:root {
  --color-bg: #0a0e1a;
  --color-surface: #121a2b;
  --color-surface-alt: #1a2438;
  --color-border: #2a3552;
  --color-text: #e8ecf5;
  --color-text-dim: #8b96b3;
  --color-accent-pro: #4fd1a5;
  --color-accent-contra: #e0765f;
  --color-gold: #c9a869;
  --font-heading: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  --font-mono: 'Courier New', Courier, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.5;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.page--centered {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.app-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.app-header h1 {
  font-family: var(--font-heading);
  font-weight: normal;
  letter-spacing: 0.05em;
  color: var(--color-gold);
  margin: 0;
}

.link-button {
  background: none;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: underline;
  padding: 4px;
}

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

.date-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

.date-label {
  font-family: var(--font-heading);
  color: var(--color-text);
  min-width: 220px;
  text-align: center;
}

.icon-button {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 1rem;
}

.icon-button:hover {
  background: var(--color-border);
}

.balance-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  margin-bottom: 24px;
}

.balance-svg {
  width: 100%;
  max-width: 300px;
  height: auto;
}

#balance-beam {
  transform-origin: 150px 90px;
  transition: transform 0.4s ease;
}

.balance-pan-label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--color-bg);
  font-weight: bold;
}

.balance-score {
  margin-top: 8px;
  font-family: var(--font-mono);
  color: var(--color-text-dim);
}

#balance-score {
  color: var(--color-gold);
  font-weight: bold;
}

.habit-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.habit-section h2 {
  font-family: var(--font-heading);
  font-weight: normal;
  color: var(--color-gold);
  font-size: 1.05rem;
  margin: 0 0 12px;
  letter-spacing: 0.03em;
}

.habit-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.habit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.habit-row:last-child {
  border-bottom: none;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  width: 100%;
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-accent-pro);
  cursor: pointer;
  flex-shrink: 0;
}

.habit-name {
  color: var(--color-text);
}

.stepper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stepper-btn {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

.stepper-btn:hover:not(:disabled) {
  background: var(--color-border);
}

.stepper-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.stepper-value {
  font-family: var(--font-mono);
  min-width: 56px;
  text-align: center;
  color: var(--color-accent-contra);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.field-row label {
  color: var(--color-text);
}

.field-row input[type="time"] {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 6px;
  padding: 6px 10px;
  font-family: var(--font-mono);
}

.login-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 360px;
}

.login-card h1 {
  font-family: var(--font-heading);
  color: var(--color-gold);
  margin: 0 0 4px;
  text-align: center;
}

.login-subtitle {
  text-align: center;
  color: var(--color-text-dim);
  margin: 0 0 24px;
  font-size: 0.9rem;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#login-form label {
  color: var(--color-text-dim);
  font-size: 0.85rem;
  margin-top: 10px;
}

#login-form input {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 1rem;
}

#login-form input:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 1px;
}

.form-error {
  color: var(--color-accent-contra);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin: 8px 0 0;
}

.primary-button {
  margin-top: 12px;
  background: var(--color-gold);
  color: var(--color-bg);
  border: none;
  border-radius: 6px;
  padding: 12px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
}

.primary-button:hover:not(:disabled) {
  filter: brightness(1.1);
}

.primary-button:disabled {
  opacity: 0.6;
  cursor: default;
}