/* ==================================================
   VARIÁVEIS
================================================== */
:root {
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.25);

  --bg-main: #1f6fa6;
  --panel-bg: rgba(6, 14, 30, 0.85);
  --panel-bg-hover: rgba(6, 14, 30, 0.95);

  --text-main: #ffffff;
  --text-muted: #cfd8dc;
}

/* ==================================================
   RESET
================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

/* ==================================================
   BACKGROUND BLUEPRINT
================================================== */
body {
  min-height: 100vh;
  color: var(--text-main);

  background-color: var(--bg-main);
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.25) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.25) 1px, transparent 1px),
    linear-gradient(to right, rgba(255,255,255,0.7) 2px, transparent 2px),
    linear-gradient(to bottom, rgba(255,255,255,0.7) 2px, transparent 2px);

  background-size:
    20px 20px,
    20px 20px,
    100px 100px,
    100px 100px;
}

/* ==================================================
   LOGO
================================================== */
.topbar {
  text-align: center;
  padding: 60px 20px 30px;
}

.brand {
  display: inline-block;
  padding: 16px 34px;
  border-radius: 18px;
  background: rgba(6, 14, 30, 0.55);
  backdrop-filter: blur(6px);

  box-shadow:
    0 20px 38px rgba(0,0,0,0.65),
    0 0 32px rgba(0,229,255,0.35);
}

.brand h1 {
  font-size: 38px;
  letter-spacing: 4px;
  color: var(--accent);

  text-shadow:
    0 6px 14px rgba(0,0,0,0.95),
    0 0 30px rgba(0,229,255,0.9);
}

/* ==================================================
   MENU CENTRAL (ABAS)
================================================== */
.tabs-center {
  display: flex;
  justify-content: center;
  gap: 18px;

  margin: 40px auto 70px;
  padding: 18px 30px;

  width: fit-content;
  background: var(--panel-bg);
  border-radius: 24px;

  box-shadow:
    0 18px 36px rgba(0,0,0,0.55),
    0 0 26px rgba(0,229,255,0.18);
}

.tab-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 16px;

  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;

  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab-btn:hover {
  color: var(--text-main);
  border-color: var(--accent);
  box-shadow: 0 0 14px rgba(0,229,255,0.45);
}

.tab-btn.active {
  color: var(--text-main);
  border-color: var(--accent);
  background: rgba(0,229,255,0.15);
}

/* ==================================================
   CONTEÚDO
================================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 90px;
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

.tab-content.active {
  display: block;
}

/* ==================================================
   CARDS
================================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.card {
  display: block;
  text-decoration: none;

  background: var(--panel-bg);
  border-radius: 20px;
  padding: 34px;

  border: 1px solid rgba(255,255,255,0.12);
  transition: all 0.3s ease;
}

.card h4 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--text-main);
}

.card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.5;
}

.card:hover {
  transform: translateY(-10px);
  background: var(--panel-bg-hover);
  border-color: var(--accent-soft);

  box-shadow:
    0 22px 34px rgba(0,0,0,0.5),
    0 0 26px rgba(0,229,255,0.25);
}

/* ==================================================
   RODAPÉ
================================================== */
.footer {
  text-align: center;
  padding: 26px;
  background: rgba(6, 14, 30, 0.9);
  color: var(--text-muted);
  font-size: 14px;
}

/* ==================================================
   ANIMAÇÕES
================================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================================================
   RESPONSIVO
================================================== */
@media (max-width: 768px) {
  .tabs-center {
    flex-wrap: wrap;
    gap: 12px;
  }

  .tab-btn {
    padding: 10px 16px;
  }

  .brand h1 {
    font-size: 30px;
  }
}