/* =========================================
   MAIN.CSS — Layout, Header, Hero, Footer
   ========================================= */

/* --- Base --- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--clr-text);
  background-color: var(--clr-bg);
  min-height: 100vh;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* --- Utility --- */
.text-accent {
  color: var(--clr-accent-2);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  letter-spacing: 0.02em;
  color: var(--clr-white);
}
.logo-text strong {
  font-weight: var(--fw-extra);
  color: var(--clr-accent-2);
}
.logo-text--sm {
  font-size: var(--fs-md);
}

/* ==================
   HEADER
   ================== */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(8, 15, 30, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--clr-border);
  transition:
    border-color var(--transition),
    background var(--transition);
}

.header--scrolled {
  background: rgba(8, 15, 30, 0.97);
  border-color: var(--clr-border-hover);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  padding-block: 1rem;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-4);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: 0.03em;
  color: var(--clr-text-muted);
  border-radius: var(--radius-sm);
  transition:
    color var(--transition),
    background var(--transition);
}

.nav-link:hover {
  color: var(--clr-text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link--external {
  border: 1px solid var(--clr-border);
  color: var(--clr-accent-2);
}
.nav-link--external:hover {
  border-color: var(--clr-accent);
  background: rgba(59, 130, 246, 0.08);
  color: var(--clr-white);
}
.nav-link--external svg {
  opacity: 0.7;
}

/* ==================
   HERO
   ================== */
.hero {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: calc(100vh - 82px);
  padding-top: 82px;
}

/* Dot-grid background */
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.06) 1px,
    transparent 1px
  );
  background-size: 32px 32px;
  mask-image: radial-gradient(
    ellipse 80% 80% at 50% 50%,
    black 40%,
    transparent 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 80% at 50% 50%,
    black 40%,
    transparent 100%
  );
}

/* Glows */
.hero__glow {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(80px);
  pointer-events: none;
}
.hero__glow--1 {
  width: 600px;
  height: 400px;
  top: -80px;
  left: 50%;
  transform: translateX(-60%);
  background: radial-gradient(
    circle,
    rgba(59, 130, 246, 0.18) 0%,
    transparent 70%
  );
}
.hero__glow--2 {
  width: 400px;
  height: 300px;
  bottom: 0;
  right: 5%;
  background: radial-gradient(
    circle,
    rgba(96, 165, 250, 0.1) 0%,
    transparent 70%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: var(--sp-12) var(--sp-16);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--sp-6);
  width: 100%;
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent-2);
  padding: var(--sp-2) var(--sp-5);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-full);
  width: fit-content;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-2xl), 2vw, var(--fs-4xl));
  font-weight: var(--fw-extra);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  max-width: 720px;
}

.hero__subtitle {
  font-size: var(--fs-md);
  font-weight: var(--fw-light);
  color: var(--clr-text-muted);
  max-width: 480px;
  line-height: var(--lh-normal);
}

/* ==================
   SISTEMAS SECTION
   ================== */
.sistemas {
  display: none;
}

.section-header {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-xl), 3vw, var(--fs-2xl));
  font-weight: var(--fw-bold);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-3);
}

.section-subtitle {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  font-weight: var(--fw-light);
}

/* ==================
   FOOTER
   ================== */
.footer {
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  padding-top: var(--sp-16);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--sp-12);
  padding-bottom: var(--sp-12);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__tagline {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  max-width: 220px;
}

.footer__heading {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--sp-5);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__link {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  transition: color var(--transition);
  line-height: var(--lh-snug);
}
.footer__link svg {
  flex-shrink: 0;
  margin-top: 1px;
  opacity: 0.6;
}
.footer__link:hover {
  color: var(--clr-text);
}
.footer__link--text {
  cursor: default;
}

.footer__link--arrow::before {
  content: "›";
  color: var(--clr-accent);
  font-size: var(--fs-md);
  line-height: 1;
  margin-top: -1px;
}
.footer__link--arrow:hover {
  color: var(--clr-accent-2);
}

.footer__bottom {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--sp-5);
  text-align: center;
}
.footer__bottom p {
  font-size: var(--fs-xs);
  color: var(--clr-text-dim);
}

/* ==================
   BUTTONS
   ================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-8);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: 0.04em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition),
    border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--transition);
}
.btn:hover::after {
  background: rgba(255, 255, 255, 0.06);
}
.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--clr-accent);
  color: var(--clr-white);
  border-color: var(--clr-accent);
  box-shadow: 0 0 24px rgba(59, 130, 246, 0.3);
}
.btn--primary:hover {
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.5);
  transform: translateY(-2px);
}

.btn--card {
  background: rgba(59, 130, 246, 0.12);
  color: var(--clr-accent-2);
  border-color: rgba(59, 130, 246, 0.25);
  width: 100%;
  justify-content: center;
  padding-block: var(--sp-3);
  font-size: var(--fs-sm);
}
.btn--card:hover {
  background: var(--clr-accent);
  color: var(--clr-white);
  border-color: var(--clr-accent);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
  transform: translateY(-1px);
}

/* ==================
   RESPONSIVE
   ================== */
@media (max-width: 768px) {
  :root {
    --container-pad: 1rem;
  }

  .header__nav .nav-link:not(.nav-link--external) {
    display: none;
  }

  .hero__content {
    padding-block: var(--sp-16);
  }
  .hero__title {
    font-size: var(--fs-2xl);
  }

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

  .sistemas {
    padding-block: var(--sp-16);
  }
}