:root {
  --bg: #0f1320;
  --panel: #181d2e;
  --card: #1f2538;
  --line: #2b3350;
  --text: #e7ebf5;
  --muted: #8b95b3;
  --primary: #3b6ef5;
  --primary-h: #4f7dff;
  --green: #2fb86b;
  --amber: #f0a83a;
  --red: #ef4f5b;
  --radius: 12px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  padding: 16px 24px 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.logo { font-size: 34px; }
h1 { font-size: 20px; margin: 0; }
.sub { margin: 0; color: var(--muted); font-size: 13px; }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab {
  background: none; border: none; color: var(--muted);
  padding: 10px 16px; cursor: pointer; font-size: 14px;
  border-bottom: 2px solid transparent; border-radius: 6px 6px 0 0;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--primary); }

main { padding: 24px; max-width: 1200px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
}
.card h2 { margin: 0 0 14px; font-size: 16px; }

textarea, select, input[type="text"], input[type="password"] {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  font-size: 14px; font-family: inherit;
}
textarea { resize: vertical; }
label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; }

.row { display: flex; align-items: center; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.controls { gap: 16px; }
.controls > div { flex: 1; min-width: 160px; }

button { font-family: inherit; }
.primary {
  background: var(--primary); color: #fff; border: none;
  padding: 12px 20px; border-radius: 8px; font-size: 15px; cursor: pointer;
  margin-top: 16px; width: 100%; font-weight: 600;
}
.primary:hover { background: var(--primary-h); }
.primary:disabled { opacity: .6; cursor: wait; }
.ghost {
  background: none; border: 1px solid var(--line); color: var(--muted);
  padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.ghost:hover { color: var(--text); }

.filelabel {
  display: inline-block; background: var(--bg); border: 1px dashed var(--line);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text);
  margin: 0;
}
.thumbs { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.thumb { position: relative; width: 90px; height: 90px; }
.thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.thumb-x {
  position: absolute; top: -6px; right: -6px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--red); color: #fff; border: none; cursor: pointer;
  font-size: 12px; line-height: 1; display: flex; align-items: center; justify-content: center;
}

.muted { color: var(--muted); font-size: 14px; }
.center { text-align: center; padding: 30px 0; }
.error { color: var(--red); font-size: 13px; margin-top: 10px; }
.ok { color: var(--green); font-size: 13px; margin-top: 10px; }

/* Kết quả */
.verdict-banner {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: 10px; margin-bottom: 16px; font-weight: 600;
}
.verdict-banner .icon { font-size: 24px; }
.v-violation { background: rgba(239,79,91,.15); border: 1px solid var(--red); color: #ffb3ba; }
.v-warning { background: rgba(240,168,58,.15); border: 1px solid var(--amber); color: #ffd89b; }
.v-safe { background: rgba(47,184,107,.15); border: 1px solid var(--green); color: #a8e9c5; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.b-high { background: var(--red); color: #fff; }
.b-medium { background: var(--amber); color: #1a1a1a; }
.b-low { background: #5566aa; color: #fff; }
.b-none { background: var(--green); color: #fff; }

.section-title { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; margin: 18px 0 8px; }
.violation-item {
  background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--red);
  border-radius: 8px; padding: 12px; margin-bottom: 10px;
}
.violation-item .vtitle { font-weight: 600; margin-bottom: 4px; }
.violation-item .vid { font-size: 11px; color: var(--muted); }
.violation-item .vreason { font-size: 13px; margin-top: 6px; }
.violation-item .vevidence { font-size: 12px; color: var(--amber); margin-top: 6px; font-style: italic; }

.variant {
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; margin-bottom: 10px; position: relative;
}
.variant .vlabel { font-size: 11px; color: var(--primary); font-weight: 600; margin-bottom: 6px; }
.variant .vtext { font-size: 14px; white-space: pre-wrap; }
.copybtn {
  position: absolute; top: 10px; right: 10px;
  background: var(--line); border: none; color: var(--text);
  padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 12px;
}
.copybtn:hover { background: var(--primary); }

.meta-line { font-size: 12px; color: var(--muted); margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); }

.feedback-row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.fbtn { border: 1px solid var(--line); background: var(--bg); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; }
.fbtn:hover { border-color: var(--primary); }
.fbtn.danger:hover { border-color: var(--red); color: #ffb3ba; }

/* Lịch sử */
.hist-item {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; margin-bottom: 10px;
}
.hist-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.hist-text { margin-top: 8px; font-size: 14px; }
.hist-meta { font-size: 12px; color: var(--muted); margin-top: 6px; }

/* Thống kê */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-box { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; text-align: center; }
.stat-box .num { font-size: 26px; font-weight: 700; }
.stat-box .lbl { font-size: 12px; color: var(--muted); margin-top: 4px; }
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.bar-row .name { width: 200px; font-size: 13px; }
.bar-track { flex: 1; background: var(--bg); border-radius: 6px; overflow: hidden; height: 22px; }
.bar-fill { background: var(--primary); height: 100%; }
.bar-row .val { width: 40px; text-align: right; font-size: 13px; }

/* Chính sách */
.search { margin-bottom: 16px; }
.policy-item { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-bottom: 10px; }
.policy-item .ptitle { font-weight: 600; }
.policy-item .pdesc { font-size: 13px; margin-top: 6px; }
.policy-item .pkw { font-size: 12px; color: var(--amber); margin-top: 6px; }
.policy-item .padv { font-size: 12px; color: var(--green); margin-top: 6px; }
.scope-tag { font-size: 10px; padding: 2px 7px; border-radius: 6px; background: var(--line); margin-left: 6px; }

#settingsForm .row { margin-bottom: 8px; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--green); color: #fff; padding: 10px 20px; border-radius: 8px;
  font-size: 14px; z-index: 100;
}

hr { border: none; border-top: 1px solid var(--line); margin: 20px 0; }
details summary { cursor: pointer; color: var(--muted); }
.help { font-size: 13px; color: var(--muted); }
.help code { color: var(--text); }
code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: 12px; }