/**
 * Calculator Dashboard - Modern Single-Screen Layout
 * Glassmorphism, CSS Grid, and Progressive Enhancement
 */

/* ===== CSS Custom Properties ===== */
:root {
  --calc-bg: var(--pc-surface, #ffffff);
  --calc-bg-gradient: linear-gradient(135deg, 
    var(--pc-surface, #ffffff) 0%, 
    var(--pc-muted, #f8fafc) 100%);
  --calc-card-bg: var(--pc-surface, #ffffff);
  --calc-glass-bg: var(--pc-surface, #ffffff);
  --calc-glass-border: var(--pc-border, #e2e8f0);
  --calc-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --calc-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --calc-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --calc-shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --calc-primary: var(--pc-accent, #6366f1);
  --calc-primary-light: #818cf8;
  --calc-primary-dark: #4f46e5;
  --calc-success: #10b981;
  --calc-warning: #f59e0b;
  --calc-danger: #ef4444;
  --calc-info: #3b82f6;
  --calc-text: var(--pc-text, #1e293b);
  --calc-text-muted: var(--pc-text-secondary, #64748b);
  --calc-border: var(--pc-border, #e2e8f0);
  --calc-radius-sm: 8px;
  --calc-radius: 12px;
  --calc-radius-lg: 16px;
  --calc-radius-xl: 24px;
  --calc-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --calc-transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --calc-bg: var(--pc-surface, #0f172a);
  --calc-bg-gradient: linear-gradient(135deg, 
    var(--pc-surface, #0f172a) 0%, 
    #1e293b 100%);
  --calc-card-bg: var(--pc-surface, #1e293b);
  --calc-glass-bg: var(--pc-surface, #1e293b);
  --calc-glass-border: var(--pc-border, #334155);
  --calc-shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);
}

/* ===== Dashboard Layout ===== */
.pc-calc-dashboard {
  display: grid;
  grid-template-columns: 320px 1fr 340px;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "header header header"
    "inputs main results";
  gap: 1.5rem;
  min-height: calc(100vh - 140px);
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem;
  background: var(--calc-bg-gradient);
}

@media (max-width: 1200px) {
  .pc-calc-dashboard {
    grid-template-columns: 280px 1fr;
    grid-template-areas:
      "header header"
      "inputs main"
      "results results";
  }
}

@media (max-width: 768px) {
  .pc-calc-dashboard {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "inputs"
      "results"
      "main";
    gap: 1rem;
    padding: 1rem;
  }
}

/* ===== Dashboard Header ===== */
.pc-calc-header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--calc-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--calc-glass-border);
  border-radius: var(--calc-radius-lg);
  box-shadow: var(--calc-shadow);
}

.pc-calc-header__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pc-calc-header__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--calc-primary), var(--calc-primary-light));
  border-radius: var(--calc-radius);
  box-shadow: var(--calc-shadow-glow);
}

.pc-calc-header__text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--calc-text);
  margin: 0;
  line-height: 1.2;
}

.pc-calc-header__text p {
  font-size: 0.8125rem;
  color: var(--calc-text-muted);
  margin: 0;
}

.pc-calc-header__actions {
  display: flex;
  gap: 0.5rem;
}

/* ===== Quick Actions Bar ===== */
.pc-calc-quick-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--calc-radius);
}

[data-theme="dark"] .pc-calc-quick-actions {
  background: rgba(0, 0, 0, 0.2);
}

.pc-calc-action-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--calc-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--calc-radius-sm);
  cursor: pointer;
  transition: var(--calc-transition);
}

.pc-calc-action-btn:hover {
  color: var(--calc-text);
  background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .pc-calc-action-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.pc-calc-action-btn--primary {
  color: white;
  background: var(--calc-primary);
}

.pc-calc-action-btn--primary:hover {
  background: var(--calc-primary-dark);
  color: white;
}

/* ===== Input Panel ===== */
.pc-calc-inputs {
  grid-area: inputs;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pc-calc-panel {
  background: var(--calc-card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--calc-glass-border);
  border-radius: var(--calc-radius-lg);
  box-shadow: var(--calc-shadow);
  overflow: hidden;
}

.pc-calc-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.08), transparent);
  border-bottom: 1px solid var(--calc-glass-border);
}

.pc-calc-panel__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--calc-text);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.pc-calc-panel__icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  background: rgba(99, 102, 241, 0.15);
  border-radius: var(--calc-radius-sm);
}

.pc-calc-panel__content {
  padding: 1.25rem;
}

/* ===== Form Fields ===== */
.pc-calc-field {
  margin-bottom: 1rem;
}

.pc-calc-field:last-child {
  margin-bottom: 0;
}

.pc-calc-field__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--calc-text);
}

.pc-calc-field__hint {
  font-size: 0.6875rem;
  color: var(--calc-text-muted);
  font-weight: 400;
}

.pc-calc-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--calc-text);
  background: var(--calc-glass-bg);
  border: 1.5px solid var(--calc-border);
  border-radius: var(--calc-radius);
  transition: var(--calc-transition);
}

