:root {
  --bg: #f2f6fb;
  --surface: #ffffff;
  --surface-soft: #f6faff;
  --text: #12263a;
  --muted: #5f7388;
  --line: #d8e3f0;
  --primary: #1479ff;
  --primary-deep: #0d4faa;
  --accent: #08a88a;
  --warning: #e98d28;
  --danger: #dc4f4f;
  --success: #1f9d60;
  --shadow: 0 16px 32px rgba(13, 37, 62, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Plus Jakarta Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.app-gradient {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% 20%, rgba(20, 121, 255, 0.13), transparent 38%),
    radial-gradient(circle at 80% 12%, rgba(8, 168, 138, 0.1), transparent 32%),
    linear-gradient(180deg, #f6f9ff, #f2f6fb);
}

.app-shell {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 26px 18px;
  border-right: 1px solid rgba(216, 227, 240, 0.8);
  background: linear-gradient(180deg, #f9fcff, #f2f8ff);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), #40c2ff);
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.brand h1 {
  margin: 0;
  font-size: 1.05rem;
  font-family: "Space Grotesk", sans-serif;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.tab-nav {
  display: grid;
  gap: 8px;
}

.tab-link {
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: #26405c;
  border-radius: 12px;
  font: inherit;
  font-weight: 600;
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.22s ease;
}

.tab-link:hover {
  background: #edf5ff;
  border-color: #d4e3f5;
  transform: translateX(1px);
}

.tab-link.active {
  background: linear-gradient(135deg, #e7f1ff, #eff8ff);
  border-color: #bfd6f2;
  color: var(--primary-deep);
}

.sidebar-note {
  margin-top: 20px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid #d7e4f4;
  background: var(--surface);
}

.sidebar-note h3 {
  margin: 0;
  font-size: 0.95rem;
}

.sidebar-note p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.workspace {
  padding: 24px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.kicker {
  margin: 0;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
}

.workspace-header h2 {
  margin: 8px 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
}

.header-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 8px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeUp 0.35s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.kpi-card p {
  margin: 0;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.86rem;
}

.kpi-card h3 {
  margin: 10px 0 8px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.4rem, 2vw, 1.8rem);
}

.kpi-card small {
  color: #6c8299;
}

.chart-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.chart-card {
  min-height: 290px;
}

.chart-card.wide {
  grid-column: 1 / -1;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.card-head h3,
.card h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.02rem;
}

.chart-card canvas {
  width: 100% !important;
  height: 225px !important;
}

.split-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-card h3,
.output-card h3 {
  margin-bottom: 16px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: #38516d;
  font-weight: 700;
}

input,
select {
  font: inherit;
  border: 1px solid #c4d5e9;
  border-radius: 10px;
  padding: 9px 10px;
  background: #fff;
}

input[type="range"] {
  accent-color: var(--primary);
  padding: 0;
}

button,
.btn-primary,
.btn-secondary {
  font: inherit;
}

.btn-primary,
.btn-secondary {
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  margin-top: 16px;
  background: linear-gradient(135deg, var(--primary), #1fa8ff);
  color: #fff;
  padding: 11px 16px;
  box-shadow: 0 12px 20px rgba(20, 121, 255, 0.22);
}

.btn-secondary {
  margin-top: 14px;
  border: 1px solid #c3d8f1;
  background: #eef6ff;
  color: var(--primary-deep);
  padding: 10px 14px;
}

.btn-primary:hover,
.btn-secondary:hover {
  transform: translateY(-1px);
}

.output-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-pill {
  font-size: 0.77rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: #edf4ff;
  color: #24558f;
  border: 1px solid #c4d9f0;
}

.primary-result {
  margin: 14px 0 12px;
  border-radius: 14px;
  background: linear-gradient(135deg, #f3f8ff, #f6fbff);
  border: 1px solid #d6e4f5;
  padding: 14px;
}

.primary-result p {
  margin: 0;
  color: var(--muted);
}

.primary-result h4 {
  margin: 8px 0 0;
  font-size: 1.9rem;
  font-family: "Space Grotesk", sans-serif;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.result-grid article {
  border: 1px solid #d8e3f2;
  border-radius: 12px;
  padding: 10px;
  background: #fbfdff;
}

.result-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.result-grid strong {
  display: block;
  margin-top: 7px;
}

.action-box {
  margin-top: 12px;
  border-radius: 12px;
  border: 1px solid #d6e3f3;
  background: #f6fbff;
  padding: 11px;
}

.action-title {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #4e6a87;
}

#recommendedAction {
  margin: 8px 0 0;
  font-weight: 600;
  line-height: 1.45;
}

.insights-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 14px;
}

.segment-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  border: 1px solid #c9dbf0;
  background: #f4f8ff;
  color: #2a4f7f;
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
}

