/* ============================================
   Component Library - ReceiptIQ
   Reusable UI components
   ============================================ */

/* ----------------------------------------
   Buttons
   ---------------------------------------- */

/* Base button reset and shared styles */
.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-family-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 4px var(--color-accent-primary);
}

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

/* Shine effect on hover */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255, 255, 255, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

/* Primary button - Gradient with glow */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

/* Secondary button - Outlined */
.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-prominent);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
}

/* Ghost button - Minimal */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-4);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-primary);
}

.btn-ghost::before {
  display: none;
}

/* Success button */
.btn-success {
  background: var(--color-accent-success);
  color: white;
}

.btn-success:hover {
  background: #16a34a;
  transform: translateY(-2px);
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
}

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

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

/* Full width button */
.btn-full {
  width: 100%;
}

/* Icon only button */
.btn-icon {
  padding: var(--space-3);
  width: 40px;
  height: 40px;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
  padding: var(--space-2);
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
  padding: var(--space-3);
}

/* ----------------------------------------
   Cards
   ---------------------------------------- */

/* Base card */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  transition: all var(--transition-base);
}

/* Card shine effect on hover */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-card-shine);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover {
  border-color: var(--color-border-default);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.card:hover::before {
  opacity: 1;
}

/* Card variants */
.card-elevated {
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-lg);
}

.card-flat {
  background: var(--color-bg-tertiary);
  border: none;
}

.card-flat:hover {
  box-shadow: none;
  transform: none;
  background: var(--color-bg-elevated);
}

.card-bordered {
  border-width: 2px;
}

.card-featured {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 1px var(--color-accent-primary), var(--shadow-glow);
}

.card-featured:hover {
  box-shadow: 0 0 0 1px var(--color-accent-primary), var(--shadow-glow-lg), var(--shadow-xl);
}

/* Card sizes */
.card-compact {
  padding: var(--space-6);
}

.card-spacious {
  padding: var(--space-12);
}

/* Card without hover effects */
.card-static {
  cursor: default;
}

.card-static:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--color-border-subtle);
}

.card-static:hover::before {
  opacity: 0;
}

/* Card header */
.card-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
}

/* Card footer */
.card-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

/* ----------------------------------------
   Badges
   ---------------------------------------- */

.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(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  line-height: 1.5;
}

.badge-primary {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-secondary {
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-accent-secondary);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-accent-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-accent-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-accent-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-gradient {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

.badge-outline {
  background: transparent;
  border: 1px solid var(--color-border-prominent);
  color: var(--color-text-secondary);
}

/* Badge with pulse animation */
.badge-new {
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Larger badge variant */
.badge-lg {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* ----------------------------------------
   Feature Icons
   ---------------------------------------- */

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
  color: var(--color-accent-primary);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.card:hover .feature-icon {
  transform: scale(1.1);
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

/* Feature icon sizes */
.feature-icon-sm {
  width: 2.5rem;
  height: 2.5rem;
  font-size: var(--text-lg);
}

.feature-icon-lg {
  width: 4rem;
  height: 4rem;
  font-size: var(--text-2xl);
}

/* ----------------------------------------
   Section Titles
   ---------------------------------------- */

.section-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 600px;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ----------------------------------------
   Dividers
   ---------------------------------------- */

.divider {
  height: 1px;
  background: var(--color-border-subtle);
  border: none;
  margin: var(--space-8) 0;
}

.divider-prominent {
  background: var(--color-border-default);
}

/* ----------------------------------------
   Lists
   ---------------------------------------- */

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: var(--line-height-relaxed);
}

.feature-list li i {
  color: var(--color-accent-success);
  font-size: var(--text-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ----------------------------------------
   Price Display
   ---------------------------------------- */

.price {
  font-size: var(--text-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
}

.price-currency {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-semibold);
  vertical-align: top;
}

.price-period {
  font-size: var(--text-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
}

/* ----------------------------------------
   Form Elements
   ---------------------------------------- */

.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: var(--font-family-sans);
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

/* Select dropdown */
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 16px;
  padding-right: var(--space-10);
  cursor: pointer;
}

/* ----------------------------------------
   Language Selector
   ---------------------------------------- */

.language-selector {
  position: relative;
}

.language-selector select {
  appearance: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
  background-size: 14px;
}

.language-selector select:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-border-default);
}

.language-selector select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
}

.language-selector select option {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

/* ----------------------------------------
   App Store Button
   ---------------------------------------- */

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-subtle);
}

.app-store-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.app-store-btn i {
  font-size: var(--text-2xl);
}

/* ----------------------------------------
   Links
   ---------------------------------------- */

.link {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.link:hover {
  color: var(--color-accent-secondary);
  text-decoration: underline;
}

.link-muted {
  color: var(--color-text-secondary);
}

.link-muted:hover {
  color: var(--color-text-primary);
}

/* ----------------------------------------
   Tooltip
   ---------------------------------------- */

.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-default);
  z-index: var(--z-tooltip, 1000);
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-4px);
}

/* ----------------------------------------
   Tabs
   ---------------------------------------- */

.tabs {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-1);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  width: fit-content;
}

.tab {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--color-text-primary);
}

.tab.active {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* ----------------------------------------
   Accordion / FAQ
   ---------------------------------------- */

.accordion-item {
  border-bottom: 1px solid var(--color-border-subtle);
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) 0;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-medium);
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.accordion-trigger:hover {
  color: var(--color-accent-primary);
}

.accordion-trigger i {
  font-size: var(--text-sm);
  transition: transform var(--transition-base);
}

.accordion-item.open .accordion-trigger i {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion-item.open .accordion-content {
  max-height: 500px;
}

.accordion-body {
  padding-bottom: var(--space-5);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ----------------------------------------
   Alert / Callout Boxes
   ---------------------------------------- */

.callout {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid;
}

.callout-info {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
}

.callout-success {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
}

.callout-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
}

.callout-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
}

/* ----------------------------------------
   Avatar
   ---------------------------------------- */

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-lg { width: 56px; height: 56px; font-size: var(--text-lg); }
.avatar-xl { width: 80px; height: 80px; font-size: var(--text-xl); }

/* ----------------------------------------
   QR Code Container
   ---------------------------------------- */

.qr-container {
  background: white;
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  display: inline-block;
  box-shadow: var(--shadow-lg);
}

.qr-container img {
  display: block;
  width: 120px;
  height: 120px;
}

.qr-container-sm img {
  width: 100px;
  height: 100px;
}

.qr-container-lg img {
  width: 160px;
  height: 160px;
}