:root {
  --bg: #020617;
  --bg-elevated: #020617;
  --bg-card: #020617;
  --border-subtle: #1f2937;
  --border-strong: #4b5563;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.16);
  --accent-strong: #0ea5e9;
  --accent-warm: #fb923c;
  --accent-warm-soft: rgba(251, 146, 60, 0.2);
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.6);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", sans-serif;
}

/* Theme modes */
body.dark {
  --bg: #020617;
  --bg-elevated: #020617;
  --bg-card: #020617;
  --border-subtle: #1f2937;
  --border-strong: #4b5563;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.6);
}

body.light {
  --bg: #eef2f7;
  --bg-elevated: #f3f4f6;
  --bg-card: #ffffff;
  --border-subtle: #d1d5db;
  --border-strong: #9ca3af;
  --text-main: #111827;
  --text-muted: #6b7280;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top left, var(--bg) 0, var(--bg) 55%);
  color: var(--text-main);
}

body {
  min-height: 100vh;
}

.app-shell {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 26px 24px 40px;
}

/* Header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.app-title {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-title h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0.05em;
}

.app-title span {
  font-size: 13px;
  color: var(--text-muted);
}

.app-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* Buttons */

.btn {
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
  color: var(--text-main);
  padding: 7px 14px;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  border-color: var(--accent);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-elevated));
}

.btn span.chip {
  border-radius: 999px;
  border: 1px solid var(--accent-soft);
  padding: 3px 7px;
  font-size: 11px;
  color: var(--accent-strong);
}

.start-convo-btn {
  margin-top: 16px;
}

/* Top nav */

.top-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.top-nav-item {
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
}

.top-nav-item.active {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-elevated));
}

/* Layout */

.main-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.1fr);
  gap: 20px;
}

@media (max-width: 960px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .main-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Cards */

.card {
  background: radial-gradient(circle at top left, var(--bg-card) 0, var(--bg-card) 70%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 16px 18px 18px;
  box-shadow: var(--shadow-soft);
}

.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 12px;
}

.card-title-row h2 {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.card-subtitle {
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Segmentation header */

.segment-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 10px;
}

.segment-header-main {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.segment-header-main h2 {
  margin: 0;
  font-size: 16px;
}

.segment-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* Segment toggle */

.segment-toggle {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
  gap: 4px;
}

.segment-toggle button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
}

.segment-toggle button.active {
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-elevated));
  color: var(--accent-strong);
  border: 1px solid rgba(56, 189, 248, 0.5);
}

/* Bubble canvas */

.bubble-canvas {
  position: relative;
  margin-top: 10px;
  padding: 16px 10px 6px;
  min-height: 260px;
  border-radius: 16px;
  border: 1px solid rgba(31, 41, 55, 0.9);
  background: radial-gradient(circle at top, var(--bg-elevated) 0, var(--bg-elevated) 60%);
  overflow: hidden;
}

.segment-bubble {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: radial-gradient(circle at top left, var(--bg-card), var(--bg-card));
  color: var(--text-main);
  font-size: 13px;
  padding: 12px 18px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
  transform-origin: center center;
}

.segment-bubble-label {
  pointer-events: none;
}

.segment-bubble-count {
  position: absolute;
  top: 8px;
  right: 10px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid rgba(56, 189, 248, 0.4);
  background: rgba(8, 47, 73, 0.7);
  color: var(--accent-strong);
}

.segment-bubble.main-bubble {
  border-color: var(--accent-strong);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-card));
}

/* AI summary */

.ai-summary {
  padding: 10px 12px 10px;
  border-radius: 14px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
  font-size: 12px;
  line-height: 1.55;
}

.ai-summary strong {
  color: var(--accent-strong);
}

/* Table */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 4px;
}

.table th,
.table td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
  text-align: left;
}

.table th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.table tr:hover td {
  background: rgba(15, 23, 42, 0.85);
}

.body.light .table tr:hover td {
  background: rgba(243, 244, 246, 1);
}

.table a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

/* Tag */

.tag {
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  font-size: 11px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  color: var(--text-muted);
}

/* Detail lists */

.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
  gap: 16px;
}

@media (max-width: 960px) {
  .detail-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13px;
}

.detail-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0;
  border-bottom: 1px solid rgba(31, 41, 55, 0.7);
}

.detail-label {
  color: var(--text-muted);
}

.detail-value {
  font-weight: 500;
}

/* Chart */

.chart {
  position: relative;
  width: 100%;
  height: 160px;
  border-radius: 14px;
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
  border: 1px solid rgba(31, 41, 55, 0.95);
  overflow: hidden;
}

.chart::before,
.chart::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.6;
}

.chart::before {
  background-image: linear-gradient(
      to right,
      rgba(55, 65, 81, 0.4) 1px,
      transparent 1px
    );
  background-size: 44px 100%;
}

.chart::after {
  background-image: linear-gradient(
      to top,
      rgba(55, 65, 81, 0.35) 1px,
      transparent 1px
    );
  background-size: 100% 32px;
}

