/* =====================================================
   NEONATAL HYPERBILIRUBINEMIA CALCULATOR
   Modern Interactive Design System
   Version: 2.0 - Enhanced Edition
   ===================================================== */

/* =====================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ===================================================== */
:root {
  /* Inherit Core Colors from Global Theme */
  /* --primary-* and --neutral-* are inherited from global-theme.css */

  /* Map Local Variables to Global */
  --font-primary: var(--font-sans);

  /* Secondary - Inherit from Global Theme */
  /* --secondary-* variables are now inherited from global-theme.css */

  /* Semantic Colors - Mapped to Global where possible */
  --success-50: var(--app-success-light);
  --success-100: #dcfce7;
  --success-500: var(--app-success);
  --success-600: #16a34a;

  --warning-50: var(--app-warning-light);
  --warning-100: #fef3c7;
  --warning-500: var(--app-warning);
  --warning-600: #d97706;

  --danger-50: var(--app-error-light);
  --danger-100: #fee2e2;
  --danger-500: var(--app-error);
  --danger-600: #dc2626;

  --info-50: var(--app-primary-50);
  --info-500: var(--app-primary);

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
}

/* =====================================================
   ANIMATIONS & KEYFRAMES
   ===================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.8);
    opacity: 1;
  }

  100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-10px);
  }
}

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

  100% {
    background-position: 200% 0;
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

@keyframes spin-slow {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes bounce-gentle {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 0.5;
  }

  100% {
    transform: scale(4);
    opacity: 0;
  }
}

/* =====================================================
   BASE STYLES
   ===================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(79, 70, 229, 0.05) 0px, transparent 50%);
  color: var(--neutral-800);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated Background Pattern */


/* =====================================================
   HEADER - Glassmorphism Style
   ===================================================== */
.header,
.calculator-header {
  background: rgba(255, 255, 255, 0.75);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  padding: var(--space-4) var(--space-6);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  box-shadow:
    0 4px 30px rgba(0, 0, 0, 0.05),
    0 1px 3px rgba(0, 0, 0, 0.03);
  animation: fadeInDown 0.6s var(--ease-out);
}

.header::before,
.calculator-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
      var(--primary-500) 0%,
      var(--secondary-500) 25%,
      var(--warning-500) 50%,
      var(--danger-500) 75%,
      var(--primary-500) 100%);
  background-size: 200% 100%;
  animation: shimmer 8s linear infinite;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calculator-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--primary-900);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  letter-spacing: -0.02em;
  position: relative;
}

.calculator-title span {
  font-size: 1.5em;
  animation: bounce-gentle 2s ease-in-out infinite;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* =====================================================
   MAIN CONTAINER & GRID
   ===================================================== */
.calculator-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  display: grid;
  gap: var(--space-6);
  animation: fadeInUp 0.8s var(--ease-out);
}

@media (min-width: 1024px) {
  .calculator-container {
    grid-template-columns: 420px 1fr;
    align-items: start;
  }
}

/* =====================================================
   CARDS - Glassmorphism with Depth
   ===================================================== */
.calc-card {
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.05),
    0 10px 40px -10px rgba(0, 0, 0, 0.08),
    0 0 0 1px rgba(0, 0, 0, 0.02);
  transition: all var(--duration-300) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.calc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

.calc-card:hover {
  transform: translateY(-4px);
  box-shadow:
    0 20px 40px -10px rgba(0, 0, 0, 0.1),
    0 10px 60px -20px rgba(59, 130, 246, 0.15),
    0 0 0 1px rgba(59, 130, 246, 0.1);
}

.calc-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--neutral-200);
}

.calc-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border-radius: var(--radius-xl);
  font-size: var(--text-xl);
  box-shadow:
    0 4px 6px -1px rgba(37, 99, 235, 0.3),
    0 2px 4px -2px rgba(37, 99, 235, 0.2);
  transition: all var(--duration-300) var(--ease-spring);
}

.calc-card:hover .calc-card-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow:
    0 8px 12px -2px rgba(37, 99, 235, 0.4),
    0 4px 8px -4px rgba(37, 99, 235, 0.3);
}

.calc-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--neutral-900);
  margin: 0;
}

/* Input Card Specific */
.input-card {
  animation: slideInRight 0.6s var(--ease-out) 0.1s both;
}

