/* ==========================================================================
   NCAR Brand Style Guide Implementation
   Economic Value Explorer
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (NCAR Brand Colors) — inherited from shared system
   -------------------------------------------------------------------------- */
:root {
  /* Primary Colors */
  --ncar-blue: #0057C2;
  --dark-blue: #00357A;

  /* Secondary Colors */
  --space: #011837;
  --light-blue: #42C0FF;
  --light-gray: #F1F0EE;
  --white: #FFFFFF;

  /* Accent Colors */
  --accent-orange: #FAA119;
  --accent-yellow: #FFDD31;

  /* Typography */
  --font-family: 'Poppins', Helvetica, Arial, sans-serif;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  /* Content width */
  --content-max-width: 1000px;
  --plot-max-width: 1200px;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--white);
  color: var(--dark-blue);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.app-header {
  background: var(--ncar-blue);
  color: var(--white);
  padding: 30px 2rem;
  position: relative;
  margin-bottom: 50px;
}

.app-header::after {
  content: '';
  position: absolute;
  bottom: -50px;
  left: 0;
  right: 0;
  height: 50px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100' preserveAspectRatio='none'%3E%3Cpath d='M0,0 L0,70 Q360,100 720,30 Q1080,-20 1440,70 L1440,0 Z' fill='%230057C2'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  pointer-events: none;
}

.header-inner {
  max-width: var(--plot-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-logo {
  height: 60px;
  width: auto;
}

.title-link {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.title-link:hover {
  opacity: 0.85;
}

.header-inner h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-orange);
  line-height: 1.2;
}

.header-inner .subtitle {
  font-size: 0.85rem;
  color: var(--light-gray);
  margin-top: 2px;
}

.btn-print {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-left: auto;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 6px;
  color: var(--white);
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.btn-print:hover {
  background: rgba(255,255,255,0.25);
}

.btn-print svg {
  width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
  max-width: var(--plot-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl) var(--spacing-3xl);
}

/* --------------------------------------------------------------------------
   Use-Case Preset Cards
   -------------------------------------------------------------------------- */
.usecase-section {
  margin-bottom: var(--spacing-2xl);
}

.usecase-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-sm);
}

.usecase-section > p {
  color: #5a6a7a;
  margin-bottom: var(--spacing-lg);
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.usecase-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--white);
  border-radius: 12px;
  border: 2px solid var(--light-gray);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.usecase-card:hover {
  border-color: var(--ncar-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 53, 122, 0.12);
}

.usecase-card.active {
  border-color: var(--ncar-blue);
  background: rgba(0, 87, 194, 0.04);
  box-shadow: 0 0 0 3px rgba(0, 87, 194, 0.15);
}

.usecase-card:focus-visible {
  outline: 3px solid var(--light-blue);
  outline-offset: 2px;
}

.usecase-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-sm);
  color: var(--ncar-blue);
}

.usecase-card.active .usecase-icon {
  color: var(--dark-blue);
}

.usecase-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-xs);
}

.usecase-card p {
  font-size: 0.8rem;
  color: #5a6a7a;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   Preset Description Bar
   -------------------------------------------------------------------------- */
.preset-description {
  background: linear-gradient(135deg, rgba(0, 87, 194, 0.05) 0%, rgba(66, 192, 255, 0.05) 100%);
  border-left: 4px solid var(--ncar-blue);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0 8px 8px 0;
  margin-bottom: var(--spacing-2xl);
  font-size: 0.9rem;
  color: var(--dark-blue);
}

/* --------------------------------------------------------------------------
   Value Summary Cards
   -------------------------------------------------------------------------- */
.summary-section {
  margin-bottom: var(--spacing-2xl);
}

.summary-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-lg);
}

.value-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.value-card {
  background: var(--light-gray);
  border-radius: 10px;
  padding: var(--spacing-lg);
  border-left: 4px solid var(--ncar-blue);
  text-align: center;
  position: relative;
}

