/* ============================================
   TAOQIMIAO — Components
   Buttons, Cards, Navigation, Footer, Forms
   ============================================ */

/* ============================================
   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-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  line-height: 1;
  white-space: nowrap;
  min-height: 48px;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.3);
}

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

.btn--secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-gray-800);
  border-color: var(--color-accent);
}

.btn--accent:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--color-accent-rgb), 0.3);
}

.btn--white {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--white:hover {
  background-color: transparent;
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.3);
}

.btn--ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-2px);
}

.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
  min-height: 56px;
}

.btn--sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  min-height: 36px;
}

.btn--full {
  width: 100%;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ============================================
   NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: rgba(250, 250, 247, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: all var(--transition-base);
  height: var(--header-height);
}

.header--scrolled {
  background: rgba(250, 250, 247, 0.98);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  z-index: calc(var(--z-header) + 1);
}

.header__logo-icon {
  width: 40px;
  height: 40px;
}

.header__logo span {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: var(--font-regular);
  color: var(--color-text-light);
  display: block;
  letter-spacing: var(--tracking-wide);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.header__nav a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-base) var(--ease-out-expo);
  transform: translateX(-50%);
}

.header__nav a:hover {
  color: var(--color-primary);
}

.header__nav a:hover::after,
.header__nav a.active::after {
  width: 60%;
}

.header__nav a.active {
  color: var(--color-primary);
}

.header__cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: calc(var(--z-header) + 1);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(5px) translateX(5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-5px) translateX(5px);
}

/* Mobile Navigation */
@media (max-width: 1024px) {
  .menu-toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-2);
    transition: transform var(--transition-slow) var(--ease-out-expo);
    padding: var(--space-8);
    transform: translateX(100%);
  }

  .header__nav.open {
    transform: translateX(0);
  }

  .header__nav a {
    font-size: var(--text-2xl);
    font-family: var(--font-heading);
    padding: var(--space-3) 0;
  }

  .header__cta {
    display: none;
  }

  .header__nav .mobile-cta {
    display: flex;
    margin-top: var(--space-6);
  }
}

@media (min-width: 1025px) {
  .header__nav .mobile-cta {
    display: none;
  }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__brand {
  padding-right: var(--space-8);
}

.footer__brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer__brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-400);
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.06);
  color: var(--color-gray-400);
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.footer__social a svg {
  width: 18px;
  height: 18px;
}

.footer__column h4 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.footer__column ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__column a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__column a:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

.footer__newsletter {
  margin-top: var(--space-6);
}

.footer__newsletter-form {
  display: flex;
  gap: var(--space-2);
}

.footer__newsletter-form input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.footer__newsletter-form input::placeholder {
  color: var(--color-gray-500);
}

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

.footer__newsletter-form button {
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.footer__newsletter-form button:hover {
  background: var(--color-primary-light);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) 0;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer__bottom-links a {
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
  color: var(--color-accent);
}

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

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

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer__newsletter-form {
    flex-direction: column;
  }
}

/* ============================================
   PRODUCT CARDS
   ============================================ */
.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base) var(--ease-out-expo);
  border: 1px solid rgba(0,0,0,0.04);
  position: relative;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.product-card__badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-sm);
  z-index: 2;
}

.product-card__badge--sale {
  background: var(--color-error);
}

.product-card__badge--new {
  background: var(--color-accent-dark);
  color: var(--color-white);
}

.product-card__image {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-gray-100);
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image img {
  transform: scale(1.05);
}

.product-card__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4);
  background: linear-gradient(transparent, rgba(0,0,0,0.3));
  display: flex;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.product-card:hover .product-card__overlay {
  opacity: 1;
  transform: translateY(0);
}

.product-card__content {
  padding: var(--space-5);
}

.product-card__category {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-accent-dark);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.product-card__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-800);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
}

.product-card__name a {
  transition: color var(--transition-fast);
}

.product-card__name a:hover {
  color: var(--color-primary);
}

.product-card__price {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.product-card__price-current {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.product-card__price-original {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: line-through;
}

.product-card__rating {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.product-card__stars {
  display: flex;
  gap: 1px;
  color: var(--color-accent);
}

.product-card__stars svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   FEATURE CARDS (Glassmorphism)
   ============================================ */
.feature-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.9);
}

.feature-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-primary-100));
  border-radius: var(--radius-lg);
  color: var(--color-primary);
}

.feature-card__icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h4 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
}

/* ============================================
   TESTIMONIAL CARDS
   ============================================ */
.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  border: 1px solid rgba(0,0,0,0.04);
  transition: all var(--transition-base);
}

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

.testimonial-card__quote {
  font-size: var(--text-5xl);
  font-family: var(--font-heading);
  color: var(--color-primary-100);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.testimonial-card__text {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-accent-50));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  color: var(--color-primary);
  font-size: var(--text-lg);
}

.testimonial-card__name {
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--color-gray-800);
}

.testimonial-card__location {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.testimonial-card__stars {
  display: flex;
  gap: 2px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.testimonial-card__stars svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   STAT CARD
   ============================================ */
.stat-card {
  text-align: center;
  padding: var(--space-6);
}

.stat-card__number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
  line-height: 1;
}

.stat-card__label {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-gray-300);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: all var(--transition-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.form-control::placeholder {
  color: var(--color-gray-400);
}

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

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B6B6B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

/* ============================================
   TABS / FILTER BAR
   ============================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-500);
  background: transparent;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ============================================
   ACCORDION (FAQ)
   ============================================ */
.accordion {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__item {
  border-bottom: 1px solid var(--color-gray-200);
}

.accordion__item:last-child {
  border-bottom: none;
}

.accordion__header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  background: var(--color-white);
  cursor: pointer;
  font-weight: var(--font-medium);
  font-size: var(--text-base);
  text-align: left;
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.accordion__header:hover {
  background: var(--color-gray-50);
}

.accordion__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
  flex-shrink: 0;
  color: var(--color-gray-400);
}

.accordion__item.active .accordion__icon {
  transform: rotate(180deg);
}

.accordion__item.active .accordion__header {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.accordion__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base) var(--ease-out-expo);
}

.accordion__content {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
}

/* ============================================
   TIMELINE
   ============================================ */
.timeline {
  position: relative;
  padding: var(--space-8) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary-100), var(--color-accent-100));
  transform: translateX(-50%);
}

.timeline__item {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-10);
  position: relative;
}

.timeline__item:nth-child(odd) {
  flex-direction: row;
  padding-right: calc(50% + var(--space-8));
}

.timeline__item:nth-child(even) {
  flex-direction: row-reverse;
  padding-left: calc(50% + var(--space-8));
}

.timeline__dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  border: 3px solid var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: 1;
}

.timeline__content {
  background: var(--color-white);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.timeline__year {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
}

.timeline__content h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.timeline__content p {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .timeline::before {
    left: var(--space-6);
  }

  .timeline__item:nth-child(odd),
  .timeline__item:nth-child(even) {
    flex-direction: row;
    padding-left: calc(var(--space-6) + var(--space-8));
    padding-right: 0;
  }

  .timeline__dot {
    left: var(--space-6);
  }
}

/* ============================================
   TRUST BADGES
   ============================================ */
.trust-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding: var(--space-6) 0;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.trust-badge svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.trust-badge strong {
  color: var(--color-gray-700);
}