:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --border: #334155;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", Helvetica, Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}
header {
  padding: 32px 24px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 26px; letter-spacing: 0.5px; }
header .subtitle { color: var(--muted); margin: 8px 0 0; font-size: 14px; }
header code { background: var(--panel-2); padding: 2px 6px; border-radius: 4px;
              font-size: 13px; color: var(--accent); }
main {
  max-width: 760px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  gap: 16px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
}
.card h2 { margin: 0 0 12px; font-size: 18px; }
.card h3 { margin: 16px 0 6px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.hidden { display: none !important; }

/* Upload */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 36px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  user-select: none;
}
.drop-zone:hover, .drop-zone.dragging {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
}
.drop-icon { font-size: 36px; }
.drop-text { font-size: 15px; }
.drop-hint { color: var(--muted); font-size: 12px; }
.drop-zone.has-file { border-style: solid; border-color: var(--ok); }

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

button, .btn-primary, .btn-secondary {
  font: inherit;
  background: var(--accent-strong);
  color: white;
  border: 0;
  padding: 8px 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: filter .12s;
}
button:hover:not(:disabled) { filter: brightness(1.1); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-secondary { background: var(--panel-2); color: var(--text); }
.btn-primary { display: inline-block; text-decoration: none; text-align: center; }
.status { font-size: 13px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }
.status.warn { color: var(--warn); }
.muted { color: var(--muted); }

/* Strategy grid */
.strategy-grid {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}
.strategy {
  display: flex;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
.strategy:has(input:checked) {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.07);
}
.strategy input { margin-top: 4px; }
.strategy-title { font-weight: 600; margin-bottom: 4px; }
.strategy-desc { color: var(--muted); font-size: 13px; }
.strategy-desc input[type=number] {
  width: 60px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 4px;
}
.strategy-desc details summary { cursor: pointer; color: var(--accent); }
.strategy-desc textarea {
  width: 100%;
  margin-top: 6px;
  min-height: 100px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px;
  padding: 6px;
}

/* Result */
.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
  margin: 6px 0 14px;
}
.summary > div {
  background: var(--panel-2);
  border-radius: 8px;
  padding: 10px 12px;
}
.summary .lbl { display: block; font-size: 12px; color: var(--muted); }
.summary .val { font-size: 16px; font-weight: 600; }

.password-box {
  background: linear-gradient(135deg, rgba(52,211,153,0.18), rgba(56,189,248,0.12));
  border: 1px solid rgba(52,211,153,0.4);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 14px;
}
.password-box .lbl { color: var(--ok); font-size: 13px; }
.password {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 6px 0 12px;
  flex-wrap: wrap;
}
.password code {
  font-size: 20px;
  background: rgba(0,0,0,0.3);
  padding: 6px 12px;
  border-radius: 6px;
  word-break: break-all;
  flex: 1;
  min-width: 200px;
}

.phases { list-style: none; padding: 0; margin: 0; }
.phases li {
  display: flex;
  justify-content: space-between;
  padding: 6px 10px;
  border-bottom: 1px dashed var(--border);
  font-size: 13px;
}
.phases li:last-child { border-bottom: 0; }
.phases .ok { color: var(--ok); }
.phases .miss { color: var(--muted); }

.log {
  background: #020617;
  color: var(--muted);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  max-height: 220px;
  overflow-y: auto;
  white-space: pre-wrap;
}

footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 12px;
}