lg: 16px;
  --courses-radius-xl: 20px;

  --courses-shadow: 0 4px 18px rgba(15, 23, 42, 0.05);
  --courses-shadow-hover: 0 12px 28px rgba(15, 23, 42, 0.10);
}

/* --- Scope Root Wrapper --- */
.courses-main-wrapper {
  color: var(--courses-ink);
  background-color: var(--courses-surface-2);
  font-family: 'Kanit', sans-serif;
  padding-bottom: 40px;
}

/* --- Hero Section --- */
.courses-hero-banner {
  background: linear-gradient(180deg, #ffffff 0%, var(--courses-surface-2) 100%);
  border-bottom: 1px solid var(--courses-line);
  padding: 48px 0 36px;
  text-align: center;
}
.courses-hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  background: var(--courses-brand-soft);
  border: 1px solid var(--courses-brand-border);
  color: var(--courses-brand);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.courses-hero-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--courses-ink);
  line-height: 1.25;
  margin: 0 0 8px 0;
}
.courses-hero-subtitle {
  font-size: 17px;
  color: var(--courses-gold-dark);
  font-weight: 500;
  margin-bottom: 16px;
}
.courses-hero-desc {
  max-width: 820px;
  margin: 0 auto;
  color: var(--courses-ink-muted);
  font-size: 15.5px;
  line-height: 1.7;
}

/* --- Section Layouts --- */
.courses-section-wrap {
  padding: 36px 0 48px;
}
.courses-section-wrap.alt-bg {
  background: var(--courses-surface);
  border-top: 1px solid var(--courses-line);
  border-bottom: 1px solid var(--courses-line);
}
.courses-section-head {
  margin-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 2px solid var(--courses-line-subtle);
  padding-bottom: 14px;
}
.courses-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.courses-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--courses-brand-soft);
  border: 1px solid var(--courses-brand-border);
  color: var(--courses-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.courses-section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--courses-ink);
  margin: 0;
  line-height: 1.3;
}
.courses-section-sub {
  font-size: 13px;
  color: var(--courses-ink-muted);
  margin-top: 2px;
}
.courses-section-tag {
  font-size: 12px;
  color: var(--courses-brand);
  background: var(--courses-brand-soft);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  border: 1px solid var(--courses-brand-border);
  white-space: nowrap;
}

/* --- Grids --- */
.courses-grid-1 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.courses-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.courses-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* --- Program Card (Luxury Anti-Slop) --- */
.program-card {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-lg);
  padding: 26px;
  box-shadow: var(--courses-shadow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.program-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--courses-brand), var(--courses-gold));
  opacity: 0.9;
}
.program-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--courses-shadow-hover);
  border-color: var(--courses-brand-border);
}
.program-card.featured {
  grid-column: 1 / -1;
  border-color: var(--courses-brand-border);
  background: linear-gradient(180deg, var(--courses-surface) 0%, var(--courses-surface-2) 100%);
}

/* Card Elements */
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 10px;
  flex-wrap: wrap;
}
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}
.badge-lang { background: var(--courses-blue-soft); color: var(--courses-blue); border: 1px solid var(--courses-blue-border); }
.badge-cyan { background: var(--courses-cyan-soft); color: var(--courses-cyan); border: 1px solid var(--courses-cyan-border); }
.badge-robotics { background: var(--courses-cyan-soft); color: var(--courses-cyan); border: 1px solid var(--courses-cyan-border); }
.badge-math { background: var(--courses-purple-soft); color: var(--courses-purple); border: 1px solid var(--courses-purple-border); }
.badge-music { background: var(--courses-gold-soft); color: var(--courses-gold-dark); border: 1px solid var(--courses-gold-border); }

/* Partner Badge & Placeholder */
.partner-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 9999px;
  background: var(--courses-surface-2);
  border: 1px solid var(--courses-line);
  color: var(--courses-ink);
  white-space: nowrap;
  flex-shrink: 0;
}
.partner-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--courses-brand);
}

