/* Nullain Cloner — landing page. Mesmo idioma visual do popup: preto & branco,
   grade sutil, mono para labels técnicos, SVG ao invés de emojis, bordas
   arredondadas, glow discreto. */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

:root {
  --bg: #050505;
  --surface: #0d0d0d;
  --surface-2: #141414;
  --border: #262626;
  --border-strong: #3a3a3a;
  --fg: #f5f5f5;
  --fg-dim: #9a9a9a;
  --fg-faint: #5c5c5c;
  --radius: 16px;
  --radius-sm: 12px;
  --mono: 'Cascadia Code', 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max: 720px;
}

body {
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

::selection { background: var(--fg); color: #000; }

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(0, 0, 0, 0.9), transparent 70%);
}

/* ---- Topbar ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  border: 1px solid var(--border-strong);
  image-rendering: pixelated;
}

.brand-name {
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.14em;
}
.brand-name .thin { font-weight: 300; color: var(--fg-dim); margin-left: 5px; }

.version {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--fg-dim);
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

/* ---- Unsupported browser banner ---- */
.unsupported-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--fg-dim);
}
.unsupported-banner svg { flex-shrink: 0; color: var(--fg); }

/* ---- Hero ---- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 20px 40px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--fg-faint);
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.lead {
  max-width: 480px;
  margin: 0 auto 32px;
  color: var(--fg-dim);
  font-size: 15px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
}

.btn-primary {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 16px 28px;
  background: var(--fg);
  color: #000;
  border: 1px solid var(--fg);
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.25s ease, background 0.2s ease;
}
.btn-primary svg { margin-bottom: 2px; }
.btn-primary .btn-sub {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.04em;
  opacity: 0.6;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(255, 255, 255, 0.22); background: #e8e8e8; }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 22px;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.btn-ghost:hover { border-color: var(--fg); background: var(--surface); }

.trust-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}
.trust-row span { display: inline-flex; align-items: center; gap: 6px; }
.trust-row svg { color: var(--fg-dim); }

/* ---- Honesty callout ---- */
.honesty {
  max-width: var(--max);
  margin: 0 auto 48px;
  padding: 20px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.honesty-icon { flex-shrink: 0; color: var(--fg-dim); margin-top: 2px; }
.honesty p { margin: 0; font-size: 13px; color: var(--fg-dim); }
.honesty strong { color: var(--fg); }
.honesty em { color: var(--fg); font-style: normal; }

/* ---- Steps ---- */
.steps {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px 56px;
}

.steps h2, .faq h2 {
  font-size: 12px;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--fg-faint);
  text-transform: uppercase;
  margin: 0 0 24px;
  text-align: center;
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.step {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease;
}
.step:hover { border-color: var(--border-strong); }

.step-num {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
}

.step-icon { color: var(--fg); margin-bottom: 14px; }

.step h3 { margin: 0 0 8px; font-size: 15px; font-weight: 700; }
.step p { margin: 0; font-size: 13px; color: var(--fg-dim); }
.step code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--fg);
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 3px 8px;
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.copy-chip:hover { border-color: var(--fg-dim); background: #1a1a1a; }
.copy-chip svg { color: var(--fg-dim); flex-shrink: 0; }

.steps-footnote {
  margin: 24px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--fg-faint);
}

/* ---- FAQ ---- */
.faq { max-width: var(--max); margin: 0 auto; padding: 0 20px 64px; }

.faq-list { display: flex; flex-direction: column; gap: 8px; }

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 4px;
}

.faq-item summary {
  padding: 12px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  list-style: none;
  color: var(--fg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-family: var(--mono);
  color: var(--fg-faint);
  font-size: 16px;
  line-height: 1;
}
.faq-item[open] summary::after { content: '−'; }

.faq-item p {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 13px;
  color: var(--fg-dim);
}
.faq-item code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--fg);
}

/* ---- Footer ---- */
.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 20px 40px;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
}
.footer .dot { opacity: 0.5; }

/* ---- Toast ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: var(--fg);
  color: #000;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---- Responsive ---- */
@media (max-width: 560px) {
  .step-list { grid-template-columns: 1fr; }
  .cta-row { flex-direction: column; }
  .btn-primary, .btn-ghost { width: 100%; }
}