.value-card-rank {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 700;
  color: #666;
  background: var(--white);
  padding: 2px 8px;
  border-radius: 10px;
}

.value-card-amount {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.value-card-sublabel {
  display: block;
  font-size: 0.7rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: var(--spacing-sm);
}

.value-card-name {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark-blue);
}

.value-card-type {
  display: block;
  font-size: 0.75rem;
  color: #5a6a7a;
}

/* --------------------------------------------------------------------------
   Story Sections (Chart Panels)
   -------------------------------------------------------------------------- */
.story-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  position: relative;
}

.story-section::after {
  content: '';
  display: block;
  width: 120%;
  height: 100px;
  margin-top: 20px;
  margin-left: -10%;
  background: url("../../assets/wave-lines-separator.svg") no-repeat left center;
}

.story-section:last-child::after {
  display: none;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.section-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--ncar-blue);
  line-height: 1;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.section-text {
  max-width: var(--content-max-width);
  margin-bottom: var(--spacing-xl);
}

.section-text p {
  margin-bottom: var(--spacing-md);
  color: var(--dark-blue);
}

.plot-wrapper {
  background: var(--light-gray);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.plot-container {
  width: 100%;
  min-height: 450px;
  background: var(--white);
  border-radius: 8px;
}

/* --------------------------------------------------------------------------
   Customize Parameters Panel
   -------------------------------------------------------------------------- */
.customize-details {
  margin-bottom: var(--spacing-2xl);
  border: 2px solid var(--light-gray);
  border-radius: 12px;
  overflow: hidden;
}

.customize-details summary {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--light-gray);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--dark-blue);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.customize-details summary::-webkit-details-marker { display: none; }

.customize-details summary::before {
  content: '\25B6';
  font-size: 0.7rem;
  transition: transform var(--transition-fast);
}

.customize-details[open] summary::before {
  transform: rotate(90deg);
}

.customize-body {
  padding: var(--spacing-lg) var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.param-group h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--light-gray);
}

.cost-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.cost-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #5a6a7a;
  margin-bottom: var(--spacing-xs);
}

.cost-field input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--light-gray);
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: 0.9rem;
  color: var(--dark-blue);
  transition: border-color var(--transition-fast);
}

.cost-field input:focus {
  border-color: var(--ncar-blue);
  outline: none;
}

.weight-slider {
  margin-bottom: var(--spacing-md);
}

.weight-slider label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: #5a6a7a;
  margin-bottom: var(--spacing-xs);
}

.weight-slider input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--light-gray);
  outline: none;
}

.weight-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ncar-blue);
  cursor: pointer;
  border: 2px solid var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.weight-slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ncar-blue);
  cursor: pointer;
  border: 2px solid var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.probability-slider {
  margin-top: var(--spacing-md);
}

.probability-slider label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: #5a6a7a;
  margin-bottom: var(--spacing-xs);
}

.lt-range-group {
  margin-top: var(--spacing-md);
}

.lt-range-group label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: #5a6a7a;
  margin-bottom: var(--spacing-xs);
}

.lt-range-inputs {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.lt-range-inputs input {
  width: 80px;
  padding: var(--spacing-sm);
  border: 2px solid var(--light-gray);
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: 0.9rem;
  text-align: center;
  color: var(--dark-blue);
}

.lt-range-inputs input:focus {
  border-color: var(--ncar-blue);
  outline: none;
}

.lt-range-inputs span {
  font-weight: 600;
  color: #5a6a7a;
}

/* --------------------------------------------------------------------------
   Break-Even Table
   -------------------------------------------------------------------------- */
.table-scroll-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.breakeven-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.breakeven-table thead {
  background: var(--light-gray);
}

.breakeven-table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 600;
  color: var(--dark-blue);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.breakeven-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--light-gray);
}