.card-title-row {
  margin-bottom: 12px;
}
.program-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--courses-ink);
  line-height: 1.3;
  margin: 0 0 4px 0;
}
.program-title-en {
  font-size: 13px;
  color: var(--courses-ink-muted);
  font-weight: 500;
}

/* Logo & Academic Partnership Box (Decoupled Layout for Maximum Text Room) */
.partner-placeholder-box {
  background: var(--courses-surface-2);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-md);
  padding: 12px 14px;
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s;
}
.partner-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--courses-line);
}
.partner-box-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--courses-brand);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.partner-box-tag svg {
  flex-shrink: 0;
}
.partner-box-status {
  font-size: 10.5px;
  color: var(--courses-ink-muted);
  font-weight: 500;
  background: var(--courses-surface);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--courses-line);
}
.partner-box-content {
  display: flex;
  align-items: center;
  gap: 12px;
}
.placeholder-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: var(--courses-brand);
  flex-shrink: 0;
}
.partner-logo-box {
  min-width: 44px;
  max-width: 120px;
  height: 40px;
  padding: 3px 8px;
  background: #ffffff;
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  flex-shrink: 0;
}
.partner-logo-img {
  max-height: 32px;
  max-width: 104px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}
.placeholder-text-wrap {
  flex: 1;
  min-width: 0;
}
.placeholder-text-main {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--courses-ink);
  line-height: 1.35;
  margin-bottom: 2px;
}
.placeholder-text-sub {
  font-size: 11.5px;
  color: var(--courses-ink-muted);
  line-height: 1.45;
}
.placeholder-tag {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--courses-line);
  color: var(--courses-ink-muted);
  font-weight: 600;
  white-space: nowrap;
}

/* Program Content */
.program-desc {
  font-size: 14px;
  color: var(--courses-ink-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

.program-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.program-bullets li {
  font-size: 13px;
  color: var(--courses-ink);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}
.program-bullets li::before {
  content: '✓';
  color: var(--courses-brand);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* Target Level Tag Bar */
.card-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--courses-line-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  flex-wrap: wrap;
}
.level-label {
  color: var(--courses-ink-muted);
  font-weight: 500;
}
.level-badges {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.level-pill {
  background: var(--courses-surface-2);
  border: 1px solid var(--courses-line);
  color: var(--courses-ink);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

/* --- Cluster Wrappers & Banners (Approach A: Curriculum-First Grouping) --- */
.courses-cluster-wrap {
  margin-bottom: 36px;
}
.cluster-partner-banner {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-lg);
  padding: 22px 26px;
  margin-bottom: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  box-shadow: var(--courses-shadow);
  position: relative;
  overflow: hidden;
}
.cluster-partner-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--courses-blue), var(--courses-cyan));
  opacity: 0.9;
}
.cluster-banner-left {
  flex: 1;
  min-width: 0;
}
.cluster-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--courses-ink);
  margin: 8px 0 4px 0;
  line-height: 1.3;
}
.cluster-sub {
  font-size: 13.5px;
  color: var(--courses-ink-muted);
  line-height: 1.5;
}
.cluster-partner-banner .partner-placeholder-box {
  margin-bottom: 0;
  width: 380px;
  max-width: 100%;
  flex-shrink: 0;
}

/* English Tracks Sub-Grid (EP/IEP & SEP Unified in Featured English Card) */
.english-sub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 18px;
}
.english-track-card {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-md);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}
.english-track-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}
.english-track-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--courses-line);
}
.english-track-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--courses-ink);
  line-height: 1.35;
}
.english-track-badge {
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--courses-brand-soft);
  color: var(--courses-brand);
  white-space: nowrap;
  flex-shrink: 0;
}
.english-track-desc {
  font-size: 13px;
  color: var(--courses-ink-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}
.english-track-card .program-bullets {
  margin-bottom: 14px;
  flex: 1;
}

