/* ===== Reset & Variables ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#faf9fb;
  --card:#ffffff;
  --text:#3a4145;
  --text2:#6a6d75;
  --text3:#9a9da5;
  --accent:#5c8ec6;
  --accent-hover:#ff6600;
  --border:rgba(0,0,0,0.07);
  --shadow:0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md:0 4px 12px rgba(0,0,0,0.06);
  --radius:12px;
  --ease-out:cubic-bezier(0.16,1,0.3,1);
}
html{scroll-behavior:smooth}
body{
  font-family:Merriweather,'Open Sans','Microsoft Yahei',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-weight:400;
  overflow-x:hidden;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* ===== Particle Canvas ===== */
#particle-canvas{position:fixed;inset:0;z-index:0;pointer-events:none}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:10;
  background:var(--card);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 24px;
}
.logo{font-family:Inter,sans-serif;font-size:17px;font-weight:800;color:#1a1c2e;text-decoration:none;letter-spacing:-0.5px}
.logo-dot{color:var(--accent)}
.logo-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid var(--accent);flex-shrink:0}
.nav{display:flex;gap:6px}
.nav a{color:var(--text2);text-decoration:none;font-family:Inter,sans-serif;font-size:13px;font-weight:500;padding:5px 14px;border-radius:20px;transition:all .25s var(--ease-out)}
.nav a:hover{background:rgba(92,142,198,0.08);color:var(--accent)}

/* ===== Main Content ===== */
.main{position:relative;z-index:1;flex:1;padding:32px 24px 60px;max-width:1300px;margin:0 auto;width:100%}

.page-title{font-size:26px;font-weight:900;color:#1a1c2e;margin-bottom:24px;letter-spacing:-0.5px;font-family:Inter,sans-serif}

/* ===== List Layout: Sidebar + Content ===== */
.list-layout{display:flex;gap:40px;margin-top:8px}
.column-sidebar{width:200px;flex-shrink:0;position:fixed;left:24px;top:50%;transform:translateY(-50%);background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px 0;box-shadow:0 1px 3px rgba(0,0,0,0.03), 0 4px 16px rgba(0,0,0,0.04);z-index:5;overflow:hidden}
.column-sidebar-title{font-family:Inter,sans-serif;font-size:10px;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:8px;padding:0 20px}
.column-sidebar .col-tab{position:relative;z-index:1;display:flex;align-items:center;gap:8px;width:100%;padding:8px 20px;border:none;background:transparent;color:var(--text2);cursor:pointer;font-family:Inter,sans-serif;font-size:13px;font-weight:500;text-align:left;transition:color .25s var(--ease-out)}
.column-sidebar .col-tab:hover{color:var(--accent)}
.column-sidebar .col-tab.active{color:#fff;font-weight:600}
.col-tab-dot{display:none}

/* Sliding indicator */
.column-sidebar::after{content:'';position:absolute;left:8px;right:8px;top:var(--indicator-top, 24px);height:34px;background:var(--accent);border-radius:10px;z-index:0;transition:top .35s cubic-bezier(0.4,0,0.2,1);pointer-events:none}

.column-content{flex:1;min-width:0;padding-top:2px;margin-left:240px}
.column-section{margin-bottom:32px}
.column-section{animation:fadeSlideIn .4s var(--ease-out) both}
@keyframes fadeSlideIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.column-tabs{display:none}

/* ===== Column Sections ===== */
.column-section{margin-bottom:28px}
.column-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.column-dot{display:inline-block;width:14px;height:14px;border-radius:50%;flex-shrink:0}
.column-name{font-family:Inter,sans-serif;font-size:18px;font-weight:800;color:#1a1c2e;margin:0}
.column-count{font-size:12px;color:var(--text3);font-family:Inter,sans-serif}