.breakeven-table tr:hover {
  background: rgba(0, 87, 194, 0.03);
}

.model-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

.rank-cell {
  font-weight: 700;
  color: #666;
}

.value-cell {
  font-weight: 700;
  color: var(--dark-blue);
}

.type-cell {
  color: #5a6a7a;
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Methodology Section
   -------------------------------------------------------------------------- */
.methodology-section {
  background: var(--light-gray);
  border-radius: 12px;
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.methodology-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-lg);
}

.methodology-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark-blue);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.methodology-section h3:first-of-type {
  margin-top: 0;
}

.methodology-section p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.methodology-section ul {
  list-style: none;
  padding-left: 0;
}

.methodology-section li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-lg);
  position: relative;
}

.methodology-section li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--ncar-blue);
  border-radius: 50%;
}

.caveat-box {
  background: rgba(250, 161, 25, 0.08);
  border-left: 4px solid var(--accent-orange);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0 8px 8px 0;
  margin-top: var(--spacing-lg);
}

.caveat-box strong {
  color: var(--accent-orange);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--space);
  color: var(--white);
  margin-top: 100px;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 0;
  right: 0;
  height: 100px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100' preserveAspectRatio='none'%3E%3Cpath d='M0,100 L0,60 Q360,100 720,40 Q1080,-20 1440,60 L1440,100 Z' fill='%23011837'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.footer-content {
  max-width: var(--plot-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-2xl);
}

.footer-brand {
  order: 2;
}

.footer-logo {
  height: 60px;
}

.footer-text {
  order: 1;
  flex: 1;
}

.footer-text p {
  margin-bottom: var(--spacing-xs);
  opacity: 0.9;
}

/* --------------------------------------------------------------------------
   Loading & Toast (shared pattern)
   -------------------------------------------------------------------------- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  font-size: 1rem;
  color: var(--ncar-blue);
  font-weight: 500;
}

.loading::after {
  content: '';
  width: 24px;
  height: 24px;
  margin-left: var(--spacing-sm);
  border: 3px solid var(--light-gray);
  border-top-color: var(--ncar-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#toast-container {
  position: fixed;
  top: 20px;
  right: var(--spacing-lg);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--space);
  color: var(--white);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation: slideIn 0.3s ease-out;
  transition: opacity 0.3s, transform 0.3s;
}

.toast.error { background: #c62828; }
.toast.success { background: #2e7d32; }

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

.no-data {
  text-align: center;
  color: #666;
  padding: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .btn-print {
    margin-left: 0;
  }

  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .customize-body {
    grid-template-columns: 1fr;
  }

  .value-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-header {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .section-number {
    font-size: 1.5rem;
  }

  .section-header h2 {
    font-size: 1.3rem;
  }

  .main-content {
    padding: 0 var(--spacing-md) var(--spacing-xl);
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-brand {
    order: 1;
  }

  .footer-text {
    order: 2;
  }

  .breakeven-table {
    font-size: 0.8rem;
  }

  .breakeven-table th,
  .breakeven-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .usecase-grid {
    grid-template-columns: 1fr;
  }

  .value-cards-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .value-cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .usecase-card,
  .value-card,
  .btn-print {
    transition: none !important;
  }

  .toast {
    animation: none !important;
  }

  .usecase-card:hover {
    transform: none !important;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  body {
    background: white;
    font-size: 11pt;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .app-header {
    padding: 1cm;
  }

  .app-header::after {
    display: none;
  }

  .btn-print {
    display: none;
  }

  .usecase-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .customize-details {
    display: none;
  }

  .story-section {
    page-break-inside: avoid;
  }

  .plot-wrapper {
    page-break-inside: avoid;
    background: none;
    padding: 0;
  }

  .plot-container {
    min-height: 300px;
    border: 1px solid #ddd;
  }

  .footer {
    page-break-before: always;
    background: var(--light-gray);
    color: var(--dark-blue);
  }

  .footer::before {
    display: none;
  }

  #toast-container {
    display: none;
  }
}