:root {
  --color-red: #C74634;
  --color-red-dark: #a33a2b;
  --color-slate-150: #3C4545;
  --color-slate-100: #697778;
  --color-slate-50: #C2D4D4;
  --color-neutral-30: #F1EFED;
  --color-white: #ffffff;
  --color-yellow: #F1B13F;

  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;

  --radius: 0.5rem;
  --shadow: 0 4px 24px rgba(60, 69, 69, 0.08);
  --shadow-hover: 0 8px 32px rgba(60, 69, 69, 0.12);
  --transition: all 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-slate-150);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}

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

.btn--primary:hover {
  background: var(--color-red-dark);
  border-color: var(--color-red-dark);
}

.btn--secondary {
  background: transparent;
  color: var(--color-slate-150);
  border-color: var(--color-slate-150);
}

.btn--secondary:hover {
  background: var(--color-slate-150);
  color: var(--color-white);
}

.btn--large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(60, 69, 69, 0.06);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
}

.logo__oracle {
  color: var(--color-red);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo__divider {
  width: 1px;
  height: 1.1rem;
  background: var(--color-slate-100);
  opacity: 0.5;
}

.logo__product {
  color: var(--color-slate-150);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.nav {
  position: fixed;
  top: 4rem;
  left: 0;
  right: 0;
  height: calc(100dvh - 4rem);
  z-index: 1001;
  background: rgba(255, 255, 255, 0.98);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  padding: 1.5rem 1.25rem;
  overflow-y: auto;
}

.nav.is-open {
  transform: translateX(0);
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav__list a {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-slate-150);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-neutral-30);
}

.nav__list a:hover {
  color: var(--color-red);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch {
  background: transparent;
  border: 1px solid var(--color-slate-50);
  color: var(--color-slate-150);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.lang-switch:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  background: transparent;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-slate-150);
  border-radius: 2px;
  transition: var(--transition);
}

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

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

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

/* Hero */
.hero {
  padding-top: 7rem;
  padding-bottom: 4rem;
  background: linear-gradient(180deg, var(--color-neutral-30) 0%, var(--color-white) 100%);
}

.hero__inner {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-slate-150);
}

.hero__subtitle {
  margin-top: 1rem;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-slate-100);
  max-width: 52ch;
}

.hero__cta {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

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

.hero__illustration {
  width: 100%;
  max-width: 320px;
  height: auto;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section--light {
  background: var(--color-neutral-30);
}

.section--cta {
  background: var(--color-slate-150);
  color: var(--color-white);
  text-align: center;
}

.section__header {
  max-width: 720px;
  margin-bottom: 2.5rem;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-red);
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section__lead {
  margin-top: 0.75rem;
  font-size: 1.05rem;
  color: var(--color-slate-100);
}

.section--cta .section__lead,
.section--cta .section__title {
  color: var(--color-white);
}

/* Cards */
.cards {
  display: grid;
  gap: 1.25rem;
}

.card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.card__icon {
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1rem;
}

.card__icon--large {
  width: 3.25rem;
  height: 3.25rem;
}

.card__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.95rem;
  color: var(--color-slate-100);
}

.card__list {
  margin-top: 1rem;
  padding-left: 1.1rem;
  list-style: disc;
}

.card__list li {
  font-size: 0.9rem;
  color: var(--color-slate-100);
  margin-bottom: 0.35rem;
}

/* Architecture */
.architecture {
  display: grid;
  gap: 2rem;
}

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

.architecture__hub {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.25rem 2rem;
  border-radius: 999px;
  background: var(--color-white);
  border: 2px solid var(--color-red);
  box-shadow: var(--shadow);
}

.architecture__hub strong {
  font-size: 1.1rem;
  color: var(--color-slate-150);
}

.architecture__hub span {
  font-size: 0.85rem;
  color: var(--color-slate-100);
  margin-top: 0.25rem;
}

.architecture__groups {
  display: grid;
  gap: 1.25rem;
}

.architecture__group {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.architecture__group-title {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-red);
  margin-bottom: 0.75rem;
}

.architecture__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.architecture__item {
  font-size: 0.9rem;
  padding: 0.35rem 0.7rem;
  background: var(--color-neutral-30);
  border-radius: 999px;
  color: var(--color-slate-150);
}

/* Connectors */
.connectors {
  display: grid;
  gap: 1.25rem;
}

.connector {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.connector:hover {
  box-shadow: var(--shadow-hover);
}

.connector__icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.75rem;
}

.connector__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.connector__text {
  font-size: 0.92rem;
  color: var(--color-slate-100);
}

/* Process */
.process {
  display: grid;
  gap: 1rem;
  align-items: center;
}

.process__step {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.process__number {
  width: 2.5rem;
  height: 2.5rem;
  margin: 0 auto 0.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-red);
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
}

.process__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.process__text {
  font-size: 0.92rem;
  color: var(--color-slate-100);
}

.process__arrow {
  display: flex;
  justify-content: center;
  color: var(--color-red);
}

.process__arrow svg {
  width: 1.5rem;
  height: 1.5rem;
  transform: rotate(90deg);
}

/* Benefits */
.benefits {
  display: grid;
  gap: 1.5rem;
}

.benefit {
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(60, 69, 69, 0.1);
}

.benefit__number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-red);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.benefit__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.benefit__text {
  font-size: 0.95rem;
  color: var(--color-slate-100);
}

/* CTA */
.cta {
  max-width: 720px;
  margin: 0 auto;
}

.cta__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta__text {
  font-size: 1.05rem;
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

.cta__note {
  margin-top: 1rem;
  font-size: 0.9rem;
  opacity: 0.75;
}

/* Footer */
.footer {
  background: var(--color-neutral-30);
  padding: 2rem 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  text-align: center;
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--color-slate-100);
}

/* Responsive */
@media (min-width: 640px) {
  .cards--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .cards--3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }

  .nav {
    position: static;
    transform: none;
    top: auto;
    left: auto;
    right: auto;
    height: auto;
    overflow: visible;
    z-index: auto;
    padding: 0;
    background: transparent;
  }

  .nav__list {
    flex-direction: row;
    gap: 1.5rem;
  }

  .nav__list a {
    font-size: 0.9rem;
    border-bottom: none;
    padding: 0;
  }

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

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

  .process {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  }

  .process__arrow svg {
    transform: rotate(0deg);
  }

  .benefits {
    grid-template-columns: repeat(3, 1fr);
  }

  .benefit {
    border-bottom: none;
    border-right: 1px solid rgba(60, 69, 69, 0.1);
    padding: 1.5rem;
  }

  .benefit:last-child {
    border-right: none;
  }
}

@media (min-width: 1024px) {
  .cards--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .connectors {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}