/* ─── Fonts ────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Roboto:wght@400;500;700&family=Roboto+Mono:wght@400;500;700&display=swap');

/* ─── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Background */
  --color-bg:             #0A0A0A;
  --color-surface:        #141414;
  --color-surface-raised: #1A1A1A;

  /* Text */
  --color-text:           #FFFFFF;
  --color-text-muted:     #909090;
  --color-text-disabled:  #555555;

  /* Borders */
  --color-border:         #DADADA26; /* gray/200 at low opacity */
  --color-border-input:   #DADADA;

  /* Category colors */
  --color-benchmark:      #E29BC9; /* Mauve/200 */
  --color-efficiency:     #89E6EF; /* Steel Blue/200 */
  --color-risk:           #FBBBB5; /* Carmine/200 */
  --color-adoption:       #00F2A0; /* Jade/200 */

  /* Accent */
  --color-yellow:         #FFD752;
  --color-jade:           #00F2A0;
  --color-error:          #E9B0AF; /* Carmine2 */
  --color-error-border:   #E9B0AF;

  /* Fonts */
  --font-text:    'Inter', sans-serif;
  --font-mono:    'Roboto Mono', monospace;
  --font-roboto:  'Roboto', sans-serif;

  /* Sizing */
  --radius-input: 100px;
  --radius-card:  8px;
}

html, body {
  font-family: var(--font-text);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  font-size: 16px;
}

/* ─── Layout ───────────────────────────────────────────────────── */
.app-layout {
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: 1fr 380px;
  grid-template-areas:
    "topbar topbar"
    "left   right";
  min-height: 100vh;
}

/* ─── Top Bar ──────────────────────────────────────────────────── */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: flex-start;
  padding: 2.5rem 2.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
}
.topbar-headline h1 {
  font-family: var(--font-roboto);
  font-size: 25pt;
  font-weight: 200;
  line-height: 1.2;
  max-width: 480px;
}
.topbar-headline .get-started {
  margin-top: 1rem;
  font-family: var(--font-roboto);
  font-size: 0.75rem;
  font-weight: 200;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.topbar-headline .get-started-sub {
  font-family: var(--font-roboto);
  font-size: 0.8rem;
  font-weight: 200;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}
.topbar-headline .topbar-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.topbar-right {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}
.topbar-icons {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.topbar-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.topbar-total {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
  text-align: right;
}

/* ─── Right Panel total block ──────────────────────────────────── */
/* ─── Right Panel total block ──────────────────────────────────── */
.right-panel-total-block {
  margin-bottom: 1.5rem;
}
.right-panel-tagline {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}
.right-panel-total-header {
  display: flex;
  align-items: right;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}
.right-panel-total-label {
  font-family: var(--font-mono);
  align-items: end;
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-yellow);
}
.right-panel-icons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  position: relative;
}
.right-panel-icons button {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.15s;
}
.right-panel-icons button:hover { color: var(--color-text); }

/* Download dropdown */
.download-dropdown-wrap { position: relative; }
.download-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  min-width: 140px;
  z-index: 200;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.download-menu.open { display: block; }
.download-menu button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.6rem 1rem;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  text-align: left;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.download-menu button:hover {
  background: rgba(255,255,255,0.05);
  color: var(--color-text);
}

/* ─── Left Column ──────────────────────────────────────────────── */
.left-col {
  grid-area: left;
  padding: 2rem 2.5rem;
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
}

.selection-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* ─── Category Section ─────────────────────────────────────────── */
.category-section { margin-bottom: 0.5rem; }

.category-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.75rem 0 0.5rem;
  border-top: 1px solid var(--color-border);
  margin-bottom: 0.25rem;
}
.category-label.benchmark  { color: var(--color-benchmark); }
.category-label.efficiency { color: var(--color-efficiency); }
.category-label.risk       { color: var(--color-risk); }
.category-label.adoption   { color: var(--color-adoption); }
.category-label.selected-metrics-label { color: var(--color-yellow); }

/* ─── Formula Row ──────────────────────────────────────────────── */
.formula-row {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.formula-row-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

/* Checkbox */
.formula-checkbox {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--color-text-muted);
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, background 0.15s;
  cursor: pointer;
}
.formula-checkbox.checked {
  border-color: var(--color-text);
  background: var(--color-text);
}
.formula-checkbox.checked svg { display: block; }
.formula-checkbox svg { display: none; }

.formula-row-text { flex: 1; }
.formula-row-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}
.formula-row.disabled .formula-row-title,
.formula-row.disabled .formula-row-desc {
  color: var(--color-text-disabled);
}
.formula-row-desc {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}
.disabled-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-disabled);
  margin-bottom: 0.3rem;
}

/* Total impact row inside expanded card */
.formula-total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
}
.formula-total-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.formula-total-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ─── Expanded Card Body ───────────────────────────────────────── */
.formula-body { display: none; margin-top: 1rem; }
.formula-row.open .formula-body { display: block; }

