/* Paleta: branco, preto e azul */
:root {
  --bg: #0b0d12;
  --text: #e8eaed;
  --muted: #b1b7c3;
  --card: #12151c;
  --line: #1d2330;
  --blue: #2f80ed;
  --blue-2: #2d9cdb;
  --radius: 20px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 80% -10%, rgba(47,128,237,.15), transparent 60%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(1100px, 90%);
  margin: 0 auto;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: linear-gradient(to bottom, rgba(11,13,18,.9), rgba(11,13,18,.6), transparent);
  backdrop-filter: blur(8px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: .5px;
}

.nav {
  display: flex;
  gap: 18px;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  transition: .2s ease;
}

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

.menu-toggle { display: none; background: transparent; border: 0; color: var(--text); font-size: 24px; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--text);
  transition: .2s ease;
  box-shadow: var(--shadow);
}

.btn:hover { transform: translateY(-1px); }
.btn.primary { background: linear-gradient(135deg, var(--blue), var(--blue-2)); border-color: transparent; }
.btn.ghost { background: transparent; }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  padding: 60px 0 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.15;
  margin: 0 0 10px;
}

.hero p { color: var(--muted); margin: 0 0 18px; }
.cta { display: flex; gap: 12px; }

.hero-art {
  height: 320px;
  border-radius: var(--radius);
  background:
    radial-gradient(120px 60px at 30% 30%, rgba(47,128,237,.5), transparent 60%),
    radial-gradient(120px 60px at 70% 70%, rgba(45,156,219,.45), transparent 60%),
    linear-gradient(135deg, #0f1420, #0b0d12);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

/* Features */
.features { padding: 40px 0; }
.features h2, .about h2, .contact h2 { margin-top: 0; }
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }

/* About */
.about { padding: 20px 0 40px; }
.cols {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 16px;
}
.note {
  background: linear-gradient(180deg, rgba(47,128,237,.15), rgba(45,156,219,.08));
  border: 1px dashed var(--blue-2);
  padding: 16px;
  border-radius: var(--radius);
}

/* Contact form */
.contact { padding: 20px 0 60px; }
.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form label {
  display: grid;
  gap: 6px;
}
.form label span { color: var(--muted); font-size: 14px; }
.form input, .form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0f1420;
  color: var(--text);
}
.form .full { grid-column: 1 / -1; }
.status { margin: 8px 0 0; min-height: 1.2em; color: var(--blue-2); }

/* Footer */
.footer {
  padding: 20px 0 60px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; }
  .nav { display: none; }
  .menu-toggle { display: inline-block; }
  .form { grid-template-columns: 1fr; }
}