/* ============================================
   DENTAVIZION — Reusable Component Styles
   Buttons, cards, badges, nav, etc.
   ============================================ */

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-xl);
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 10%, transparent 10%);
  background-position: center;
  background-size: 0%;
  background-repeat: no-repeat;
  transition: background-size 0.5s ease;
}

.btn:active::after {
  background-size: 300%;
  transition: background-size 0s;
}

.btn-primary {
  background: var(--color-primary-gradient);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(43, 170, 142, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-accent {
  background: var(--color-accent-gradient);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-accent);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(244, 132, 95, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-50);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.btn-lg {
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2xs) var(--space-md);
  font-size: var(--text-sm);
}

.btn-block {
  width: 100%;
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  transform: translateY(-4px);
}

.card-interactive:active {
  transform: translateY(-2px);
}

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: var(--space-2xs) var(--space-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.badge-accent {
  background: var(--color-accent-50);
  color: var(--color-accent);
}

.badge-success {
  background: #E8F5E9;
  color: var(--color-success);
}

/* ── Bottom Navigation ── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-bg-secondary);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: var(--z-sticky);
  padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.04);
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2xs) var(--space-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast);
  border-radius: var(--radius-md);
  min-width: 60px;
  text-decoration: none;
}

.bottom-nav__item--active {
  color: var(--color-primary);
}

.bottom-nav__item:hover {
  color: var(--color-primary);
}

.bottom-nav__icon {
  width: 24px;
  height: 24px;
}

/* ── Progress Bar ── */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-primary-50);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* ── Toast / Notification ── */
.toast {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--space-md));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  z-index: var(--z-toast);
  opacity: 0;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.toast--visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ── Icon Container ── */
.icon-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  flex-shrink: 0;
}

.icon-circle--primary {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.icon-circle--accent {
  background: var(--color-accent-50);
  color: var(--color-accent);
}

/* ── Loading Spinner ── */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-primary-50);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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