/* ===== Post Cards ===== */
.post-list{display:flex;flex-direction:column;gap:14px}
.post-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:22px 26px;
  box-shadow:var(--shadow);
  transition:box-shadow .3s var(--ease-out),transform .3s var(--ease-out);
  text-decoration:none;display:block;color:inherit;
}
a.post-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}
.post-card .post-title{
  font-family:Inter,sans-serif;font-size:18px;font-weight:700;
  color:#1a1c2e;margin-bottom:6px;line-height:1.35;
}
a.post-card:hover .post-title{color:var(--accent)}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:12.5px;color:var(--text3);margin-bottom:8px;
  font-family:Inter,sans-serif;
}
.tag{
  color:var(--accent);background:rgba(92,142,198,0.07);
  padding:1px 8px;border-radius:20px;font-size:12px;
  text-decoration:none;font-weight:500;
  transition:background .2s;
}
.tag:hover{background:rgba(92,142,198,0.15)}
.post-excerpt{color:var(--text2);font-size:14px;line-height:1.65}

/* ===== Post Detail ===== */
.post-page{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px 40px;box-shadow:var(--shadow)}
.post-page-title{
  font-family:Inter,sans-serif;font-size:28px;font-weight:900;
  color:#1a1c2e;letter-spacing:-0.5px;margin-bottom:10px;line-height:1.3;
}
.post-page .post-meta{margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.back-link{display:none;align-items:center;gap:4px;color:var(--text2);text-decoration:none;font-size:13px;font-weight:500;padding:6px 14px;border-radius:20px;background:var(--card);border:1px solid var(--border);box-shadow:0 1px 3px rgba(0,0,0,0.04);transition:all .25s var(--ease-out);position:fixed;top:68px;left:24px;z-index:20;width:fit-content}
.back-link.visible{display:flex}
.back-link:hover{color:var(--accent);border-color:var(--accent)}
.back-arrow{font-size:15px;color:var(--accent)}

/* ===== Markdown Body ===== */
.markdown-body{font-size:15px;color:var(--text)}
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{font-family:Inter,sans-serif;color:#1a1c2e;margin:1.6em 0 .5em;line-height:1.35}
.markdown-body h1{font-size:1.55em;border-bottom:2px solid var(--border);padding-bottom:8px}
.markdown-body h2{font-size:1.3em}
.markdown-body h3{font-size:1.1em}
.markdown-body p{margin:.8em 0}
.markdown-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.markdown-body a:hover{color:var(--accent-hover)}
.markdown-body img{max-width:100%;border-radius:8px;margin:.6em 0}
.markdown-body ul,.markdown-body ol{margin:.8em 0;padding-left:1.8em}
.markdown-body li{margin:.3em 0}
.markdown-body blockquote{border-left:3px solid var(--accent);background:rgba(92,142,198,0.04);padding:.7em 1em;margin:1em 0;color:var(--text2);border-radius:0 6px 6px 0}
.markdown-body table{border-collapse:collapse;margin:1em 0;width:100%;font-size:14px}
.markdown-body th,.markdown-body td{border:1px solid var(--border);padding:8px 14px;text-align:left}
.markdown-body th{background:#f5f6f8;color:#1a1c2e;font-weight:600;font-family:Inter,sans-serif}
.markdown-body code{font-family:'JetBrains Mono','Fira Code',Consolas,monospace;background:rgba(92,142,198,0.08);padding:2px 6px;border-radius:4px;font-size:.9em;color:#3a5a8c}
.markdown-body pre{background:#f5f6f8;border:1px solid var(--border);border-radius:10px;padding:18px 20px;overflow-x:auto;margin:1em 0}
.markdown-body pre code{background:none;padding:0;color:var(--text);display:block;font-size:13.5px;line-height:1.65}
.markdown-body pre code.hljs{background:#282c34;color:#abb2bf;padding:0}
.markdown-body hr{border:none;border-top:1px solid var(--border);margin:2em 0}
.markdown-body input[type=checkbox]{margin-right:6px;accent-color:var(--accent)}