.pc-calc-input:hover {
  border-color: var(--calc-primary-light);
}

.pc-calc-input:focus {
  outline: none;
  border-color: var(--calc-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.pc-calc-input--number {
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', monospace;
}

select.pc-calc-input {
  cursor: pointer;
  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 0.75rem center;
  padding-right: 2.5rem;
}

/* ===== Quick Value Chips ===== */
.pc-calc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.pc-calc-chip {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--calc-text-muted);
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid transparent;
  border-radius: 9999px;
  cursor: pointer;
  transition: var(--calc-transition);
}

.pc-calc-chip:hover {
  color: var(--calc-primary);
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--calc-primary-light);
}

.pc-calc-chip--active {
  color: white;
  background: var(--calc-primary);
}

/* ===== Results Panel ===== */
.pc-calc-results {
  grid-area: results;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pc-calc-result-card {
  position: relative;
  padding: 1.25rem;
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.05) 0%, 
    rgba(99, 102, 241, 0.02) 100%);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--calc-radius);
  transition: var(--calc-transition);
}

.pc-calc-result-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--calc-shadow);
  border-color: rgba(99, 102, 241, 0.3);
}

.pc-calc-result-card--primary {
  background: linear-gradient(135deg, 
    var(--calc-primary) 0%, 
    var(--calc-primary-dark) 100%);
  border-color: transparent;
  color: white;
}

.pc-calc-result-card--primary .pc-calc-result__label,
.pc-calc-result-card--primary .pc-calc-result__unit {
  color: rgba(255, 255, 255, 0.8);
}

.pc-calc-result-card--success {
  background: linear-gradient(135deg, 
    rgba(16, 185, 129, 0.1) 0%, 
    rgba(16, 185, 129, 0.05) 100%);
  border-color: rgba(16, 185, 129, 0.3);
}

.pc-calc-result-card--warning {
  background: linear-gradient(135deg, 
    rgba(245, 158, 11, 0.1) 0%, 
    rgba(245, 158, 11, 0.05) 100%);
  border-color: rgba(245, 158, 11, 0.3);
}

.pc-calc-result__label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--calc-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.pc-calc-result__value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--calc-text);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.pc-calc-result-card--primary .pc-calc-result__value {
  color: white;
}

.pc-calc-result__unit {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--calc-text-muted);
  margin-left: 0.25rem;
}

.pc-calc-result__context {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--calc-text-muted);
}

/* ===== Main Content Area ===== */
.pc-calc-main {
  grid-area: main;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
}

/* ===== Visualization Area ===== */
.pc-calc-viz {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--calc-card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--calc-glass-border);
  border-radius: var(--calc-radius-lg);
  box-shadow: var(--calc-shadow);
  overflow: hidden;
}

.pc-calc-viz__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.pc-calc-viz__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--calc-text);
}

/* ===== Formula Display ===== */
.pc-calc-formula {
  padding: 1rem 1.25rem;
  background: rgba(99, 102, 241, 0.05);
  border-radius: var(--calc-radius);
  margin-bottom: 1rem;
}

.pc-calc-formula__label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--calc-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.pc-calc-formula__math {
  font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', monospace;
  font-size: 0.875rem;
  color: var(--calc-text);
  line-height: 1.6;
}

.pc-calc-formula__highlight {
  color: var(--calc-primary);
  font-weight: 600;
}

/* ===== Drug Info Card ===== */
.pc-calc-drug-info {
  padding: 1.25rem;
  background: linear-gradient(135deg, 
    rgba(59, 130, 246, 0.05) 0%, 
    rgba(59, 130, 246, 0.02) 100%);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--calc-radius);
}

.pc-calc-drug-info__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.pc-calc-drug-info__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: rgba(59, 130, 246, 0.15);
  border-radius: var(--calc-radius);
}

.pc-calc-drug-info__name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--calc-text);
}

.pc-calc-drug-info__category {
  font-size: 0.75rem;
  color: var(--calc-text-muted);
}

.pc-calc-drug-info__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.pc-calc-drug-info__item {
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--calc-radius-sm);
}

[data-theme="dark"] .pc-calc-drug-info__item {
  background: rgba(0, 0, 0, 0.2);
}

.pc-calc-drug-info__label {
  font-size: 0.6875rem;
  color: var(--calc-text-muted);
  margin-bottom: 0.25rem;
}

.pc-calc-drug-info__value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--calc-text);
}

/* ===== Safety Alerts ===== */
.pc-calc-alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-radius: var(--calc-radius);
  margin-bottom: 1rem;
}

.pc-calc-alert--warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.pc-calc-alert--error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.pc-calc-alert--success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.pc-calc-alert__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
}

.pc-calc-alert__content {
  flex: 1;
}

.pc-calc-alert__title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.pc-calc-alert--warning .pc-calc-alert__title { color: var(--calc-warning); }
.pc-calc-alert--error .pc-calc-alert__title { color: var(--calc-danger); }
.pc-calc-alert--success .pc-calc-alert__title { color: var(--calc-success); }

