/* ============================================
   PeriodGuide.com — Components CSS
   Reusable UI components
   ============================================ */

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-3) 0;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: var(--text-xl);
  color: var(--color-primary);
  text-decoration: none;
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-lg);
}

.nav__links {
  display: none;
  list-style: none;
  gap: var(--space-1);
  padding: 0;
  margin: 0;
}

@media (min-width: 1024px) {
  .nav__links { display: flex; }
}

.nav__links a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-gray-700);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--color-primary);
  background: var(--color-primary-pale);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  padding: var(--space-1);
}

.lang-switcher__btn {
  padding: var(--space-1) var(--space-2);
  border: none;
  background: transparent;
  color: var(--color-gray-600);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.lang-switcher__btn:hover {
  color: var(--color-primary);
}
.lang-switcher__btn.active {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}

/* Mobile Menu */
.nav__mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.nav__mobile-toggle:hover {
  background: var(--color-gray-100);
}

@media (min-width: 1024px) {
  .nav__mobile-toggle { display: none; }
}

.nav__mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-gray-700);
  position: relative;
  transition: all var(--transition-fast);
}
.nav__mobile-toggle span::before,
.nav__mobile-toggle span::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--color-gray-700);
  left: 0;
  transition: all var(--transition-fast);
}
.nav__mobile-toggle span::before { top: -6px; }
.nav__mobile-toggle span::after { top: 6px; }

.nav__mobile-toggle[aria-expanded="true"] span {
  background: transparent;
}
.nav__mobile-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}
.nav__mobile-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile Menu Panel */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  background: var(--color-white);
  padding: var(--space-20) var(--space-6) var(--space-6);
  overflow-y: auto;
}
.mobile-menu.open { display: block; }

.mobile-menu__links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mobile-menu__links a {
  display: block;
  padding: var(--space-4) var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-gray-800);
  border-bottom: 1px solid var(--color-gray-100);
  transition: color var(--transition-fast);
}
.mobile-menu__links a:hover,
.mobile-menu__links a.active {
  color: var(--color-primary);
}

.mobile-menu__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  border: none;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--color-gray-700);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  box-shadow: var(--shadow-md), 0 2px 8px rgba(232, 93, 117, 0.3);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg), 0 4px 12px rgba(232, 93, 117, 0.4);
  color: var(--color-white);
}
.btn--primary:active { transform: translateY(0); }

.btn--secondary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
  color: var(--color-white);
  box-shadow: var(--shadow-md), 0 2px 8px rgba(124, 92, 252, 0.3);
}
.btn--secondary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg), 0 4px 12px rgba(124, 92, 252, 0.4);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-gray-700);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
  min-height: 52px;
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
  min-height: 36px;
}

.btn--full { width: 100%; }

.btn--icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
  transition: all var(--transition-base);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

@media (min-width: 768px) {
  .card__image { height: 240px; }
}

.card__body {
  padding: var(--space-5);
}

@media (min-width: 768px) {
  .card__body { padding: var(--space-6); }
}

.card__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-pale);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
  color: var(--color-black);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

/* Card Variants */
.card--featured {
  border: 2px solid var(--color-primary-light);
  box-shadow: var(--shadow-md);
}
.card--featured:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card--phase {
  position: relative;
  overflow: visible;
}
.card--phase::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.card--menstrual::before { background: var(--color-menstrual); }
.card--follicular::before { background: var(--color-follicular); }
.card--ovulation::before { background: var(--color-ovulation); }
.card--luteal::before { background: var(--color-luteal); }

/* --- Evidence Badge --- */
.evidence-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  letter-spacing: 0.3px;
}
.evidence-badge--strong {
  background: #E8F5E9;
  color: #2E7D32;
}
.evidence-badge--moderate {
  background: #E3F2FD;
  color: #1565C0;
}
.evidence-badge--emerging {
  background: #FFF3E0;
  color: #E65100;
}
.evidence-badge--traditional {
  background: #F3E5F5;
  color: #6A1B9A;
}

/* --- Phase Indicator --- */
.phase-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

.phase-indicator--menstrual {
  background: rgba(232, 93, 117, 0.12);
  color: var(--color-menstrual);
}
.phase-indicator--follicular {
  background: rgba(86, 184, 112, 0.12);
  color: var(--color-follicular);
}
.phase-indicator--ovulation {
  background: rgba(245, 166, 35, 0.12);
  color: var(--color-ovulation);
}
.phase-indicator--luteal {
  background: rgba(124, 92, 252, 0.12);
  color: var(--color-luteal);
}

.phase-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}
.phase-dot--menstrual { background: var(--color-menstrual); }
.phase-dot--follicular { background: var(--color-follicular); }
.phase-dot--ovulation { background: var(--color-ovulation); }
.phase-dot--luteal { background: var(--color-luteal); }

