:root {
  --bg: #0a0611;
  --surface: #15101f;
  --surface-alt: #1d1730;
  --stroke: #2a2340;
  --primary: #a855f7;
  --primary-deep: #7c3aed;
  --pink: #ec4899;
  --amber: #f5b54a;
  --green: #34d399;
  --danger: #ef6a6a;
  --text: #f3effa;
  --text-2: #9b91ae;
  --text-3: #6b6280;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.hidden { display: none !important; }
.muted { color: var(--text-2); }
.hint { color: var(--text-3); font-size: 12px; font-weight: 400; }

h1 { font-size: 24px; font-weight: 500; margin: 0 0 4px; }
h2 { font-size: 15px; font-weight: 500; margin: 0 0 12px; }

/* ------------------------------------------------------------- thương hiệu */
.brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px; letter-spacing: 2.5px;
}
.brand-mark {
  width: 28px; height: 28px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
}

/* ---------------------------------------------------------------- đăng nhập */
.login-wrap { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.login-card {
  width: 340px; padding: 28px;
  background: var(--surface); border: 1px solid var(--stroke); border-radius: 18px;
  display: flex; flex-direction: column; gap: 14px;
}

/* ------------------------------------------------------------------ layout */
.layout { display: grid; grid-template-columns: 230px 1fr; min-height: 100vh; }

.sidebar {
  background: var(--surface); border-right: 1px solid var(--stroke);
  padding: 22px 16px; display: flex; flex-direction: column; gap: 22px;
}
.sidebar nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }

.nav-item {
  text-align: left; padding: 10px 12px; border-radius: 10px;
  background: transparent; border: 0; color: var(--text-2);
  font-size: 14px; cursor: pointer;
}
.nav-item:hover { background: var(--surface-alt); color: var(--text); }
.nav-item.active { background: var(--primary-deep); color: #fff; }

main { padding: 30px 34px; overflow-y: auto; }
.tab { display: none; }
.tab.active { display: block; }

/* ---------------------------------------------------------------- thành phần */
.card {
  background: var(--surface); border: 1px solid var(--stroke);
  border-radius: 16px; padding: 20px;
  display: flex; flex-direction: column; gap: 14px;
}
.card-head { display: flex; align-items: baseline; justify-content: space-between; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
@media (max-width: 1080px) { .split { grid-template-columns: 1fr; } }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > label { flex: 1; min-width: 120px; }
.row.actions { align-items: center; justify-content: flex-end; }
.row.checks { gap: 20px; }

label {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 13px; font-weight: 500; color: var(--text-2);
}
label.check {
  flex-direction: row; align-items: center; gap: 8px; flex: 0 0 auto;
  cursor: pointer;
}

input, select, textarea {
  background: var(--surface-alt); border: 1px solid var(--stroke);
  border-radius: 10px; padding: 10px 12px;
  color: var(--text); font: inherit; width: 100%;
}
input[type="checkbox"] { width: auto; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }
textarea { resize: vertical; }
.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }

button {
  font: inherit; cursor: pointer; border-radius: 10px;
  padding: 10px 16px; border: 1px solid transparent;
}
button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff; font-weight: 500;
}
button.primary:disabled { opacity: .55; cursor: progress; }
button.ghost { background: transparent; border-color: var(--stroke); color: var(--text-2); }
button.ghost:hover { color: var(--text); border-color: var(--primary); }
button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }

/* ------------------------------------------------------------ trạng thái */
.status { margin: 0; font-size: 13px; white-space: pre-wrap; }
.status.ok { color: var(--green); }
.status.err { color: var(--danger); }
.error { color: var(--danger); font-size: 13px; margin: 0; }
.notice {
  margin-top: 18px; padding: 14px 16px; border-radius: 12px;
  border: 1px solid var(--amber); color: var(--amber); font-size: 13px;
}

/* ------------------------------------------------------------ số liệu */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px; margin-top: 20px;
}
.stat {
  background: var(--surface); border: 1px solid var(--stroke);
  border-radius: 14px; padding: 16px;
}
.stat b { display: block; font-size: 24px; font-weight: 500; }
.stat span { color: var(--text-2); font-size: 12px; }

/* ------------------------------------------------------------ xem trước */
.preview {
  background: var(--surface-alt); border: 1px solid var(--stroke);
  border-radius: 12px; padding: 16px; min-height: 260px; max-height: 460px;
  overflow-y: auto; display: flex; flex-direction: column; gap: 10px;
}
.preview.empty { align-items: center; justify-content: center; color: var(--text-3); }
.preview-head { border-bottom: 1px solid var(--stroke); padding-bottom: 10px; }
.preview-head b { font-size: 16px; }
.ep-title {
  font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--primary); margin-top: 8px;
}
.bubble {
  max-width: 78%; padding: 9px 13px; border-radius: 14px; font-size: 13px;
  background: #241e36;
}
.bubble.out { align-self: flex-end; background: #8b48e0; }
.bubble .who { display: block; font-size: 11px; color: var(--text-3); margin-bottom: 3px; }
.bubble.out .who { color: rgba(255,255,255,.7); }
.divider, .alert {
  align-self: center; font-size: 11px; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--text-3);
}
.alert { color: var(--danger); border: 1px solid var(--danger); border-radius: 8px; padding: 5px 10px; }
.media { font-size: 12px; color: var(--amber); border: 1px dashed var(--amber); border-radius: 10px; padding: 8px 12px; }
.choice {
  border: 1px solid var(--primary); border-radius: 12px; padding: 12px; font-size: 13px;
}
.choice b { color: var(--primary); }

.code-block {
  background: var(--surface-alt); border: 1px solid var(--stroke);
  border-radius: 12px; padding: 14px; font-size: 11.5px;
  max-height: 520px; overflow: auto; margin: 0; white-space: pre-wrap;
}

/* ------------------------------------------------------------ bảng truyện */
.table { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.trow {
  display: grid;
  grid-template-columns: minmax(160px, 2fr) 90px 80px 120px 160px;
  align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--stroke);
  border-radius: 12px; padding: 14px 16px;
}
@media (max-width: 760px) {
  .trow { grid-template-columns: 1fr 1fr; }
}
.trow > * { min-width: 0; }
.trow .title { font-weight: 500; }
.trow .title, .trow .sub { overflow-wrap: anywhere; }
.trow .sub { color: var(--text-3); font-size: 12px; }
.trow .acts { display: flex; gap: 8px; justify-content: flex-end; }
.pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 11px; letter-spacing: 1px; text-transform: uppercase;
}
.pill.on { background: rgba(52,211,153,.15); color: var(--green); }
.pill.off { background: rgba(155,145,174,.15); color: var(--text-2); }