:root {
  --bg: #f6f1ea;
  --ink: #1f1a17;
  --muted: #6b625c;
  --accent: #2f6f6d;
  --accent-2: #d98c5f;
  --panel: #ffffff;
  --shadow: rgba(31, 26, 23, 0.08);
  --radius: 14px;
  --panel-height: auto;
  --panel-border: #ece5dd;
  --panel-soft: #fffaf6;
  --tabs-max: 1180px;
  --space-1: 6px;
  --space-2: 10px;
  --space-3: 14px;
  --space-4: 18px;
  --space-5: 24px;
  --text-xs: 0.75rem;
  --text-sm: 0.85rem;
  --text-md: 0.95rem;
  --text-lg: 1.1rem;
  --text-xl: 1.25rem;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fff 0%, #f3eee7 65%);
  overflow-x: hidden;
  overflow-y: scroll;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  background: linear-gradient(135deg, #22323b, #2f6f6d);
  color: #fff;
  padding: 14px 16px;
}

.hero-inner {
  max-width: 1520px;
  margin: 0 auto;
  display: grid;
  gap: 8px;
  width: 100%;
  justify-items: center;
  text-align: center;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: 0 auto;
  gap: 12px;
}

.logo-row {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
}

.logo-row img {
  max-width: 260px;
  height: auto;
}

.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;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  margin-bottom: 10px;
  color: #d7efe8;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 2.5rem;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.hero-tagline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  text-align: center;
}

.hero-tagline p {
  margin: 0;
}

.theme-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #111;
  transition: transform 0.2s ease, background 0.2s ease;
}

body.dark .theme-dot {
  background: #fff;
  transform: scale(1.05);
}

.btn {
  padding: 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  color: #fff;
  background: var(--accent-2);
  font-weight: 600;
  font-size: 0.9rem;
}

.btn.ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.container {
  max-width: 1680px;
  margin: -6px auto 0;
  padding: 0 clamp(16px, 4vw, 42px);
  display: grid;
  gap: var(--space-3);
  flex: 1;
  overflow: visible;
}

.ribbon {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  background: #fff;
  border-radius: 14px;
  padding: var(--space-2);
  box-shadow: 0 14px 30px var(--shadow);
}

.ribbon div {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: #f8f5f1;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
}

.ribbon span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.ribbon strong {
  font-size: var(--text-md);
}

.app-shell {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
  align-items: start;
}

.side-panel {
  position: static;
  align-self: start;
  background: #fff;
  border-radius: 14px;
  padding: var(--space-3);
  box-shadow: 0 18px 40px var(--shadow);
  max-height: none;
  overflow: visible;
  border: 1px solid var(--panel-border);
}

.quick-controls {
  border: none;
  padding: 0;
}

.quick-controls summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: var(--text-lg);
  margin: 0 0 var(--space-2);
}

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

.summary-icon {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.quick-controls[open] .summary-icon {
  transform: rotate(225deg);
}

.quick-controls-body {
  display: grid;
  gap: var(--space-2);
}

.main-panel {
  display: grid;
  gap: var(--space-3);
  height: auto;
  overflow: visible;
  padding-bottom: var(--space-4);
  min-width: 0;
  width: 100%;
}

.tabs-shell {
  width: 100%;
  max-width: var(--tabs-max);
  display: grid;
  gap: var(--space-3);
  justify-items: stretch;
  margin: 0 auto;
}

.controls-row,
.tabs-content {
  width: 100%;
  justify-self: stretch;
}

.tabs-content {
  display: grid;
  gap: var(--space-3);
  width: var(--tabs-width, 100%);
  min-width: var(--tabs-width, 100%);
  max-width: var(--tabs-width, 100%);
  justify-items: stretch;
  height: var(--tabs-height, auto);
}

.main-panel.is-animating .tab-panel.active {
  animation: fadeUp 0.22s ease;
}

.preset-group {
  display: none;
}

.preset-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  align-items: center;
  background: #fff;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  width: 100%;
}

.preset-bar span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-right: 4px;
}

.controls-row {
  display: grid;
  gap: var(--space-2);
  width: 100%;
}

.tab-select {
  display: none;
  gap: var(--space-1);
  background: #fff;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
}