/* --- Forms --- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-gray-900);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 44px;
}
.form-input:hover { border-color: var(--color-gray-400); }
.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(232, 93, 117, 0.15);
  outline: none;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23757575' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

textarea.form-input {
  min-height: 100px;
  resize: vertical;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

/* --- Range Slider --- */
.range-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  outline: none;
  transition: background var(--transition-fast);
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}
.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.range-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

/* --- Toggle --- */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.toggle__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle__slider {
  width: 48px;
  height: 26px;
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
}
.toggle__slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: var(--color-white);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.toggle__input:checked + .toggle__slider {
  background: var(--color-primary);
}
.toggle__input:checked + .toggle__slider::after {
  transform: translateX(22px);
}
.toggle__input:focus-visible + .toggle__slider {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.toggle__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-700);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 2px solid var(--color-gray-200);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-600);
  border: none;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  min-height: 44px;
}
.tab:hover { color: var(--color-primary); }
.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
  padding: var(--space-6) 0;
}
.tab-panel.active { display: block; }

/* --- Chip / Tag --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.chip:hover {
  background: var(--color-gray-200);
}
.chip.selected {
  background: var(--color-primary-pale);
  color: var(--color-primary);
  border-color: var(--color-primary-light);
}

/* --- Alert / Banner --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.alert--danger {
  background: #FFEBEE;
  color: #C62828;
  border-left: 4px solid var(--color-danger);
}
.alert--warning {
  background: #FFF8E1;
  color: #E65100;
  border-left: 4px solid var(--color-warning);
}
.alert--info {
  background: #E3F2FD;
  color: #1565C0;
  border-left: 4px solid var(--color-info);
}
.alert--success {
  background: #E8F5E9;
  color: #2E7D32;
  border-left: 4px solid var(--color-success);
}

.alert__icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.alert__content { flex: 1; }
.alert__title {
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-1);
}

/* --- Progress Bar --- */
.progress {
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-slow);
}

/* --- Tooltip --- */
.tooltip {
  position: relative;
  display: inline-block;
}
.tooltip__content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-900);
  color: var(--color-white);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
}
.tooltip__content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-gray-900);
}
.tooltip:hover .tooltip__content {
  opacity: 1;
  visibility: visible;
}

/* --- Modal --- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.modal-backdrop.open { display: flex; }

.modal {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-6);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.modal__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
}

.modal__close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  transition: background var(--transition-fast);
}
.modal__close:hover { background: var(--color-gray-200); }

/* --- Footer --- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer__brand {
  max-width: 300px;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-extrabold);
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-4);
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer__links li { margin-bottom: var(--space-2); }
.footer__links a {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.footer__links a:hover { color: var(--color-white); }

.footer__bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copy {
  font-size: var(--text-sm);
}

.footer__privacy-badges {
  display: flex;
  gap: var(--space-3);
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: rgba(46, 204, 113, 0.15);
  color: #2ECC71;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
}

/* --- Skeleton Loading --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Toast / Notification --- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-900);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  font-size: var(--text-sm);
  animation: toast-in var(--transition-spring) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Cycle Wheel (Hero Component) --- */
.cycle-wheel {
  position: relative;
  width: 280px;
  height: 280px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .cycle-wheel { width: 340px; height: 340px; }
}

@media (min-width: 768px) {
  .cycle-wheel { width: 400px; height: 400px; }
}

.cycle-wheel__ring {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  border: 12px solid var(--color-gray-200);
}

.cycle-wheel__segment {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
}

.cycle-wheel__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60%;
  height: 60%;
  background: var(--color-white);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4);
}

.cycle-wheel__day {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--weight-extrabold);
  color: var(--color-primary);
  line-height: 1;
}

.cycle-wheel__phase {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-gray-600);
  margin-top: var(--space-1);
}

/* --- Stat Card --- */
.stat-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  text-align: center;
}

.stat-card__value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--weight-extrabold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  font-weight: var(--weight-medium);
}

/* --- Day Selector Grid --- */
.day-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-2);
  max-width: 400px;
  margin: 0 auto;
}

.day-grid__cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-gray-200);
  background: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 40px;
  min-height: 40px;
}
.day-grid__cell:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-pale);
  color: var(--color-primary);
}
.day-grid__cell.selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--weight-bold);
}
.day-grid__cell.today {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Phase coloring for day grid */
.day-grid__cell[data-phase="menstrual"] {
  border-color: rgba(232, 93, 117, 0.3);
  background: rgba(232, 93, 117, 0.05);
}
.day-grid__cell[data-phase="follicular"] {
  border-color: rgba(86, 184, 112, 0.3);
  background: rgba(86, 184, 112, 0.05);
}
.day-grid__cell[data-phase="ovulation"] {
  border-color: rgba(245, 166, 35, 0.3);
  background: rgba(245, 166, 35, 0.05);
}
.day-grid__cell[data-phase="luteal"] {
  border-color: rgba(124, 92, 252, 0.3);
  background: rgba(124, 92, 252, 0.05);
}