/* FreeDSH — landing page. Tudo autocontido: sem fontes externas, sem CDN. */

:root {
  --bg: #0a1020;
  --bg-alt: #0e1729;
  --panel: #121e33;
  --panel-2: #16243c;
  --border: #26374f;
  --text: #e9eef8;
  --muted: #a9b7cc;
  --accent: #7aa2ff;
  --accent-strong: #1d4ed8;
  --accent-soft: #17233c;
  --ok: #4ade80;
  --radius: 14px;
  --wrap: 1080px;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

/* Fundo com brilho suave, apenas decorativo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 420px at 15% -8%, rgba(122, 162, 255, 0.16), transparent 65%),
    radial-gradient(700px 380px at 88% 4%, rgba(74, 222, 128, 0.09), transparent 62%);
  z-index: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 2px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  background: var(--accent-strong);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

h1, h2, h3 { line-height: 1.2; margin: 0 0 12px; }
h1 { font-size: clamp(2.4rem, 7vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.08rem; }

p { margin: 0 0 14px; }

/* ---------- Cabeçalho / hero ---------- */

.hero { position: relative; padding-bottom: 8px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 20px;
  position: relative;
  z-index: 2;
}

.brand { font-weight: 700; letter-spacing: 0.01em; font-size: 1.12rem; }

.lang { display: flex; gap: 4px; padding: 4px; background: var(--panel); border: 1px solid var(--border); border-radius: 999px; }
.lang[hidden] { display: none; }   /* sem JS o alternador não aparece */

.lang-btn {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
}
.lang-btn:hover { color: var(--text); background: var(--accent-soft); }
.lang-btn[aria-pressed="true"] { color: #fff; background: var(--accent-strong); }

.hero-inner { padding: 26px 20px 40px; text-align: center; }

.pill {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  font-size: 0.86rem;
  color: #ffe4a1;
  background: rgba(255, 196, 61, 0.12);
  border: 1px solid rgba(255, 196, 61, 0.42);
  border-radius: 999px;
}

.tagline {
  font-size: clamp(1.08rem, 2.4vw, 1.32rem);
  max-width: 44ch;
  margin: 0 auto 14px;
}
.lede { color: var(--muted); max-width: 68ch; margin: 0 auto 24px; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 22px; }

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.08s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--accent-strong); color: #fff; }
.btn-primary:hover { background: #2563eb; color: #fff; }

.btn-ghost { background: var(--panel); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--panel-2); color: var(--text); border-color: var(--accent); }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; padding: 0; margin: 0; }
.chips li {
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
}

/* ---------- Seções ---------- */

.section { padding: 44px 20px; border-top: 1px solid rgba(38, 55, 79, 0.7); }
.section > p, .section > .hint, .section > .note, .section > .sub { max-width: 72ch; }

.sub { color: var(--muted); margin-top: 24px; }
.hint { color: var(--muted); font-size: 0.94rem; }
.note {
  margin-top: 18px;
  padding: 14px 16px;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
}

/* ---------- Demonstração ---------- */

.demo-figure { margin: 22px 0 10px; }
#demo-gif {
  display: block;
  width: 100%;
  max-width: 960px;
  height: auto;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
figcaption { color: var(--muted); font-size: 0.94rem; text-align: center; margin-top: 12px; }

/* ---------- Blocos de comando ---------- */

.code-block {
  margin: 14px 0 22px;
  background: #060c18;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.code-title { font-size: 0.82rem; color: var(--muted); font-weight: 600; letter-spacing: 0.02em; }

.btn-copy { padding: 6px 14px; font-size: 0.85rem; background: var(--accent-strong); color: #fff; }
.btn-copy:hover { background: #2563eb; color: #fff; }

pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.5;
  color: #d8e4ff;
}
pre code { font-family: inherit; white-space: pre-wrap; word-break: break-word; }

/* ---------- Recursos ---------- */

.grid {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(265px, 1fr));
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.card h3 { display: flex; align-items: center; gap: 8px; }
.card p { color: var(--muted); margin: 0; font-size: 0.96rem; }

/* ---------- Requisitos / segurança ---------- */

.req, .bullets { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 14px; }
.req li {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.req strong { display: block; margin-bottom: 4px; }
.req span { color: var(--muted); font-size: 0.95rem; }

.bullets li {
  position: relative;
  padding-left: 26px;
  color: var(--muted);
}
.bullets li::before {
  content: "›";
  position: absolute;
  left: 8px;
  color: var(--ok);
  font-weight: 700;
}

/* ---------- Rodapé ---------- */

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  padding: 34px 0 40px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 20px; }
.footer-links a { font-size: 0.93rem; }

.disclaimer { color: var(--muted); font-size: 0.9rem; max-width: 80ch; }
.colophon { color: var(--muted); font-size: 0.86rem; margin: 0; }

/* ---------- Responsivo ---------- */

@media (max-width: 620px) {
  body { font-size: 16px; }
  .section { padding: 34px 20px; }
  .hero-inner { padding: 16px 20px 32px; }
  .cta .btn { flex: 1 1 100%; text-align: center; }
  .topbar { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn:hover { transform: none; }
}

/* Impressão simples */
@media print {
  body { background: #fff; color: #000; }
  body::before { display: none; }
  .lang, .cta, .btn-copy { display: none !important; }
}