/* ==========================================================================
   Monster Airmars G10 — Components
   Buttons, Cards, Forms, Badges, Overlays
   ========================================================================== */

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 400;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: var(--gradient-cta);
  color: var(--color-text);
  border-radius: var(--radius-lg);
  padding: 16px 32px;
  font-size: 20px;
  min-height: 56px;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 40px rgba(255, 75, 31, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 12px 20px;
  font-size: 14px;
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.btn-outline:hover {
  background: rgba(255, 75, 31, 0.1);
}

.btn-full {
  width: 100%;
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: var(--space-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.card-spec {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-sm);
}

.card-spec .card-icon {
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.card-spec .card-number {
  font-family: var(--font-price);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
}

.card-spec .card-label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* ── Review Card ── */
.card-review {
  background: var(--color-bg-card);
  padding: var(--space-lg);
  border-left: 3px solid var(--color-primary);
  position: relative;
}

.card-review .quote-icon {
  position: absolute;
  right: 16px;
  top: 16px;
  font-size: 48px;
  color: rgba(255, 75, 31, 0.15);
}

.card-review .stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-sm);
}

.card-review .star {
  color: var(--color-primary);
  font-size: 16px;
}

.card-review .review-text {
  font-style: italic;
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.card-review .reviewer {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

/* ── Trust Badge ── */
.badge-trust {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-secondary);
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.badge-trust .badge-icon {
  font-size: 24px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.badge-trust .badge-text {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

/* ── Price Badge ── */
.badge-sale {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-sale-red);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 100px;
}

.price-old {
  font-family: var(--font-price);
  font-size: 20px;
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.price-new {
  font-family: var(--font-price);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

/* ── Form Elements ── */
.form-group {
  position: relative;
  margin-bottom: var(--space-lg);
}

.form-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  padding: 12px 0;
  outline: none;
  transition: border-color var(--transition-normal);
}

.form-input:focus {
  border-bottom-color: var(--color-primary);
}

.form-input::placeholder {
  color: transparent;
}

.form-label {
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text-muted);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
  top: -16px;
  font-size: 12px;
  color: var(--color-primary);
}

.form-textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  padding: 12px 0;
  outline: none;
  resize: vertical;
  min-height: 60px;
  transition: border-color var(--transition-normal);
}

.form-textarea:focus {
  border-bottom-color: var(--color-primary);
}

/* ── Quantity Selector ── */
.qty-selector {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.qty-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--color-text);
  font-size: 20px;
  cursor: pointer;
  transition: background var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.qty-btn:active {
  background: rgba(255, 75, 31, 0.2);
}

.qty-value {
  font-family: var(--font-price);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  min-width: 24px;
  text-align: center;
}

/* ── Countdown Timer ── */
.countdown-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.countdown-value {
  background: var(--color-border);
  width: 64px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  border-bottom: 4px solid var(--color-primary);
  font-family: var(--font-price);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-text);
}

.countdown-label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ── FAQ Accordion ── */
.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.faq-item[open] .faq-summary {
  background: rgba(255, 75, 31, 0.08);
}

.faq-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-text);
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary .faq-icon {
  color: var(--color-primary);
  font-size: 24px;
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.6;
}

/* ── Grain Overlay ── */
.grain-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px 128px;
}

/* ── Video Play Button ── */
.video-play-btn {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-glow);
}

.video-play-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 50px rgba(255, 75, 31, 0.5);
}

.video-play-btn:active {
  transform: scale(0.95);
}

.video-play-btn svg {
  width: 32px;
  height: 32px;
  fill: white;
  margin-left: 4px;
}

/* ── Order Summary ── */
.order-summary {
  background: var(--color-bg);
  padding: var(--space-lg);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin-bottom: var(--space-lg);
}

.order-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
}

.order-row-total {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  margin-top: var(--space-sm);
}

.order-total-label {
  font-family: var(--font-heading);
  font-size: 24px;
}

.order-total-value {
  font-family: var(--font-price);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
}

/* ── Scrollbar hide ── */
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}

/* ── Purchase Notification Popup ── */
.purchase-popup {
  position: fixed;
  bottom: 90px;
  left: 20px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid rgba(0, 102, 204, 0.15);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 380px;
  width: calc(100% - 40px);
  transform: translateY(150px);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.5s ease;
  pointer-events: none;
}

.purchase-popup.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.purchase-popup-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--color-border-subtle);
  background: #ffffff;
}

.purchase-popup-content {
  flex: 1;
}

.purchase-popup-text {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-text);
  margin: 0;
}

.purchase-popup-text strong {
  color: var(--color-primary);
}

.purchase-popup-close {
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color var(--transition-fast);
}

.purchase-popup-close:hover {
  color: var(--color-text);
}

@media (max-width: 576px) {
  .purchase-popup {
    bottom: 85px;
    left: 15px;
    width: calc(100% - 30px);
  }
}

/* ── Free Shipping Highlight ── */
.highlight-delivery {
  background: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.25);
  color: #16A34A; /* màu xanh lá cây đậm nổi bật cho miễn phí giao hàng */
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-shadow: none;
}

/* Biến thể highlight màu xanh dương băng giá */
.highlight-delivery--blue {
  background: rgba(0, 102, 204, 0.08);
  border: 1px solid rgba(0, 102, 204, 0.2);
  color: var(--color-primary);
}

/* ── Cooling & Airflow Simulator ── */
.cooling-simulator {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 102, 204, 0.04);
  border: 1px solid rgba(0, 102, 204, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) auto;
  max-width: 480px;
  position: relative;
  overflow: hidden;
}

.temp-readout {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-md);
  z-index: 2;
}

.temp-label {
  font-family: var(--font-body);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.temp-value {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 2px;
}

.temp-number {
  display: inline-block;
  animation: tempPulse 2s infinite ease-in-out;
}

.temp-status {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-success);
  font-weight: 700;
  margin-top: 4px;
}

.airflow-wave-container {
  width: 100%;
  max-width: 320px;
  height: 60px;
  z-index: 1;
}

.airflow-svg {
  width: 100%;
  height: 100%;
}

.airflow-line {
  stroke-dasharray: 40, 120;
  stroke-dashoffset: 0;
  animation: airflowMove 1.8s infinite linear;
}

.airflow-line-1 {
  animation-duration: 1.2s;
}

.airflow-line-2 {
  animation-duration: 1.8s;
  animation-delay: -0.4s;
}

.airflow-line-3 {
  animation-duration: 2.4s;
  animation-delay: -0.8s;
}

.cooling-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  font-size: 14px;
  opacity: 0;
  animation: particleFloat 3s infinite ease-in-out;
}

.particle-1 {
  left: 15%;
  top: 60%;
  animation-delay: 0s;
  animation-duration: 2.5s;
}

.particle-2 {
  left: 45%;
  top: 70%;
  animation-delay: 0.8s;
  animation-duration: 3.2s;
}

.particle-3 {
  left: 75%;
  top: 55%;
  animation-delay: 1.5s;
  animation-duration: 2.8s;
}

/* Keyframes */
@keyframes tempPulse {
  0%, 100% {
    transform: scale(1);
    color: var(--color-primary);
  }
  50% {
    transform: scale(1.05);
    color: var(--color-primary-light);
  }
}

@keyframes airflowMove {
  0% {
    stroke-dashoffset: 160;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes particleFloat {
  0% {
    transform: translateY(20px) scale(0.6);
    opacity: 0;
  }
  50% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-30px) scale(1.1);
    opacity: 0;
  }
}