/* ═══════════════════════════════════════════════════════════════════════════
   CoSE (Centre of Space Evolution) Brand Theme Design System
   Adapted for Lunar Regolith BLSS Review — npj Microgravity Manuscript Draft
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* CoSE Primary Brand Palette */
  --cose-blue:          #3B6EA5;
  --cose-blue-light:    #5a8bc0;
  --cose-blue-dark:     #2f5985;
  --cose-teal:          #3FB6A8;
  --cose-teal-light:    #54c9ba;
  --cose-teal-dark:     #2b8c80;

  /* CoSE Accent Hexagons */
  --cose-yellow:        #f5c542;
  --cose-green:         #4caf50;
  --cose-red:           #e57373;
  --cose-orange:        #ff9800;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Lora', 'Georgia', serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* Layout */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Light Mode (Default) */
:root, [data-theme="light"] {
  --bg-app:         #f8fafc;
  --bg-surface:     #ffffff;
  --bg-elevated:    #f1f5f9;
  --bg-card:        #ffffff;
  --bg-header:      rgba(255, 255, 255, 0.92);
  --border-subtle:  rgba(0, 0, 0, 0.08);
  --border-default: #e2e8f0;
  --border-active:  var(--cose-blue);

  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #64748b;
  --text-accent:    var(--cose-blue);

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:      0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg:      0 10px 30px rgba(0,0,0,0.12);

  --badge-bg:       #e0f2fe;
  --badge-text:     #0369a1;
}

/* Dark Mode */
[data-theme="dark"], .dark {
  --bg-app:         #0b0f19;
  --bg-surface:     #111827;
  --bg-elevated:    #1f2937;
  --bg-card:        #151e2e;
  --bg-header:      rgba(17, 24, 39, 0.92);
  --border-subtle:  rgba(255, 255, 255, 0.08);
  --border-default: #1e293b;
  --border-active:  var(--cose-teal);

  --text-primary:   #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;
  --text-accent:    var(--cose-blue-light);

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:      0 4px 14px rgba(0,0,0,0.5);
  --shadow-lg:      0 10px 30px rgba(0,0,0,0.6);

  --badge-bg:       #082f49;
  --badge-text:     #38bdf8;
}

/* CoSE Header Brand Bar */
.cose-top-bar {
  background: linear-gradient(90deg, #3B6EA5 0%, #2f5985 50%, #3FB6A8 100%);
  height: 4px;
  width: 100%;
}

/* Academic Text Body */
.manuscript-body {
  font-family: 'Lora', Georgia, serif;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-primary);
}

.manuscript-body h2 {
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-subtle);
  padding-bottom: 0.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.manuscript-body h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.manuscript-body p {
  margin-bottom: 1.25rem;
  text-align: justify;
}

/* Formula Callouts */
.equation-box {
  background: var(--bg-elevated);
  border-left: 4px solid var(--cose-blue);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-family: var(--font-sans);
  overflow-x: auto;
}

/* Custom Table Styles */
.cose-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.cose-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.875rem;
}

.cose-table th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 700;
  text-align: left;
  padding: 0.875rem 1rem;
  border-bottom: 2px solid var(--border-default);
}

.cose-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: top;
}

.cose-table tr:hover td {
  background: var(--bg-elevated);
}

/* Figure Container */
.manuscript-figure {
  margin: 2.5rem 0;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.manuscript-figure:hover {
  box-shadow: var(--shadow-lg);
}

.manuscript-figure img {
  border-radius: var(--radius-md);
  width: 100%;
  max-height: 480px;
  object-fit: contain;
  background: #ffffff;
}

.manuscript-caption {
  margin-top: 1rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.manuscript-caption strong {
  color: var(--text-primary);
}