:root {
  --bg:             #F7F7F5;
  --surface:        #FFFFFF;
  --surface-alt:    #F0F0ED;
  --border:         #E4E4E0;
  --text:           #111111;
  --text-muted:     #6B7280;
  --accent:         #16A34A;
  --accent-subtle:  #F0FDF4;
  --accent-text:    #15803D;
  --shadow:         0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --chart-invested: #C4D4E0;
  --chart-interest: #22C55E;
  --chart-real:     #F97316;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:            #0C0C0C;
    --surface:       #161616;
    --surface-alt:   #202020;
    --border:        #2C2C2C;
    --text:          #F2F2F2;
    --text-muted:    #8B8B8B;
    --accent:        #22C55E;
    --accent-subtle: #052E16;
    --accent-text:   #4ADE80;
    --shadow:        0 1px 3px rgba(0,0,0,.4);
    --chart-invested: #2E3F52;
    --chart-interest: #4ADE80;
    --chart-real:     #FB923C;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 12px 60px;
}

/* ── Top navigation ─────────────────────── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topnav-inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
}

.topnav-brand {
  font-size: .9375rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text);
  white-space: nowrap;
}
.topnav-brand em {
  font-style: normal;
  color: var(--accent);
}

.topnav-links {
  display: flex;
  gap: 4px;
}

.topnav-link {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 8px;
  transition: background .13s, color .13s;
}

.topnav-link:hover { color: var(--text); }

.topnav-link.on {
  color: var(--text);
  background: var(--surface-alt);
}

/* ── Header ─────────────────────────────── */
header { margin-bottom: 28px; }

.logo {
  font-size: 2.125rem;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1;
}
.logo em {
  font-style: normal;
  color: var(--accent);
}

.sub {
  margin-top: 5px;
  font-size: .8125rem;
  color: var(--text-muted);
  letter-spacing: .01em;
}

/* ── Cards ──────────────────────────────── */
.card {
  --cp: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: var(--cp);
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}

.card-label {
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 18px;
}

/* ── Fields ─────────────────────────────── */
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }

.field > label {
  display: block;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 7px;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ── Number inputs ───────────────────────── */
.inp-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

.inp-affix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: .875rem;
  pointer-events: none;
  user-select: none;
}
.inp-affix.pre { left: 11px; }
.inp-affix.suf { right: 11px; }

input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
  appearance: textfield;
  -moz-appearance: textfield;
}
input.has-pre  { padding-left: 34px; }
input.has-suf  { padding-right: 30px; }
input.pre-wide { padding-left: 40px; }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
input:focus { border-color: var(--accent); }

/* ── Segmented toggles ───────────────────── */
.seg {
  display: flex;
  align-items: stretch;
  background: var(--surface-alt);
  border: 1.5px solid var(--border);
  border-radius: 9px;
  padding: 3px;
  gap: 2px;
  flex-shrink: 0;
  height: 42px;
}

.seg button {
  padding: 6px 11px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: .8125rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background .13s, color .13s, box-shadow .13s;
  white-space: nowrap;
  line-height: 1;
}

.seg button.on {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,.12);
}

.seg.fixed        { width: 162px; }
.seg.fixed button { flex: 1; }
.seg.auto         { width: fit-content; }

/* ── Results ─────────────────────────────── */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}

.stat {
  background: var(--surface-alt);
  border-radius: 10px;
  padding: 13px 15px;
}

.stat.full { grid-column: span 2; }

.stat-label {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 5px;
}

.stat-val {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--text);
}

/* Hero result */
.real-val {
  background: var(--accent-subtle);
  border: 1.5px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 12px;
  overflow: hidden;
}

.real-val-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
}

.real-val-divider {
  border: none;
  border-top: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  margin: 0;
}

.real-val-meta { flex: 1; min-width: 0; }

.real-val-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--accent-text);
  opacity: .7;
}

.real-val-note {
  font-size: .6875rem;
  color: var(--accent-text);
  opacity: .55;
  margin-top: 3px;
}

.real-val-amount {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -.035em;
  color: var(--accent-text);
  white-space: nowrap;
}

.real-val-row.compact .real-val-amount {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -.025em;
}

/* ── Narrative message blocks ────────────── */
.msg {
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--text-muted);
}
.msg strong { color: var(--text); font-weight: 700; }
.msg.good { color: var(--accent-text); }
.msg.good strong { color: var(--accent-text); }
.msg + .msg { margin-top: 8px; }

/* ── Progress bar ─────────────────────────── */
.progress-track {
  height: 8px;
  border-radius: 4px;
  background: var(--surface-alt);
  overflow: hidden;
  margin-top: 10px;
}
.progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--accent);
  transition: width .2s;
}

/* ── Table ───────────────────────────────── */
.tbl-outer {
  overflow-x: auto;
  margin: 0 calc(-1 * var(--cp));
  padding: 0 var(--cp);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .8125rem;
}

thead th {
  text-align: right;
  padding: 0 10px 10px;
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
thead th:first-child { text-align: left; padding-left: 0; }
thead th:last-child  { padding-right: 0; }

tbody tr { transition: background .1s; }
tbody tr:hover { background: var(--surface-alt); }
tbody tr.reached { background: var(--accent-subtle); }

tbody td {
  text-align: right;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
tbody td:first-child { text-align: left; padding-left: 0; font-weight: 600; }
tbody td:last-child  { padding-right: 0; color: var(--accent-text); font-weight: 600; }
tbody tr:last-child td { border-bottom: none; }

/* ── Chart ───────────────────────────────── */
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .75rem;
  color: var(--text-muted);
}
.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}
.legend-rule {
  width: 18px;
  height: 2.5px;
  border-radius: 2px;
  flex-shrink: 0;
}
canvas { display: block; width: 100%; height: 240px; }

/* ── Footer ──────────────────────────────── */
footer {
  margin-top: 32px;
  text-align: center;
  font-size: .75rem;
  color: var(--text-muted);
  opacity: .6;
}

/* ── Responsive ──────────────────────────── */
@media (min-width: 400px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  .card { --cp: 20px; }
}

@media (min-width: 480px) {
  .wrap { padding-top: 44px; }
  .logo { font-size: 2.625rem; }
  .real-val-amount { font-size: 2rem; }
}