/* ── Base ── */

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  overscroll-behavior: none;
}

body::-webkit-scrollbar {
  display: none;
}

/* ── Layout ── */

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom));
}

/* ── Header ── */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--bg-primary);
}

.header__title {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
  white-space: nowrap;
}

.header__date {
  font-size: var(--font-size-meta);
  font-weight: var(--font-weight-meta);
  color: var(--text-secondary);
  text-align: center;
  flex: 1;
  padding: 0 var(--space-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* ── Icon Buttons ── */

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: var(--icon-radius);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.icon-btn:active {
  background-color: var(--bg-card-hover);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

/* ── Habit List ── */

.habit-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
}

/* ── Habit Card ── */

.habit-card {
  background-color: var(--bg-card);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  gap: var(--card-content-gap);
}

.habit-card__top {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.habit-card__icon {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: var(--icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.habit-card__name {
  font-size: var(--font-size-name);
  font-weight: var(--font-weight-name);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Action Button ── */

.action-btn {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.action-btn--empty {
  background-color: var(--bg-button);
  color: var(--text-secondary);
}

.action-btn--partial {
  color: var(--text-primary);
}

.action-btn--complete {
  color: var(--text-primary);
}

.action-btn svg {
  width: 20px;
  height: 20px;
}

.action-btn.bounce {
  animation: scale-bounce 300ms ease;
}

@keyframes scale-bounce {
  0% { transform: scale(1); }
  40% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

/* ── Dot Grid ── */

.dot-grid {
  display: grid;
  grid-template-rows: repeat(var(--dot-rows), var(--dot-size));
  grid-auto-flow: column;
  grid-auto-columns: var(--dot-size);
  gap: var(--dot-gap);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  direction: ltr;
}

.dot-grid::-webkit-scrollbar {
  display: none;
}

.dot {
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background-color: var(--dot-empty);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.dot:not(.dot--readonly):active {
  transform: scale(1.4);
}

.dot--readonly {
  cursor: default;
  pointer-events: none;
}

/* ── Empty State ── */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  min-height: 40dvh;
}

.empty-state__icon {
  font-size: 48px;
  opacity: 0.4;
}

.empty-state__text {
  color: var(--text-secondary);
  font-size: var(--font-size-name);
}

.empty-state__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--accent-default);
  color: var(--text-primary);
  border-radius: var(--card-radius);
  font-size: var(--font-size-name);
  font-weight: var(--font-weight-name);
  transition: opacity var(--transition-fast);
}

.empty-state__btn:active {
  opacity: 0.8;
}

/* ── Form ── */

.form-page {
  padding-top: var(--space-md);
}

.form-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.form-header__title {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-meta);
  font-weight: var(--font-weight-meta);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-input);
  border: 1px solid var(--bg-card-hover);
  border-radius: var(--icon-radius);
  color: var(--text-primary);
  font-size: var(--font-size-name);
  min-height: var(--icon-size);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-default);
}

.form-input::placeholder {
  color: var(--text-disabled);
}

/* ── Emoji Picker ── */

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--icon-size), 1fr));
  gap: var(--space-sm);
}

.emoji-option {
  width: var(--icon-size);
  height: var(--icon-size);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  border-radius: var(--icon-radius);
  background-color: var(--bg-button);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.emoji-option:active {
  transform: scale(0.9);
}

.emoji-option--selected {
  background-color: var(--accent-default);
  transform: scale(1.05);
}

/* ── Color Picker ── */

.color-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-sm);
}

.color-option {
  aspect-ratio: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
  min-width: var(--icon-size);
  min-height: var(--icon-size);
}

.color-option:active {
  transform: scale(0.9);
}

.color-option--selected {
  outline: 3px solid var(--text-primary);
  outline-offset: 2px;
}

.color-option__check {
  display: none;
  color: var(--text-primary);
}

.color-option--selected .color-option__check {
  display: block;
}

.color-option__check svg {
  width: 20px;
  height: 20px;
}

/* ── Stepper ── */

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

.stepper__btn {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: 50%;
  background-color: var(--bg-button);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.stepper__btn:disabled {
  color: var(--text-disabled);
  cursor: not-allowed;
}

