/* Components: Buttons, Cards, Badges, FAQ, Language Switch */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 44px;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--fs-sm);
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), filter var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background: linear-gradient(135deg, var(--btn-grad-start) 0%, var(--btn-grad-end) 100%);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.25);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: left 0.6s ease;
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--tx-primary);
  border-color: var(--control-border);
}

/* Text Link Button */
.btn-text,
.btn-ghost {
  background: transparent;
  color: var(--link);
  padding-left: var(--sp-2);
  padding-right: var(--sp-2);
}

/* Loading State on Buttons */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::before {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: var(--radius-full);
  animation: btn-spin 0.7s linear infinite;
}

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

/* Cards */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-normal) var(--ease-standard),
              border-color var(--duration-normal) var(--ease-standard),
              box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  border-color: rgba(14, 165, 233, 0.4);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(6, 182, 212, 0.08);
}

/* Badges & Chips */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-green {
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}

.badge-amber {
  background: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

/* FAQ Item: Visible text, no hidden accordions */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

@media (min-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.faq-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
}

.faq-question {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--tx-primary);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
}

.faq-answer {
  color: var(--tx-secondary);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
}

/* Language Switch Component */
.lang-switch-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  background: transparent;
  border: none;
  color: var(--link);
  font-size: var(--fs-xs);
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 36px;
  transition: color var(--transition), background-color var(--transition);
  text-decoration: none;
}

.lang-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--tx-primary);
  box-shadow: var(--shadow-sm);
}

/* Pause Motion Toggle */
.motion-toggle {
  background: transparent;
  border: 1px solid var(--control-border);
  color: var(--link);
  font-size: var(--fs-xs);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 44px;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}