/* ===== Empty State ===== */
.empty{text-align:center;padding:60px 24px;color:var(--text3);font-size:15px}
.empty a{color:var(--accent)}

/* ===== Footer ===== */
.site-footer{
  position:relative;z-index:1;
  text-align:center;padding:18px;color:var(--text3);
  font-size:12px;border-top:1px solid var(--border);
  font-family:Inter,sans-serif;
}
.site-footer a{color:var(--text3);text-decoration:none}
.site-footer a:hover{color:var(--accent)}

/* ===== Buttons ===== */
.btn{display:inline-block;font-family:Inter,sans-serif;border:1px solid var(--border);background:var(--card);color:var(--text);padding:7px 14px;border-radius:8px;font-size:13px;cursor:pointer;transition:all .25s var(--ease-out);text-decoration:none}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:#4a7db8;border-color:#4a7db8;color:#fff}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-ghost{background:transparent}
.btn-danger:hover{border-color:#ff5c6c;color:#ff5c6c}
.inline-form{display:inline}

/* ===== Admin Table ===== */
.admin-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.admin-toolbar .page-title{margin-bottom:0}
.admin-table{width:100%;border-collapse:collapse;font-size:13.5px;font-family:Inter,sans-serif}
.admin-table th,.admin-table td{border-bottom:1px solid var(--border);padding:12px 14px;text-align:left;vertical-align:middle}
.admin-table th{color:var(--text3);font-size:12px;font-weight:600}
.admin-table td a{color:var(--text);text-decoration:none}
.admin-table td a:hover{color:var(--accent)}
.badge{font-size:11px;padding:2px 8px;border-radius:20px;font-weight:600}
.badge-on{color:#27d86e;background:rgba(39,216,110,0.1)}
.badge-off{color:var(--text3);background:rgba(0,0,0,0.04)}
.row-actions{white-space:nowrap}

/* ===== Editor ===== */
.editor-form .title-input,.editor-form .tags-input{width:100%;background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:10px 14px;font-size:14px;margin-bottom:12px;font-family:Inter,sans-serif}
.editor-form input:focus,.editor-form textarea:focus{outline:none;border-color:var(--accent)}
.editor{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.editor-pane{background:var(--card);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.editor-toolbar{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--border);font-size:12px;color:var(--text3);font-family:Inter,sans-serif}
.editor-toolbar button{background:#f5f6f8;border:1px solid var(--border);color:var(--text);padding:4px 10px;border-radius:6px;font-size:12px;cursor:pointer;font-family:Inter,sans-serif}
.editor-toolbar button:hover{border-color:var(--accent);color:var(--accent)}
.editor-form textarea{width:100%;background:transparent;border:none;color:var(--text);padding:18px;font-family:'JetBrains Mono',Consolas,monospace;font-size:15px;line-height:1.75;resize:vertical;min-height:65vh}
#preview{height:65vh;overflow-y:auto;padding:18px;font-size:15px;line-height:1.7}
.editor-actions{display:flex;gap:10px;align-items:center}
.hint{color:var(--text3)}

/* ===== Login ===== */
.login-wrap{position:relative;z-index:1;flex:1;display:flex;align-items:center;justify-content:center;padding:60px 24px}
.login-card{width:100%;max-width:340px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.login-card h1{font-family:Inter,sans-serif;font-size:20px;color:#1a1c2e;margin-bottom:20px;text-align:center}
.login-card input{width:100%;background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:10px 12px;margin-bottom:12px;font-size:14px;font-family:Inter,sans-serif}
.login-card input:focus{outline:none;border-color:var(--accent)}
.login-card button{width:100%}
.login-back{text-align:center;font-size:13px;margin-top:14px;font-family:Inter,sans-serif}
.error{background:rgba(255,92,108,0.06);color:#e04a5a;border:1px solid rgba(255,92,108,0.2);padding:8px 12px;border-radius:8px;font-size:13px;margin-bottom:12px;font-family:Inter,sans-serif}

