:root {
  --bg: #0f1420;
  --bg-card: #161d2e;
  --bg-card-2: #1d2540;
  --border: #2a3350;
  --text: #e8ecf7;
  --text-muted: #98a2bf;
  --accent: #6ea8fe;
  --accent-2: #7ee0c2;
  --danger: #ff8787;
  --ok: #7ee0c2;
  --radius: 12px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fb;
    --bg-card: #ffffff;
    --bg-card-2: #eef1fa;
    --border: #dde3f0;
    --text: #1a2033;
    --text-muted: #5b6480;
    --accent: #3568d4;
    --accent-2: #1f9c78;
    --danger: #c0392b;
    --ok: #1f9c78;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo span.emoji { font-size: 1.4rem; }

nav.main-nav { display: flex; gap: 6px; flex-wrap: wrap; }
nav.main-nav a {
  text-decoration: none;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}
nav.main-nav a:hover { background: var(--bg-card-2); color: var(--text); }
nav.main-nav a.active { background: var(--accent); color: #0b1220; font-weight: 600; }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

h1 { font-size: 1.8rem; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 28px 0 12px; }
p.lead { color: var(--text-muted); margin-top: 0; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: transform 0.15s, border-color 0.15s;
}
.feature-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.feature-card .icon { font-size: 2rem; margin-bottom: 10px; display: block; }
.feature-card h3 { margin: 0 0 6px; font-size: 1.1rem; }
.feature-card p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

label {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 14px 0 6px;
}
label:first-child { margin-top: 0; }

select, input[type="text"], input[type="number"], textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card-2);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}
select:focus, input:focus, textarea:focus { outline: 2px solid var(--accent); }
textarea { resize: vertical; min-height: 90px; }

.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }

button, .btn {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  background: var(--accent);
  color: #0b1220;
  transition: opacity 0.15s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover, .btn:hover { opacity: 0.88; }
button.secondary, .btn.secondary {
  background: var(--bg-card-2);
  color: var(--text);
  border: 1px solid var(--border);
}
button.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

.output-box {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  font-family: 'Consolas', 'Courier New', monospace;
  word-break: break-word;
  white-space: pre-wrap;
  min-height: 40px;
  font-size: 0.95rem;
}

.hint-box {
  background: var(--bg-card-2);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 10px 14px;
  margin-top: 8px;
  font-size: 0.92rem;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.badge.ok { color: var(--ok); border-color: var(--ok); }
.badge.danger { color: var(--danger); border-color: var(--danger); }

.feedback { margin-top: 12px; padding: 12px 14px; border-radius: 8px; font-weight: 600; }
.feedback.ok { background: rgba(126,224,194,0.12); color: var(--ok); border: 1px solid var(--ok); }
.feedback.danger { background: rgba(255,135,135,0.12); color: var(--danger); border: 1px solid var(--danger); }

.share-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.share-buttons a.btn { background: var(--bg-card-2); color: var(--text); border: 1px solid var(--border); }
.share-buttons a.whatsapp:hover { color: #25D366; border-color: #25D366; }
.share-buttons a.email:hover { color: var(--accent); border-color: var(--accent); }

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 30px 20px;
}

.note { font-size: 0.85rem; color: var(--text-muted); margin-top: 6px; }

.hidden { display: none !important; }

.methods-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 0.9rem; }
.methods-table th, .methods-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.methods-table th { color: var(--text-muted); font-weight: 600; }