/* =========================================================
   后台样式 — 紧凑、信息密度高、保持设计一致性
   ========================================================= */

.admin {
  display: grid; grid-template-columns: 220px 1fr;
  min-height: 100vh;
  background: var(--c-bg);
}
.admin__nav {
  background: var(--c-ink);
  color: rgba(255,255,255,0.78);
  padding: var(--s-6) var(--s-4);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}
.admin__brand { display: flex; align-items: center; gap: 0.6rem; color: #fff; margin-bottom: var(--s-8); }
.admin__brand img { height: 28px; filter: brightness(0) invert(1); }
.admin__brand strong { font-size: var(--fs-sm); letter-spacing: 0.05em; }
.admin__brand small { display: block; font-family: var(--font-mono); font-size: 0.65rem; color: rgba(255,255,255,0.4); margin-top: 2px; letter-spacing: 0.15em; }

.admin__nav button {
  display: flex; align-items: center; gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.8rem;
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.7);
  border-radius: var(--r-sm);
  text-align: left;
  transition: all var(--t-fast);
}
.admin__nav button:hover { background: rgba(255,255,255,0.06); color: #fff; }
.admin__nav button.is-active { background: #fff; color: var(--c-ink); }
.admin__nav button .num {
  font-family: var(--font-mono); font-size: 0.7rem;
  color: rgba(255,255,255,0.4); margin-left: auto;
}
.admin__nav button.is-active .num { color: var(--c-mute); }
.admin__nav .spacer { flex: 1; }
.admin__nav .exit { color: rgba(255,255,255,0.5); font-size: var(--fs-xs); }

.admin__main { padding: var(--s-8) var(--s-8) var(--s-16); max-width: 1000px; }
.admin__head { display: flex; justify-content: space-between; align-items: end; margin-bottom: var(--s-8); }
.admin__head h1 { font-size: var(--fs-3xl); font-weight: 400; }
.admin__head p { color: var(--c-mute); font-size: var(--fs-sm); margin-top: 0.3rem; }
.admin__head .actions { display: flex; gap: var(--s-2); }

.panel {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--s-6);
  margin-bottom: var(--s-4);
}
.panel__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--s-4); }
.panel__head h2 { font-size: var(--fs-xl); font-weight: 500; }
.panel__head .meta { color: var(--c-mute); font-size: var(--fs-xs); font-family: var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; }

.list { display: flex; flex-direction: column; }
.list__item {
  display: grid; grid-template-columns: 1fr auto auto; gap: var(--s-3);
  padding: var(--s-3) 0;
  border-top: 1px solid var(--c-line);
  align-items: center;
}
.list__item:first-child { border-top: 0; }
.list__item .title { font-weight: 500; }
.list__item .desc { color: var(--c-mute); font-size: var(--fs-sm); }
.list__item .tag { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-primary-2); }

.btn--icon {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-line-2);
  border-radius: 999px;
  color: var(--c-mute);
  transition: all var(--t-fast);
}
.btn--icon:hover { color: var(--c-ink); border-color: var(--c-ink); }
.btn--icon.is-danger:hover { color: var(--c-accent); border-color: var(--c-accent); }

/* —— 表单 ——————————————————————— */
.form-grid { display: grid; gap: var(--s-4); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-3); }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.field input, .field textarea, .field select {
  width: 100%; padding: 0.55rem 0.8rem;
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-sm);
  background: var(--c-bg);
  font-size: var(--fs-sm);
}
.field textarea { resize: vertical; min-height: 140px; line-height: 1.65; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--c-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-primary) 18%, transparent);
  background: var(--c-surface);
}
.field label {
  display: block; font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--c-mute); margin-bottom: 0.35rem;
}

.media-upload {
  display: grid; grid-template-columns: 1fr auto; gap: var(--s-3);
  align-items: end;
}
.media-preview {
  aspect-ratio: 16/9;
  background: var(--c-bg-alt);
  border: 1px dashed var(--c-line-2);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-mute);
  font-size: var(--fs-xs);
  overflow: hidden;
}
.media-preview img, .media-preview video { width: 100%; height: 100%; object-fit: cover; }

.toggle {
  display: inline-flex; align-items: center; gap: 0.5rem;
  cursor: pointer; user-select: none;
}
.toggle input { display: none; }
.toggle .switch {
  width: 36px; height: 20px;
  background: var(--c-line-2);
  border-radius: 999px;
  position: relative;
  transition: all var(--t-fast);
}
.toggle .switch::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff;
  transition: all var(--t-fast);
}
.toggle input:checked + .switch { background: var(--c-primary); }
.toggle input:checked + .switch::after { left: 18px; }

/* —— 登录页 ——————————————————————— */
.login {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: var(--s-6);
  background:
    radial-gradient(circle at 80% 20%, var(--c-tint) 0%, transparent 50%),
    var(--c-bg);
}
.login__card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--s-12) var(--s-8);
  max-width: 380px; width: 100%;
  box-shadow: var(--shadow-2);
}
.login__brand { display: flex; align-items: center; gap: 0.7rem; margin-bottom: var(--s-6); }
.login__brand img { height: 32px; }
.login h1 { font-size: var(--fs-2xl); font-weight: 400; margin-bottom: 0.3rem; }
.login .sub { color: var(--c-mute); font-size: var(--fs-sm); margin-bottom: var(--s-6); }
.login__msg { font-size: var(--fs-sm); color: var(--c-accent); margin-top: var(--s-3); min-height: 1.2em; }

/* —— 提示 ——————————————————————— */
.toast {
  position: fixed; bottom: 20px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--c-ink); color: #fff;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  font-size: var(--fs-sm);
  opacity: 0;
  transition: all var(--t-med);
  z-index: 200;
  pointer-events: none;
}
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 社区图片卡片编辑器 */
.community-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-4); }
@media (max-width: 920px) { .community-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .community-grid { grid-template-columns: 1fr; } }

.community-card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--s-4);
  display: flex; flex-direction: column; gap: var(--s-3);
}
.community-card__preview {
  aspect-ratio: 16/10;
  background: var(--c-bg-alt);
  border: 1px dashed var(--c-line-2);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  color: var(--c-mute); font-size: var(--fs-xs);
  position: relative;
}
.community-card__preview img { width: 100%; height: 100%; object-fit: cover; }
.community-card__preview .remove {
  position: absolute; top: 6px; right: 6px;
  width: 26px; height: 26px; border-radius: 50%;
  background: rgba(255,255,255,0.92); border: 1px solid var(--c-line-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; line-height: 1; color: var(--c-accent); cursor: pointer;
}
.community-card__empty {
  display: flex; flex-direction: column; align-items: center; gap: var(--s-2);
  cursor: pointer;
}
.community-card__empty input { display: none; }
.community-card__empty .hint {
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-mute);
}

.community-card .field { margin-bottom: 0; }
.community-card .field label { margin-bottom: 0.25rem; }
.community-card .field input {
  width: 100%; padding: 0.45rem 0.65rem;
  border: 1px solid var(--c-line-2); border-radius: var(--r-sm); font-size: var(--fs-sm); background: var(--c-bg);
}
.community-card .field input:focus { outline: none; border-color: var(--c-primary); background: var(--c-surface); }
.community-card__actions { display: flex; justify-content: flex-end; }
.community-card__actions .btn { padding: 0.5rem 1rem; font-size: var(--fs-xs); }