.stepper__btn:active:not(:disabled) {
  background-color: var(--bg-card-hover);
}

.stepper__value {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
  min-width: 32px;
  text-align: center;
}

.stepper__input {
  width: 56px;
  text-align: center;
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
  background-color: var(--bg-input);
  border: 1px solid var(--bg-card-hover);
  border-radius: var(--icon-radius);
  padding: var(--space-xs) 0;
  color: var(--text-primary);
  -moz-appearance: textfield;
}

.stepper__input::-webkit-outer-spin-button,
.stepper__input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ── Form Buttons ── */

.form-actions {
  display: flex;
  gap: var(--space-sm);
  padding-top: var(--space-md);
}

.btn {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--icon-radius);
  font-size: var(--font-size-name);
  font-weight: var(--font-weight-name);
  min-height: var(--icon-size);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
}

.btn:active {
  opacity: 0.8;
}

.btn--primary {
  background-color: var(--accent-default);
  color: var(--text-primary);
}

.btn--secondary {
  background-color: var(--bg-button);
  color: var(--text-primary);
}

.btn--danger {
  background-color: transparent;
  color: var(--color-red);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Auth Page ── */

.auth-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--space-lg);
}

.auth-card {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.auth-logo {
  text-align: center;
  font-size: 28px;
  font-weight: var(--font-weight-heading);
  padding-bottom: var(--space-sm);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.auth-toggle {
  text-align: center;
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
}

.auth-toggle a {
  color: var(--accent-default);
}

.auth-forgot {
  text-align: center;
  font-size: var(--font-size-meta);
}

.auth-forgot a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.auth-forgot a:hover {
  color: var(--text-primary);
}

.auth-error,
.auth-message {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--icon-radius);
  font-size: var(--font-size-meta);
  display: none;
}

.auth-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-red);
}

.auth-message {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-green);
}

.auth-error--visible,
.auth-message--visible {
  display: block;
  animation: fadeSlideIn var(--transition-normal);
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Signup Confirmation ── */

.auth-confirmation {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

.auth-confirmation--visible {
  display: flex;
  animation: fadeIn var(--transition-normal) forwards;
}

.auth-confirmation__icon {
  font-size: 48px;
  opacity: 0.9;
}

.auth-confirmation__title {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
}

.auth-confirmation__email {
  color: var(--accent-default);
  font-weight: var(--font-weight-name);
  word-break: break-all;
}

.auth-confirmation__hint {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  line-height: 1.5;
}

.auth-confirmation__change {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
}

.auth-confirmation__change a {
  color: var(--accent-default);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Loading ── */

.btn--loading {
  pointer-events: none;
  opacity: 0.7;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Skeleton Loading ── */

@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.skeleton {
  background-color: var(--bg-card-hover);
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-card {
  background-color: var(--bg-card);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  gap: var(--card-content-gap);
}

.skeleton-card__top {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.skeleton-card__icon {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: var(--icon-radius);
  flex-shrink: 0;
}

.skeleton-card__text {
  flex: 1;
  height: 17px;
  border-radius: 4px;
  max-width: 55%;
}

.skeleton-card__action {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-card__grid {
  height: 61px;
  border-radius: 4px;
}

.skeleton-detail__grid {
  height: 61px;
  border-radius: 4px;
}

.skeleton-detail__stat {
  height: 13px;
  width: 80px;
  border-radius: 4px;
}

.skeleton-detail__cell {
  aspect-ratio: 1;
  border-radius: var(--space-sm);
  min-height: 40px;
}

.detail-header__icon:empty {
  background-color: var(--bg-card-hover);
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.detail-header__name:empty {
  display: inline-block;
  min-width: 120px;
  height: 20px;
  background-color: var(--bg-card-hover);
  border-radius: 4px;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

/* ── Detail Page ── */

.detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
}

.detail-header__info {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  overflow: hidden;
}

.detail-header__icon {
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: var(--icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.detail-header__name {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-header__freq {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  margin-left: var(--space-xs);
}

