:root {
  /* Warm fintech palette: stone ground, warm-bordered white cards, deep ink
     headings. Chroma is reserved almost entirely for runway-health signalling
     -- the UI chrome itself stays warm-neutral. */
  --primary: #1c1917;          /* stone-900, deep ink -- primary action */
  --primary-hover: #292524;    /* stone-800 */
  --primary-light: #f5f5f4;    /* stone-100, subtle tint */

  --accent: #047857;           /* emerald-700, brand accent + links */
  --accent-soft: #ecfdf5;      /* emerald-50 */

  --success: #047857;          /* emerald-700 */
  --success-bg: #ecfdf5;       /* emerald-50 */
  --success-line: #10b981;     /* emerald-500, chart stroke */

  --strong: #065f46;           /* emerald-800, the deepest/best tier */
  --strong-bg: #d1fae5;        /* emerald-100 */
  --strong-line: #047857;      /* emerald-700, a visible step deeper */

  --warning: #b45309;          /* amber-700 */
  --warning-bg: #fffbeb;       /* amber-50 */
  --warning-line: #f59e0b;     /* amber-500 */

  --danger: #b91c1c;           /* red-700, warm crimson */
  --danger-bg: #fef2f2;        /* red-50 */
  --danger-line: #dc2626;      /* red-600, chart stroke */

  --neutral: #78716c;          /* stone-500 */
  --neutral-bg: #f5f5f4;       /* stone-100 */

  --bg: #f7f6f2;               /* warm stone ground */
  --bg-deep: #efede8;          /* deeper warm stone, inset panels */
  --card-bg: #ffffff;
  --text: #1c1917;             /* stone-900 deep ink headings */
  --text-body: #44403c;        /* stone-700 body */
  --text-muted: #78716c;       /* stone-500 */
  --border: #e7e5e4;           /* stone-200 */
  --border-strong: #d6d3d1;    /* stone-300 */

  --shadow-sm: 0 1px 2px 0 rgba(28, 25, 23, 0.04), 0 1px 3px 0 rgba(28, 25, 23, 0.06);
  --shadow-md: 0 2px 4px -1px rgba(28, 25, 23, 0.05), 0 4px 12px -2px rgba(28, 25, 23, 0.08);

  --radius: 14px;
  --radius-sm: 8px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================ Header ============================ */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.logo-text strong {
  color: var(--accent);
}

.header-nav {
  display: flex;
  gap: 22px;
}

.header-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

.header-nav a:hover {
  color: var(--accent);
}

/* Mobile nav toggle -- built in from day 1, never a retrofit. */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }

  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 4px 20px 12px;
  }

  .header-nav.is-open { display: flex; }

  .header-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }

  .header-nav a:last-child { border-bottom: none; }
}

/* ==================== Compact page intro ==================== */
.page-intro {
  padding: 14px 0 14px;
}

.page-intro h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-intro-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==================== Calculator dashboard grid ==================== */
.calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 20px;
  align-items: start;
  margin-bottom: 48px;
}

@media (max-width: 900px) {
  .calculator-grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.card-header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ==================== Presets ==================== */
.preset-row {
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 18px;
}

.preset-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.btn-preset {
  background: var(--card-bg);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-preset:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* ==================== Form ==================== */
.form-group { margin-bottom: 14px; }

label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-body);
}

.label-optional {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-deep);
  border-radius: 999px;
  padding: 1px 7px;
  margin-left: 6px;
}

.tooltip {
  color: var(--neutral);
  cursor: help;
  font-size: 0.82rem;
}

.input-prefix-wrapper,
.input-suffix-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.input-prefix {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  z-index: 2;
}

.input-suffix {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  z-index: 2;
}

input[type="number"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-family: inherit;
  background-color: var(--card-bg);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

/* Prefix/suffix clearance -- verified geometrically in test_saas_visual.py,
   never just eyeballed (this exact class of bug shipped on the DSCR site once). */
.input-prefix-wrapper input { padding-left: 32px; }
.input-suffix-wrapper input { padding-right: 32px; }

input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(4, 120, 87, 0.14);
}

.field-hint {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  padding: 11px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  flex: 2;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover { background-color: var(--primary-hover); }

.btn-secondary {
  background-color: var(--card-bg);
  color: var(--text-body);
  border: 1px solid var(--border-strong);
  flex: 1;
}

.btn-secondary:hover { background-color: var(--bg-deep); }

/* ==================== Results card ==================== */
.results-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.68rem;
  font-weight: 700;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.badge-neutral { background-color: var(--neutral-bg); color: var(--neutral); }
.badge-success { background-color: var(--success-bg); color: var(--success); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }
.badge-danger  { background-color: var(--danger-bg);  color: var(--danger); }
.badge-strong  { background-color: var(--strong-bg); color: var(--strong); }

