:root {
  --color-bg: #0b0d10;
  --color-bg-soft: #10151c;
  --color-panel: #151b23;
  --color-panel-strong: #1b2430;
  --color-border: #263241;
  --color-text: #f4f7fb;
  --color-text-muted: #aab6c5;
  --color-text-soft: #d8e0ea;
  --color-accent: #58bf43;
  --color-accent-soft: rgba(88, 191, 67, 0.14);
  --color-accent-border: rgba(88, 191, 67, 0.42);
  --shadow-card: none;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
}

.brand {
  color: var(--color-text);
}

.brand-mark {
  background: linear-gradient(135deg, var(--color-accent), #8be06f);
  color: #081006;
  box-shadow: none;
}

.site-nav {
  color: var(--color-text-muted);
}

.site-nav a {
  color: var(--color-text-muted);
}

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

.hero-label {
  border-color: var(--color-accent-border);
  background: var(--color-accent-soft);
  color: #bdf0ae;
}

.hero h1 {
  color: var(--color-text);
}

.hero p,
.section-lead,
.store-note {
  color: var(--color-text-muted);
}

.button-primary {
  background: var(--color-accent);
  color: #081006;
  box-shadow: none;
}

.button-primary:hover {
  color: #081006;
  filter: brightness(1.05);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-border);
  color: var(--color-text-soft);
}

.button-secondary:hover {
  border-color: var(--color-accent-border);
  color: var(--color-text);
}

.panel {
  background: rgba(21, 27, 35, 0.86);
  border-color: var(--color-border);
  box-shadow: none;
}

.card,
.privacy-item,
.notice {
  background: rgba(21, 27, 35, 0.78);
  border-color: var(--color-border);
  box-shadow: none;
}

.card h2,
.card h3,
.privacy-item h3,
.section-heading {
  color: var(--color-text);
}

.card p,
.privacy-item p,
.notice {
  color: var(--color-text-muted);
}

.notice a {
  color: var(--color-accent);
  font-weight: 760;
}

.site-footer {
  border-top-color: rgba(255, 255, 255, 0.08);
  color: var(--color-text-muted);
}

.proportion-preview {
  padding: 28px;
}

.calculator-mock {
  border-radius: 26px;
  border: 1px solid #2d3948;
  background: #0b0d10;
  padding: 22px;
}

.calculator-mock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.calculator-mock-title {
  color: var(--color-accent);
  font-size: 0.88rem;
  font-weight: 820;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.calculator-mock-badge {
  border-radius: 999px;
  border: 1px solid var(--color-accent-border);
  color: #bdf0ae;
  background: var(--color-accent-soft);
  padding: 4px 9px;
  font-size: 0.76rem;
  font-weight: 760;
  white-space: nowrap;
}

.proportion-formula {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 10px;
  align-items: center;
  color: var(--color-text-muted);
  font-weight: 760;
}

.proportion-input {
  min-height: 54px;
  border-radius: 14px;
  border: 1px solid #344255;
  background: #111820;
  display: grid;
  place-items: center;
  color: var(--color-text);
  font-size: 1.05rem;
}

.proportion-input-answer {
  border-color: rgba(88, 191, 67, 0.8);
  color: var(--color-accent);
  font-weight: 820;
  box-shadow: none;
}

.proportion-result {
  margin-top: 22px;
  border-radius: 18px;
  background: rgba(88, 191, 67, 0.12);
  border: 1px solid rgba(88, 191, 67, 0.34);
  padding: 18px;
}

.proportion-result span {
  display: block;
  color: #a8e89a;
  font-size: 0.86rem;
  font-weight: 760;
}

.proportion-result strong {
  display: block;
  margin-top: 4px;
  font-size: 2.1rem;
  line-height: 1.1;
  color: var(--color-accent);
}

.proportion-history {
  margin-top: 18px;
  border-radius: 18px;
  border: 1px solid #263241;
  background: #111820;
  padding: 16px;
}

.proportion-history-title {
  margin: 0 0 10px;
  color: var(--color-text-soft);
  font-size: 0.88rem;
  font-weight: 780;
}

.proportion-history-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.proportion-history-row + .proportion-history-row {
  margin-top: 8px;
}

.proportion-history-row strong {
  color: var(--color-accent);
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text-muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--color-accent);
}

.store-note {
  margin-top: 22px;
  font-size: 0.95rem;
}

.privacy-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.privacy-item {
  border-radius: var(--radius-md);
  padding: 22px;
}

.tag {
  border-color: var(--color-accent-border);
  color: #bdf0ae;
  background: var(--color-accent-soft);
}

@media (max-width: 880px) {
  .proportion-preview {
    padding: 18px;
  }

  .proportion-formula {
    grid-template-columns: 1fr auto 1fr;
  }

  .proportion-equals {
    grid-column: 1 / -1;
    text-align: center;
  }

  .privacy-summary {
    grid-template-columns: 1fr;
  }
}