/* ========================================
   HEADER / NAVIGATION
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-fixed);
  transition: background-color var(--transition-base),
              backdrop-filter var(--transition-base),
              box-shadow var(--transition-base);
}

.header--transparent {
  background-color: transparent;
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-white);
  transition: color var(--transition-fast);
}

.header--scrolled .header__logo {
  color: var(--color-gray-900);
}

.header__logo-icon {
  width: 36px;
  height: 36px;
}

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

.header__nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.header--scrolled .header__nav-link {
  color: var(--color-gray-600);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.header--scrolled .header__nav-link:hover,
.header--scrolled .header__nav-link--active {
  color: var(--color-accent);
  background-color: rgba(37, 99, 235, 0.06);
}

/* Mobile menu toggle */
.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.header__menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.header--scrolled .header__menu-toggle span {
  background-color: var(--color-gray-800);
}

.header__menu-toggle--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.header__menu-toggle--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  padding: var(--space-3) var(--space-6);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
  color: var(--color-accent);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-primary);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  transform: scale(1.05);
  transition: transform 8s ease-out;
}

.hero--loaded .hero__bg {
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 22, 40, 0.4) 0%,
    rgba(10, 22, 40, 0.7) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: var(--space-8);
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, var(--text-7xl));
  font-weight: var(--font-bold);
  color: var(--color-white);
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  opacity: 0;
  transform: translateY(30px);
  animation: heroReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

.hero__subtitle {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-light);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-10);
  opacity: 0;
  transform: translateY(30px);
  animation: heroReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
}

.hero__cta {
  opacity: 0;
  transform: translateY(30px);
  animation: heroReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.7s forwards;
}

@keyframes heroReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  animation: scrollBounce 2s infinite;
}

.hero__scroll-indicator svg {
  width: 20px;
  height: 20px;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn--outline {
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  color: var(--color-white);
}

.btn--outline:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.btn--dark {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

.btn--dark:hover {
  background-color: var(--color-gray-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--ghost {
  color: var(--color-accent);
  padding: var(--space-2) 0;
}

.btn--ghost:hover {
  color: var(--color-accent-hover);
}

.btn--ghost svg {
  transition: transform var(--transition-fast);
}

.btn--ghost:hover svg {
  transform: translateX(4px);
}

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

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: var(--space-24) 0;
}

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

.section--dark {
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

.section__overline {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
}

.section--dark .section__title {
  color: var(--color-white);
}

.section__description {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  max-width: 640px;
  margin: 0 auto;
}

.section--dark .section__description {
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   FEATURE CARDS
   ======================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.feature-card {
  padding: var(--space-10) var(--space-8);
  border-radius: var(--radius-2xl);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--color-white);
}

.feature-card__icon svg {
  width: 24px;
  height: 24px;
}

.feature-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

.feature-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* ========================================
   PRODUCT CARDS
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.product-card {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background-color: var(--color-gray-50);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image {
  transform: scale(1.03);
}

.product-card__image-placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 50%, var(--color-gray-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: var(--text-4xl);
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image-placeholder {
  transform: scale(1.03);
}

.product-card__content {
  padding: var(--space-8);
}

.product-card__category {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.product-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

.product-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}

.product-card:hover .product-card__link {
  gap: var(--space-3);
}

/* ========================================
   STATS
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.stat-item {
  text-align: center;
}

.stat-item__value {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-item__label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  font-weight: var(--font-medium);
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
  text-align: center;
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.cta-section__title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.cta-section__text {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-10);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section__buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-500);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
  color: var(--color-gray-500);
}

.footer__contact-item svg {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  flex-shrink: 0;
  color: var(--color-gray-500);
}

.footer__bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.footer__social-link:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
}

/* ========================================
   PAGE HERO (inner pages)
   ======================================== */
.page-hero {
  padding: calc(72px + var(--space-20)) 0 var(--space-20);
  background-color: var(--color-primary);
  text-align: center;
}

.page-hero__title {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.page-hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.65);
  max-width: 560px;
  margin: 0 auto;
}

/* ========================================
   CONTACT FORM
   ======================================== */
.form-group {
  margin-bottom: var(--space-6);
}

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

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-base);
  font-family: inherit;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  color: var(--color-gray-800);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }

  .header__menu-toggle {
    display: flex;
  }

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

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

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

  .cta-section__buttons {
    flex-direction: column;
    align-items: center;
  }

  .section {
    padding: var(--space-16) 0;
  }
}

@media (max-width: 480px) {
  .stat-item__value {
    font-size: var(--text-4xl);
  }
}