/* ==========================================================================
   A5 PLATFORM - TACTILE 3D GLASSMORPHIC DESIGN SYSTEM (OFF-WHITE ACCENTS)
   ========================================================================== */

:root {
  --bg-base: #0f1219;
  --bg-surface: #171b26;
  --bg-surface-elevated: #1e2332;
  --bg-input: #121520;
  
  /* Off-white & Warm Light Accents */
  --text-main: #f4f3ef;
  --text-muted: #9da5b4;
  --text-dim: #636b7b;
  
  --accent-offwhite: #e6e4dc;
  --accent-warm-gold: #d4af37;
  --accent-soft-blue: #388bfd;
  --accent-border: rgba(244, 243, 239, 0.12);
  --accent-border-hover: rgba(244, 243, 239, 0.28);

  /* 3D Shadows & Layering */
  --shadow-3d-outset: 0 10px 30px -5px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  --shadow-3d-inset: inset 0 2px 4px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.05);
  --shadow-btn-3d: 0 4px 0 #0b0d12, 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-btn-pressed: 0 1px 0 #0b0d12, 0 2px 4px rgba(0, 0, 0, 0.4);

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  min-height: 100vh;
  padding: 24px;
  display: flex;
  justify-content: center;
}

.app-viewport {
  width: 100%;
  max-width: 1320px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.a5-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-surface);
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-3d-outset);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-3d {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #e6e4dc 0%, #a39f93 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #0d1017;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(230, 228, 220, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-offwhite);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.brand-text .sub-caption {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid var(--accent-border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px #22c55e;
}

/* Main Workspace Grid */
.a5-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.panel {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-3d-outset);
  display: flex;
  flex-direction: column;
  gap: 28px; /* Increased gap for breathing room */
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.panel-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-offwhite);
}

/* 3D Drop Zone */
.drop-zone-3d {
  background: var(--bg-input);
  border: 2px dashed var(--accent-border);
  border-radius: var(--radius-md);
  padding: 36px 20px;
  text-align: center;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-3d-inset);
  position: relative;
}

.drop-zone-3d:hover, .drop-zone-3d.drag-over {
  border-color: var(--accent-offwhite);
  background: rgba(244, 243, 239, 0.03);
}

.icon-3d { font-size: 2.2rem; margin-bottom: 12px; }
.primary-text { font-size: 0.95rem; font-weight: 500; color: var(--text-main); margin-bottom: 6px; }
.secondary-text { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 20px; }

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

textarea, select {
  background: var(--bg-input);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  color: var(--text-main);
  font-size: 0.95rem;
  box-shadow: var(--shadow-3d-inset);
  resize: vertical;
  outline: none;
  transition: border 0.2s ease;
  line-height: 1.5;
}

textarea:focus, select:focus {
  border-color: var(--accent-offwhite);
}

.parameter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.full-width { grid-column: span 2; }

/* Checkbox Cards Grid */
.deliverables-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkbox-card-3d {
  position: relative;
  cursor: pointer;
}

.checkbox-card-3d input { position: absolute; opacity: 0; }

.card-content {
  background: var(--bg-input);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-3d-outset);
  transition: all 0.15s ease;
}

.checkbox-card-3d input:checked + .card-content {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-offwhite);
  box-shadow: 0 0 12px rgba(244, 243, 239, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.checkbox-card-3d.full-span { grid-column: span 2; }
.card-title { font-size: 0.9rem; font-weight: 500; color: var(--text-main); }
.card-icon { font-size: 1.1rem; }

/* Buttons */
.btn-3d-primary {
  width: 100%;
  padding: 18px;
  background: linear-gradient(180deg, #3a3f50 0%, #222634 100%);
  border: 1px solid var(--accent-offwhite);
  border-radius: var(--radius-md);
  color: var(--accent-offwhite);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: var(--shadow-btn-3d);
  transition: all 0.1s ease;
  margin-top: 10px;
  letter-spacing: 0.02em;
}

.btn-3d-primary:hover {
  background: linear-gradient(180deg, #444a5e 0%, #2a2f40 100%);
}

.btn-3d-primary:active {
  transform: translateY(3px);
  box-shadow: var(--shadow-btn-pressed);
}

.btn-tactile-secondary, .btn-tactile-sm {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--accent-border);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-tactile-secondary:hover, .btn-tactile-sm:hover {
  border-color: var(--accent-offwhite);
}

.btn-highlight {
  background: var(--accent-offwhite);
  color: #0d1017;
  font-weight: 600;
}

/* Output Station */
.output-station {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-3d-outset);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.station-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--accent-border);
  padding-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.tab-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.tab-btn {
  background: var(--bg-input);
  border: 1px solid var(--accent-border);
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

.tab-btn.active {
  background: var(--accent-offwhite);
  color: #0d1017;
  font-weight: 600;
  border-color: var(--accent-offwhite);
}

.output-viewport {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 28px;
  min-height: 280px;
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-3d-inset);
  position: relative;
}

.tab-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.markdown-body {
  color: var(--text-main);
  line-height: 1.7;
  font-size: 0.95rem;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  color: var(--accent-offwhite);
  margin-top: 24px;
  margin-bottom: 12px;
}

.markdown-body ul, .markdown-body ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.placeholder-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text-dim);
  text-align: center;
}

.placeholder-icon { font-size: 2.5rem; margin-bottom: 14px; }
.hidden { display: none !important; }
.file-info-badge { display: flex; align-items: center; justify-content: space-between; background: var(--bg-surface-elevated); padding: 10px 16px; border-radius: var(--radius-sm); border: 1px solid var(--accent-offwhite); }
.btn-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; }

/* ==========================================================================
   MOBILE RESPONSIVENESS FIXES (ALIGNED & SPACIOUS)
   ========================================================================== */
@media (max-width: 768px) {
  body {
    padding: 12px; /* Less padding on outer body for mobile */
  }

  .a5-workspace { 
    grid-template-columns: 1fr; /* Stack left and right panels */
  }
  
  .a5-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  
  .system-status {
    align-self: flex-start; /* Align status badge to left on mobile */
  }

  .panel {
    padding: 20px; /* Adjust padding for mobile screens */
  }

  /* Fix Form Elements Stacking */
  .parameter-grid { 
    grid-template-columns: 1fr; /* Stack dropdowns vertically */
    gap: 16px;
  }
  .full-width { 
    grid-column: span 1; /* Remove 2-column span */
  }

  /* Fix Checkbox Cards Stacking */
  .deliverables-grid { 
    grid-template-columns: 1fr; /* Stack cards vertically */
    gap: 12px;
  }
  .checkbox-card-3d.full-span { 
    grid-column: span 1; /* Remove 2-column span */
  }

  .tab-actions {
    justify-content: flex-start; /* Align export buttons neatly */
  }
}