/* ═══════════════════════════════════════
   Form System — Design System 2.0
   ═══════════════════════════════════════ */

/* Form card — centered, airy layout */
.form-card {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-xl) 0;
}

/* ── Form Group ── */
.form-group {
  margin-bottom: var(--space-xl);
}

/* ── Labels: uppercase micro-label ── */
.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-label abbr {
  color: var(--accent);
  text-decoration: none;
  margin-left: 2px;
}

/* ── Inputs: borderless, background-driven ── */
.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: var(--text-base);
  font-family: inherit;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast);
  min-height: 48px;
}

.form-input:hover {
  background: var(--surface-3);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

/* Error state */
.form-input--error {
  border-color: var(--danger);
  animation: shake 0.5s var(--ease-spring);
}

.form-input--error:focus {
  box-shadow: 0 0 0 3px var(--danger-bg);
}

.form-input::placeholder {
  color: var(--text-faint);
  opacity: 0.7;
}

/* ── Select ── */
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-xl) var(--space-sm) var(--space-md);
  background-color: var(--surface-2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: var(--text-base);
  font-family: inherit;
  min-height: 48px;
  cursor: pointer;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background-color var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238d95b2' viewBox='0 0 16 16'%3E%3Cpath d='m8 11-5-5h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
}

.form-select:hover {
  background-color: var(--surface-3);
}

.form-select:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--surface-2);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

.form-select option {
  background: var(--surface);
  color: var(--text);
}

/* ── Checkbox: custom styled ── */
.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  min-height: 48px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.form-checkbox:hover {
  background: var(--surface-hover);
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: border-color var(--transition-fast),
              background var(--transition-fast),
              box-shadow var(--transition-fast);
}

.form-checkbox input[type="checkbox"]:hover {
  background: var(--surface-3);
}

.form-checkbox input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.form-checkbox input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.form-checkbox input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-muted);
}

.form-checkbox__label {
  font-size: var(--text-base);
  color: var(--text);
  user-select: none;
}

/* ── Error / Hint messages ── */
.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--danger);
}

.form-error::before {
  content: '';
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='currentColor'%3E%3Cpath d='M8 1a7 7 0 100 14A7 7 0 008 1zm-.75 3.75a.75.75 0 011.5 0v3.5a.75.75 0 01-1.5 0v-3.5zM8 11a1 1 0 100 2 1 1 0 000-2z'/%3E%3C/svg%3E") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='currentColor'%3E%3Cpath d='M8 1a7 7 0 100 14A7 7 0 008 1zm-.75 3.75a.75.75 0 011.5 0v3.5a.75.75 0 01-1.5 0v-3.5zM8 11a1 1 0 100 2 1 1 0 000-2z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.form-hint {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--text-faint);
  line-height: var(--leading-snug);
}

/* ── Two-column row ── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

/* ── Hours preview in timesheet form ── */
.hours-preview {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  font-variant-numeric: tabular-nums;
  color: var(--text);
  line-height: var(--leading-tight);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent-muted);
  border-radius: var(--radius-md);
  display: inline-block;
  transition: transform 0.25s var(--ease-spring), color 300ms ease;
}

.hours-preview--updated {
  transform: scale(1.08);
  color: var(--accent);
}

/* ── Time select (dual dropdowns for hour:minute) ── */
.time-select {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.time-select .form-select { flex: 1; }

.time-select__separator {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-faint);
}

/* ── Form actions ── */
.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-top: var(--space-xl);
  margin-top: var(--space-lg);
  border-top: 1px solid var(--border-subtle);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .form-input,
  .form-select { min-height: 52px; }

  .form-actions {
    flex-direction: column;
    position: sticky;
    bottom: 0;
    background: var(--bg);
    margin: 0 calc(-1 * var(--space-lg));
    padding: var(--space-md) var(--space-lg);
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--border-subtle);
    z-index: var(--z-sticky);
  }
}

/* ── PIN input: 4 digit cells ── */
.pin-input {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.pin-input__digit {
  width: 56px;
  height: 64px;
  background: var(--surface-2);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  color: transparent;
  caret-color: transparent;
  font-size: var(--text-xl);
  text-align: center;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast);
}

.pin-input__digit:hover {
  background-color: var(--surface-3);
}

.pin-input__digit:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

/* Dot indicator when digit is filled */
.pin-input__digit--filled {
  background-image: radial-gradient(circle, var(--text) 5px, transparent 5px);
  background-repeat: no-repeat;
  background-position: center;
}

.pin-input__digit--filled:focus {
  background-image: radial-gradient(circle, var(--accent) 5px, transparent 5px);
  background-repeat: no-repeat;
  background-position: center;
}

@media (max-width: 640px) {
  .pin-input__digit {
    width: 52px;
    height: 60px;
  }
}

/* ── Password strength meter ── */
.pwd-strength {
  margin-top: var(--space-sm);
}

.pwd-meter {
  height: 4px;
  background: var(--surface-3);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-sm);
}

.pwd-meter::after {
  content: '';
  display: block;
  height: 100%;
  width: var(--pwd-progress, 0%);
  border-radius: var(--radius-full);
  background: var(--danger);
  transition: width 0.3s var(--ease-spring), background 0.3s ease;
}

.pwd-meter[data-strength="medium"]::after { background: var(--warning); }
.pwd-meter[data-strength="strong"]::after { background: var(--success); }

.pwd-rules {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

.pwd-rule {
  font-size: var(--text-xs);
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s ease;
}

.pwd-rule::before {
  content: '';
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--text-faint);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.pwd-rule--pass {
  color: var(--success);
}

.pwd-rule--pass::before {
  background: var(--success);
  border-color: var(--success);
}

/* ── Light theme overrides ── */
[data-theme="light"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='m8 11-5-5h10z'/%3E%3C/svg%3E");
}