/* Accordion sections */
.accordion-section {
  border-top: 1px solid var(--color-border);
  margin-top: 0.75rem;
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  cursor: pointer;
  user-select: none;
}
.accordion-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.accordion-chevron {
  color: var(--color-text-muted);
  transition: transform 0.2s;
}
.accordion-section.open .accordion-chevron { transform: rotate(180deg); }
.accordion-content { display: none; padding-bottom: 0.75rem; }
.accordion-section.open .accordion-content { display: block; }

/* Formula expression */
.formula-expression-block {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}
.formula-expression {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text);
  line-height: 1.6;
}
.formula-expression-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

/* ─── Inputs Grid ──────────────────────────────────────────────── */
.inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
.input-group { display: flex; flex-direction: column; gap: 0.35rem; }
.input-group label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text);
}
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.input-wrapper input {
  width: 100%;
  padding: 0.55rem 2rem 0.55rem 0.85rem;
  background: transparent;
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s;
  -moz-appearance: textfield;
}
.input-wrapper input::-webkit-outer-spin-button,
.input-wrapper input::-webkit-inner-spin-button { -webkit-appearance: none; }
.input-wrapper input::placeholder { color: var(--color-text-disabled); }
.input-wrapper input:focus { border-color: var(--color-jade); }

/* Input state icons */
.input-icon {
  position: absolute;
  right: 0.65rem;
  width: 18px;
  height: 18px;
  pointer-events: none;
}
.input-icon.default { color: var(--color-text-disabled); }
.input-icon.valid   { color: var(--color-jade); }
.input-icon.error   { color: var(--color-error); }

/* Error state */
.input-wrapper.has-error input {
  border-color: var(--color-error-border);
  color: var(--color-error);
}
.input-wrapper.has-error input::placeholder { color: var(--color-error); }

.input-hint {
  font-size: 0.58rem;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Insight sizing helper link */
.sizing-helper {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 0.75rem;
  cursor: pointer;
  background: none;
  border: none;
}
.sizing-helper:hover { color: var(--color-text); }

/* ─── Calculate Button ─────────────────────────────────────────── */
.btn-calculate {
  background: rgba(142, 142, 142, 0.5);
  border: none;
  border-radius: 100px;
  padding: 0.55rem 1.5rem;
  font-family: var(--font-text);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-calculate:hover { background: rgba(142, 142, 142, 0.7); }

/* ─── Sources List ─────────────────────────────────────────────── */
.sources-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.sources-list li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}
.sources-list li::before {
  content: '•';
  color: var(--color-text-disabled);
  flex-shrink: 0;
}
.sources-list a {
  color: var(--color-text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.sources-list a:hover { color: var(--color-text); }
.sources-list .link-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.6;
}

/* ─── Right Panel ──────────────────────────────────────────────── */
.right-col {
  grid-area: right;
  padding: 2rem 1.75rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.right-panel-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-yellow);
  margin-bottom: 0.35rem;
}

.your-metrics-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: 1.5rem;
  margin-bottom: 0.35rem;
}

.right-panel-empty {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.right-panel-total {
  font-family: var(--font-mono);
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1;
}

/* Selected metric items in right panel */
.metric-result-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.metric-result-name-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.metric-result-bullet {
  font-size: 1.2rem;
  line-height: 1;
  flex-shrink: 0;
}
.metric-result-bullet.benchmark  { color: var(--color-benchmark); }
.metric-result-bullet.efficiency { color: var(--color-efficiency); }
.metric-result-bullet.risk       { color: var(--color-risk); }
.metric-result-bullet.adoption   { color: var(--color-adoption); }

.metric-result-name {
  font-size: 0.85rem;
  font-weight: 600;
}
.metric-result-name.benchmark  { color: var(--color-text); }
.metric-result-name.efficiency { color: var(--color-text); }
.metric-result-name.risk       { color: var(--color-text); }
.metric-result-name.adoption   { color: var(--color-text); }

.metric-result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.metric-result-sublabel {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}
.metric-result-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text);
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}
.metric-result-yr {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  font-weight: 400;
}
.metric-result-placeholder {
  color: var(--color-text-disabled);
}

/* ─── Top action buttons (Quick Start, Ask AI) ─────────────────── */
.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: rgba(142, 142, 142, 0.25);
  color: var(--color-text-muted);
  transition: background 0.15s, color 0.15s;
}
.btn-pill:hover { background: rgba(142, 142, 142, 0.4); color: var(--color-text); }

/* ─── Utility ──────────────────────────────────────────────────── */
.hidden { display: none !important; }

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 4rem 0;
  color: var(--color-text-muted);
  grid-column: 1 / -1;
}
.spinner {
  width: 32px; height: 32px;
  border: 2px solid #333;
  border-top-color: var(--color-jade);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-state {
  color: var(--color-error);
  padding: 2rem;
  grid-column: 1 / -1;
}

/* ─── Export bar ───────────────────────────────────────────────── */
.export-bar {
  margin-top: auto;
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid var(--color-border);
}
.export-bar-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}
.export-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "right"
      "left";
  }
  .right-col {
    position: static;
    height: auto;
    border-bottom: 1px solid var(--color-border);
  }
  .left-col { border-right: none; }
  .topbar { padding: 1.5rem 1.25rem; }
  .left-col { padding: 1.5rem 1.25rem; }
  .right-col { padding: 1.5rem 1.25rem; }
}