:root {
  --bg: #0b0e14;
  --bg-soft: #11151f;
  --panel: rgba(255, 255, 255, .035);
  --panel-2: rgba(255, 255, 255, .06);
  --text: #e6e9ef;
  --muted: #8b93a7;
  --border: rgba(255, 255, 255, .09);
  --accent: #6c7bff;
  --accent-2: #22d3ee;
  --accent-soft: rgba(108, 123, 255, .14);
  --danger: #ff6b6b;
  --ok: #34d399;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --panel: #ffffff;
  --panel-2: #f1f3f9;
  --text: #1a1d29;
  --muted: #6b7288;
  --border: rgba(20, 25, 45, .1);
  --accent: #4f5ff0;
  --accent-2: #0891b2;
  --accent-soft: rgba(79, 95, 240, .1);
  --shadow: 0 8px 24px rgba(20, 25, 60, .08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(108, 123, 255, .18), transparent 60%),
    radial-gradient(760px 460px at 92% 4%, rgba(34, 211, 238, .13), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 64px;
}

.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: .3px; }

.logo .mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
  box-shadow: 0 6px 18px rgba(108, 123, 255, .4);
}

.nav { display: flex; gap: 4px; margin-left: 12px; }
.nav a { padding: 7px 13px; border-radius: 9px; color: var(--muted); font-size: 14.5px; transition: .18s; }
.nav a:hover, .nav a.active { color: var(--text); background: var(--panel-2); }

.header-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 14px; min-width: 210px; transition: .2s;
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-box input { background: none; border: none; outline: none; color: var(--text); width: 100%; font-size: 14px; }
.search-box input::placeholder { color: var(--muted); }

.icon-btn {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  cursor: pointer; font-size: 15px; transition: .18s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- hero ---------- */
.hero { padding: 54px 0 30px; }
.hero h1 {
  margin: 0 0 12px; font-size: 40px; line-height: 1.25; letter-spacing: -.5px;
  background: linear-gradient(120deg, var(--text) 20%, var(--accent) 55%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { margin: 0; color: var(--muted); font-size: 16.5px; max-width: 620px; }
.hero .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

.chip {
  padding: 5px 13px; border-radius: 999px; font-size: 13.5px;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); transition: .18s;
}
.chip:hover, .chip.on { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 1fr 296px; gap: 26px; padding-bottom: 40px; align-items: start; }

.post-list { display: flex; flex-direction: column; gap: 16px; }

.card {
  display: grid; grid-template-columns: 1fr; gap: 12px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; transition: .2s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: var(--shadow); }

.card-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.badge { padding: 3px 10px; border-radius: 7px; background: var(--accent-soft); color: var(--accent); font-size: 12.5px; font-weight: 600; }
.badge.pin { background: rgba(255, 176, 32, .14); color: #f0a92e; }
.badge.draft { background: rgba(255, 107, 107, .14); color: var(--danger); }

.card h2 { margin: 0; font-size: 21px; line-height: 1.45; letter-spacing: -.2px; }
.card h2 a:hover { color: var(--accent); }
.card .excerpt { margin: 0; color: var(--muted); font-size: 15px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .tags { display: flex; gap: 7px; flex-wrap: wrap; }
.card .tags span { font-size: 12.5px; color: var(--muted); background: var(--panel-2); padding: 2px 9px; border-radius: 6px; }

.cover { border-radius: 10px; margin-bottom: 2px; height: 160px; object-fit: cover; width: 100%;
  background: linear-gradient(135deg, rgba(108,123,255,.2), rgba(34,211,238,.15)); }

/* ---------- sidebar ---------- */
.side { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 84px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.panel h3 { margin: 0 0 12px; font-size: 14px; letter-spacing: .5px; color: var(--muted); text-transform: uppercase; font-weight: 600; }
.panel ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.panel li a { display: flex; justify-content: space-between; padding: 6px 8px; border-radius: 8px; font-size: 14.5px; color: var(--muted); transition: .15s; }
.panel li a:hover, .panel li a.on { background: var(--panel-2); color: var(--text); }
.panel li a .n { font-size: 12.5px; opacity: .75; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 7px; }

