:root {
  --admin-ink: #17323c;
  --admin-muted: #6b8088;
  --admin-cyan: #05aac5;
  --admin-deep: #047f99;
  --admin-border: rgba(7, 151, 177, 0.22);
  --admin-danger: #b44848;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: #edf8fa; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--admin-ink);
  background:
    linear-gradient(90deg, rgba(250, 253, 253, .98), rgba(240, 250, 251, .82)),
    url("art-glass-facade.png") center / cover fixed;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

button, input, textarea { font: inherit; }

.admin-shell {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 42px 0 60px;
}

.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}

.admin-brand { display: flex; flex-direction: column; gap: 7px; }
.admin-brand strong { font-size: clamp(25px, 3vw, 42px); letter-spacing: -.03em; }
.admin-brand span { color: var(--admin-deep); font-size: 12px; letter-spacing: .24em; }

.top-actions { display: flex; gap: 10px; align-items: center; }

.text-link, .logout-button {
  display: inline-flex;
  min-height: 42px;
  padding: 0 15px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--admin-border);
  border-radius: 12px;
  color: #31525d;
  background: rgba(255,255,255,.76);
  text-decoration: none;
  cursor: pointer;
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 18px;
}

.auth-card, .panel {
  border: 1px solid var(--admin-border);
  border-radius: 24px;
  background: rgba(255,255,255,.86);
  box-shadow: 0 28px 70px rgba(22, 92, 105, .14);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.auth-card { width: min(460px, 100%); padding: 34px; }
.auth-mark { width: 54px; height: 5px; margin-bottom: 26px; border-radius: 99px; background: linear-gradient(90deg, var(--admin-cyan), #66d9e2); }
.auth-card h1 { margin: 0; font-size: 30px; }
.auth-card .intro { margin: 12px 0 27px; color: var(--admin-muted); line-height: 1.75; }

.field { display: grid; gap: 8px; margin-bottom: 17px; }
.field label { color: #36545e; font-size: 13px; font-weight: 700; }

.field input, .field textarea {
  width: 100%;
  border: 1px solid rgba(21, 130, 151, .2);
  border-radius: 12px;
  outline: none;
  color: #17323c;
  background: rgba(249,253,253,.94);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.field input { height: 46px; padding: 0 13px; }
.field textarea { min-height: 72px; padding: 11px 13px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--admin-cyan); box-shadow: 0 0 0 4px rgba(4, 173, 199, .1); }

.primary-button {
  width: 100%;
  height: 48px;
  border: 0;
  border-radius: 13px;
  color: white;
  background: linear-gradient(135deg, #078ba6, #08bad0);
  box-shadow: 0 13px 26px rgba(3, 142, 168, .24);
  font-weight: 700;
  cursor: pointer;
}

.notice, .errors {
  margin: 0 0 18px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.65;
}
.notice { color: #196b5f; background: #e6f7f1; }
.errors { color: #923f3f; background: #fff0ef; }
.errors ul { margin: 0; padding-left: 20px; }

.panel { padding: clamp(22px, 3vw, 34px); margin-bottom: 22px; }
.panel-heading { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 24px; }
.panel-heading h2 { margin: 0; font-size: 22px; }
.panel-heading p { margin: 7px 0 0; color: var(--admin-muted); font-size: 13px; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; }
.span-2 { grid-column: 1 / -1; }

.cards-editor { display: grid; gap: 15px; }
.card-editor {
  padding: 19px;
  border: 1px solid rgba(18, 148, 172, .17);
  border-radius: 17px;
  background: rgba(238, 250, 251, .62);
}
.card-editor-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 15px; }
.card-editor-head strong { font-size: 16px; }
.card-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

.switch { display: inline-flex; align-items: center; gap: 8px; color: #31545e; font-size: 13px; font-weight: 700; }
.switch input { width: 18px; height: 18px; accent-color: var(--admin-cyan); }

.save-row { display: flex; justify-content: flex-end; margin-top: 7px; }
.save-row .primary-button { width: auto; min-width: 150px; padding: 0 24px; }
.help { margin: 7px 0 0; color: var(--admin-muted); font-size: 12px; line-height: 1.65; }

@media (max-width: 720px) {
  .admin-shell { width: min(100% - 24px, 1180px); padding-top: 24px; }
  .admin-topbar, .panel-heading { align-items: flex-start; flex-direction: column; }
  .form-grid, .card-fields { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .auth-card { padding: 27px 22px; }
  .top-actions { width: 100%; }
  .text-link, .logout-button { flex: 1; }
}