.filter-btn.active {
  background: #dfeeff;
  border-color: #8dbaf3;
}

.search-box {
  min-width: 260px;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: #f4f9ff;
}

th,
td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid #dce7f4;
  font-size: 0.9rem;
}

th {
  color: #3f5f82;
  font-weight: 700;
}

tbody tr:hover {
  background: #f8fbff;
}

.tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
}

.tag.vip {
  background: #e7f7f0;
  color: #178553;
}

.tag.growth {
  background: #e9f1ff;
  color: #1f60c8;
}

.tag.at-risk {
  background: #fff0f0;
  color: #c64040;
}

.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.pipeline-step {
  min-height: 168px;
  background: linear-gradient(155deg, #fcfeff, #f4f9ff);
}

.pipeline-step span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  background: #e5f1ff;
  color: var(--primary-deep);
  font-weight: 800;
  font-size: 0.8rem;
}

.pipeline-step h3 {
  margin-top: 12px;
}

.pipeline-step p {
  color: var(--muted);
  margin-bottom: 0;
  line-height: 1.45;
}

.feature-card {
  margin-top: 14px;
}

.feature-list {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.feature-list div {
  border: 1px solid #d7e4f2;
  border-radius: 12px;
  padding: 12px;
  background: #fafcff;
}

.feature-list h4 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
}

.feature-list p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

#explainNarrative {
  margin: 10px 0 16px;
  color: #2f4864;
  line-height: 1.55;
}

.contribution-grid {
  display: grid;
  gap: 12px;
}

.contribution-row {
  border: 1px solid #d8e6f4;
  border-radius: 12px;
  padding: 12px;
  background: #fbfdff;
}

.contribution-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.bar-track {
  margin-top: 8px;
  height: 10px;
  border-radius: 999px;
  background: #eaf2fd;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, #1f8dff, #24c0dd);
  transition: width 0.55s ease;
}

.simulator-controls {
  display: grid;
  gap: 14px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  color: #537091;
  font-size: 0.82rem;
}

.scenario-output {
  background: linear-gradient(160deg, #0d2238, #0e2f46);
  color: #eff6ff;
  border-color: #1f3e58;
}

.scenario-output h3 {
  color: #f4f9ff;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.scenario-grid div {
  border: 1px solid rgba(207, 230, 255, 0.24);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.scenario-grid p {
  margin: 0;
  color: #a6c4e0;
  font-size: 0.78rem;
}

.scenario-grid h4 {
  margin: 8px 0 0;
  font-size: 1.35rem;
  font-family: "Space Grotesk", sans-serif;
}

.sim-insight {
  margin: 12px 0 0;
  color: #bdd8f4;
  line-height: 1.5;
}

.upload-card p {
  color: var(--muted);
}

.upload-card .hint {
  font-size: 0.83rem;
}

.file-input-wrap {
  display: inline-grid;
  gap: 6px;
}

.upload-status {
  margin: 12px 0;
  font-size: 0.9rem;
  color: #365779;
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 16px;
}

@media (max-width: 1280px) {
  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pipeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid rgba(216, 227, 240, 0.8);
  }

  .workspace {
    padding: 16px;
  }

  .split-layout,
  .chart-grid,
  .result-grid,
  .field-grid,
  .feature-list,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .chart-card.wide {
    grid-column: auto;
  }

  .search-box {
    min-width: 100%;
  }
}

@media (max-width: 640px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .workspace-header {
    flex-direction: column;
    gap: 8px;
  }

  th,
  td {
    font-size: 0.83rem;
  }
}

/* Conversion Insights Module */
.conversion-page-header {
  background: linear-gradient(135deg, #f6fbff, #f0f7ff);
}

.conversion-page-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.conversion-page-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.conversion-kpi-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.conversion-filters-card {
  margin-top: 14px;
}

.conversion-filter-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.conversion-filter-grid select {
  background: #fbfdff;
}

.conversion-chart-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.conversion-chart-grid .wide {
  grid-column: 1 / -1;
}

.ai-insights-panel {
  margin-top: 14px;
}

.ai-insights-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.ai-insights-head h3 {
  margin: 0;
}

.conversion-insights-output {
  margin-top: 14px;
  border: 1px solid #d5e3f3;
  border-radius: 12px;
  background: #f8fbff;
  padding: 12px;
  color: #2f4f71;
}

.conversion-insights-output p {
  margin: 0;
  line-height: 1.5;
}

.conversion-insights-output ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

@media (max-width: 1280px) {
  .conversion-kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .conversion-kpi-grid,
  .conversion-filter-grid,
  .conversion-chart-grid {
    grid-template-columns: 1fr;
  }
}

.model-badge {
  margin: 0 0 10px;
  color: #4a6683;
  font-size: 0.84rem;
  font-weight: 600;
}

.model-meta-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.model-meta-grid div {
  border: 1px solid #d7e4f2;
  border-radius: 12px;
  padding: 12px;
  background: #fafcff;
}

.model-meta-grid h4 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
}

.model-meta-grid p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.dataset-link {
  display: inline-block;
  margin-top: 10px;
  color: #1363d2;
  font-weight: 700;
  text-decoration: none;
}

.dataset-link:hover {
  text-decoration: underline;
}

@media (max-width: 980px) {
  .model-meta-grid {
    grid-template-columns: 1fr;
  }
}