/* fastteacher.dev — estilo do portal. Tokens em :root; tema escuro pelo sistema. */
:root {
  --bg: #f6f7fb; --surface: #ffffff; --text: #101828; --muted: #52607a; --border: #dde3ee;
  --primary: #1e3a8a; --primary-2: #2563eb; --on-primary: #ffffff; --accent: #0ea5e9;
  --ok: #067647; --warn: #b54708; --danger: #b42318; --radius: 14px;
  --shadow: 0 10px 30px rgb(16 24 40 / 0.08);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1020; --surface: #121a30; --text: #e8ecf5; --muted: #9aa6bf; --border: #24304d; --primary: #3b82f6; --primary-2: #60a5fa; --on-primary: #06122b; --shadow: 0 10px 30px rgb(0 0 0 / 0.35); color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary-2); }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { width: 32px; height: 32px; }
.top nav { margin-left: auto; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.top nav a:hover { color: var(--text); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--primary-2); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; border: 0; }
.btn-small { padding: 6px 12px; font-size: 14px; }
.btn-danger { color: var(--danger); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.hero { padding: 72px 0 48px; text-align: center; }
.hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 20px; color: var(--muted); max-width: 720px; margin: 0 auto 28px; }
.hero .actions { justify-content: center; }
.pill { display: inline-block; padding: 4px 12px; border-radius: 999px; background: color-mix(in srgb, var(--primary-2) 14%, transparent); color: var(--primary-2); font-weight: 600; font-size: 14px; margin-bottom: 16px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

section { padding: 56px 0; }
section h2 { font-size: 32px; margin: 0 0 8px; letter-spacing: -0.01em; }
.sub { color: var(--muted); margin: 0 0 28px; }
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.steps li { counter-increment: step; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.steps li::before { content: counter(step); display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--primary-2); color: #fff; font-weight: 700; margin-bottom: 8px; }

.plans { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: stretch; max-width: 760px; margin-inline: auto; }
.plan { display: flex; flex-direction: column; gap: 10px; }
.plan.featured { border: 2px solid var(--primary-2); }
.price { font-size: 34px; font-weight: 800; }
.price small { font-size: 15px; color: var(--muted); font-weight: 500; }
.plan ul { padding-left: 20px; margin: 0; color: var(--muted); flex: 1; }

form.box, .box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
label { display: grid; gap: 4px; font-weight: 600; font-size: 14px; margin-bottom: 12px; }
input, select { font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
input:focus, select:focus, .btn:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
.msg { min-height: 1.4em; margin: 8px 0 0; font-size: 14px; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }
.hint { color: var(--muted); font-size: 14px; }
.hidden { display: none !important; }

.keybox { font-family: ui-monospace, Consolas, monospace; font-size: 18px; letter-spacing: 0.04em; padding: 10px 14px; border-radius: 10px; background: var(--bg); border: 1px dashed var(--primary-2); display: inline-block; user-select: all; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.tag.off { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }
.stats { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat b { display: block; font-size: 28px; }

.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 600; }
.legal h2 { font-size: 22px; margin-top: 32px; }
footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--muted); }
@media (max-width: 640px) { .top nav a.hide-sm { display: none; } section { padding: 40px 0; } }
#buy-form { margin-top: 24px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs button[aria-selected="true"] { border-color: var(--primary-2); color: var(--primary-2); }
.license { margin-bottom: 18px; }
.license header { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: baseline; }
.machines { list-style: none; padding: 0; margin: 10px 0; display: grid; gap: 6px; }
.machines li { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; }
.inline-form label { margin: 0; }
.page { padding: 40px 0 64px; }
.spread { justify-content: space-between; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 50; max-width: min(520px, calc(100vw - 32px)); padding: 14px 18px; border-radius: 12px; background: var(--surface); color: var(--text); border: 1px solid var(--border); box-shadow: var(--shadow); font-size: 15px; transition: opacity .3s, transform .3s; }
.toast.ok { border-color: var(--ok); }
.toast.error { border-color: var(--danger); }
.toast.hide { opacity: 0; transform: translate(-50%, 12px); pointer-events: none; }