:root {
  --bg: #0f1420;
  --card: #1a2130;
  --card2: #222b3e;
  --line: #2e3a52;
  --text: #e8ecf5;
  --muted: #8fa0bd;
  --accent: #4f8cff;
  --good: #2ecc8f;
  --warn: #f5a623;
  --bad: #ff5d5d;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.topbar { text-align: center; padding: 34px 16px 6px; }
.brand { font-size: 26px; font-weight: 700; }
.brand span { color: var(--accent); }
.sub { color: var(--muted); margin-top: 8px; font-size: 14px; }

main { width: min(880px, 94vw); padding: 18px 0 30px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 16px;
}

.dropzone {
  border: 2px dashed var(--line);
  border-radius: 12px;
  padding: 42px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: var(--card2); }
.dz-icon { font-size: 40px; }
.dz-text { margin-top: 10px; font-size: 16px; }
.dz-text .link { color: var(--accent); text-decoration: underline; }
.dz-hint { margin-top: 8px; color: var(--muted); font-size: 12px; }

.file-badge {
  display: flex; align-items: center; gap: 12px;
  background: var(--card2); border-radius: 10px; padding: 12px 16px; margin-top: 12px;
}
.fb-name { font-weight: 600; word-break: break-all; }
.fb-size { color: var(--muted); font-size: 13px; white-space: nowrap; }
.btn-ghost {
  margin-left: auto; background: transparent; color: var(--muted);
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; cursor: pointer;
}
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }

.opt-title { font-weight: 700; margin-bottom: 12px; }
.opt-grid { display: flex; flex-direction: column; gap: 14px; }
.opt { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.opt-label { width: 280px; font-size: 14px; color: var(--text); }
.opt-label em { color: var(--muted); font-style: normal; font-size: 12px; }
.opt-label .req { color: var(--bad); font-weight: 700; }
.auto-hint { color: var(--muted); font-size: 13px; }
.opt input.invalid { border-color: var(--bad) !important; }
.opt input[type=text], .opt select {
  background: var(--card2); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; flex: 1; min-width: 180px;
}
.opt input[type=range] { flex: 1; min-width: 160px; accent-color: var(--accent); }
.range-val { color: var(--accent); font-weight: 700; min-width: 44px; text-align: right; }

.actions { display: flex; gap: 12px; justify-content: center; margin: 4px 0 18px; }
.btn {
  background: var(--card2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 26px; font-size: 15px; cursor: pointer;
  transition: transform .1s, filter .1s;
}
.btn:hover:not(:disabled) { filter: brightness(1.15); }
.btn:active:not(:disabled) { transform: scale(.98); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.progress { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--muted); padding: 12px; }
.spinner {
  width: 18px; height: 18px; border: 3px solid var(--line);
  border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.report-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .report-grid { grid-template-columns: 1fr; } }
.report-card h3 { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 16px; }
.risk-badge { font-size: 13px; font-weight: 700; border-radius: 999px; padding: 3px 12px; }
.risk-badge.正常 { background: rgba(46,204,143,.15); color: var(--good); }
.risk-badge.中 { background: rgba(245,166,35,.15); color: var(--warn); }
.risk-badge.高 { background: rgba(255,93,93,.15); color: var(--bad); }
.risk-badge.— { background: var(--card2); color: var(--muted); }

.report-body { font-size: 13.5px; }
.kv { display: flex; justify-content: space-between; gap: 8px; padding: 5px 0; border-bottom: 1px dashed var(--line); }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--muted); }
.kv .v { font-weight: 600; text-align: right; word-break: break-all; }
.kv .v.ok { color: var(--good); }
.kv .v.bad { color: var(--bad); }
.kv .v.warn { color: var(--warn); }
.flag-list { margin-top: 6px; }
.flag { padding: 4px 8px; border-radius: 6px; margin: 4px 0; font-size: 13px; }
.flag.致命, .flag.高 { background: rgba(255,93,93,.1); color: var(--bad); }
.flag.中 { background: rgba(245,166,35,.1); color: var(--warn); }

.download-card { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.dl-name { font-weight: 700; word-break: break-all; flex: 1; }
.download-card a { text-decoration: none; }
.save-info { flex: 1; min-width: 240px; }
.save-info > div:first-child { margin-bottom: 4px; }
.save-times { color: var(--good); font-size: 13px; margin-top: 4px; }

/* ---------------- 自定义日期时间控件 ---------------- */
.dt-widget {
  flex: 1; min-width: 260px;
  display: flex; align-items: center; gap: 8px;
  background: var(--card2); border: 1px solid var(--line);
  border-radius: 10px; padding: 6px 8px;
  transition: border-color .15s;
}
.dt-widget:focus-within { border-color: var(--accent); }
.dt-date {
  flex: 1; text-align: left;
  display: flex; align-items: center; gap: 6px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px; padding: 6px 10px; cursor: pointer; border-radius: 8px;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.dt-date:hover { border-color: var(--accent); background: rgba(79,140,255,.12); }
.dt-date:active { box-shadow: inset 0 1px 3px rgba(0,0,0,.3); }
.dt-date:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.dt-date-icon { font-size: 14px; }
.dt-date-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dt-date-text.empty { color: var(--muted); }
.dt-date.has-date .dt-date-text { color: var(--accent); font-weight: 600; }
.dt-date-chev { margin-left: auto; color: var(--muted); font-size: 10px; }
.dt-time { display: flex; align-items: center; gap: 4px; }
.dt-sel {
  background: var(--card); border: 1px solid var(--line); color: var(--text);
  border-radius: 6px; padding: 5px 4px; font-size: 13.5px; cursor: pointer;
}
.dt-sel:focus { border-color: var(--accent); outline: none; }
.dt-colon { color: var(--muted); font-weight: 700; }
.dt-clear {
  background: transparent; border: none; color: var(--muted);
  font-size: 13px; cursor: pointer; padding: 6px 8px; border-radius: 6px;
}
.dt-clear:hover { color: var(--bad); background: rgba(255,93,93,.1); }

.cal-popup {
  position: fixed; z-index: 99;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px; width: 268px;
  box-shadow: 0 12px 32px rgba(0,0,0,.5);
  animation: calIn .12s ease;
}
@keyframes calIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.cal-title { font-weight: 700; font-size: 14px; }
.cal-nav {
  background: var(--card2); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; width: 28px; height: 28px; cursor: pointer; font-size: 15px;
}
.cal-nav:hover { border-color: var(--accent); color: var(--accent); }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; }
.cal-dow { text-align: center; color: var(--muted); font-size: 11.5px; padding: 3px 0; }
.cal-day {
  background: transparent; border: none; color: var(--text);
  border-radius: 8px; height: 30px; font-size: 13px; cursor: pointer;
}
.cal-day.empty { cursor: default; }
.cal-day:hover:not(.empty) { background: var(--card2); }
.cal-day.today { box-shadow: inset 0 0 0 1px var(--accent); }
.cal-day.selected { background: var(--accent); color: #fff; font-weight: 700; }
.cal-foot { margin-top: 8px; display: flex; justify-content: flex-end; }
.cal-today {
  background: transparent; border: 1px solid var(--line); color: var(--accent);
  border-radius: 8px; padding: 4px 12px; font-size: 12.5px; cursor: pointer;
}
.cal-today:hover { border-color: var(--accent); }

footer { color: var(--muted); font-size: 12px; text-align: center; padding: 8px 16px 26px; }
.hidden { display: none !important; }