/* ==========================================================================
   Utilivox.com — Interactive Tool & Calculator Workspace Stylesheet
   Precision Engineering, Accessible Controls & Clean Metric Visualizations
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Interactive Workspace Grid Layout
   -------------------------------------------------------------------------- */
.tool-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: start;
  margin: 2rem 0 3.5rem;
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

/* Tool Workspace Panels */
.tool-panel {
  background: var(--neutral-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.tool-panel-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--neutral-900);
  margin-bottom: 1.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: -0.015em;
}

/* Tool Header Meta Bar */
.tool-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1.5rem 0 2rem;
  padding: 0.85rem 1.25rem;
  background: var(--neutral-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.845rem;
  color: var(--text-muted);
  box-shadow: var(--shadow-xs);
}

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

.tool-meta-item strong {
  color: var(--neutral-900);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   2. Modern Form Inputs & Parameter Controls
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: 1.35rem;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neutral-800);
  margin-bottom: 0.45rem;
}

.form-label .required-star {
  color: var(--color-error);
  margin-left: 0.15rem;
}

.form-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* Input Fields */
.form-control {
  width: 100%;
  height: 44px;
  padding: 0.65rem 0.95rem;
  font-size: 0.95rem;
  color: var(--neutral-900);
  background: var(--neutral-white);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: var(--neutral-white);
}

.form-control::placeholder {
  color: var(--neutral-400);
}

/* Dropdown Selects */
select.form-control, select.form-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 16px 16px;
  padding-right: 2.5rem;
  cursor: pointer;
}

/* Textarea Controls */
textarea.form-control {
  height: auto;
  min-height: 140px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  padding: 0.85rem 1rem;
}

/* Seamless Input Groups (Values + Units) */
.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
  border-radius: var(--radius-md);
}

.input-group .form-control {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  flex: 1;
}

.input-group-addon {
  display: flex;
  align-items: center;
  padding: 0 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1.5px solid var(--border-subtle);
  border-left: 0;
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.input-group select.form-select {
  border-left: 0;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  background-color: var(--bg-subtle);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--neutral-700);
  cursor: pointer;
  max-width: 140px;
}

/* Range Sliders */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-subtle);
  border-radius: var(--radius-full);
  outline: none;
  margin: 0.75rem 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--brand-blue);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.3);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Swap Units Button */
.btn-swap-units {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-subtle);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--neutral-700);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-swap-units:hover {
  background: var(--brand-blue-light);
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  transform: rotate(180deg);
}

/* --------------------------------------------------------------------------
   3. Buttons & Action Rows
   -------------------------------------------------------------------------- */
.button-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  user-select: none;
  line-height: 1.25;
}

.btn-primary {
  background: linear-gradient(180deg, #1e40af 0%, #1e3a8a 100%);
  color: #ffffff;
  border-color: #1e3a8a;
  box-shadow: 0 2px 4px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #2563eb 0%, #1e40af 100%);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(30, 58, 138, 0.25);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--neutral-white);
  color: var(--neutral-700);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  color: var(--neutral-900);
  border-color: var(--neutral-400);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   4. Executive Calculation Results Card
   -------------------------------------------------------------------------- */
.result-card {
  background: radial-gradient(circle at 50% 0%, #ffffff 0%, var(--bg-subtle) 100%);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  text-align: center;
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #1e3a8a 0%, #2563eb 50%, #0d9488 100%);
}

.result-label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.result-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  font-feature-settings: "tnum" on, "lnum" on;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 700;
  background: #dbeafe;
  color: #1e40af;
  margin-bottom: 1.5rem;
  border: 1px solid #bfdbfe;
}

.result-badge.badge-success {
  background: #dcfce7;
  color: #166534;
  border-color: #bbf7d0;
}

.result-badge.badge-warning {
  background: #fef3c7;
  color: #92400e;
  border-color: #fde68a;
}

.result-badge.badge-danger {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fecaca;
}

.result-details {
  text-align: left;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.result-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0;
  border-bottom: 1px dashed rgba(226, 232, 240, 0.7);
}

.result-detail-row:last-child {
  border-bottom: none;
}

.result-detail-row span:first-child {
  color: var(--text-muted);
}

.result-detail-row span:last-child {
  font-weight: 700;
  color: var(--neutral-900);
}

/* --------------------------------------------------------------------------
   5. Developer & Text Utilities Workspace
   -------------------------------------------------------------------------- */
.utility-workspace {
  display: flex;
  flex-direction: column;
}

.stat-metric-badge {
  background: var(--neutral-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.stat-metric-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.stat-metric-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1.2;
}

/* Toast Notification for Clipboard Copy */
.copy-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #0f172a;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 9999;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-fast);
  pointer-events: none;
}

.copy-toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   6. Fluid & Mobile Responsive Tool Workspace Layout
   -------------------------------------------------------------------------- */
.tool-header {
  margin: 1.5rem 0 2rem;
}

.tool-header-title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  color: var(--neutral-900);
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  word-break: break-word;
}

.tool-header-desc {
  font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 820px;
  line-height: 1.6;
}

.converter-units-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.85rem;
  align-items: end;
  margin-bottom: 1.5rem;
}

.tool-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  text-align: center;
  margin-top: 1rem;
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 1.25rem 0 2.5rem;
  }
}

@media (max-width: 680px) {
  .converter-units-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  .converter-units-grid .btn-swap-units {
    margin: 0.25rem auto;
    transform: rotate(90deg);
  }
  .converter-units-grid .btn-swap-units:hover {
    transform: rotate(270deg);
  }
  .tool-stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .tool-meta-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .tool-meta-bar .tool-meta-item:last-child {
    margin-left: 0 !important;
  }
  .tool-panel {
    padding: 1.35rem;
  }
  .button-row {
    flex-direction: column;
    width: 100%;
  }
  .button-row .btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
  }
  .result-card {
    padding: 1.75rem 1.25rem;
  }
  .result-value {
    font-size: clamp(2rem, 7.5vw, 2.75rem);
    word-break: break-word;
  }
}

@media (max-width: 420px) {
  .tool-panel {
    padding: 1.15rem;
  }
  .tool-panel-title {
    font-size: 1.1rem;
  }
  .stat-metric-badge {
    padding: 0.75rem 0.5rem;
  }
  .stat-metric-num {
    font-size: 1.35rem;
  }
}