:root {
  --bg: #0f1021;
  --bg-2: #171832;
  --card: #1e1f3d;
  --txt: #eef0ff;
  --txt-2: #a9ace0;
  --pri: #7c5cff;
  --pri-2: #00d4ff;
  --acc: #ff5c8a;
  --grad: linear-gradient(135deg, #7c5cff, #00d4ff);
  --radius: 18px;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Poppins', Arial, sans-serif; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--txt); overflow-x: hidden; }

/* ===== HEADER ===== */
header {
  position: sticky; top: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 5%; background: rgba(15,16,33,.8); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.logo { font-size: 22px; font-weight: 800; text-decoration: none; color: #fff; }
.logo span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
nav { display: flex; align-items: center; gap: 26px; }
nav a { color: var(--txt-2); text-decoration: none; font-size: 15px; font-weight: 500; transition: color .2s; }
nav a:hover { color: #fff; }
.btn {
  display: inline-block; background: var(--grad); color: #fff; border: none; cursor: pointer;
  padding: 12px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  text-decoration: none; transition: transform .2s, box-shadow .2s;
  box-shadow: 0 6px 20px rgba(124,92,255,.35);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(124,92,255,.5); }
.btn-outline {
  background: transparent; border: 2px solid var(--pri); box-shadow: none;
}
.btn-outline:hover { background: rgba(124,92,255,.15); box-shadow: none; }

/* ===== HERO ===== */
.hero {
  position: relative; text-align: center; padding: 120px 20px 100px;
  background:
    radial-gradient(600px 300px at 20% 20%, rgba(124,92,255,.25), transparent),
    radial-gradient(600px 300px at 80% 30%, rgba(0,212,255,.18), transparent);
  overflow: hidden;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 32px 32px; pointer-events: none;
}
.hero .tag {
  display: inline-block; padding: 8px 18px; border-radius: 999px; font-size: 13px;
  font-weight: 600; letter-spacing: .5px; color: var(--pri-2);
  border: 1px solid rgba(0,212,255,.35); background: rgba(0,212,255,.08); margin-bottom: 24px;
}
.hero h2 { font-size: clamp(34px, 6vw, 60px); font-weight: 800; line-height: 1.15; max-width: 820px; margin: 0 auto 20px; }
.hero h2 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { font-size: 18px; color: var(--txt-2); max-width: 620px; margin: 0 auto 36px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== STATS ===== */
.stats { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; padding: 30px 20px 10px; }
.stat { text-align: center; }
.stat b { display: block; font-size: 34px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat small { color: var(--txt-2); font-size: 14px; }

/* ===== SECTIONS ===== */
section { padding: 90px 5%; max-width: 1200px; margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .kicker { color: var(--pri-2); font-weight: 600; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.section-head h3 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin: 10px 0 14px; }
.section-head p { color: var(--txt-2); max-width: 600px; margin: 0 auto; }

/* ===== ARTIGOS (cards) ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 26px; }
.card {
  background: var(--card); border: 1px solid rgba(255,255,255,.07); border-radius: var(--radius);
  padding: 30px; transition: transform .25s, border-color .25s, box-shadow .25s; position: relative; overflow: hidden;
  text-decoration: none; display: block; color: inherit;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--grad); opacity: 0; transition: opacity .25s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(124,92,255,.5); box-shadow: 0 14px 40px rgba(0,0,0,.35); }
.card:hover::before { opacity: 1; }
.card .emoji { font-size: 34px; margin-bottom: 16px; display: inline-block; }
.card .cat { font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; color: var(--acc); }
.card h4 { font-size: 19px; font-weight: 700; margin: 8px 0 10px; line-height: 1.35; }
.card p { color: var(--txt-2); font-size: 14px; line-height: 1.65; margin-bottom: 16px; }
.card a { color: var(--pri-2); font-size: 14px; font-weight: 600; text-decoration: none; }
.card a:hover { text-decoration: underline; }

/* ===== PÁGINA DE MATÉRIA ===== */
.artigo { max-width: 820px; padding: 70px 5%; }
.artigo .cat { font-size: 13px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--acc); }
.artigo h1 { font-size: clamp(28px, 5vw, 44px); font-weight: 800; line-height: 1.2; margin: 14px 0 18px; }
.artigo .meta { color: var(--txt-2); font-size: 14px; margin-bottom: 40px; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.1); }
.artigo .conteudo p { color: var(--txt-2); line-height: 1.9; font-size: 16.5px; margin-bottom: 22px; }
.artigo .conteudo h3 { font-size: 24px; font-weight: 700; margin: 36px 0 14px; color: #fff; }
.artigo .conteudo ul { margin: 0 0 22px 24px; }
.artigo .conteudo li { color: var(--txt-2); line-height: 1.8; margin-bottom: 8px; font-size: 16px; }
.artigo .emoji-hero { font-size: 64px; margin-bottom: 20px; display: block; }
.artigo-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 50px; flex-wrap: wrap; }
.callout {
  background: var(--card); border-left: 4px solid var(--pri); border-radius: 12px;
  padding: 22px 26px; margin: 26px 0; color: var(--txt-2); line-height: 1.8; font-size: 15.5px;
}

/* ===== SOBRE ===== */
#sobre {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  background: var(--bg-2); border-radius: 30px; padding: 70px; max-width: 1200px;
}
#sobre h3 { font-size: clamp(26px, 3.5vw, 38px); font-weight: 800; margin-bottom: 18px; }
#sobre p { color: var(--txt-2); line-height: 1.8; margin-bottom: 14px; }
.sobre-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.sobre-tile {
  border-radius: var(--radius); padding: 30px 20px; text-align: center; font-weight: 700; font-size: 15px;
  background: var(--card); border: 1px solid rgba(255,255,255,.07);
}
.sobre-tile span { display: block; font-size: 30px; margin-bottom: 10px; }
.sobre-tile.hi { background: var(--grad); border: none; color: #fff; }

/* ===== CONTATO ===== */
#contato { max-width: 760px; }
.form-card {
  background: var(--card); border: 1px solid rgba(255,255,255,.07);
  border-radius: 24px; padding: 48px; box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--txt); }
input, textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px; font-size: 15px;
  background: var(--bg); border: 1px solid rgba(255,255,255,.12); color: var(--txt);
  outline: none; transition: border-color .2s, box-shadow .2s; font-family: inherit;
}
input:focus, textarea:focus { border-color: var(--pri); box-shadow: 0 0 0 3px rgba(124,92,255,.2); }
textarea { min-height: 140px; resize: vertical; }
#contato .btn { width: 100%; font-size: 16px; padding: 16px; }
.form-ok { display: none; text-align: center; color: var(--pri-2); font-weight: 600; margin-top: 14px; }

/* ===== FOOTER ===== */
footer {
  background: var(--bg-2); border-top: 1px solid rgba(255,255,255,.07);
  text-align: center; padding: 40px 20px; color: var(--txt-2); font-size: 14px;
}
footer .logo { display: inline-block; margin-bottom: 10px; }

/* ===== RESPONSIVO ===== */
@media (max-width: 900px) {
  #sobre { grid-template-columns: 1fr; padding: 44px; }
  nav a:not(.btn) { display: none; }
}
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .stats { gap: 30px; }
}