:root {
  color-scheme: light;
  --ink: #17211c;
  --muted: #60706a;
  --line: #d9e2dd;
  --paper: #fbfaf6;
  --surface: #ffffff;
  --teal: #0f7b68;
  --teal-dark: #095446;
  --coral: #de6a54;
  --gold: #d7a72f;
  --blue: #2d6cdf;
  --shadow: 0 18px 48px rgba(22, 34, 29, 0.11);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  align-items: center;
  background: rgba(251, 250, 246, 0.92);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(16px, 3vw, 36px);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.brand {
  align-items: center;
  display: flex;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  align-items: center;
  background: var(--teal);
  color: white;
  display: grid;
  flex: 0 0 auto;
  height: 44px;
  justify-items: center;
  width: 44px;
}

.brand h1,
.brand p {
  margin: 0;
}

.brand h1 {
  font-size: 20px;
  line-height: 1.1;
}

.brand p {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.top-actions {
  display: flex;
  gap: 8px;
}

.icon-button {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  height: 42px;
  justify-items: center;
  width: 42px;
}

.icon-button:hover,
.tab:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.workspace {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
  grid-template-columns: minmax(300px, 390px) minmax(0, 1fr);
  margin: 0 auto;
  max-width: 1380px;
  padding: clamp(16px, 3vw, 36px);
}

.control-panel,
.result-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.control-panel {
  align-self: start;
  display: grid;
  gap: 18px;
  padding: clamp(18px, 2.2vw, 26px);
  position: sticky;
  top: 96px;
}

.panel-heading {
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.eyebrow {
  color: var(--coral);
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.panel-heading h2 {
  font-size: 24px;
  line-height: 1.16;
  margin: 4px 0 0;
}

label,
fieldset {
  border: 0;
  color: var(--ink);
  display: grid;
  font-size: 14px;
  font-weight: 700;
  gap: 8px;
  margin: 0;
  padding: 0;
}

legend {
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 8px;
}

input[type="text"],
select,
textarea {
  background: #f8fbf9;
  border: 1px solid var(--line);
  color: var(--ink);
  min-height: 44px;
  outline: 0;
  padding: 11px 12px;
  width: 100%;
}

textarea {
  min-height: 112px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 123, 104, 0.14);
}

.field-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

.source-switches {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}

.switch-card {
  display: block;
  position: relative;
}

.switch-card input {
  position: absolute;
  opacity: 0;
}

.switch-card span {
  align-items: center;
  background: #f8fbf9;
  border: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  font-weight: 800;
  gap: 9px;
  min-height: 44px;
  padding: 10px 12px;
}

.switch-card input:checked + span {
  background: #ebf7f2;
  border-color: var(--teal);
  color: var(--teal-dark);
}

.segmented {
  background: #eef3f0;
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 44px;
  padding: 4px;
}

.segmented label {
  display: block;
  position: relative;
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  align-items: center;
  color: var(--muted);
  display: flex;
  font-weight: 800;
  height: 100%;
  justify-content: center;
  padding: 8px;
}

.segmented input:checked + span {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 3px 10px rgba(18, 30, 25, 0.08);
}

.primary-button {
  align-items: center;
  background: var(--teal);
  border: 1px solid var(--teal);
  color: white;
  display: flex;
  font-weight: 900;
  gap: 10px;
  justify-content: center;
  min-height: 50px;
  padding: 12px 16px;
  width: 100%;
}

.primary-button:hover {
  background: var(--teal-dark);
}

.primary-button:disabled {
  background: #8ba79f;
  border-color: #8ba79f;
  cursor: wait;
}

.result-panel {
  min-height: calc(100vh - 148px);
  overflow: hidden;
}

.tabs {
  background: #f8fbf9;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 10px;
}

.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  flex: 0 0 auto;
  font-weight: 800;
  min-height: 38px;
  padding: 8px 13px;
}

.tab.active {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.report {
  display: none;
  padding: clamp(18px, 3vw, 34px);
}

.report.active {
  display: block;
}

.report-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.full-span {
  grid-column: 1 / -1;
}

.report-card,
.metric-card {
  border: 1px solid var(--line);
  padding: 18px;
}

.report-card h3,
.metric-card h3 {
  font-size: 17px;
  line-height: 1.2;
  margin: 0 0 10px;
}

.report-card p,
.report-card li,
.metric-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.report-card p {
  margin: 0;
}

.notice-card {
  background: #fff8ed;
}

.compact-section {
  border-top: 1px solid var(--line);
  padding: 12px 0 0;
}

.compact-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.compact-section h4 {
  font-size: 14px;
  margin: 0 0 8px;
}

.report-card ul,
.report-card ol {
  margin: 0;
  padding-left: 19px;
}

.metric-row {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 16px;
}

.metric-card {
  background: #f8fbf9;
}

.metric-card strong {
  color: var(--teal-dark);
  display: block;
  font-size: 24px;
  line-height: 1;
  margin-bottom: 8px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.pill {
  align-items: center;
  background: #eef3f0;
  border: 1px solid var(--line);
  color: var(--ink);
  display: inline-flex;
  font-size: 13px;
  font-weight: 800;
  gap: 6px;
  min-height: 30px;
  padding: 6px 10px;
}

.source-list {
  display: grid;
  gap: 12px;
}

.source-item {
  align-items: start;
  border: 1px solid var(--line);
  display: grid;
  gap: 12px;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  padding: 16px;
}

.source-icon {
  align-items: center;
  color: white;
  display: grid;
  height: 42px;
  justify-items: center;
  width: 42px;
}

.source-icon.meta {
  background: var(--blue);
}

.source-icon.amazon {
  background: var(--gold);
}

.source-icon.tiktok {
  background: var(--coral);
}

.source-item h3,
.source-item p {
  margin: 0;
}

.source-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.source-item p {
  color: var(--muted);
  line-height: 1.45;
}

.source-item a {
  border: 1px solid var(--line);
  color: var(--teal-dark);
  font-weight: 900;
  padding: 9px 12px;
  text-decoration: none;
  white-space: nowrap;
}

.source-item a:hover {
  border-color: var(--teal);
}

.empty-state {
  align-items: center;
  display: grid;
  justify-items: center;
  min-height: calc(100vh - 220px);
  padding: 30px;
  text-align: center;
}

.empty-state h2 {
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.02;
  margin: 18px auto 12px;
  max-width: 760px;
}

.empty-state p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
  margin: 0;
  max-width: 620px;
}

.source-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.source-strip span {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(22, 34, 29, 0.08);
  display: flex;
  font-weight: 900;
  gap: 8px;
  min-height: 42px;
  padding: 9px 13px;
}

.toast {
  background: var(--ink);
  bottom: 18px;
  color: white;
  font-weight: 800;
  left: 50%;
  padding: 11px 16px;
  position: fixed;
  transform: translateX(-50%);
  z-index: 50;
}

@media (max-width: 920px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .result-panel {
    min-height: 620px;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    gap: 12px;
  }

  .brand h1 {
    font-size: 18px;
  }

  .brand p {
    font-size: 12px;
  }

  .field-grid,
  .report-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .source-item {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .source-item a {
    grid-column: 1 / -1;
    text-align: center;
  }
}