/* ---- Large results banner ---- */
.results-banner {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.results-banner.status-success { background: var(--success-bg); border-color: rgba(4, 120, 87, 0.24); }
.results-banner.status-warning { background: var(--warning-bg); border-color: rgba(180, 83, 9, 0.24); }
.results-banner.status-danger  { background: var(--danger-bg);  border-color: rgba(185, 28, 28, 0.22); }
.results-banner.status-strong  { background: var(--strong-bg);  border-color: rgba(6, 95, 70, 0.24); }

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

.results-banner-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 700;
  color: var(--text-muted);
}

.results-banner-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Default alive/dead pill -- outlined rather than filled so it reads as a
   distinct classification next to the filled health badge, not a second
   competing status of the same kind. */
#defaultStatePill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border-strong);
  color: var(--text-body);
  cursor: help;
}

#defaultStatePill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neutral);
  flex-shrink: 0;
}

#defaultStatePill.is-alive::before { background: var(--success-line); }
#defaultStatePill.is-dead::before  { background: var(--danger-line); }

.results-banner-value {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin: 6px 0 2px;
}

.results-banner-status {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.results-banner-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(28, 25, 23, 0.09);
}

.banner-stat { display: flex; flex-direction: column; min-width: 0; }

.banner-stat-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
}

.banner-stat-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}

/* ---- Trajectory chart ---- */
.chart-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 6px;
  background: var(--card-bg);
}

.chart-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.chart-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.chart-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.trajectory-chart {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 460 / 165;   /* matches the viewBox, so scaling stays uniform */
  min-height: 130px;
  overflow: visible;
}

/* ---- Secondary stats ---- */
.secondary-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

@media (max-width: 420px) {
  .secondary-stats { grid-template-columns: 1fr; }
}

.secondary-stat {
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.secondary-stat-label {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
}

.secondary-stat-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
  overflow-wrap: anywhere;
}

/* ---- Health meter ---- */
.benchmark-meter { padding: 2px 2px 0; }

.meter-bar-track {
  position: relative;
  height: 8px;
  border-radius: 999px;
  display: flex;
  overflow: visible;
  margin-bottom: 7px;
}

.meter-segment { height: 100%; }

.seg-danger {
  width: 25%;
  background-color: var(--danger-line);
  border-top-left-radius: 999px;
  border-bottom-left-radius: 999px;
}
.seg-warning   { width: 25%; background-color: var(--warning-line); }
.seg-good      { width: 25%; background-color: var(--success-line); }
.seg-excellent {
  width: 25%;
  background-color: var(--strong-line);
  border-top-right-radius: 999px;
  border-bottom-right-radius: 999px;
}

.meter-pointer {
  position: absolute;
  top: -4px;
  width: 5px;
  height: 16px;
  background: var(--text);
  border: 2px solid #ffffff;
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(28, 25, 23, 0.35);
  transform: translateX(-50%);
  transition: left 0.4s ease;
}

.meter-scale-markers {
  display: flex;
  justify-content: space-between;
  font-size: 0.66rem;
  color: var(--text-muted);
}

/* ==================== Ads ==================== */
.ad-container {
  margin: 28px 0;
  display: flex;
  justify-content: center;
}

.ad-slot {
  width: 100%;
  max-width: 728px;
  min-height: 90px;
  background: var(--bg-deep);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px;
  position: relative;
}

.ad-label {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #a8a29e;
}

.ad-placeholder-content {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==================== Below-fold info section ==================== */
.info-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-article {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.info-article h2 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
  letter-spacing: -0.015em;
}

.info-article p { margin-bottom: 12px; }
.info-article ul { padding-left: 20px; }
.info-article li { margin-bottom: 6px; }

.formula-box {
  background: var(--bg-deep);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin: 14px 0;
}

.formula-line {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
}

.formula-sub ul { padding-left: 20px; margin-top: 8px; }
.formula-sub li { margin-bottom: 6px; color: var(--text-body); }

/* ==================== Benchmark table ==================== */
.table-responsive {
  overflow-x: auto;
  margin-top: 14px;
}

.benchmark-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.benchmark-table th,
.benchmark-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.benchmark-table th {
  background-color: var(--bg-deep);
  font-weight: 700;
  color: var(--text);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Reflow into labeled stacked cards on narrow screens -- built in from the
   start, not a retrofit after a live bug report. */
@media (max-width: 640px) {
  .table-responsive { overflow-x: visible; }

  .benchmark-table thead { display: none; }

  .benchmark-table,
  .benchmark-table tbody,
  .benchmark-table tr,
  .benchmark-table td {
    display: block;
    width: 100%;
  }

  .benchmark-table tr {
    margin-bottom: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px 16px;
  }

  .benchmark-table tr:last-child { margin-bottom: 0; }

  .benchmark-table td {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
  }

  .benchmark-table td:last-child { border-bottom: none; }

  .benchmark-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.66rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 4px;
  }
}

.text-danger  { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-success { color: var(--success); }
.text-strong  { color: var(--strong); }

/* ==================== Footer ==================== */
.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--border);
  background: var(--card-bg);
  padding: 24px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-links { margin-top: 8px; }

.footer-links a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.footer-links a:hover { text-decoration: underline; }