/* ===== Custom Column Dropdown ===== */
.col-dropdown{position:relative;flex:1}
.col-dropdown-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:8px 12px;font-size:13px;font-family:Inter,sans-serif;cursor:pointer;transition:border-color .2s}
.col-dropdown-btn:hover{border-color:var(--accent)}
.col-dropdown-arrow{width:16px;height:16px;transition:transform .3s var(--ease-out);color:var(--text3)}
.col-dropdown.open .col-dropdown-arrow{transform:rotate(180deg)}
.col-dropdown.open .col-dropdown-btn{border-color:var(--accent);border-radius:8px 8px 0 0}
.col-dropdown-menu{position:absolute;top:100%;left:0;right:0;background:var(--card);border:1px solid var(--accent);border-top:none;border-radius:0 0 8px 8px;overflow:hidden;z-index:30;opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .25s var(--ease-out),transform .25s var(--ease-out)}
.col-dropdown.open .col-dropdown-menu{opacity:1;transform:translateY(0);pointer-events:auto}
.col-dropdown-item{padding:8px 12px;font-size:13px;font-family:Inter,sans-serif;cursor:pointer;display:flex;align-items:center;gap:8px;transition:background .15s}
.col-dropdown-item:hover{background:rgba(92,142,198,0.06)}
.col-dropdown-item.active{color:var(--accent);font-weight:600;background:rgba(92,142,198,0.05)}
.col-dropdown-dot{display:inline-block;width:8px;height:8px;border-radius:50%}

/* ===== View Transitions ===== */
@view-transition{navigation:auto}
::view-transition-old(root){animation:vt-out .5s var(--ease-out)}
::view-transition-new(root){animation:vt-in .55s var(--ease-out)}
@keyframes vt-out{from{opacity:1;transform:none}to{opacity:0;transform:scale(.96) translateY(-12px)}}
@keyframes vt-in{from{clip-path:circle(0px at var(--vt-x,50%) var(--vt-y,50%))}to{clip-path:circle(200vmax at var(--vt-x,50%) var(--vt-y,50%))}}


/* ===== Theme Button Component ===== */
theme-button{position:fixed;bottom:170px;right:24px;z-index:100;width:120px;height:47px;display:block}

/* ===== Dark Theme ===== */
body.dark{--bg:#17181d;--card:#202228;--text:#d6d8e0;--text2:#9aa0ac;--text3:#676d7a;--accent:#6ea3d8;--border:rgba(255,255,255,0.07)}
body.dark{transition:background .4s}
body.dark .site-header{background:var(--card)}
body.dark .logo{color:#e8eaf2}
body.dark .column-name{color:#e8eaf2}
body.dark .post-page-title{color:#e8eaf2}
body.dark .post-title{color:#e8eaf2}
body.dark .page-title{color:#e8eaf2}
body.dark .markdown-body h1,body.dark .markdown-body h2,body.dark .markdown-body h3,body.dark .markdown-body h4{color:#e8eaf2}
body.dark .markdown-body th{background:#262932;color:#e8eaf2}
body.dark .markdown-body code{color:#8fc1ec}
body.dark .markdown-body pre{background:#262932}
body.dark .markdown-body blockquote{background:rgba(110,163,216,0.06)}
body.dark .editor-toolbar button{background:#262932}
body.dark .login-card h1{color:#e8eaf2}
body.dark .post-card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.3)}
body.dark .badge-off{background:rgba(255,255,255,0.06)}
body.dark .column-sidebar .col-tab:hover{background:rgba(110,163,216,0.08)}
body.dark .col-dropdown-menu{background:var(--card)}
body.dark .col-dropdown-item:hover{background:rgba(110,163,216,0.08)}

/* ===== Responsive ===== */
@media(max-width:768px){
  .editor{grid-template-columns:1fr}
  #preview{height:auto;max-height:320px}
  .post-page{padding:24px 20px}
  .main{padding:20px 16px 40px}
}