:root {
  --bg: #0d1117; --panel: #161b22; --card: #1c2330; --border: #2a3140;
  --text: #e6edf3; --muted: #8b949e; --accent: #f7931a; --accent2: #627eea;
  --up: #3fb950; --down: #f85149; --radius: 10px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.55; }
.hidden { display: none !important; }
a { color: var(--accent); text-decoration: none; }
h1 { margin: 0 0 16px; font-size: 1.7rem; }
h2 { margin: 28px 0 12px; font-size: 1.25rem; }
h3 { margin: 0 0 8px; }
.tiny { font-size: .78rem; }
.muted { color: var(--muted); }
.pre { white-space: pre-wrap; }

/* Topbar / landing */
.topbar, .appbar { display: flex; align-items: center; gap: 20px; padding: 14px 28px; background: var(--panel); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topbar nav { margin-left: auto; display: flex; gap: 18px; align-items: center; }
.logo { font-size: 1.2rem; font-weight: 700; color: var(--text); }
.logo span { color: var(--accent); }
.hero { padding: 64px 28px 40px; text-align: center; }
.hero h1 { font-size: 2.3rem; max-width: 820px; margin: 0 auto 16px; }
.hero .sub { color: var(--muted); max-width: 700px; margin: 0 auto 28px; font-size: 1.05rem; }
.hero-cta { display: flex; gap: 14px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.hero-preview { max-width: 640px; margin: 0 auto; }
.mock-dash { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align: left; box-shadow: 0 12px 40px rgba(0,0,0,.4); }
.mock-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.mock-pulse { padding-top: 12px; color: var(--muted); font-size: .85rem; }
.band { max-width: 1000px; margin: 0 auto; padding: 44px 28px; }
.band.alt { background: var(--panel); }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; max-width: 900px; margin: 0 auto; }
.plan { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; }
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.plan .price { font-size: 1.6rem; font-weight: 700; margin: 8px 0; }
.faq p { margin-bottom: 10px; }
.footer { padding: 40px 28px; text-align: center; color: var(--muted); font-size: .85rem; border-top: 1px solid var(--border); }
form { display: flex; flex-direction: column; gap: 10px; max-width: 420px; margin: 0 auto; }
.band form { align-items: center; }
input, select, textarea { background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 10px 12px; border-radius: 8px; font-size: .95rem; width: 100%; }
textarea { min-height: 64px; font-family: monospace; font-size: .8rem; }
label { font-size: .85rem; color: var(--muted); }
.consent { display: flex; gap: 8px; align-items: center; font-size: .8rem; }
.consent input { width: auto; }

/* Botões */
.btn { display: inline-block; padding: 10px 20px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--text); cursor: pointer; font-size: .95rem; font-weight: 600; }
.btn:hover { filter: brightness(1.15); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #1a1205; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Auth */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; width: 100%; max-width: 400px; }
.auth-card h2 { margin: 12px 0 20px; }
.auth-card .logo { margin-bottom: 6px; }
.auth-card form { max-width: none; }
.auth-card .muted { margin-top: 16px; text-align: center; font-size: .85rem; }

/* App shell */
.userbox { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.appbar #global-search { max-width: 320px; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: .72rem; font-weight: 700; background: var(--border); color: var(--text); text-transform: uppercase; }
.badge.plan-member { background: var(--accent2); }
.badge.plan-admin { background: var(--accent); color: #1a1205; }
.shell { display: grid; grid-template-columns: 230px 1fr; min-height: calc(100vh - 61px); }
.sidebar { background: var(--panel); border-right: 1px solid var(--border); padding: 16px 0; }
.sidebar a { display: block; padding: 10px 22px; color: var(--muted); cursor: pointer; font-size: .95rem; }
.sidebar a:hover { color: var(--text); background: var(--card); }
.sidebar a.active { color: var(--accent); border-right: 3px solid var(--accent); background: var(--card); }
.sidebar .logout { color: var(--down); }
main { padding: 28px; max-width: 1100px; }

/* Cards / tabelas */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 14px; }
.card.mini { padding: 14px; margin: 0; }
.card .lbl { display: block; font-size: .72rem; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.card-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 14px; }
.card.course, .card.lesson { cursor: pointer; transition: border-color .15s; }
.card.course:hover, .card.lesson:hover { border-color: var(--accent); }
.up { color: var(--up); }
.down { color: var(--down); }
.ok-result { color: var(--up); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--panel); color: var(--muted); font-size: .78rem; text-transform: uppercase; }
.mini-table th, .mini-table td { padding: 6px 10px; }
.notice { border: 1px solid var(--border); border-left: 4px solid var(--accent2); border-radius: 8px; padding: 14px 18px; margin: 16px 0; font-size: .9rem; }
.notice.warn { border-left-color: var(--down); }
.notice.ok { border-left-color: var(--up); }
.pulse { margin-top: 20px; }
.chart-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.inline-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; max-width: none; margin-bottom: 16px; }
.inline-form input, .inline-form select { width: auto; min-width: 140px; }
.ap-row { display: flex; gap: 8px; margin-bottom: 8px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; flex-wrap: wrap; }
.tabs a { padding: 10px 16px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); padding: 12px 22px; border-radius: 8px; font-size: .9rem; z-index: 100; box-shadow: 0 8px 30px rgba(0,0,0,.5); }
.toast.ok { background: #1f6f34; color: #eafff1; }
.toast.err { background: #8b1d1d; color: #ffe9e9; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: flex; overflow-x: auto; padding: 0; }
  .sidebar a { white-space: nowrap; }
  .sidebar a.active { border-right: 0; border-bottom: 3px solid var(--accent); }
  .hero h1 { font-size: 1.6rem; }
}