/* Risk Card Specific */
.risk-card {
  animation: slideInRight 0.6s var(--ease-out) 0.2s both;
  border-left: 4px solid var(--warning-500);
}

.risk-card.has-risk {
  border-left-color: var(--danger-500);
  animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {

  0%,
  100% {
    border-left-color: var(--danger-500);
  }

  50% {
    border-left-color: var(--danger-600);
  }
}

/* Results Card */
.results-card {
  animation: scaleIn 0.6s var(--ease-out) 0.3s both;
  min-height: 500px;
}

/* =====================================================
   FORM ELEMENTS - Modern Interactive Inputs
   ===================================================== */
.form-group {
  margin-bottom: var(--space-5);
  position: relative;
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--space-2);
  transition: color var(--duration-200);
}

.form-group:focus-within .form-label {
  color: var(--primary-600);
}

.form-row {
  display: flex;
  gap: var(--space-3);
  align-items: stretch;
}

.input-wrapper {
  position: relative;
  flex: 1;
}

.form-input,
.form-select {
  width: 100%;
  height: 52px;
  padding: 0 var(--space-4);
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  font-weight: 500;
  color: var(--neutral-900);
  background: white;
  transition: all var(--duration-200) var(--ease-out);
  box-sizing: border-box;
}

.form-input:hover,
.form-select:hover {
  border-color: var(--primary-300);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow:
    0 0 0 4px var(--primary-100),
    0 4px 12px rgba(37, 99, 235, 0.15);
  transform: translateY(-1px);
}

.form-input::placeholder {
  color: var(--neutral-400);
  font-weight: 400;
}

.form-input[type="datetime-local"] {
  padding-right: var(--space-4);
  color-scheme: light;
}

/* Custom Select Styling */
.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space-10);
  appearance: none;
}

.input-suffix {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--neutral-500);
  font-size: var(--text-sm);
  font-weight: 500;
  pointer-events: none;
  background: var(--neutral-100);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
}

.form-input.has-suffix {
  padding-right: var(--space-16);
}

/* Result Value Display */
.result-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary-700);
  background: linear-gradient(135deg, var(--primary-50), var(--secondary-50));
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  border: 2px solid var(--primary-200);
  text-align: center;
  transition: all var(--duration-300);
}

.result-value.calculating {
  animation: shimmer 1.5s infinite;
  background: linear-gradient(90deg, var(--primary-50) 25%, var(--primary-100) 50%, var(--primary-50) 75%);
  background-size: 200% 100%;
}

/* =====================================================
   RISK FACTORS - Interactive Checkboxes
   ===================================================== */
.risk-factors {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--neutral-50);
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.checkbox-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--danger-500), var(--warning-500));
  opacity: 0;
  transition: opacity var(--duration-200);
}

.checkbox-wrapper:hover {
  border-color: var(--primary-300);
  background: var(--primary-50);
  transform: translateX(4px);
}

.checkbox-wrapper:has(.checkbox-input:checked) {
  background: var(--danger-50);
  border-color: var(--danger-300);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.15);
}

.checkbox-wrapper:has(.checkbox-input:checked)::before {
  opacity: 0.05;
}

.checkbox-input {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border: 2px solid var(--neutral-300);
  border-radius: var(--radius-md);
  margin-top: 2px;
  transition: all var(--duration-200);
  position: relative;
  background: white;
  flex-shrink: 0;
  cursor: pointer;
}

.checkbox-input:checked {
  background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
  border-color: var(--danger-500);
  animation: check-bounce 0.3s var(--ease-spring);
}

@keyframes check-bounce {
  0% {
    transform: scale(0.8);
  }

  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}

.checkbox-input:checked::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 12px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  animation: checkmark-draw 0.2s ease-out 0.1s both;
}

@keyframes checkmark-draw {
  from {
    clip-path: inset(0 100% 100% 0);
  }

  to {
    clip-path: inset(0 0 0 0);
  }
}

.checkbox-input:focus {
  box-shadow: 0 0 0 4px var(--danger-100);
  border-color: var(--danger-400);
}

.checkbox-label-text {
  font-size: var(--text-sm);
  color: var(--neutral-700);
  line-height: 1.5;
  font-weight: 500;
  position: relative;
  z-index: 1;
}

.checkbox-wrapper:has(.checkbox-input:checked) .checkbox-label-text {
  color: var(--danger-800);
  font-weight: 600;
}

