/* ========================================
   NAVIGATION
   ======================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color var(--transition-base);
}

.site-header.scrolled {
  background: var(--gradient-hero);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  color: var(--color-white);
}

.nav__logo {
  display: flex;
  align-items: center;
  z-index: 10;
}

.nav__logo img {
  height: 40px;
  width: auto;
}

.nav__links {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 32px;
  margin-inline-start: auto;
  font-size: 1rem;
  font-weight: 500;
}

.nav__links a:hover {
  opacity: 0.8;
}

.nav__cta {
  margin-inline-start: 32px;
  padding: 0.5rem 1.5rem;
  border: 1.5px solid var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav__cta:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   HERO
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  color: var(--color-white);
  text-align: center;
  padding-block-start: 72px;
  overflow: hidden;
}

.hero__content {
  max-width: 808px;
  padding-block: var(--space-4xl);
}

.hero__content h1 {
  font-family: var(--font-family-heading);
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.16;
  color: var(--color-white);
  margin-block-end: var(--space-lg);
}

.hero__content h1 strong {
  font-weight: 700;
}

.hero__content p {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.5;
  color: var(--color-hero-subtitle);
  margin-block-end: var(--space-2xl);
  max-width: 722px;
  margin-inline: auto;
}

.hero__wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 120px;
  pointer-events: none;
}

/* ========================================
   ABOUT
   ======================================== */

.about {
  padding-block: var(--space-5xl) var(--space-4xl);
}

.about .container {
  padding-inline: 0;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about__content h2 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 400;
  line-height: 1.3;
  text-align: left;
}

.about__content p {
  color: var(--color-text-secondary);
}

.about__visual {
  display: flex;
  justify-content: center;
}

.about__arrows {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 26px;
  overflow: hidden;
}

/* ========================================
   HOW WE WORK
   ======================================== */

.how-we-work {
  padding-block: var(--space-3xl) var(--space-5xl);
  background: var(--color-bg-warm);
  border-radius: 50%;
  margin-inline: -10%;
  padding-inline: 10%;
}

.how-we-work__frame {
  padding-block: var(--space-5xl);
  padding-inline: 0;
  text-align: center;
}

.how-we-work h2 {
  margin-block-end: var(--space-md);
}

.how-we-work__subtitle {
  color: var(--color-text-secondary);
  max-width: 820px;
  margin-inline: auto;
  margin-block-end: var(--space-3xl);
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  max-width: 1100px;
  margin-inline: auto;
}

.card {
  position: relative;
  perspective: 800px;
  height: 280px;
  flex: 1 0 0;
  cursor: pointer;
  transform-style: preserve-3d;
}

.card__front,
.card__back {
  border-radius: var(--radius-card);
  padding: 32px;
  text-align: center;
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  backface-visibility: hidden;
  transition: transform 0.6s ease;
}

.card__front {
  background: var(--color-bg-card);
  transform: rotateY(0deg);
}

.card__back {
  background: var(--color-primary);
  transform: rotateY(-180deg);
}

.card.flipped .card__front {
  transform: rotateY(180deg);
}

.card.flipped .card__back {
  transform: rotateY(0deg);
}

@media (hover: hover) {
  .card:hover .card__front {
    transform: rotateY(180deg);
  }

  .card:hover .card__back {
    transform: rotateY(0deg);
  }
}

.card--accent .card__front {
  background: var(--gradient-primary);
  color: var(--color-white);
}

.card--accent .card__back {
  background: var(--gradient-primary);
  color: var(--color-white);
}

.card--accent h3 {
  color: var(--color-white);
}

.card__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-block-end: var(--space-lg);
  background: var(--color-bg-warm-light);
  color: var(--color-primary);
}

.card--accent .card__icon {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

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

.card h3 {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 1.75rem;
  line-height: 2rem;
  letter-spacing: 0;
  text-align: center;
  margin-block-end: 0;
}

.card .card__back p {
  width: 100%;
  font-size: 1rem;
  line-height: 1.6;
  padding: 0;
  color: #fff !important;
}

/* ========================================
   PARTNERS
   ======================================== */

.partners {
  padding-block: var(--space-4xl);
  background: #fff;
}

.partners__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.partners__content h2 {
  margin-block-end: var(--space-md);
}

.partners__content > p {
  color: var(--color-text-secondary);
  max-width: 448px;
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 18px;
  line-height: 28px;
  letter-spacing: 0px;
  margin-block-end: var(--space-xl);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.checklist li {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 18px;
  line-height: 28px;
  letter-spacing: 0px;
  vertical-align: middle;
}

.checklist li svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.partners__visual {
  display: flex;
  justify-content: center;
}

.partners__visual img {
  max-width: 100%;
  height: auto;
}

/* ========================================
   CTA BANNER
   ======================================== */

.cta-banner {
  padding-block: 115px;
  background: var(--gradient-hero);
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 50% 50% / 0 0 80px 80px;
}

.cta-banner .container {
  position: relative;
}

.cta-banner h2 {
  color: #fff;
  text-align: center;
  font-family: var(--font-family-heading);
  font-weight: 400;
  font-size: 64px;
  line-height: 74px;
  letter-spacing: 0px;
  max-width: 676px;
  margin-inline: auto;
  margin-block-end: var(--space-md);
}

.cta-banner h2 strong {
  font-weight: 600;
}

.cta-banner p {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 18px;
  line-height: 150%;
  letter-spacing: 0px;
  text-align: center;
  color: #fff;
  max-width: 700px;
  margin-inline: auto;
  white-space: nowrap;
}