.tab-select label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.tab-select select {
  width: 100%;
  padding: var(--space-1) var(--space-2);
  border-radius: 8px;
  border: 1px solid #d8d0c9;
  background: #fff;
  font-size: var(--text-sm);
}

.preset-btn {
  background: #22323b;
  color: #fff;
  border: none;
  padding: var(--space-1) var(--space-3);
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  font-size: var(--text-sm);
}

.preset-btn.danger {
  background: #8b3a3a;
}

.scenario-actions {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.preset-btn:hover {
  background: #2f6f6d;
}

.tabbar {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-1);
  background: #fff;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  overflow-x: auto;
  width: 100%;
}

.tab-btn {
  border: none;
  background: transparent;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--muted);
  white-space: nowrap;
  font-size: var(--text-sm);
}

.tab-btn.active {
  background: #22323b;
  color: #fff;
}

.tab-panel {
  display: none;
  min-width: 100%;
  width: 100%;
  max-width: var(--tabs-width, 100%);
  min-width: var(--tabs-width, 100%);
  width: var(--tabs-width, 100%);
  justify-self: stretch;
  height: 100%;
  overflow: auto;
  scrollbar-gutter: stable;
}

.tab-panel.active {
  display: grid;
  gap: var(--space-4);
  animation: fadeUp 0.22s ease;
  height: 100%;
  align-content: start;
}

.tab-frame {
  display: grid;
  gap: var(--space-4);
  min-height: clamp(520px, 60vh, 720px);
  width: 100%;
  min-width: 0;
  max-width: 100%;
  justify-self: stretch;
}

.tab-header {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--panel-border);
  align-content: start;
  width: 100%;
}

.tab-body {
  display: grid;
  gap: var(--space-4);
  padding-top: var(--space-3);
  width: 100%;
}

.tab-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  align-items: start;
  align-content: start;
  width: 100%;
}

.tab-primary,
.tab-secondary {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
  width: 100%;
}

.tab-secondary .summary {
  grid-template-columns: 1fr;
}

@media (max-width: 1100px) {
  .tab-grid {
    grid-template-columns: 1fr;
  }
}

.overview-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.overview-main .summary {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.overview-chart .mini-chart {
  height: 100%;
}

.grid-2.compact {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.mini-chart {
  background: var(--panel-soft);
  border-radius: 12px;
  border: 1px solid #efe3d8;
  padding: 12px;
  overflow: hidden;
}

.mini-chart canvas {
  width: 100%;
  height: 220px;
  display: block;
}

.context-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0;
}

.context-strip div {
  background: #f8f5f1;
  border: 1px solid #efe7df;
  border-radius: 12px;
  padding: var(--space-2) var(--space-3);
  display: grid;
  gap: 4px;
  min-width: 150px;
  flex: 1;
}

.context-strip span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.context-strip strong {
  font-size: var(--text-md);
  color: var(--ink);
}

.panel {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px var(--shadow);
  padding: var(--space-4);
  border: 1px solid var(--panel-border);
  width: 100%;
}

.tab-panel h2 {
  margin-top: 0;
  font-size: var(--text-xl);
  margin-bottom: 0;
}

.tab-panel h3 {
  margin: 0 0 8px;
  font-size: var(--text-lg);
}

.tab-panel .note {
  margin: 0;
}

.tab-panel > .context-strip {
  margin-bottom: 0;
}

.grid-2 {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.field label {
  font-weight: 600;
  font-size: var(--text-sm);
}

.field input,
.field select {
  padding: var(--space-2) var(--space-3);
  border-radius: 10px;
  border: 1px solid #d8d0c9;
  font-size: var(--text-md);
  background: #fff;
}

.field.checkbox {
  flex-direction: row;
  align-items: center;
}

.field.checkbox label {
  font-weight: 500;
}

.summary {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  width: 100%;
}

.summary.mini {
  margin-top: var(--space-3);
}

.summary-card {
  background: #f8f5f1;
  border-radius: 12px;
  padding: var(--space-3);
  border: 1px solid var(--panel-border);
}

.summary-card h4 {
  margin: 0 0 6px;
  font-size: var(--text-xs);
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.summary-card p {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
}

