:root {
  --red-600: #F24738;
  --red-700: #C42E22;
  --red-800: #9B2213;
  --red-50: #FDDBD8;
  --red-100: #FDDBD8;
  --navy: #123A6E;
  --navy-light: #2D5A8E;
  --navy-dark: #0F0529;
  --green-600: #50D361;
  --green-50: #C0DF95;
  --green-100: #C0DF95;
  --amber-600: #8C6D0A;
  --amber-50: #F2D95C;
  --amber-100: #F2D95C;
  --blue-50: #D0E0F2;
  --blue-100: #D0E0F2;
  --blue-600: #123A6E;
  --teal: #24AE99;
  --teal-dark: #1A8C7A;
  --gray-50: #F0E8D5;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #0F0529;
  --gray-900: #0F0529;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-optical-sizing: auto;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== NAV ===== */
.nav {
  background: var(--navy-dark);
  color: var(--white);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--white);
  flex-shrink: 0;
}

.nav-brand .maple {
  color: var(--red-600);
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-links a:hover {
  background: rgba(255,255,255,0.1);
  color: var(--white);
}

.nav-links a.active {
  background: rgba(255,255,255,0.15);
  color: var(--white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  margin-left: auto;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.module {
  display: none;
}

.module.active {
  display: block;
}

/* ===== HERO (LANDING) ===== */
.hero {
  text-align: center;
  padding: 3rem 1rem;
}

.hero h1 {
  font-family: "Inknut Antiqua", serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--navy-dark);
  margin-bottom: 0.5rem;
}

.hero h1 .accent {
  color: var(--navy-dark);
}

.hero .subtitle {
  font-size: 1.15rem;
  color: var(--gray-600);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: left;
  cursor: pointer;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
  transform: translateY(-2px);
}

.feature-card .icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.badge-red-prominent {
  background: var(--red-600) !important;
  color: var(--white) !important;
}

.feature-card .icon.teal   { background: var(--teal);       color: var(--white); }
.feature-card .icon.navy   { background: var(--navy);       color: var(--white); }
.feature-card .icon.green  { background: var(--green-600);  color: var(--gray-800); }
.feature-card .icon.mustard { background: var(--amber-50);  color: var(--gray-800); }

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--gray-800);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.5;
}

/* ===== MODULE HEADERS ===== */
.module-header {
  margin-bottom: 1.5rem;
}

.module-header h2 {
  font-family: "Inknut Antiqua", serif;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--navy-dark);
  margin-bottom: 0.25rem;
}

.module-header p {
  color: var(--gray-500);
  font-size: 0.95rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--navy);
}

/* ===== CARDS & PANELS ===== */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card + .card {
  margin-top: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 1rem;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.35rem;
}

.form-group .hint {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 0.25rem;
}

input[type="text"],
input[type="number"],
input[type="file"],
select,
textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(36,174,153,0.35);
}

.search-input-wrap {
  position: relative;
}

.search-input-wrap input {
  padding-left: 2.5rem;
}

.search-input-wrap .search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  text-decoration: none;
}

.btn:active { transform: scale(0.98); }

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

.btn-secondary {
  background: var(--navy);
  color: var(--white);
}
.btn-secondary:hover { background: var(--navy-light); }

.btn-outline {
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}
.btn-outline:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

/* ===== TABLES ===== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

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

th {
  background: var(--gray-50);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--gray-200);
  color: var(--gray-600);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

tr:hover td {
  background: var(--gray-50);
}

tr:last-child td {
  border-bottom: none;
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
}

.badge-red    { background: var(--red-100);   color: var(--red-700); }
.badge-green  { background: var(--green-100); color: var(--green-600); }
.badge-amber  { background: var(--amber-100); color: var(--amber-600); }
.badge-blue   { background: var(--blue-100);  color: var(--blue-600); }
.badge-gray   { background: var(--gray-200);  color: var(--gray-600); }

/* ===== RESULTS LIST ===== */
.result-item {
  padding: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  background: var(--white);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.result-item:hover {
  border-color: var(--navy-light);
  box-shadow: var(--shadow-sm);
}

.result-item .code {
  font-weight: 700;
  font-size: 1rem;
  color: var(--navy);
  font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
}

.result-item .desc {
  color: var(--gray-600);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

.result-item .meta {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.result-item .meta span {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ===== HS BROWSE TREE ===== */
.browse-section {
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  cursor: pointer;
  background: var(--white);
  transition: background 0.15s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.browse-section:hover {
  background: var(--gray-50);
}

.browse-section .section-label {
  font-weight: 600;
  color: var(--navy);
}

.browse-section .section-desc {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.browse-section .arrow {
  color: var(--gray-400);
  transition: transform 0.2s;
}

/* ===== SIMULATOR ===== */
.sim-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.sim-results {
  margin-top: 1.5rem;
}

.sim-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.sim-stat {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.sim-stat .label {
  font-size: 0.8rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.sim-stat .value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
}

.sim-stat .value.red { color: var(--red-600); }
.sim-stat .value.green { color: var(--green-600); }

