/* ====== Reset simples e variáveis ====== */
:root{
  --bg: #0b1220;
  --bg-soft: #121a2b;
  --card: #0f1628;
  --text: #eef3ff;
  --muted: #c6d1ffcc;
  --primary: #6ae3ff;
  --primary-2:#a8ffcb;
  --accent: #ffb86b;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html:focus-within{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Poppins,system-ui,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a2650 0%, transparent 60%),
    radial-gradient(900px 600px at 90% 0%, #17314b 0%, transparent 60%),
    linear-gradient(180deg, #0a0f1d, #0c1322 60%, #0b1220);
  min-height:100vh;
}

a{color:var(--primary)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{margin:0 0 .6rem}
p{margin:.4rem 0 1rem;color:var(--muted)}

/* ====== Acessibilidade ====== */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;background:#000;color:#fff;padding:.5rem .75rem;border-radius:.5rem;z-index:999}

/* ====== Topbar / Navbar ====== */
.topbar{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; gap:1rem;
  padding:.6rem 1rem;
  background:rgba(10,16,29,.75);
  backdrop-filter: blur(10px);
  border-bottom:1px solid #ffffff14;
}
.brand{display:flex; align-items:center; gap:.6rem}
.brand .logo{font-size:1.4rem}
.topbar h1{font-size:1rem; font-weight:700; letter-spacing:.3px}

nav{margin-left:auto}
.menu{display:flex; list-style:none; gap:.6rem; padding:0; margin:0}
.menu a{
  display:inline-block; padding:.4rem .7rem; border-radius:.7rem;
  text-decoration:none; color:var(--text); opacity:.85;
}
.menu a.active, .menu a:hover{background:#ffffff0f; opacity:1}
.hamburger{display:none}

/* ====== Buttons ====== */
.btn{border:0; border-radius:14px; padding:.6rem 1rem; cursor:pointer; box-shadow:var(--shadow);
  background:#ffffff10; color:var(--text); transition:.2s transform, .2s background}
.btn:hover{transform:translateY(-1px); background:#ffffff18}
.btn.primary{background:linear-gradient(135deg, var(--primary), var(--primary-2)); color:#00121a}
.btn.ghost{background:#ffffff0a}

/* ====== Layout ====== */
main{max-width:1100px; margin:0 auto; padding:1rem}
.section{margin:1.2rem 0}
.card{
  background: linear-gradient(180deg, #0e172a, #0a1426);
  border:1px solid #ffffff12;
  border-radius:18px; padding:1rem; box-shadow:var(--shadow)
}

.hero{
  display:grid; grid-template-columns:1.2fr 1fr; gap:1.2rem; align-items:center;
  padding:1rem; margin-top:.8rem;
}
.hero-text h2{font-size:1.6rem; line-height:1.2}
.hero-cta{display:flex; gap:.6rem; margin-top:.6rem}

.characters{display:flex; gap:1rem; justify-content:center; align-items:flex-start}
.character{background:#ffffff08; padding:.6rem; border-radius:16px; border:1px solid #ffffff12; width:100%}
.speech{margin-top:.5rem; background:#00000033; padding:.6rem .8rem; border-radius:.8rem}

/* ====== Conceitos ====== */
.btn-row{display:flex; flex-wrap:wrap; gap:.5rem; margin:.6rem 0}
.btn.tag{border-radius:999px; padding:.45rem .9rem}
.concept-box{
  min-height:110px; margin-top:.5rem; padding:1rem;
  border-radius:14px; background:#0c162e; border:1px solid #ffffff16;
  font-size:1rem; line-height:1.5;
}

/* ====== Editor ====== */
/* ========= SEÇÃO EXEMPLOS ========= */
.exemplos h3 {
  font-size: 1.6rem;
  margin-bottom: .5rem;
}

.exemplos p {
  margin-bottom: 1rem;
  opacity: .9;
}

/* Grid mais moderno */
.editor-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.pane {
  background: #1e1e1e;
  border-radius: 12px;
  padding: .5rem;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 10px rgba(0,0,0,.2);
}

.pane-title {
  font-weight: bold;
  color: #61dafb;
  margin-bottom: .3rem;
  font-size: .9rem;
}

textarea {
  background: #282c34;
  color: #eee;
  border: none;
  resize: vertical;
  padding: .5rem;
  font-family: monospace;
  font-size: .9rem;
  border-radius: 8px;
  min-height: 140px;
}

textarea:focus {
  outline: 2px solid #61dafb;
}

/* Botões */
.editor-actions {
  margin: 1rem 0;
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.preview-box {
  margin-top: 1.5rem;
  background: #1e1e1e;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,.25);
}

.preview-box h4 {
  color: #61dafb;
  margin: 0 0 .5rem;
}

.preview {
  width: 100%;
  height: 250px;
  border: none;
  border-radius: 8px;
  background: white;
}


/* ====== Quiz ====== */
.quiz{display:grid; gap:.6rem; margin-top:.6rem}
.question{padding:.8rem; border-radius:12px; background:#0b1832; border:1px solid #ffffff14}
.answers{display:grid; gap:.4rem; margin-top:.4rem}
.answers button{justify-self:start}
.feedback{margin-top:.3rem; font-weight:600}
.correct{color:#9cffd1}
.incorrect{color:#ff9fa0}

/* ====== Form ====== */
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:.8rem}
.form-grid label{display:flex; flex-direction:column; gap:.3rem}
input, textarea{
  padding:.6rem .7rem; border-radius:12px; border:1px solid #ffffff18;
  background:#081226; color:var(--text)
}
.form-actions{display:flex; gap:.6rem; margin-top:.6rem}
.form-feedback{min-height:1.2rem}

/* ====== Footer ====== */
.footer{padding:1rem; text-align:center; color:#a6b3d6; opacity:.9}

/* ====== Util ====== */
.back-to-top{
  position:fixed; right:1rem; bottom:1rem; padding:.6rem .8rem; border-radius:50%;
  display:none;
}
.back-to-top.show{display:block}

/* ====== Responsivo ====== */
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .editor-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .topbar h1{display:none}
  .hamburger{display:inline-block; background:#ffffff10; border:0; border-radius:10px; padding:.3rem .5rem; cursor:pointer}
  .menu{display:none; position:absolute; right:1rem; top:3.2rem; flex-direction:column; background:#0c1426; padding:.6rem; border-radius:12px; border:1px solid #ffffff1a}
  .menu.show{display:flex}
}

/* ====== Tema claro ====== */
body.light{
  --bg: #f5faff;
  --bg-soft: #f0f6ff;
  --card: #ffffff;
  --text: #0e1320;
  --muted: #26334ecc;
  --primary: #0078ff;
  --primary-2:#41d1ff;
  --accent: #ff8a00;
  background: linear-gradient(180deg, #f8fbff, #edf3ff);
}
body.light .card{border-color:#00000010}