:root {
  --bg: #0b0f14;
  --card: #121822;
  --border: #263142;
  --text: #e6edf3;
  --muted: #9fb1c5;
  --primary: #2f81f7;
  --primary-600: #1f6fe3;
  --danger: #ff6b6b;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Microsoft Yahei', 'PingFang SC', sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, #142034 0%, var(--bg) 60%) fixed;
}

.app { max-width: 900px; margin: 32px auto; padding: 0 16px; }
.app__header { display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.app__header h1 { font-size: 24px; font-weight: 700; margin: 0; letter-spacing: 0.5px; }

.card {
  background: linear-gradient(180deg, #101722 0%, #0d1520 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.03);
}
.card h2 { margin: 0 0 8px; font-size: 18px; }

.muted { color: var(--muted); font-size: 14px; }
.msg { margin: 8px 0 0; font-size: 14px; opacity: 0.95; }
.msg.error { color: var(--danger); }
.msg.ok { color: #4fd1c5; }

.gate__form { display: flex; gap: 8px; margin-top: 12px; }
input[type="password"], textarea {
  width: 100%;
  background: #0b121c;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
textarea { resize: vertical; min-height: 100px; line-height: 1.5; }

.actions { display: flex; gap: 8px; margin-top: 12px; }

.btn {
  background: #121a27;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
.btn:hover { background: #152133; }
.btn.primary { background: var(--primary); border-color: transparent; color: white; }
.btn.primary:hover { background: var(--primary-600); }
.btn.small { padding: 6px 10px; font-size: 13px; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

.field { display: grid; grid-template-columns: 100px 1fr; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px dashed var(--border); }
.field:first-of-type { border-top: none; }
.label { color: var(--muted); font-size: 14px; }
.value { min-height: 24px; }
.row { display: flex; align-items: center; gap: 8px; }
.spacer { flex: 1; }

a { color: #7dc2ff; text-decoration: none; }
a:hover { text-decoration: underline; }

.preview { margin-top: 12px; border-top: 1px dashed var(--border); padding-top: 12px; }
.preview img { display: block; max-width: 100%; max-height: 380px; border-radius: 10px; border: 1px solid var(--border); }

#extract-msg, #result-msg { word-break: break-all; }