/* Risk Status Indicator */
.risk-status {
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--success-50);
  border: 2px solid var(--success-200);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--success-700);
  transition: all var(--duration-300);
  margin-top: var(--space-4);
}

.risk-status.has-risk {
  background: var(--danger-50);
  border-color: var(--danger-300);
  color: var(--danger-700);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.2);
  }

  50% {
    box-shadow: 0 0 20px 5px rgba(239, 68, 68, 0.1);
  }
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}

.status-indicator.no-risk {
  background: var(--success-500);
  box-shadow: 0 0 0 4px var(--success-100);
}

.status-indicator.has-risk {
  background: var(--danger-500);
  box-shadow: 0 0 0 4px var(--danger-100);
}

.status-indicator.has-risk::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--danger-500);
  transform: translate(-50%, -50%);
  animation: pulse-ring 1.5s ease-out infinite;
}

/* =====================================================
   BUTTONS - Modern with Ripple Effect
   ===================================================== */
.btn-calc {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  line-height: var(--leading-none);
  border-radius: var(--radius-xl);
  transition: all var(--duration-200) var(--ease-out);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

.btn-calc::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-calc:active::before {
  width: 300px;
  height: 300px;
}

/* Primary Button */
.btn-calc.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow:
    0 4px 6px -1px rgba(37, 99, 235, 0.3),
    0 10px 20px -5px rgba(37, 99, 235, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-calc.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
  transform: translateY(-2px);
  box-shadow:
    0 10px 15px -3px rgba(37, 99, 235, 0.4),
    0 20px 40px -10px rgba(37, 99, 235, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-calc.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 2px 4px -1px rgba(37, 99, 235, 0.3),
    inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Secondary Button */
.btn-calc.btn-secondary {
  background: white;
  color: var(--neutral-700);
  border-color: var(--neutral-200);
  box-shadow: var(--shadow-sm);
}

.btn-calc.btn-secondary:hover {
  background: var(--neutral-50);
  color: var(--primary-600);
  border-color: var(--primary-300);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-calc span {
  position: relative;
  z-index: 1;
}

/* Calculate Button Animation */
#calculateBtn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  animation: fadeInUp 0.6s var(--ease-out) 0.3s both;
}

#calculateBtn.calculating {
  pointer-events: none;
  opacity: 0.8;
}

#calculateBtn.calculating::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: white;
  border-radius: 50%;
  animation: spin-slow 1s linear infinite;
  margin-left: var(--space-2);
}

/* Print Button */
.btn-print {
  background: linear-gradient(135deg, var(--secondary-500), var(--secondary-600));
  color: white;
  box-shadow:
    0 4px 6px -1px rgba(20, 184, 166, 0.3),
    0 10px 20px -5px rgba(20, 184, 166, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: fadeIn 0.4s var(--ease-out);
}

.btn-print:hover {
  background: linear-gradient(135deg, var(--secondary-400), var(--secondary-500));
  transform: translateY(-2px);
  box-shadow:
    0 10px 15px -3px rgba(20, 184, 166, 0.4),
    0 20px 40px -10px rgba(20, 184, 166, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-print:active {
  transform: translateY(0);
  box-shadow:
    0 2px 4px -1px rgba(20, 184, 166, 0.3),
    inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Print Styles */
@media print {

  .calculator-header,
  .left-column,
  .btn-print,
  .tabs,
  footer,
  .info-section {
    display: none !important;
  }

  body {
    background: white !important;
    animation: none !important;
  }

  .calculator-container {
    display: block !important;
    max-width: 100% !important;
    padding: 0 !important;
  }

  .right-column {
    width: 100% !important;
  }

  .results-card {
    display: block !important;
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    break-inside: avoid;
  }

  .tab-content {
    display: block !important;
    animation: none !important;
  }

  .tab-content:not(.active) {
    display: none !important;
  }

  .chart-container {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  canvas {
    max-height: 400px !important;
  }
}

/* =====================================================
   TABS - Modern Pill Style
   ===================================================== */
.tabs {
  display: flex;
  background: var(--neutral-100);
  padding: var(--space-1);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-6);
  gap: var(--space-1);
  position: relative;
}