.chart-line {
  position: absolute;
  inset: 16px 10px 12px;
}

.chart-line svg {
  width: 100%;
  height: 100%;
}

/* Breadcrumbs */

.breadcrumbs {
  display: flex;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.breadcrumbs a {
  color: var(--accent);
  text-decoration: none;
}

/* Home hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
}

.hero-title {
  font-size: 36px;
  margin: 0 0 8px;
}

.hero-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.hero-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

/* Chat page */

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

.chat-header {
  margin-bottom: 16px;
}

.chat-header h1 {
  margin: 0;
  font-size: 22px;
}

.chat-header span {
  font-size: 13px;
  color: var(--text-muted);
}

.chat-window {
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: radial-gradient(circle at top left, var(--bg-card) 0, var(--bg-card) 70%);
  box-shadow: var(--shadow-soft);
  height: calc(100vh - 160px);
}

.chat-prominent {
  border: 2px solid var(--accent);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-card));
  box-shadow: 0 20px 50px rgba(56, 189, 248, 0.3);
}

.chat-prominent .card-title-row h2 {
  color: var(--accent-strong);
}

.chat-messages {
  flex: 1;
  padding: 16px 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-message {
  max-width: 70%;
  padding: 8px 12px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
}

.chat-message.bot {
  align-self: flex-start;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: #ffffff;
}

body.light .chat-message.bot {
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
}

.chat-message.user {
  align-self: flex-end;
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-elevated));
  border: 1px solid rgba(56, 189, 248, 0.6);
}

.chat-input-row {
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  padding: 10px 12px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.chat-input-row input[type="text"] {
  flex: 1;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text-main);
}

.chat-input-row input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.chat-input-row button {
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-elevated));
  color: var(--accent-strong);
  padding: 7px 16px;
  font-size: 13px;
  cursor: pointer;
}

/* Optimizer */

.optimizer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
}

@media (max-width: 960px) {
  .optimizer-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.optimizer-canvas {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 4px auto 16px;
}

.optimizer-circle-optimal,
.optimizer-circle-actual {
  position: absolute;
  border-radius: 999px;
}

.optimizer-circle-optimal {
  width: 200px;
  height: 200px;
  border: 2px dashed var(--accent-warm);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), transparent);
}

.optimizer-circle-actual {
  width: 200px;
  height: 200px;
  border: 2px solid var(--accent-strong);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at top left, var(--accent-soft), transparent);
  transition: transform 0.7s ease-out;
}

.optimizer-metric-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.optimizer-legend {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
  justify-content: center;
  margin-top: 4px;
}

.optimizer-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.legend-swatch.actual {
  background: var(--accent-strong);
}

.legend-swatch.optimal {
  border: 2px dashed var(--accent-warm);
}

/* Mini bubbles for optimizer segments */

.optimizer-mini-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13px;
}

.optimizer-mini-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
  cursor: pointer;
}

.optimizer-mini-labels {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.optimizer-mini-title {
  font-weight: 500;
}

.optimizer-mini-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.optimizer-mini-bubbles {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mini-bubble {
  width: 18px;
  height: 18px;
  border-radius: 999px;
}

.mini-bubble.actual {
  background: var(--accent-strong);
}

.mini-bubble.optimal {
  border: 2px dashed var(--accent-warm);
}

/* Market Meter */

.market-meter {
  position: relative;
  width: 100%;
  height: 220px;
  border-radius: 14px;
  background: radial-gradient(circle at top left, var(--bg-elevated), var(--bg-elevated));
  border: 1px solid rgba(31, 41, 55, 0.95);
  overflow: hidden;
  margin-top: 12px;
}

.market-meter::before,
.market-meter::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
}

.market-meter::before {
  background-image: linear-gradient(
      to right,
      rgba(55, 65, 81, 0.3) 1px,
      transparent 1px
    );
  background-size: 12px 100%;
}

.market-meter::after {
  background-image: linear-gradient(
      to top,
      rgba(55, 65, 81, 0.3) 1px,
      transparent 1px
    );
  background-size: 100% 15px;
}

.market-meter-svg {
  position: absolute;
  inset: 20px 40px 30px 20px;
  width: calc(100% - 60px);
  height: calc(100% - 50px);
}

.market-meter-line {
  fill: none;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.market-meter-line.market {
  stroke: var(--accent-warm);
  stroke-dasharray: none;
}

.market-meter-line.dealer {
  stroke: var(--accent-strong);
  stroke-dasharray: 4, 4;
}

.market-meter-legend {
  display: flex;
  gap: 16px;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 8px;
  justify-content: center;
}

.market-meter-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.market-meter-legend-line {
  width: 20px;
  height: 2px;
}

.market-meter-legend-line.market {
  background: var(--accent-warm);
}

.market-meter-legend-line.dealer {
  border-top: 2px dashed var(--accent-strong);
  background: transparent;
  height: 0;
}

.market-meter-axis-label,
.market-meter-axis-text {
  fill: var(--text-muted);
}

.market-meter-axis-line {
  stroke: var(--text-muted);
  stroke-width: 0.5;
  opacity: 0.5;
}

/* Simple utility */

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