/* ============================================================
   FORMLABS 4B PRINTER COST CALCULATOR — DARK MEDICAL THEME
   ============================================================ */

:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-card-hover: #1f242d;
  --border-color: #30363d;
  
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
  --accent-glow: rgba(14, 165, 233, 0.15);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #f43f5e;
  --info: #8b5cf6;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: 40px;
}

/* ============================================================
   TYPOGRAPHY & UTILITIES
   ============================================================ */
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.02em; }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-muted { color: var(--text-muted); }
.text-amber { color: var(--warning); }
.text-success { color: var(--success); }
.text-center { text-align: center; }
.w-100 { width: 100%; }

.flex-between { display: flex; justify-content: space-between; align-items: center; }
.align-center { align-items: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }

.hidden { display: none !important; }

/* ============================================================
   LAYOUT CONTAINER & HEADER
   ============================================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  margin-bottom: 1.5rem;
}

.brand-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.brand-logo-img {
  height: 84px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 2px 8px rgba(14, 165, 233, 0.3));
}

.sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
}
.sync-badge.synced { background: rgba(16, 185, 129, 0.15); border-color: var(--success); color: var(--success); }
.sync-badge.local { background: rgba(245, 158, 11, 0.15); border-color: var(--warning); color: var(--warning); }
.dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ============================================================
   NAVIGATION TABS
   ============================================================ */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  padding-bottom: 0.25rem;
}

.nav-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.nav-tab-btn:hover {
  color: var(--text-main);
  background: var(--bg-card);
}

.nav-tab-btn.active {
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

/* ============================================================
   CARDS & PANELS
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   FORMS & INPUTS
   ============================================================ */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-control {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.55rem 0.75rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

.checkbox-group input { accent-color: var(--accent); width: 1rem; height: 1rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-outline { background: transparent; border-color: var(--border-color); color: var(--text-main); }
.btn-outline:hover { background: var(--bg-card-hover); border-color: var(--text-muted); }

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.775rem; }
.btn-icon { padding: 0.35rem 0.5rem; }

/* ============================================================
   BADGES & TAGS
   ============================================================ */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.725rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
}
.badge-open { background: var(--info); }
.badge-custom { background: #64748b; }
.badge-danger { background: var(--danger); }
.badge-success { background: var(--success); }

.tag {
  display: inline-block;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.725rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  margin-right: 0.25rem;
  margin-bottom: 0.25rem;
}

/* ============================================================
   COST SUMMARY OUTPUT BOXES
   ============================================================ */
.output-card {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  margin-bottom: 0.75rem;
}

.output-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
}

.output-value.highlight {
  font-size: 1.75rem;
  color: var(--success);
}

.purpose-banner {
  background: var(--accent-glow);
  border: 1px solid rgba(14, 165, 233, 0.3);
  color: var(--accent);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  margin-bottom: 1rem;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-responsive { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th, .data-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.data-table th {
  background: var(--bg-dark);
  color: var(--text-muted);
  font-weight: 500;
}
.data-table tr:hover { background: var(--bg-card-hover); }

/* ============================================================
   RESIN CARDS GRID
   ============================================================ */
.resins-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.resin-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.resin-card-header { display: flex; justify-content: space-between; margin-bottom: 0.5rem; }
.resin-title { font-size: 1.05rem; color: var(--text-main); }
.resin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}
.resin-tag {
  display: inline-block;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  text-transform: capitalize;
}
.resin-card-actions { display: flex; gap: 0.5rem; justify-content: flex-end; }


/* ============================================================
   MODALS
   ============================================================ */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.5rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

/* ============================================================
   WIZARD CARDS
   ============================================================ */
.wizard-option-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.wizard-option-card:hover { border-color: var(--text-muted); }
.wizard-option-card.selected { border-color: var(--accent); background: var(--accent-glow); }
.wizard-option-icon { font-size: 1.75rem; }
.wizard-option-content h4 { font-size: 0.95rem; }
.wizard-option-content p { font-size: 0.775rem; color: var(--text-muted); }

.wizard-progress {
  height: 4px;
  background: var(--bg-dark);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.wizard-progress-bar { height: 100%; background: var(--accent); transition: width 0.3s ease; }

/* ============================================================
   TOASTS
   ============================================================ */
#toast-container {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  animation: slideIn 0.3s ease;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.warning-box {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid var(--warning);
  color: var(--warning);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
}

.success-box {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
}

.code-item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}
.code-badge {
  font-family: monospace;
  background: var(--bg-dark);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  color: var(--accent);
}

/* ============================================================
   APP FOOTER STYLES
   ============================================================ */
.app-footer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
}
.app-footer a {
  color: var(--accent);
  text-decoration: underline;
}
.app-footer a:hover {
  opacity: 0.85;
}

@media (max-width: 600px) {
  .brand-logo-img {
    height: 64px;
  }
}

/* ============================================================
   TOOLTIP FORMULA EXPLANATIONS
   ============================================================ */
.has-tooltip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  cursor: help;
}

.tooltip-icon-emoji {
  font-size: 0.85rem;
  line-height: 1;
  cursor: help;
}

.has-tooltip .tooltip-box {
  visibility: hidden;
  opacity: 0;
  width: 290px;
  background-color: #0f172a;
  color: #f8fafc;
  text-align: left;
  border-radius: 8px;
  padding: 10px 12px;
  position: absolute;
  z-index: 9999;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  font-weight: normal;
  line-height: 1.4;
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
  border: 1px solid var(--border-color);
  transition: opacity 0.2s, visibility 0.2s;
  pointer-events: none;
  white-space: normal;
}

.has-tooltip .tooltip-box::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -6px;
  border-width: 6px;
  border-style: solid;
  border-color: #0f172a transparent transparent transparent;
}

.has-tooltip:hover .tooltip-box,
.has-tooltip:focus-within .tooltip-box {
  visibility: visible;
  opacity: 1;
}

.table-responsive {
  overflow-x: auto;
  overflow-y: visible;
}