/* ========================================
   CONTACT
   ======================================== */

.contact {
  padding-block: var(--space-5xl);
}

.contact h2 {
  text-align: center;
  margin-block-end: 18px;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-4xl);
  align-items: start;
}

.contact__form {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 32px;
  max-width: 614px;
  padding: 44px;
  background: linear-gradient(135deg, #F9FAFB, #FFF7ED);
  border-radius: var(--radius-lg);
}

.contact__form h3 {
  font-family: var(--font-family);
  font-weight: 600;
  font-size: var(--text-2xl);
}

.form-group {
  width: 100%;
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-block-end: var(--space-sm);
  color: #364153;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid #D1D5DC;
  border-radius: 1rem;
  background: #fff;
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--color-text);
  min-height: 44px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 105, 0, 0.1);
  outline: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 160px;
}

.contact__form .btn--gradient {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 1rem 2rem;
  border: none;
  border-radius: 999px;
  background: linear-gradient(90deg, #FF6900, #FB2C36);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.contact__form .btn--gradient:hover {
  opacity: 0.9;
}

.form-confirmation {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: linear-gradient(135deg, #F9FAFB, #FFF7ED);
  border-radius: var(--radius-lg);
  padding: 44px;
  min-height: 300px;
  text-align: center;
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.4;
  color: #0A0A0A;
}

.contact__form .btn--gradient svg {
  width: 20px;
  height: 20px;
}

.contact__info {
  padding-block-start: var(--space-xl);
}

.contact__info h3 {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 30px;
  line-height: 36px;
  letter-spacing: 0px;
  margin-block-end: var(--space-md);
}

.contact__info > p {
  color: #423E3B;
  line-height: 1.6;
  margin-block-end: var(--space-xl);
}

.contact__info h4 {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 20px;
  line-height: 28px;
  letter-spacing: 0px;
  margin-block-end: var(--space-sm);
}

.contact__info address {
  font-style: normal;
  color: #423E3B;
  line-height: 1.6;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background: var(--color-black);
  color: var(--color-white);
  padding-block: var(--space-4xl) 115px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  max-width: 1106px;
  row-gap: 48px;
  column-gap: 48px;
  margin-inline: auto;
  justify-items: start;
  text-align: left;
}

.footer__col h4 {
  color: var(--color-white);
  margin-block-end: var(--space-lg);
}

.footer__col li {
  margin-block-end: var(--space-sm);
}

.footer__col a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer__col address {
  font-style: normal;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

.footer__brand img {
  height: 40px;
  width: auto;
}

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

/* ========================================
   SCROLL REVEAL ANIMATIONS
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.cards .reveal:nth-child(2) { transition-delay: 0.1s; }
.cards .reveal:nth-child(3) { transition-delay: 0.2s; }
.cards .reveal:nth-child(4) { transition-delay: 0.3s; }

/* ========================================
   RESPONSIVE — Tablet
   ======================================== */

@media (max-width: 1024px) {
  .how-we-work__frame {
    padding: 0;
  }

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

@media (max-width: 768px) {
  h2,
  .section-label {
    font-size: 2rem;
    line-height: 1.3;
    text-align: center;
  }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__links.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--gradient-hero);
    align-items: center;
    justify-content: center;
    gap: var(--space-2xl);
    font-size: var(--text-2xl);
    z-index: 5;
  }

  .nav__links.is-open + .nav__cta {
    display: inline-flex;
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    font-size: 20px;
    padding: 15px 20px;
    margin: 0;
  }

  .hero__content {
    padding-block: var(--space-3xl);
  }

  .hero__content h1 {
    font-family: var(--font-family-heading);
    font-weight: 400;
    font-size: 2rem;
    line-height: 1.3;
    letter-spacing: 0;
    text-align: center;
  }

  .hero__wave {
    height: 60px;
  }

  .cta-banner {
    padding: 44px 16px;
    border-radius: 0 0 50% 50% / 0 0 40px 40px;
  }

  .cta-banner .container {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }

  .cta-banner h2 {
    font-size: 2rem;
    line-height: 1.3;
    margin-block-end: 0;
  }

  .cta-banner p {
    white-space: normal;
  }

  .about__grid,
  .partners__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about {
    padding: 44px 16px;
  }

  .partners {
    padding: 44px 16px;
  }

  .contact {
    padding: 44px 16px;
  }

  .contact .container {
    padding: 0;
  }

  .contact__form {
    border-radius: 24px;
    gap: 24px;
    padding: 24px 16px;
  }

  .contact__info {
    padding: 0;
  }

  .about__visual {
    order: 1;
  }

  .how-we-work {
    background: url('../assets/images/how-we-work-bg-mobile.svg') center / cover no-repeat;
    background-color: transparent;
    border-radius: 0;
    margin-inline: 0;
    padding-inline: 16px;
  }

  .how-we-work__frame {
    padding: 0;
  }

  .cards {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-inline: auto;
  }

  .partners__visual {
    order: 1;
  }

  .footer {
    padding: 44px 16px;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0;
  }

  .footer__col h4 {
    margin-block-end: 16px;
  }

  .footer__col a,
  .footer__col address {
    font-family: var(--font-family);
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    letter-spacing: -0.31px;
  }

  .footer__brand {
    align-items: flex-start;
  }
}