#calculator-page {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --color-bg: #060608;
  --color-surface: #121217;
  --color-surface-2: #1e1e24;
  --color-surface-offset: #15151a;
  --color-border: #1e1e24;
  --color-divider: #15151a;
  --color-text: #ffffff;
  --color-text-muted: #9e9eb0;
  --color-text-faint: #626270;
  --color-text-inverse: #060608;
  --color-primary: #ff9f01; /* Orange redesigned */
  --color-primary-hover: #ffb347;
  --color-success: #10b981; /* Green redesigned */
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #ff9f01;
  --color-warning-bg: rgba(255, 159, 1, 0.1);
  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.35);
  --shadow-md: none;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --font-body: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;

  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  background:
    radial-gradient(circle at top left, rgba(255,159,1,0.06), transparent 35%),
    radial-gradient(circle at bottom right, rgba(16,185,129,0.04), transparent 30%),
    var(--color-bg);
  color: var(--color-text);
  padding: var(--space-12) 0;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}

#calculator-page * {
  box-sizing: border-box;
}

#calculator-page button, 
#calculator-page input, 
#calculator-page select {
  font: inherit;
}

#calculator-page .app {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-6);
}

#calculator-page .topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

#calculator-page .brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

#calculator-page .logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), transparent);
  display: grid;
  place-items: center;
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

#calculator-page .brand h1 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

#calculator-page .brand p {
  margin: 5px 0 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
#calculator-page .grid {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(320px, 0.95fr);
  gap: var(--space-6);
}

#calculator-page .panel {
  background: transparent;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
}

#calculator-page .panel-inner {
  padding: var(--space-6);
}

#calculator-page .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface-offset));
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#calculator-page .section-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

#calculator-page .section-copy {
  margin: 0 0 var(--space-6);
  color: var(--color-text-muted);
  max-width: 62ch;
  font-size: var(--text-sm);
}

#calculator-page .form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

#calculator-page .field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

#calculator-page .field.full {
  grid-column: 1 / -1;
}

#calculator-page label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
}

#calculator-page .hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: -2px;
}

#calculator-page input {
  width: 100%;
  min-height: 48px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive), background var(--transition-interactive), color var(--transition-interactive);
}

#calculator-page input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(255,159,1,0.15);
}

#calculator-page .actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

#calculator-page .btn {
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive);
}

#calculator-page .btn:hover {
  transform: translateY(-1px);
}

#calculator-page .btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

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

#calculator-page .btn-secondary {
  background: var(--color-surface-offset);
  color: var(--color-text);
  border-color: var(--color-border);
}

#calculator-page .results {
  display: grid;
  gap: var(--space-4);
}

#calculator-page .metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

#calculator-page .metric {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  transition: background var(--transition-interactive), border-color var(--transition-interactive);
}

#calculator-page .metric span {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

#calculator-page .metric strong {
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
}

#calculator-page .hero-metric {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 18%, var(--color-surface-offset)), var(--color-surface));
  border: 1px solid rgba(255, 159, 1, 0.2);
  transition: background var(--transition-interactive), border-color var(--transition-interactive);
}

#calculator-page .hero-metric strong {
  display: block;
  font-size: clamp(1.9rem, 1.3rem + 1.8vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.05em;
  margin: var(--space-2) 0;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
}

#calculator-page .hero-metric p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

#calculator-page .status, 
#calculator-page .formula, 
#calculator-page .summary-card {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  transition: background var(--transition-interactive), border-color var(--transition-interactive);
}

#calculator-page .status strong, 
#calculator-page .formula strong, 
#calculator-page .summary-card strong {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text);
}

#calculator-page .status p, 
#calculator-page .formula p, 
#calculator-page .summary-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

#calculator-page .status.ok { 
  background: var(--color-success-bg); 
  color: var(--color-success); 
  border-color: color-mix(in srgb, var(--color-success) 22%, transparent); 
}

#calculator-page .status.warn { 
  background: var(--color-warning-bg); 
  color: var(--color-warning); 
  border-color: color-mix(in srgb, var(--color-warning) 22%, transparent); 
}

#calculator-page .status.error { 
  background: var(--color-error-bg); 
  color: var(--color-error); 
  border-color: color-mix(in srgb, var(--color-error) 22%, transparent); 
}

#calculator-page .status.ok p, 
#calculator-page .status.warn p, 
#calculator-page .status.error p { 
  color: currentColor; 
}

#calculator-page .mini-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: grid;
  gap: var(--space-3);
}

#calculator-page .mini-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

#calculator-page .mini-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

#calculator-page .mini-list strong {
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
}

#calculator-page .footer-note {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 940px) {
  #calculator-page .grid {
    grid-template-columns: 1fr;
  }
}

#calculator-page .topbar {
  position: relative;
  top: 0;
  left: 0;
  width: auto;
  background: transparent;
  box-shadow: none;
}

@media (max-width: 640px) {
  #calculator-page .app {
    padding: var(--space-4);
  }
  #calculator-page .form-grid, 
  #calculator-page .metric-grid {
    grid-template-columns: 1fr;
  }
  #calculator-page .topbar {
    align-items: flex-start;
  }
}