/* ---------- pager ---------- */
.pager { display: flex; justify-content: center; gap: 8px; margin-top: 26px; }
.pager button {
  min-width: 38px; height: 38px; padding: 0 12px; border-radius: 10px; cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text); font-size: 14px; transition: .18s;
}
.pager button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pager button.on { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; }
.pager button:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- article ---------- */
.article { max-width: 780px; margin: 0 auto; padding: 40px 20px 60px; position: relative; z-index: 1; }
.article-head { margin-bottom: 26px; }
.article-head h1 { margin: 10px 0 14px; font-size: 34px; line-height: 1.35; letter-spacing: -.4px; }
.article-meta { display: flex; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.article-cover { border-radius: var(--radius); margin-bottom: 26px; max-height: 360px; object-fit: cover; width: 100%; }

.markdown { font-size: 16.5px; color: var(--text); }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { margin: 1.7em 0 .7em; line-height: 1.4; }
.markdown h1 { font-size: 27px; } .markdown h2 { font-size: 23px; } .markdown h3 { font-size: 19px; }
.markdown h2 { border-bottom: 1px solid var(--border); padding-bottom: .35em; }
.markdown p { margin: 1em 0; }
.markdown ul, .markdown ol { padding-left: 1.5em; }
.markdown li { margin: .4em 0; }
.markdown blockquote {
  margin: 1.3em 0; padding: 12px 18px; border-left: 3px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 10px 10px 0; color: var(--muted);
}
.markdown blockquote p { margin: 0; }
.markdown code { background: var(--panel-2); padding: 2px 6px; border-radius: 5px; font-size: .88em; font-family: "JetBrains Mono", Consolas, monospace; }
.markdown pre { background: #0d1117; border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; overflow-x: auto; margin: 1.3em 0; }
.markdown pre code { background: none; padding: 0; color: #d7dcea; font-size: 14px; line-height: 1.65; }
.markdown table { width: 100%; border-collapse: collapse; margin: 1.3em 0; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 9px 12px; }
.markdown th { background: var(--panel-2); }
.markdown hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }
.markdown img { border-radius: 10px; margin: 1em 0; }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 46px; }
.post-nav a { padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--panel); transition: .18s; }
.post-nav a:hover { border-color: var(--accent); }
.post-nav small { display: block; color: var(--muted); font-size: 12.5px; margin-bottom: 4px; }

/* ---------- buttons / forms ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 7px; justify-content: center;
  padding: 9px 17px; border-radius: 10px; cursor: pointer; font-size: 14.5px; font-weight: 500;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; transition: .18s;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn.ghost { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); filter: none; }
.btn.danger { background: linear-gradient(135deg, #ff6b6b, #e0483f); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

input, textarea, select {
  width: 100%; padding: 10px 13px; border-radius: 10px; font-size: 14.5px; font-family: inherit;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text); outline: none; transition: .18s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
label { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 6px; }
.field { margin-bottom: 15px; }

.empty { text-align: center; padding: 70px 20px; color: var(--muted); }
.empty .big { font-size: 44px; margin-bottom: 12px; opacity: .5; }

.loading { text-align: center; padding: 50px; color: var(--muted); }

footer.site {
  border-top: 1px solid var(--border); padding: 26px 0; color: var(--muted); font-size: 14px;
  position: relative; z-index: 1;
}
footer.site .wrap { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }

/* ---------- admin ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; position: relative; z-index: 1; }
.login-card {
  width: 100%; max-width: 390px; padding: 34px; border-radius: 18px;
  background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 6px; font-size: 24px; }
.login-card .sub { color: var(--muted); margin: 0 0 24px; font-size: 14.5px; }

