:root {
  --color-primary-50: #effcf6;
  --color-primary-100: #c9f7e5;
  --color-primary-500: #149a6b;
  --color-primary-600: #0f7a56;
  --color-primary-700: #0d6146;
  --color-bg: #f4f7f5;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-danger-bg: #fef2f2;
  --color-danger-text: #b91c1c;
  --radius: 12px;
  --radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1613;
    --color-surface: #182019;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #253028;
    --color-danger-bg: #450a0a;
    --color-danger-text: #fca5a5;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  background: var(--color-bg);
  color: var(--color-text);
}

a {
  color: var(--color-primary-600);
}

:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

button {
  font: inherit;
}

/* Auth page */
.auth-page {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 360px;
}

.auth-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 4px;
  text-align: center;
}

.subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin: 0 0 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* Forms */
.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 44px;
}

.toggle-password {
  position: absolute;
  inset: 0 0 0 auto;
  width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
}

.toggle-password .icon-eye-off {
  display: none;
}

.toggle-password[data-state="visible"] .icon-eye {
  display: none;
}

.toggle-password[data-state="visible"] .icon-eye-off {
  display: block;
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary-600);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 150ms ease;
}

.btn-primary:hover {
  background: var(--color-primary-700);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
}

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

.alert {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

.alert-success {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

@media (prefers-color-scheme: dark) {
  .alert-success {
    background: rgba(20, 154, 107, 0.15);
    color: #6ee7b7;
  }
}

/* Dashboard */
.dashboard {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.dashboard-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.user-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 720px) {
  .user-grid {
    grid-template-columns: 1fr;
  }
}

.user-card h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.you-badge {
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-left: 8px;
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 2px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.stat-value.is-positive-change {
  color: var(--color-text);
}

.stat-value.is-loss {
  color: var(--color-primary-600);
}

.stat-sub {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 2px 0 0;
}

.chart-wrap {
  height: 190px;
  margin-bottom: 8px;
}

.empty-state {
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 16px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.entry-form-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.entry-form-section h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.date-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.date-row label {
  font-size: 0.875rem;
  font-weight: 500;
}

.date-row input {
  min-height: 44px;
  padding: 8px 12px;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

.unit-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 16px;
}

.unit-toggle button {
  min-height: 40px;
  padding: 0 16px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
}

.unit-toggle button.active {
  background: var(--color-primary-600);
  color: white;
}

.field-row {
  display: flex;
  gap: 12px;
}

.field-row .field {
  flex: 1;
}