.summary-card.highlight {
  border-color: var(--accent-2);
  background: #fff4ec;
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
}

.note.warn {
  color: #b45309;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 10px 12px;
  border-radius: 10px;
}

.breakdown {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 0.95rem;
  table-layout: fixed;
}

.breakdown th,
.breakdown td {
  border-bottom: 1px solid #eee4db;
  padding: 10px 6px;
  text-align: left;
  word-break: break-word;
}

.breakdown th {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.placeholder {
  border: 1px dashed #d8d0c9;
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  color: var(--muted);
  background: #fffdfb;
}

.chart-card {
  background: var(--panel-soft);
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  padding: 12px;
}

.chart-card canvas {
  width: 100%;
  height: clamp(140px, 24vh, 200px);
  display: block;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-weight: 600;
}

.timeline-row span {
  background: #f8f5f1;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.timeline-bar {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, #22323b, #2f6f6d, #d98c5f);
}

.timeline-marker {
  position: absolute;
  top: -6px;
  width: 10px;
  height: 24px;
  border-radius: 999px;
  background: #fff;
  border: 2px solid #1f1a17;
}

.table-wrap {
  max-height: 320px;
  overflow: auto;
  margin-top: 12px;
  border: 1px solid #efe7df;
  border-radius: 12px;
}

.module {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel-soft);
  width: 100%;
}

.module-header {
  display: grid;
  gap: var(--space-1);
  min-height: 32px;
}

.module .context-strip {
  margin: 0;
}

.module-body {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
  width: 100%;
}

.module-body .summary {
  margin: 0;
}

.module-body .breakdown {
  margin-top: 0;
}

.footer {
  text-align: center;
  padding: 24px 16px 40px;
  color: var(--muted);
  display: none;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.9rem;
  }

  .hero-top {
    flex-direction: column;
  }

  .hero-tagline {
    flex-direction: column;
    gap: 8px;
  }

  .theme-toggle {
    align-self: center;
  }

  .side-panel {
    padding: var(--space-2);
  }
}

@media (min-width: 900px) {
  body {
    overflow-x: hidden;
    overflow-y: scroll;
  }

  .container {
    margin: -8px auto 0;
    padding: 0 32px 20px;
    gap: 18px;
  }

  .app-shell {
    grid-template-columns: clamp(260px, 22vw, 320px) minmax(0, 1fr);
    height: 100%;
  }

  .side-panel {
    position: sticky;
    top: 64px;
    max-height: none;
    overflow: visible;
  }

  .main-panel {
    height: auto;
    overflow: visible;
    padding-bottom: 0;
  }

  .tabbar {
    position: static;
    background: #fff;
    box-shadow: none;
    border: 1px solid var(--panel-border);
    padding: 4px 6px;
  }

  .tab-panel.active {
    height: 100%;
    overflow: auto;
  }

  .context-strip {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .context-strip div {
    flex: 0 0 auto;
  }

  .tab-header {
    min-height: 108px;
  }
}

@media (max-width: 900px) {
  .footer {
    display: block;
    padding-bottom: 96px;
  }

  .tab-frame {
    min-height: 0;
  }

  .tabs-content {
    height: auto;
  }

  .tab-panel {
    height: auto;
    overflow: visible;
  }

  .tabbar {
    display: none;
  }

  .tab-select {
    display: grid;
  }

  .main-panel {
    padding-bottom: 24px;
  }
}

body.dark {
  --bg: #141719;
  --ink: #f4f2ef;
  --muted: #b6b0a8;
  --panel: #1b2024;
  --shadow: rgba(0, 0, 0, 0.35);
  --panel-soft: #22282d;
}

body.dark .hero {
  background: linear-gradient(135deg, #1b2a32, #223c3f);
}

body.dark .tabbar,
body.dark .panel,
body.dark .side-panel,
body.dark .ribbon {
  background: #1b2024;
}

body.dark .summary-card,
body.dark .context-strip div,
body.dark .ribbon div,
body.dark .mini-chart,
body.dark .module,
body.dark .chart-card {
  background: #22282d;
  border-color: #2f363c;
}

body.dark .tab-btn.active {
  background: #d98c5f;
  color: #1b2024;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}