:root {
  --ink: #15241f;
  --muted: #5a6d66;
  --accent: #0d6e63;
  --accent-2: #0a544c;
  --line: rgba(21, 36, 31, 0.12);
  --danger: #b42318;
  --bg: #edf1f0;
  --surface: rgba(255, 255, 255, 0.86);
  --font-display: "DM Serif Display", "Songti SC", Georgia, serif;
  --font-body: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: linear-gradient(165deg, #edf1f0, #dfe8e5);
}

a { color: var(--accent-2); }

.admin-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

@media (max-width: 860px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-side {
    position: sticky;
    top: 0;
    z-index: 10;
    padding: 0.7rem 0.7rem 0.55rem;
    padding-top: calc(0.7rem + env(safe-area-inset-top, 0px));
  }
  .admin-brand {
    padding: 0.2rem 0.35rem 0.55rem;
    font-size: 1.2rem;
  }
  .admin-nav {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.2rem;
  }
  .admin-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.75rem;
    font-size: 0.86rem;
  }
  .admin-main {
    padding: 0.9rem 0.8rem calc(1.2rem + env(safe-area-inset-bottom, 0px));
  }
  .admin-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .admin-top h1 { font-size: 1.4rem; }
  .card { padding: 0.9rem; border-radius: 14px; }
  .btn, .btn-primary {
    min-height: 44px;
    width: 100%;
  }
  .actions { display: grid; grid-template-columns: 1fr; }
  .table-wrap { margin: 0 -0.2rem; }
  table { min-width: 560px; }
}

.admin-side {
  background: #12352f;
  color: #e7f7f3;
  padding: 1.1rem 0.9rem;
}

.admin-brand {
  display: block;
  text-decoration: none;
  color: inherit;
  font-family: var(--font-display);
  font-size: 1.45rem;
  padding: 0.4rem 0.55rem 1rem;
}

.admin-nav { display: grid; gap: 0.25rem; }
.admin-nav a {
  text-decoration: none;
  color: rgba(231, 247, 243, 0.82);
  padding: 0.65rem 0.7rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
}
.admin-nav a:hover,
.admin-nav a.is-active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.admin-main { padding: 1.25rem; }
.admin-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.admin-top h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.7rem;
}
.admin-user { color: var(--muted); font-size: 0.9rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.1rem;
  box-shadow: 0 14px 34px rgba(21, 36, 31, 0.07);
  margin-bottom: 1rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}
@media (max-width: 720px) {
  .stats { grid-template-columns: 1fr; }
}
.stat {
  padding: 1rem;
  border-radius: 14px;
  background: #f7faf8;
  border: 1px solid var(--line);
}
.stat strong {
  display: block;
  font-size: 1.6rem;
  margin-top: 0.2rem;
}
.stat span { color: var(--muted); font-size: 0.88rem; }

.table-wrap { overflow: auto; }
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  text-align: left;
  padding: 0.7rem 0.45rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  vertical-align: middle;
}
th { color: var(--muted); font-weight: 600; }

input[type="text"],
input[type="password"],
input[type="number"],
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f7faf8;
  padding: 0.65rem 0.75rem;
  font: inherit;
}

.field { margin-bottom: 0.85rem; }
.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.62rem 0.9rem;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  border: 0;
  background: linear-gradient(180deg, #128577, var(--accent-2));
  color: #f4fffc;
}
.btn-danger {
  border-color: rgba(180, 35, 24, 0.3);
  color: var(--danger);
}

.alert {
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  margin-bottom: 0.9rem;
  font-size: 0.92rem;
}
.alert-ok {
  background: rgba(13, 110, 99, 0.1);
  color: var(--accent-2);
}
.alert-err {
  background: rgba(180, 35, 24, 0.08);
  color: var(--danger);
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}
.login-card {
  width: min(420px, 100%);
}
.login-card h1 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 400;
}
.login-card .sub {
  margin: 0 0 1rem;
  color: var(--muted);
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.muted { color: var(--muted); font-size: 0.88rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.tool-tdk-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f7faf8;
  padding: 0.9rem 1rem;
  margin-bottom: 0.75rem;
}

.tool-tdk-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.sort-inline {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.86rem;
  color: var(--muted);
}

.sort-inline input {
  width: 88px;
  padding: 0.4rem 0.5rem;
}

.tdk-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem 0.75rem;
}

.tdk-grid .field { margin-bottom: 0; }
.tdk-grid .field-span { grid-column: 1 / -1; }

@media (max-width: 720px) {
  .tdk-grid { grid-template-columns: 1fr; }
  .sort-inline { margin-left: 0; }
}

.cover-source {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0.5rem 0 0.85rem;
}

.cover-source-option {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #f7faf8;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 600;
}

.cover-source-option input {
  accent-color: var(--accent);
}

.cover-panel {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.cover-panel[hidden] {
  display: none !important;
}

.cover-preview {
  display: grid;
  gap: 0.45rem;
  margin: 0.75rem 0;
}

.cover-preview img {
  width: 100%;
  max-width: 420px;
  max-height: 180px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #edf1f0;
}

.cover-clear {
  margin-top: 0.35rem;
  width: fit-content;
}

.support-settings {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.75rem;
  padding: 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #f7faf8;
}