/* ============================================================
   Course Navigation Landing Page
   Audience: Vietnamese teachers. Clean, premium, modern.
   ============================================================ */

/* MuseoRMITVN — RMIT brand heading font (all weights) */
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-300.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-500.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-700.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Design Tokens ---------- */
:root {
  /* — RMIT Brand Colours — */
  --rmit-blue: #000054;      /* RMIT Blue — primary */
  --rmit-red:  #E61E2A;      /* RMIT Red  — accent  */

  /* Neutrals */
  --bg:       #F8F9FC;       /* Light, clean slate background */
  --panel:    #ffffff;
  --bg-soft:  #F4F4F9;
  --bg-softer:#FAFAFC;

  /* Ink / text */
  --ink:   #0d0d26;          /* Ink — deep navy/black */
  --ink-2: #33334d;          /* body text */
  --ink-3: #6e6e8c;          /* muted labels */

  /* Lines */
  --line:   #E2E2EC;
  --line-2: #C8C8DC;

  /* Brand Interaction */
  --brand:       #000054;
  --brand-hover: #00003A;
  --brand-ink:   #000054;
  --brand-tint:  #EBEBF5;
  --brand-tint-2:#D6D6EC;

  /* Accent (RMIT Red) */
  --accent:       #E61E2A;
  --accent-hover: #C4191F;
  --accent-tint:  #FDECED;

  /* Semantic */
  --ok:      #1A7D4F;
  --ok-tint: #E7F3EC;

  /* Effects */
  --ring:      0 0 0 4px rgba(0, 0, 84, 0.14);
  --shadow-sm: 0 2px 4px rgba(0, 0, 40, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 40, 0.06);
  --shadow-lg: 0 20px 48px rgba(0, 0, 40, 0.12);

  /* Radius */
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 18px;

  --transition-speed: 0.4s;
  --transition-cubic: cubic-bezier(0.25, 1, 0.5, 1);
}

/* ---------- Basic Reset & Layout ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'MuseoRMITVN', 'Quicksand', Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--rmit-blue);
  text-wrap: balance;
}

p {
  color: var(--ink-2);
}

strong { font-weight: 600; color: var(--ink); }
a { color: var(--brand); text-decoration: none; }

/* ---------- Main Container ---------- */
.portal-container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ---------- Logo Header Row ---------- */
.portal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.25rem;
}

.logo-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-img {
  height: auto;
  max-height: 42px;
  object-fit: contain;
}

.logo-moet {
  max-width: 160px;
}

.logo-rmit {
  max-width: 110px;
}

/* ---------- Course Banner (Canvas Style) ---------- */
.course-banner {
  position: relative;
  width: 100%;
  height: 380px;
  border-radius: var(--border-radius-lg);
  background: url('banner3.png') no-repeat center center;
  background-size: cover;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 84, 0.4), rgba(0, 0, 84, 0.1));
}

/* Floating Banner Card */
.banner-card {
  position: absolute;
  top: 50%;
  left: 2.5rem;
  transform: translateY(-50%);
  max-width: 620px;
  background: var(--panel);
  padding: 1.75rem 2rem;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 6px solid var(--rmit-blue);
  z-index: 10;
  animation: fadeInCenter 0.8s var(--transition-cubic) both;
}

@keyframes fadeInCenter {
  from { opacity: 0; transform: translateY(-46%); }
  to { opacity: 1; transform: translateY(-50%); }
}

.banner-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--rmit-blue);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.banner-subtitle {
  display: inline-block;
  background: var(--rmit-red);
  color: white;
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* Corner RMIT Brandmark in Banner */
.banner-brandmark {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 90px;
  height: 90px;
  background: var(--rmit-blue);
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 0.75rem;
  z-index: 5;
}

.banner-brandmark img {
  width: 32px;
  height: auto;
}

/* ---------- Quick Summary Card ---------- */
.summary-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  padding: 2.25rem 2.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.summary-text {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink-2);
}

.summary-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.meta-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 1.1rem;
}

.meta-info {
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 0.75rem;
  color: var(--ink-3);
  font-weight: 600;
  text-transform: uppercase;
}

.meta-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

/* Action Buttons Group */
.button-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.22s var(--transition-cubic);
}

.btn-primary {
  background-color: var(--brand);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--brand-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 84, 0.2);
}

.btn-secondary {
  background-color: var(--panel);
  color: var(--brand);
  border-color: var(--line-2);
}

.btn-secondary:hover {
  background-color: var(--bg-soft);
  border-color: var(--brand);
  transform: translateY(-2px);
}

.icon {
  width: 20px;
  height: 20px;
}

/* ---------- Modules Section ---------- */
.section-title-wrapper {
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--rmit-blue);
  position: relative;
  display: inline-block;
  padding-bottom: 0.5rem;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 4px;
  background: var(--rmit-red);
  border-radius: 2px;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.module-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.3s var(--transition-cubic);
  cursor: pointer;
}

.module-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-tint-2);
  box-shadow: var(--shadow-lg);
}

.module-card.recommended {
  border-color: rgba(199, 121, 45, 0.32);
}

.module-card.recommended .module-cta-btn {
  color: #8a551d;
}

.module-card.completed {
  border-color: rgba(47, 127, 112, 0.35);
}

.module-card.in-progress {
  border-color: rgba(0, 0, 84, 0.22);
}

.module-img-container {
  width: 100%;
  height: 130px;
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
}

.module-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--transition-cubic);
}

.module-card:hover .module-img {
  transform: scale(1.04);
}

.module-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(0, 0, 84, 0.85);
  backdrop-filter: blur(4px);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.module-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.9rem;
}

.module-title {
  min-height: 7rem;
  display: flex;
  align-items: flex-start;
}

