/*
  Design system compartilhado — murilo.engineering
  Tokens, reset, tipografia, header/footer e componentes base
  usados tanto no site principal quanto nas landing pages.
*/

:root {
  /* Cores */
  --bg: #070c14;
  --bg-soft: #0b1420;
  --bg-elevated: #0f1a28;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(157, 182, 204, 0.16);
  --border-strong: rgba(0, 212, 255, 0.5);
  --text: #eef4fb;
  --text-muted: #97abc0;
  --text-dim: #64798f;
  --accent: #00d4ff;
  --accent-2: #ff7f41;
  --accent-3: #54ffb5;
  --accent-contrast: #051019;

  /* Tipografia */
  --font-display: 'Rajdhani', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Source Code Pro', ui-monospace, monospace;

  /* Espaçamento e forma */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --container: 1160px;
  --shadow-md: 0 16px 40px rgba(2, 6, 12, 0.4);
  --shadow-lg: 0 24px 60px rgba(2, 6, 12, 0.55);
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 6%, rgba(18, 50, 83, 0.55) 0%, transparent 42%),
    radial-gradient(circle at 88% 0%, rgba(255, 127, 65, 0.08) 0%, transparent 38%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scrollbar-color: rgba(0, 212, 255, 0.4) transparent;
  scrollbar-width: thin;
}

::selection {
  background: var(--accent-2);
  color: var(--accent-contrast);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.35);
  border-radius: var(--radius-pill);
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.4px;
  line-height: 1.15;
  color: var(--text);
}

p {
  margin: 0 0 1em;
  color: var(--text-muted);
}

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

button {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-family: var(--font-display);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 12px;
  text-decoration: none;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 1em;
  height: 1em;
  fill: currentColor;
  flex-shrink: 0;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: var(--radius-pill);
}

.section-heading {
  max-width: 640px;
  margin: 0 0 40px;
}

.section-heading h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.section-heading p {
  margin-top: 12px;
  font-size: 1.02rem;
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(6, 16, 26, 0.6);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.84rem;
}

.card {
  border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--surface), rgba(255, 255, 255, 0.01));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.5px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), filter 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--accent-contrast);
  background: linear-gradient(120deg, var(--accent), var(--accent-3));
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 14px 30px rgba(0, 212, 255, 0.32);
  filter: brightness(1.04);
}

.btn-secondary {
  color: var(--text);
  border-color: var(--border);
  background: rgba(8, 18, 30, 0.6);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--border-strong);
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(6, 13, 22, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  box-shadow: 0 10px 30px rgba(2, 6, 12, 0.35);
}

.site-header-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.brand .brand-dot {
  color: var(--accent);
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 30px;
}

.main-nav a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  padding: 6px 2px;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -3px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: right 0.25s var(--ease);
  border-radius: var(--radius-pill);
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a.is-active {
  color: var(--text);
  text-decoration: none;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after,
.main-nav a.is-active::after {
  right: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-links a {
  display: inline-flex;
  color: var(--text-muted);
  font-size: 1.15rem;
}

.social-links a:hover,
.social-links a:focus-visible {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(8, 18, 30, 0.6);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle .icon {
  width: 20px;
  height: 20px;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(5, 11, 19, 0.98);
    backdrop-filter: blur(10px);
    padding: 28px 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
    overflow-y: auto;
  }

  .main-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .main-nav a {
    display: block;
    width: 100%;
    padding: 14px 6px;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border);
  }

  .main-nav a::after {
    display: none;
  }

  .header-actions .social-links {
    display: none;
  }

  .main-nav .nav-social {
    display: flex;
    gap: 20px;
    margin-top: 20px;
  }

  .main-nav .nav-social a {
    border: none;
    padding: 0;
    font-size: 1.4rem;
  }
}

@media (min-width: 861px) {
  .main-nav .nav-social {
    display: none;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 52px 0 28px;
}

.site-footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
}

.footer-brand .brand {
  margin-bottom: 10px;
}

.footer-brand p {
  max-width: 340px;
  font-size: 0.95rem;
}

.footer-col h3 {
  font-size: 0.85rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-bottom .social-links a {
  font-size: 1.1rem;
}

@media (max-width: 720px) {
  .site-footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}