/* Robotics 3-Stage Progression Component */
.robotics-stages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 18px;
}
.stage-box {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-md);
  padding: 16px;
  position: relative;
  transition: border-color 0.2s;
  display: flex;
  flex-direction: column;
}
.stage-box:hover {
  border-color: var(--courses-cyan);
}
.stage-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.stage-badge {
  background: var(--courses-cyan-soft);
  color: var(--courses-cyan);
  border: 1px solid var(--courses-cyan-border);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
}
.stage-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--courses-ink);
}
.stage-desc {
  font-size: 12.5px;
  color: var(--courses-ink-muted);
  line-height: 1.55;
}

/* Core Stages Section */
.core-stage-card {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-lg);
  padding: 26px;
  box-shadow: var(--courses-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.core-stage-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--courses-shadow-hover);
  border-color: var(--courses-brand-border);
}
.core-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--courses-brand-soft);
  border: 1px solid var(--courses-brand-border);
  color: var(--courses-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.core-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--courses-ink);
  margin: 0 0 4px 0;
}
.core-subtitle {
  font-size: 13px;
  color: var(--courses-gold-dark);
  font-weight: 600;
  margin-bottom: 14px;
}
.core-content {
  font-size: 13.5px;
  color: var(--courses-ink-muted);
  line-height: 1.7;
}

/* Pillars / Competencies */
.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.competency-item {
  background: var(--courses-surface);
  border: 1px solid var(--courses-line);
  border-radius: var(--courses-radius-md);
  padding: 18px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.comp-icon {
  font-size: 24px;
  line-height: 1;
  padding-top: 2px;
  flex-shrink: 0;
}
.comp-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--courses-ink);
  margin-bottom: 4px;
}
.comp-desc {
  font-size: 12.5px;
  color: var(--courses-ink-muted);
  line-height: 1.5;
}

/* CTA Section */
.courses-cta-banner {
  background: linear-gradient(135deg, var(--courses-brand) 0%, var(--courses-brand-dark) 100%);
  color: #fff;
  border-radius: var(--courses-radius-xl);
  padding: 36px 32px;
  text-align: center;
  margin: 40px 0 20px;
  box-shadow: 0 15px 30px rgba(192, 0, 0, 0.2);
}
.courses-cta-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: #ffffff;
}
.courses-cta-desc {
  font-size: 15px;
  opacity: 0.95;
  max-width: 860px;
  margin: 0 auto 20px;
  color: #ffffff;
  line-height: 1.6;
  text-wrap: balance;
}
.courses-cta-btn-wrap {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.btn-cta-gold {
  background: var(--courses-gold);
  color: #000 !important;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--courses-radius-sm);
  text-decoration: none;
  font-size: 14px;
  transition: opacity 0.2s, transform 0.2s;
  display: inline-block;
}
.btn-cta-gold:hover {
  opacity: 0.95;
  transform: translateY(-2px);
}
.btn-cta-outline {
  background: rgba(255, 255, 255, 0.15);
  color: #fff !important;
  border: 1px solid rgba(255, 255, 255, 0.4);
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--courses-radius-sm);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.2s, transform 0.2s;
  display: inline-block;
}
.btn-cta-outline:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
  .courses-grid-3 { grid-template-columns: 1fr; }
  .cluster-partner-banner {
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 16px;
  }
  .cluster-partner-banner .partner-placeholder-box {
    width: 100%;
  }
}
@media (max-width: 860px) {
  .courses-hero-title { font-size: 26px; }
  .courses-hero-subtitle { font-size: 15px; }
  .courses-section-head { flex-direction: column; align-items: flex-start; }
  .courses-grid-2 { grid-template-columns: 1fr; }
  .program-card.featured { grid-column: auto; }
  .english-sub-grid { grid-template-columns: 1fr; }
  .robotics-stages { grid-template-columns: 1fr; }
  .courses-cta-banner { padding: 28px 20px; }
}