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

:root {
  --bg: #0d0d0d;
  --surface: #141414;
  --border: #2a2a2a;
  --accent: #c8f562;
  --accent-dim: rgba(200, 245, 98, 0.12);
  --text: #f0ede8;
  --muted: #666;
  --red: #ff5e5e;
  --blue: #5eb8ff;
  --radius: 4px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.wrapper {
  width: 100%;
  max-width: 680px;
}

/* Header */
.header {
  margin-bottom: 3rem;
}
.header .label {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.header h1 {
  font-family: 'Fraunces', serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 300;
  line-height: 1.1;
  color: var(--text);
}
.header h1 em {
  font-style: italic;
  color: var(--accent);
}

/* Toggle */
.mode-toggle {
  display: flex;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 2rem;
  width: fit-content;
}
.mode-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 1.2rem;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.2s;
}
.mode-btn.active {
  background: var(--accent);
  color: #0d0d0d;
  font-weight: 500;
}

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.field-group {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field label {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.input-row {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}
.input-row:focus-within {
  border-color: var(--accent);
}

.currency-prefix {
  background: #1e1e1e;
  border-right: 1px solid var(--border);
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  user-select: none;
}

.input-row input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 1rem;
  padding: 0.75rem 1rem;
}
.input-row input::placeholder { color: #444; }

.unit-select {
  background: #1e1e1e;
  border-left: 1px solid var(--border);
  border-right: none;
  border-top: none;
  border-bottom: none;
  outline: none;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  padding: 0.75rem 0.8rem;
  cursor: pointer;
  appearance: none;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--border);
  margin: 2rem 0;
}

/* Results */
.results-label {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.result-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  position: relative;
  transition: border-color 0.3s, transform 0.3s;
}
.result-box.highlight {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.result-box .rb-label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.result-box .rb-value {
  font-family: 'Fraunces', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.result-box.highlight .rb-value {
  color: var(--accent);
}
.result-box .rb-sub {
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 0.4rem;
}
.result-box .badge {
  position: absolute;
  top: 0.6rem;
  right: 0.7rem;
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--accent);
  color: #0d0d0d;
  padding: 2px 6px;
  border-radius: 2px;
  font-weight: 500;
}

/* Equity row */
.equity-row {
  margin-top: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.equity-row .eq-label {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.equity-bar-wrap {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.equity-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 0.5s cubic-bezier(.22,1,.36,1);
  width: 0%;
}
.equity-pct {
  font-family: 'Fraunces', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 60px;
  text-align: right;
}

/* Formula note */
.formula-note {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.7;
}
.formula-note strong {
  color: var(--text);
  font-weight: 500;
}
.formula-note .formula {
  color: var(--accent);
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

/* Footer */
.footer {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer a {
  color: var(--accent);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.footer a:hover {
  opacity: 1;
}

/* Animation */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-box, .equity-row {
  animation: fadeUp 0.35s ease both;
}

/* Optional field tag */
.optional-tag {
  color: #444;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
}

/* Equity note */
.equity-note {
  margin-top: 0.5rem;
  font-size: 0.65rem;
  color: var(--muted);
  text-align: right;
  letter-spacing: 0.04em;
}