.pc-calc-alert__text {
  font-size: 0.8125rem;
  color: var(--calc-text-muted);
  line-height: 1.5;
}

/* ===== Calculate Button ===== */
.pc-calc-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, var(--calc-primary), var(--calc-primary-dark));
  border: none;
  border-radius: var(--calc-radius);
  cursor: pointer;
  transition: var(--calc-transition);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.pc-calc-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.pc-calc-submit:active {
  transform: translateY(0);
}

.pc-calc-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ===== Progress Bar ===== */
.pc-calc-progress {
  height: 4px;
  background: var(--calc-border);
  border-radius: 2px;
  overflow: hidden;
  margin: 1rem 0;
}

.pc-calc-progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--calc-primary), var(--calc-primary-light));
  border-radius: 2px;
  transition: width 0.3s ease;
}

/* ===== Related Tools ===== */
.pc-calc-related {
  padding: 1rem;
}

.pc-calc-related__title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--calc-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.pc-calc-related__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.pc-calc-related__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--calc-text);
  background: var(--calc-glass-bg);
  border: 1px solid var(--calc-glass-border);
  border-radius: var(--calc-radius-sm);
  text-decoration: none;
  transition: var(--calc-transition);
}

.pc-calc-related__item:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateX(2px);
}

.pc-calc-related__icon {
  font-size: 1rem;
}

/* ===== Animation Classes ===== */
@keyframes calc-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes calc-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(99, 102, 241, 0);
  }
}

@keyframes calc-shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.pc-calc-animate {
  animation: calc-fade-in 0.4s ease-out forwards;
}

.pc-calc-animate--1 { animation-delay: 0.05s; }
.pc-calc-animate--2 { animation-delay: 0.1s; }
.pc-calc-animate--3 { animation-delay: 0.15s; }
.pc-calc-animate--4 { animation-delay: 0.2s; }

.pc-calc-pulse {
  animation: calc-pulse 2s infinite;
}

/* ===== Loading State ===== */
.pc-calc-loading {
  position: relative;
  overflow: hidden;
}

.pc-calc-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  background-size: 200% 100%;
  animation: calc-shimmer 1.5s infinite;
}

/* ===== Copy Button ===== */
.pc-calc-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--calc-text-muted);
  background: transparent;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  cursor: pointer;
  transition: var(--calc-transition);
}

.pc-calc-copy:hover {
  color: var(--calc-primary);
  border-color: var(--calc-primary);
  background: rgba(99, 102, 241, 0.05);
}

.pc-calc-copy--copied {
  color: var(--calc-success);
  border-color: var(--calc-success);
  background: rgba(16, 185, 129, 0.1);
}

/* ===== Toggle Switch ===== */
.pc-calc-toggle {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.pc-calc-toggle__switch {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--calc-border);
  border-radius: 12px;
  transition: var(--calc-transition);
}

.pc-calc-toggle__switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: var(--calc-transition);
  box-shadow: var(--calc-shadow-sm);
}

.pc-calc-toggle input:checked + .pc-calc-toggle__switch {
  background: var(--calc-primary);
}

.pc-calc-toggle input:checked + .pc-calc-toggle__switch::after {
  transform: translateX(20px);
}

.pc-calc-toggle__label {
  font-size: 0.875rem;
  color: var(--calc-text);
}

/* ===== Print Styles ===== */
@media print {
  .pc-calc-dashboard {
    display: block;
    padding: 0;
  }
  
  .pc-calc-header,
  .pc-calc-inputs,
  .pc-calc-action-btn {
    display: none;
  }
  
  .pc-calc-results {
    display: block;
  }
  
  .pc-calc-panel {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ===== Toast Notifications ===== */
.pc-toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.pc-toast {
  padding: 0.875rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: white;
  background: var(--calc-text);
  border-radius: var(--calc-radius);
  box-shadow: var(--calc-shadow-lg);
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
  pointer-events: auto;
}

.pc-toast--show {
  opacity: 1;
  transform: translateX(0);
}

.pc-toast--success {
  background: var(--calc-success);
}

.pc-toast--warning {
  background: var(--calc-warning);
}

.pc-toast--error {
  background: var(--calc-danger);
}

.pc-toast--info {
  background: var(--calc-info);
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  .pc-calc-animate,
  .pc-calc-pulse,
  .pc-calc-loading::after {
    animation: none;
  }
  
  .pc-calc-input,
  .pc-calc-submit,
  .pc-calc-chip,
  .pc-calc-action-btn,
  .pc-calc-result-card,
  .pc-calc-related__item {
    transition: none;
  }
}

/* Focus visible styles */
.pc-calc-input:focus-visible,
.pc-calc-submit:focus-visible,
.pc-calc-chip:focus-visible,
.pc-calc-action-btn:focus-visible {
  outline: 2px solid var(--calc-primary);
  outline-offset: 2px;
}