.tab-btn {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: transparent;
  border-radius: var(--radius-xl);
  color: var(--neutral-600);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.tab-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: var(--radius-xl);
  opacity: 0;
  transform: scale(0.9);
  transition: all var(--duration-200) var(--ease-out);
  z-index: -1;
}

.tab-btn:hover {
  color: var(--neutral-900);
}

.tab-btn.active {
  color: var(--primary-700);
}

.tab-btn.active::before {
  opacity: 1;
  transform: scale(1);
  box-shadow: var(--shadow-sm);
}

.tab-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--primary-300);
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeInUp 0.4s var(--ease-out);
}

.tab-content.active {
  display: block;
}

/* =====================================================
   RESULT CARDS - Dynamic Status Cards
   ===================================================== */
.result-card {
  background: white;
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--duration-300) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--neutral-300);
  transition: all var(--duration-300);
}

.result-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.result-card.phototherapy::before {
  background: linear-gradient(90deg, var(--warning-400), var(--warning-500));
}

.result-card.exchange::before {
  background: linear-gradient(90deg, var(--danger-400), var(--danger-500));
}

.result-card.phototherapy {
  border-color: var(--warning-200);
  background: linear-gradient(180deg, white, var(--warning-50));
}

.result-card.exchange {
  border-color: var(--danger-200);
  background: linear-gradient(180deg, white, var(--danger-50));
}

.result-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--neutral-500);
  margin-bottom: var(--space-2);
}

.result-card.phototherapy .result-label {
  color: var(--warning-600);
}

.result-card.exchange .result-label {
  color: var(--danger-600);
}

.result-card .result-value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-1);
  background: transparent;
  border: none;
  padding: 0;
}

.result-card.phototherapy .result-value {
  color: var(--warning-600);
}

.result-card.exchange .result-value {
  color: var(--danger-600);
}

.threshold-unit {
  font-size: var(--text-sm);
  color: var(--neutral-400);
  font-weight: 500;
}

/* =====================================================
   RECOMMENDATION BOXES - Status Based
   ===================================================== */
.recommendation-box {
  padding: var(--space-5);
  border-radius: var(--radius-2xl);
  border: 2px solid transparent;
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-300);
}

.recommendation-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  background: currentColor;
}

.recommendation-box h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
  position: relative;
}

.recommendation-box p {
  font-size: var(--text-sm);
  line-height: 1.7;
  position: relative;
}

/* Status Variants */
.recommendation-box.safe {
  background: var(--success-50);
  border-color: var(--success-200);
  color: var(--success-800);
}

.recommendation-box.caution {
  background: var(--warning-50);
  border-color: var(--warning-200);
  color: var(--warning-800);
  animation: subtle-pulse 3s ease-in-out infinite;
}

.recommendation-box.warning {
  background: var(--warning-100);
  border-color: var(--warning-300);
  color: var(--warning-900);
  animation: attention-pulse 2s ease-in-out infinite;
}

.recommendation-box.critical {
  background: linear-gradient(135deg, var(--danger-50), #fef2f2);
  border-color: var(--danger-300);
  color: var(--danger-800);
  animation: urgent-pulse 1s ease-in-out infinite;
  box-shadow: var(--shadow-glow-danger);
}

@keyframes subtle-pulse {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.1);
  }

  50% {
    box-shadow: 0 0 20px 5px rgba(245, 158, 11, 0.15);
  }
}

@keyframes attention-pulse {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.2);
    border-color: var(--warning-300);
  }

  50% {
    box-shadow: 0 0 20px 5px rgba(245, 158, 11, 0.2);
    border-color: var(--warning-400);
  }
}

@keyframes urgent-pulse {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.3);
    transform: scale(1);
  }

  50% {
    box-shadow: 0 0 30px 10px rgba(239, 68, 68, 0.2);
    transform: scale(1.005);
  }
}

/* Patient Level Box */
.recommendation-box#nicePatientLevel,
.recommendation-box#aapPatientLevel {
  background: linear-gradient(135deg, var(--primary-50), var(--secondary-50));
  border-color: var(--primary-200);
}

.level-value {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--primary-700);
  line-height: 1;
  margin: var(--space-2) 0;
}

.level-status {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  display: inline-block;
  margin-top: var(--space-2);
}

.level-status.safe {
  background: var(--success-100);
  color: var(--success-700);
}

.level-status.caution {
  background: var(--warning-100);
  color: var(--warning-700);
}