.admin { display: grid; grid-template-columns: 216px 1fr; min-height: 100vh; position: relative; z-index: 1; }
.admin-side { border-right: 1px solid var(--border); padding: 20px 14px; background: var(--bg-soft); }
[data-theme="dark"] .admin-side { background: rgba(255, 255, 255, .015); }
.admin-side .menu { display: flex; flex-direction: column; gap: 3px; margin-top: 18px; }
.admin-side .menu button {
  text-align: left; padding: 10px 13px; border-radius: 10px; cursor: pointer; font-size: 14.5px;
  background: none; border: none; color: var(--muted); transition: .15s; font-family: inherit;
}
.admin-side .menu button:hover { background: var(--panel-2); color: var(--text); }
.admin-side .menu button.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.admin-main { padding: 26px 30px; overflow-x: hidden; }
.admin-head { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.admin-head h2 { margin: 0; font-size: 22px; }
.admin-head .spacer { margin-left: auto; }

.table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.table th, .table td { padding: 11px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.table th { color: var(--muted); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .4px; }
.table tr:hover td { background: var(--panel-2); }
.table .actions { display: flex; gap: 6px; }
.table .actions button {
  padding: 5px 11px; font-size: 13px; border-radius: 8px; cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text); transition: .15s;
}
.table .actions button:hover { border-color: var(--accent); color: var(--accent); }
.table .actions button.del:hover { border-color: var(--danger); color: var(--danger); }

.editor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.editor-pane { display: flex; flex-direction: column; }
.editor-pane textarea {
  min-height: 520px; resize: vertical; font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 14px; line-height: 1.7;
}
.preview-pane {
  min-height: 520px; padding: 18px 20px; border-radius: 10px; overflow-y: auto;
  background: var(--panel-2); border: 1px solid var(--border);
}
.preview-pane .markdown { font-size: 15.5px; }

.ai-panel { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 12px 14px; border-radius: 12px; background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); margin-bottom: 14px; }
.ai-panel .label { font-size: 13.5px; font-weight: 600; color: var(--accent); margin-right: 4px; }
.ai-btn { padding: 6px 13px; font-size: 13.5px; border-radius: 8px; cursor: pointer; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); transition: .15s; }
.ai-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.ai-btn:disabled { opacity: .5; cursor: not-allowed; }

.modal {
  position: fixed; inset: 0; z-index: 100; display: none; place-items: center; padding: 20px;
  background: rgba(0, 0, 0, .55); backdrop-filter: blur(3px);
}
.modal.show { display: grid; }
.modal-card {
  width: 100%; max-width: 460px; padding: 24px; border-radius: 16px;
  background: var(--bg-soft); border: 1px solid var(--border); box-shadow: var(--shadow); max-height: 84vh; overflow-y: auto;
}
.modal-card h3 { margin: 0 0 16px; font-size: 18px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(80px);
  padding: 11px 22px; border-radius: 11px; z-index: 200; opacity: 0; transition: .25s;
  background: var(--bg-soft); border: 1px solid var(--border); box-shadow: var(--shadow); font-size: 14.5px;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.ok { border-color: var(--ok); color: var(--ok); }
.toast.err { border-color: var(--danger); color: var(--danger); }

.spin { display: inline-block; width: 13px; height: 13px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: sp .7s linear infinite; vertical-align: -2px; }
@keyframes sp { to { transform: rotate(360deg); } }

.switch { display: inline-flex; align-items: center; gap: 9px; cursor: pointer; font-size: 14.5px; color: var(--muted); }
.switch input { width: 38px; height: 21px; appearance: none; background: var(--panel-2); border: 1px solid var(--border); border-radius: 999px; position: relative; cursor: pointer; transition: .2s; }
.switch input::after { content: ""; position: absolute; top: 2px; left: 2px; width: 15px; height: 15px; border-radius: 50%; background: var(--muted); transition: .2s; }
.switch input:checked { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }
.switch input:checked::after { left: 19px; background: #fff; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { padding: 18px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--border); }
.stat .n { font-size: 27px; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 13.5px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; }
  .editor-grid { grid-template-columns: 1fr; }
  .admin { grid-template-columns: 1fr; }
  .admin-side { border-right: none; border-bottom: 1px solid var(--border); }
  .admin-side .menu { flex-direction: row; flex-wrap: wrap; }
  .hero h1 { font-size: 30px; }
  .nav { display: none; }
  .search-box { min-width: 130px; }
}