.module-title-link {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--rmit-blue);
  line-height: 1.4;
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color 0.2s, color 0.2s;
}

.module-card:hover .module-title-link {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.module-desc {
  font-size: 0.94rem;
  color: var(--ink-2);
  line-height: 1.6;
  flex: 1;
}

.module-progress-track {
  width: 100%;
  height: 0.5rem;
  overflow: hidden;
  border-radius: 999px;
  background: #e4e6f0;
}

.module-progress-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--rmit-blue);
}

.module-simple-progress {
  display: grid;
  gap: 0.35rem;
  margin-top: auto;
}

.module-simple-progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--ink-3);
  font-size: 0.78rem;
  font-weight: 700;
}

.module-simple-progress-row strong {
  color: var(--rmit-blue);
  font-size: 0.84rem;
  font-weight: 800;
}

.module-simple-progress[data-status="completed"] .module-progress-fill {
  background: #2f7f70;
}

.results-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-left: 5px solid var(--rmit-red);
  border-radius: var(--border-radius-lg);
  background:
    linear-gradient(135deg, rgba(230, 30, 42, 0.07), transparent 22rem),
    var(--panel);
  box-shadow: var(--shadow-md);
}

.results-callout-copy {
  display: grid;
  gap: 0.35rem;
}

.results-kicker {
  color: var(--rmit-red);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.results-callout h3 {
  color: var(--rmit-blue);
  font-size: 1.35rem;
  font-weight: 700;
}

.results-callout p {
  max-width: 680px;
  color: var(--ink-2);
  font-size: 0.96rem;
}

.results-callout-button {
  flex: 0 0 auto;
  min-height: 3rem;
  padding-inline: 1.3rem;
}

.module-sequence-warning-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(0, 0, 35, 0.52);
}

.module-sequence-warning-overlay.open {
  display: flex;
}

.module-sequence-warning {
  position: relative;
  width: min(460px, 100%);
  padding: 1.75rem;
  border-radius: var(--border-radius-md);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
}

.module-warning-close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
}

.module-warning-kicker {
  display: block;
  margin-bottom: 0.55rem;
  color: #8a551d;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.module-sequence-warning h3 {
  margin: 0 2rem 0.75rem 0;
  color: var(--rmit-blue);
  font-size: 1.35rem;
  line-height: 1.25;
}

.module-sequence-warning p {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.98rem;
  line-height: 1.6;
}

.module-warning-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.module-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--ink-3);
  font-weight: 600;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.module-meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.module-btn-row {
  display: flex;
  justify-content: flex-start;
  margin-top: 0.5rem;
}

.module-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--brand);
  transition: all 0.2s;
}

.module-card:hover .module-cta-btn {
  color: var(--accent);
}

.module-cta-btn svg {
  transition: transform 0.2s;
}

.module-card:hover .module-cta-btn svg {
  transform: translateX(4px);
}

/* ---------- Drawer Component (Tài liệu tham khảo) ---------- */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 40, 0.45);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 440px;
  background: var(--panel);
  z-index: 999;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-speed) var(--transition-cubic);
}

.drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--rmit-blue);
}

.btn-close {
  background: none;
  border: none;
  font-size: 1.8rem;
  font-weight: 300;
  cursor: pointer;
  color: var(--ink-3);
  transition: color 0.2s;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.btn-close:hover {
  color: var(--accent);
  background: var(--bg-soft);
}

.drawer-content {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.resource-section {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.resource-section h4 {
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--rmit-red);
  font-weight: 700;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.4rem;
}

.resource-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.resource-link {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
  background: var(--bg-softer);
  border: 1px solid var(--line);
  transition: all 0.2s;
}

.resource-link:hover {
  background: var(--brand-tint);
  border-color: var(--brand-tint-2);
}

.file-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.resource-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.res-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.res-desc {
  font-size: 0.78rem;
  color: var(--ink-3);
  line-height: 1.4;
}

/* ---------- Modal Component (Hướng dẫn chương trình) ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 40, 0.45);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--panel);
  border-radius: var(--border-radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  opacity: 0;
  transition: all 0.3s var(--transition-cubic);
}

.modal-overlay.open .modal {
  transform: scale(1);
  opacity: 1;
}

.modal-header {
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--rmit-blue);
}

.modal-body {
  padding: 1.75rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.guide-block h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 0.5rem;
}

.guide-block p, .guide-block li {
  font-size: 0.94rem;
  color: var(--ink-2);
  line-height: 1.6;
}

.guide-block ul {
  padding-left: 1.25rem;
  margin-top: 0.4rem;
}

.modal-footer {
  padding: 1.25rem 1.75rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: flex-end;
}

/* ---------- Animations ---------- */
@keyframes slideInUp {
  from {
    transform: translateY(24px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ---------- Responsive Adjustments ---------- */
@media (max-width: 1024px) {
  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (max-width: 680px) {
  .modules-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 768px) {
  .portal-container {
    padding: 1.5rem 1rem;
    gap: 1.5rem;
  }

  .portal-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .course-banner {
    height: auto;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
  }

  .banner-overlay {
    background: linear-gradient(to top, rgba(0, 0, 84, 0.8), rgba(0, 0, 84, 0.2));
  }

  .banner-card {
    position: static;
    max-width: 100%;
    padding: 1.25rem 1.5rem;
    border-radius: var(--border-radius-sm);
  }

  .banner-title {
    font-size: 1.4rem;
  }

  .banner-brandmark {
    display: none; /* Hide to prevent overlaying text on mobile */
  }

  .summary-card {
    padding: 1.5rem;
  }

  .summary-text {
    font-size: 0.96rem;
  }

  .results-callout {
    flex-direction: column;
    align-items: stretch;
  }

  .results-callout-button {
    width: 100%;
  }
}