/* ============================================
   VEENAPEETH ACADEMY — UI COMPONENTS
   Buttons, Cards, Badges, Forms, Accordion, etc.
   ============================================ */

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  transform: translateX(-100%);
  transition: transform var(--duration-slow) var(--ease-default);
}

.btn:hover::before {
  transform: translateX(0);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.35);
}

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

.btn-secondary:hover {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

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

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(245, 158, 11, 0.35);
}

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

.btn-ghost:hover {
  background: var(--color-surface);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-white {
  background: white;
  color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-body-lg);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-body-sm);
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-lg);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-default);
  border: 1px solid var(--color-border-light);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.card-body {
  padding: var(--space-6);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-default);
}

.card-glass:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  letter-spacing: var(--tracking-wide);
}

.badge-blue {
  background: var(--color-secondary-100);
  color: var(--color-secondary-dark);
}

.badge-accent {
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-accent-dark);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.badge-gold {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: white;
  padding: var(--space-1) var(--space-4);
}

/* ============================================
   STAT COUNTER
   ============================================ */

.stat-card {
  text-align: center;
  padding: var(--space-6);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--weight-extrabold);
  color: var(--color-secondary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-body-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* ============================================
   ACCORDION
   ============================================ */

.accordion-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  overflow: hidden;
  background: var(--color-surface);
  transition: all var(--duration-normal) var(--ease-default);
}

.accordion-item:hover {
  border-color: var(--color-secondary-200);
}

.accordion-item.active {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  font-weight: var(--weight-semibold);
  font-size: var(--text-body-lg);
  gap: var(--space-4);
  user-select: none;
}

.accordion-header:hover {
  color: var(--color-secondary);
}

.accordion-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform var(--duration-normal) var(--ease-default);
  color: var(--color-secondary);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

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

.accordion-content-inner {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
  position: relative;
  margin-bottom: var(--space-5);
}

.form-input {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-body);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text);
  transition: all var(--duration-normal) var(--ease-default);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.form-label {
  display: block;
  font-size: var(--text-body-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-error {
  font-size: var(--text-caption);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}

.form-group.has-error .form-error {
  display: block;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%234B5563' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: var(--space-12);
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   STAR RATING
   ============================================ */

.stars {
  display: flex;
  gap: var(--space-1);
  color: var(--color-accent);
}

.stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ============================================
   TABS
   ============================================ */

.tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
  white-space: nowrap;
}

.tab-btn:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.tab-btn.active {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
}

/* ============================================
   CAROUSEL
   ============================================ */

.carousel-wrapper {
  position: relative;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  gap: var(--space-6);
  transition: transform var(--duration-slow) var(--ease-default);
}

.carousel-slide {
  flex: 0 0 100%;
  min-width: 0;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
}

.carousel-dot.active {
  background: var(--color-secondary);
  width: 32px;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: var(--z-base);
  border: 1px solid var(--color-border-light);
  transition: all var(--duration-normal) var(--ease-default);
  color: var(--color-text);
}

.carousel-arrow:hover {
  background: var(--color-secondary);
  color: white;
  box-shadow: var(--shadow-blue);
}

.carousel-arrow--prev { left: -24px; }
.carousel-arrow--next { right: -24px; }

/* ============================================
   LIGHTBOX
   ============================================ */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-default);
  padding: var(--space-8);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  font-size: 24px;
  transition: all var(--duration-normal) var(--ease-default);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
  transform: rotate(90deg);
}

/* ============================================
   WHATSAPP FLOATING BUTTON
   ============================================ */

.whatsapp-float {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 24px rgba(37, 211, 102, 0.4);
  z-index: var(--z-sticky);
  transition: all var(--duration-normal) var(--ease-default);
  animation: pulse-green 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 32px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 4px 24px rgba(37, 211, 102, 0.4); }
  50% { box-shadow: 0 4px 40px rgba(37, 211, 102, 0.6); }
}

/* ============================================
   SCROLL TO TOP
   ============================================ */

.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: calc(var(--space-8) + 72px);
  width: 48px;
  height: 48px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-default);
  cursor: pointer;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
  color: var(--color-text);
  background: transparent;
  border: none;
}

.theme-toggle:hover {
  background: var(--color-bg-alt);
  color: var(--color-secondary);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }