/* ============================================================
   TechUp Sistemas — site institucional
   Tema: DARK (padrão IA_GO / SISUM — fundo quase preto + glass)
   ============================================================ */

:root {
  /* Cores — escala escura padrão dos sistemas (slate, como IA_GO) */
  --bg: #020617;            /* fundo geral (igual IA_GO) */
  --bg-alt: #0b1120;        /* seções alternadas */
  --surface: rgba(255, 255, 255, 0.04);  /* cards glass */
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);   /* bordas white/10 */
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #f1f5f9;          /* texto principal (claro) */
  --muted: #94a3b8;         /* texto secundário (slate-400) */
  --faint: #64748b;         /* detalhes apagados (slate-500) */

  --accent: #2f6bff;        /* azul da marca TechUp */
  --accent-2: #6366f1;      /* índigo (família IA_GO) p/ gradientes */
  --accent-soft: rgba(47, 107, 255, 0.14);  /* fundo de tags */
  --accent-glow: rgba(99, 102, 241, 0.35);

  /* Tipografia */
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;

  /* Espaçamento */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  /* Raios e sombra */
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);

  /* Layout */
  --container: 1100px;
}

/* ---------- Reset básico ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; color-scheme: dark; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px circle at 15% -10%, rgba(99, 102, 241, 0.13), transparent 55%),
    radial-gradient(800px circle at 95% 15%, rgba(47, 107, 255, 0.10), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

h1 { font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }

::selection { background: var(--accent-glow); color: #fff; }

/* Scrollbar dark (padrão dos sistemas) */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(2, 6, 23, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
}

.brand em {
  font-style: normal;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.2rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0.4rem 0.2rem;
  transition: color 0.15s;
}

.main-nav a:hover { color: var(--text); }

.main-nav .nav-cta {
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0.55rem 1.2rem;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(47, 107, 255, 0.30);
  transition: background 0.15s, box-shadow 0.15s;
}

.main-nav .nav-cta:hover { background: #1d56e0; }

/* Botão hambúrguer (mobile) */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--text);
  transition: transform 0.2s, opacity 0.2s;
}

.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 {
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(47, 107, 255, 0.30), transparent 60%),
    radial-gradient(800px 400px at 10% 110%, rgba(99, 102, 241, 0.16), transparent 60%),
    transparent;
  border-bottom: 1px solid var(--border);
  padding: var(--space-6) 0 var(--space-5);
}

.hero-inner { max-width: 780px; margin-inline: auto; text-align: left; }

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.hero .eyebrow { color: #8fb0ff; }

.hero-sub {
  margin-top: var(--space-3);
  font-size: 1.2rem;
  color: #b6c0d4;
  max-width: 560px;
}

.hero-actions {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  transition: transform 0.12s, background 0.15s, box-shadow 0.15s;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(47, 107, 255, 0.35);
}

.btn-primary:hover { background: #1d56e0; }

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.06); }

/* ---------- Seções ---------- */
.section { padding: var(--space-6) 0; }

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section h2 { margin-bottom: var(--space-4); }

/* ---------- Serviços (lista editorial numerada) ---------- */
.servicos-lista {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4) var(--space-5);
}

.servicos-lista li {
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-strong);
}

.servico-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.servicos-lista h3 { margin: var(--space-1) 0 0.4rem; }

.servicos-lista p { color: var(--muted); font-size: 1rem; }

/* ---------- Sistemas ---------- */
.sistemas-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.sistema-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  padding: var(--space-4) var(--space-3);
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.sistema-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 107, 255, 0.45);
  background: var(--surface-hover);
  box-shadow: var(--shadow), 0 0 24px rgba(47, 107, 255, 0.10);
}

.sistema-card h3 { margin-bottom: var(--space-2); }

.sistema-card p { color: var(--muted); font-size: 0.98rem; margin-bottom: var(--space-3); }

.sistema-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8fb0ff;
  background: var(--accent-soft);
  border: 1px solid rgba(47, 107, 255, 0.25);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}

/* ---------- Sobre ---------- */
.sobre-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-5);
  align-items: center;
}

.sobre-texto p:not(.eyebrow) { color: var(--muted); max-width: 480px; margin-bottom: var(--space-3); }

.sobre-quadro {
  position: relative;
  background:
    radial-gradient(400px 260px at 100% 0%, rgba(47, 107, 255, 0.30), transparent 65%),
    linear-gradient(160deg, #0d1526, #0b1120);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
}

.quadro-logo {
  opacity: 0.95;
  filter: drop-shadow(0 4px 12px rgba(47, 107, 255, 0.35));
}

.quadro-nome {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.quadro-tagline {
  color: #a7aec2;
  font-size: 1rem;
  max-width: 220px;
}

/* ---------- Contato ---------- */
.contato-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

.contato-itens { display: flex; flex-direction: column; gap: var(--space-2); }

.contato-itens a {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(12px);
  transition: border-color 0.15s, transform 0.12s, background 0.15s;
}

.contato-itens a:hover { border-color: var(--accent); transform: translateX(4px); background: var(--surface-hover); }

.contato-itens strong { font-family: var(--font-display); font-size: 0.95rem; }

.contato-itens span { color: var(--muted); font-size: 0.95rem; }

/* ---------- Rodapé ---------- */
.site-footer {
  background: #030407;
  border-top: 1px solid var(--border);
  color: #64748b;
  padding: var(--space-4) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: 0.9rem;
}

/* ---------- Foco acessível ---------- */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- Responsivo ---------- */
@media (max-width: 860px) {
  .servicos-lista { grid-template-columns: 1fr; }

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

  .sobre-inner, .contato-inner { grid-template-columns: 1fr; }

  .menu-toggle { display: flex; }

  .main-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(2, 6, 23, 0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: var(--space-2) var(--space-3) var(--space-3);
    display: none;
  }

  .main-nav.open { display: flex; }

  .main-nav a { padding: 0.8rem 0.2rem; font-size: 1.05rem; }

  .main-nav .nav-cta { text-align: center; margin-top: 0.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}