.sim-stat .sub {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 0.15rem;
}

/* ===== SCENARIO COMPARISON ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.scenario-card {
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  background: var(--white);
}

.scenario-card.current {
  border-color: var(--red-600);
}

.scenario-card.alternative {
  border-color: var(--green-600);
}

.scenario-card .scenario-label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}

.scenario-card.current .scenario-label { color: var(--red-600); }
.scenario-card.alternative .scenario-label { color: var(--green-600); }

.scenario-row {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  font-size: 0.9rem;
}

.scenario-row .scenario-key {
  color: var(--gray-500);
}

.scenario-row .scenario-val {
  font-weight: 600;
  color: var(--gray-800);
}

.scenario-row.total {
  border-top: 2px solid var(--gray-200);
  margin-top: 0.5rem;
  padding-top: 0.75rem;
}

.scenario-row.total .scenario-val {
  font-size: 1.1rem;
}

.savings-banner {
  background: var(--green-50);
  border: 1px solid var(--green-100);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  text-align: center;
  margin-top: 1rem;
}

.savings-banner .amount {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green-600);
}

.savings-banner .text {
  font-size: 0.9rem;
  color: var(--gray-600);
}

/* ===== DUTY RELIEF ===== */
.program-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
  background: var(--white);
}

.program-card h3 {
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 0.35rem;
}

.program-card .short-desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0;
}

.checklist-item input[type="checkbox"] {
  width: auto;
  margin-top: 0.2rem;
  accent-color: var(--navy);
}

.checklist-item .question-text {
  font-size: 0.9rem;
  color: var(--gray-700);
}

.eligibility-result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  display: none;
}

.eligibility-result.eligible {
  display: block;
  background: var(--green-50);
  border: 1px solid var(--green-100);
  color: var(--green-600);
}

.eligibility-result.partial {
  display: block;
  background: var(--amber-50);
  border: 1px solid var(--amber-100);
  color: var(--amber-600);
}

.eligibility-result.ineligible {
  display: block;
  background: var(--red-50);
  border: 1px solid var(--red-100);
  color: var(--red-700);
}

.program-details {
  display: none;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.program-details.open {
  display: block;
}

.program-details h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  margin-top: 1rem;
}

.program-details h4:first-child {
  margin-top: 0;
}

.program-details ul {
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--gray-600);
}

.program-details ul li {
  margin-bottom: 0.35rem;
}

.program-details a {
  color: var(--navy-light);
  text-decoration: none;
}

.program-details a:hover {
  text-decoration: underline;
}

/* ===== CSV UPLOAD ===== */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-zone:hover {
  border-color: var(--navy-light);
  background: var(--blue-50);
}

.upload-zone.drag-over {
  border-color: var(--navy);
  background: var(--blue-100);
}

.upload-zone .upload-icon {
  font-size: 2rem;
  color: var(--gray-400);
  margin-bottom: 0.5rem;
}

.upload-zone .upload-text {
  color: var(--gray-600);
  font-size: 0.9rem;
}

.upload-zone .upload-text strong {
  color: var(--navy-light);
}

.upload-zone input[type="file"] {
  display: none;
}

/* ===== TABS ===== */
.tab-bar {
  display: flex;
  gap: 0.25rem;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 1.5rem;
}

.tab-bar button {
  padding: 0.6rem 1.25rem;
  background: none;
  border: none;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.tab-bar button:hover {
  color: var(--gray-700);
}

.tab-bar button.active {
  color: var(--navy);
  border-bottom-color: var(--navy);
}

/* ===== ALERT ===== */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.alert-info {
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  color: var(--blue-600);
}

.alert-warning {
  background: var(--amber-50);
  border: 1px solid var(--amber-100);
  color: var(--amber-600);
}

.alert-error {
  background: var(--red-50);
  border: 1px solid var(--red-100);
  color: var(--red-700);
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--gray-400);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.empty-state p {
  font-size: 0.95rem;
  max-width: 400px;
  margin: 0 auto;
}

/* ===== DISCLAIMER FOOTER ===== */
.footer {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding: 1.5rem;
  border-top: 1px solid var(--gray-200);
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--gray-400);
  line-height: 1.6;
}

.footer .last-updated {
  font-weight: 600;
  color: var(--gray-500);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-inner {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    padding-bottom: 0.75rem;
  }

  .nav-links.open {
    display: flex;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .sim-grid {
    grid-template-columns: 1fr;
  }

  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 1rem;
  }
}

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

  .nav-brand {
    font-size: 1.1rem;
  }
}

/* ===== LOADING SPINNER ===== */
.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--gray-200);
  border-top-color: var(--navy);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== CHART CONTAINER ===== */
.chart-wrap {
  position: relative;
  max-height: 350px;
  margin-top: 1rem;
}

/* ===== PRINT STYLES ===== */
@media print {
  .nav, .back-link, .btn, .upload-zone, .tab-bar { display: none !important; }
  .module { display: block !important; }
  body { background: white; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}