.level-status.warning {
  background: var(--warning-200);
  color: var(--warning-800);
}

.level-status.critical {
  background: var(--danger-100);
  color: var(--danger-700);
  animation: blink 1s ease-in-out infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

/* =====================================================
   CHARTS
   ===================================================== */
.chart-container {
  background: white;
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-5);
  margin-top: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-300);
}

.chart-container:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--neutral-300);
}

/* =====================================================
   COMPARISON TABLE
   ===================================================== */
#comparisonTable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: var(--space-6);
}

#comparisonTable tr {
  transition: background var(--duration-200);
}

#comparisonTable tr:hover {
  background: var(--neutral-50);
}

#comparisonTable td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--neutral-200);
  font-size: var(--text-sm);
}

#comparisonTable td:first-child {
  font-weight: 600;
  color: var(--neutral-700);
}

#comparisonTable td:not(:first-child) {
  color: var(--neutral-600);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* =====================================================
   INFO SECTION
   ===================================================== */
.info-section {
  background: linear-gradient(135deg, var(--info-50), var(--secondary-50));
  border: 2px solid var(--primary-100);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  margin-top: var(--space-8);
}

.info-section p {
  font-size: var(--text-sm);
  color: var(--neutral-700);
  line-height: 1.8;
}

.info-section strong {
  color: var(--primary-800);
  font-weight: 600;
}

/* =====================================================
   FOOTER
   ===================================================== */
footer {
  text-align: center;
  margin-top: var(--space-12);
  padding-bottom: var(--space-8);
  animation: fadeInUp 0.6s var(--ease-out) 0.5s both;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */
@media (max-width: 1024px) {
  .calculator-container {
    grid-template-columns: 1fr;
    max-width: 700px;
  }

  .left-column,
  .right-column {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .calculator-header {
    flex-direction: column;
    text-align: center;
    padding: var(--space-4);
  }

  .calculator-title {
    font-size: var(--text-lg);
    justify-content: center;
  }

  .calculator-container {
    padding: var(--space-4);
  }

  .calc-card {
    padding: var(--space-4);
    border-radius: var(--radius-xl);
  }

  .form-row {
    flex-direction: column;
    gap: var(--space-3);
  }

  .input-wrapper {
    width: 100%;
  }

  .tabs {
    flex-direction: column;
    border-radius: var(--radius-xl);
  }

  .tab-btn {
    border-radius: var(--radius-lg);
  }

  .result-card .result-value {
    font-size: var(--text-2xl);
  }

  .level-value {
    font-size: var(--text-3xl);
  }

  .btn-calc {
    width: 100%;
  }
}

/* =====================================================
   ACCESSIBILITY
   ===================================================== */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Visible Styles */
*:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =====================================================
   UTILITIES
   ===================================================== */
.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.text-center {
  text-align: center;
}

.font-bold {
  font-weight: 700;
}

.text-lg {
  font-size: var(--text-lg);
}

.text-xl {
  font-size: var(--text-xl);
}

.text-neutral-500 {
  color: var(--neutral-500);
}

/* =====================================================
   HEADER INTEGRATION & LOGO STYLING
   ===================================================== */

/* Ensure Header Content uses full width and flex */
.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* Logo Styling */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  margin-right: auto;
  /* Push nav to right if needed, though header-content handles it */
}

.logo i {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-400));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.2));
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--neutral-900);
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.02em;
}

.logo-subtitle {
  font-size: 0.875rem;
  color: var(--neutral-500);
  font-weight: 600;
}

.logo-developer {
  font-size: 0.65rem;
  color: var(--primary-600);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-top: 2px;
  opacity: 0.9;
  text-transform: uppercase;
}

/* Nav Styling (if not already present) */
.nav {
  display: none;
  /* Hidden on mobile by default */
}

@media (min-width: 768px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin-left: auto;
    margin-right: var(--space-6);
  }
}

.nav-link {
  color: var(--neutral-600);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--duration-200);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}

.nav-link:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

.nav-link.active {
  color: var(--primary-700);
  background: var(--primary-50);
}

/* Theme Toggle & Mobile Menu */
.theme-toggle,
.mobile-menu-toggle {
  background: transparent;
  border: none;
  color: var(--neutral-600);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-full);
  transition: all var(--duration-200);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover,
.mobile-menu-toggle:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

.mobile-menu-toggle {
  display: flex;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}