:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a2e37;
  --text: #e7e9ee;
  --muted: #9aa1ac;
  --accent: #5b8def;
  --danger: #e5566d;
  --success: #3fb970;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 40px 16px;
}

.container {
  width: 100%;
  max-width: 720px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
}

.center {
  text-align: center;
}

h1 { font-size: 1.4rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 16px; }
p.muted, span.muted { color: var(--muted); font-size: 0.9rem; }

label { display: block; font-size: 0.85rem; color: var(--muted); margin: 14px 0 6px; }

input[type="text"], input[type="password"], input[type="number"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0f1115;
  color: var(--text);
  font-size: 1rem;
}

textarea {
  font-family: ui-monospace, monospace;
  resize: vertical;
}

.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

button, .btn {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
}

button.danger, .btn.danger { background: var(--danger); }
button.secondary, .btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }

.code-display {
  font-size: 2.6rem;
  letter-spacing: 0.15em;
  font-weight: 700;
  text-align: center;
  margin: 20px 0 8px;
  font-variant-numeric: tabular-nums;
}

.progress {
  height: 6px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 4px;
}
.progress > div {
  height: 100%;
  background: var(--accent);
  transition: width 1s linear;
}

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }
.flash.error { background: rgba(229,86,109,0.15); color: var(--danger); border: 1px solid var(--danger); }
.flash.success { background: rgba(63,185,112,0.15); color: var(--success); border: 1px solid var(--success); }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }

.badge { padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; }
.badge.ativa { background: rgba(63,185,112,0.15); color: var(--success); }
.badge.expirada { background: rgba(154,161,172,0.2); color: var(--muted); }
.badge.revogada { background: rgba(229,86,109,0.15); color: var(--danger); }

.top-nav { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.top-nav a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }

.key-reveal {
  background: #0f1115;
  border: 1px dashed var(--accent);
  border-radius: 8px;
  padding: 14px;
  font-family: ui-monospace, monospace;
  font-size: 1.05rem;
  word-break: break-all;
  margin: 10px 0;
}

form.inline { display: inline; }
.actions { display: flex; gap: 8px; align-items: center; }