/* ── Detail Overview ── */

.detail-overview {
  padding: var(--space-sm) 0;
}

.detail-stats {
  display: flex;
  gap: var(--space-md);
  padding-bottom: var(--space-sm);
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
}

.detail-stat strong {
  color: var(--text-primary);
}

/* ── Calendar ── */

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
}

.calendar-nav__label {
  font-size: var(--font-size-name);
  font-weight: var(--font-weight-name);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
  font-size: 11px;
  color: var(--text-secondary);
  padding-bottom: var(--space-xs);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.calendar-cell {
  aspect-ratio: 1;
  border-radius: var(--space-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  cursor: pointer;
  background-color: var(--bg-card);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  min-height: 40px;
}

.calendar-cell:active {
  transform: scale(0.92);
}

.calendar-cell--empty {
  background: none;
  cursor: default;
}

.calendar-cell--empty:active {
  transform: none;
}

.calendar-cell--today {
  outline: 2px solid var(--text-secondary);
  outline-offset: -2px;
}

.calendar-cell__day {
  font-weight: var(--font-weight-name);
  line-height: 1;
}

.calendar-cell__count {
  font-size: 9px;
  color: var(--text-secondary);
  line-height: 1;
  margin-top: 1px;
}

/* ── Description Text ── */

.description-text {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  padding: 0 0 var(--space-sm);
  line-height: 1.4;
}

/* ── Character Counter ── */

.char-counter {
  display: block;
  text-align: right;
  font-size: 11px;
  color: var(--text-disabled);
  margin-top: var(--space-xs);
}

/* ── Weekday Picker ── */

.weekday-picker {
  display: flex;
  gap: var(--space-sm);
}

.weekday-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: var(--font-weight-name);
  background-color: var(--bg-button);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.weekday-btn:active {
  transform: scale(0.92);
}

.weekday-btn--active {
  background-color: var(--accent-default);
  color: var(--text-primary);
}

/* ── Dot Grid Variants ── */

.dot--blank {
  background-color: transparent !important;
  cursor: default;
  pointer-events: none;
}

.dot--non-applicable {
  background-color: var(--dot-empty);
  opacity: 0.35;
  transform: scale(0.7);
}

.dot--non-applicable:active {
  transform: scale(1);
}

/* ── Calendar Cell Variants ── */

.calendar-cell--non-applicable {
  opacity: 0.4;
}

/* ── Requirements Editor ── */

.requirements-editor {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.requirement-row {
  background-color: var(--bg-card);
  border-radius: var(--icon-radius);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.requirement-row__main {
  display: flex;
  gap: var(--space-sm);
}

.requirement-row__name {
  flex: 1;
  min-width: 0;
}

.requirement-row__type {
  width: 140px;
  flex-shrink: 0;
}

.requirement-row__fields {
  display: flex;
  gap: var(--space-sm);
}

.requirement-row__unit {
  width: 80px;
  flex-shrink: 0;
}

.requirement-row__target {
  flex: 1;
  min-width: 0;
}

.requirement-row__actions {
  display: flex;
  gap: var(--space-xs);
  justify-content: flex-end;
}

.requirement-row__actions .icon-btn {
  width: 32px;
  height: 32px;
  font-size: 14px;
}

/* ── Popup / Modal ── */

.popup-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--space-md);
}

.popup {
  background-color: var(--bg-card);
  border-radius: var(--card-radius);
  width: 100%;
  max-width: 400px;
  max-height: 80vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.popup__header {
  padding: var(--space-md);
  font-size: var(--font-size-name);
  font-weight: var(--font-weight-heading);
  border-bottom: 1px solid var(--bg-card-hover);
}

.popup__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.popup__actions {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  display: flex;
  gap: var(--space-sm);
}

.popup__confirm {
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.popup__confirm-text {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-align: center;
}

/* ── Requirement Input (popup) ── */

.requirement-input {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.requirement-input__label {
  font-size: var(--font-size-meta);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.requirement-input__label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent-default);
}

/* ── Utility ── */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.hidden {
  display: none !important;
}

/* ── Branding ── */

.brand-accent {
  color: var(--accent-default);
}