/* =============================================
   BlogApp - Modern Blog Design System
   ============================================= */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #f59e0b;
    --danger: #ef4444;
    --danger-light: #fca5a5;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,.1), 0 10px 10px rgba(0,0,0,.04);
    --radius-sm: 8px; --radius: 12px; --radius-lg: 16px; --radius-xl: 24px;
    --transition: .25s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
.navbar{background:rgba(255,255,255,.85)!important;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border)!important;box-shadow:var(--shadow-sm)!important;position:sticky!important;top:0;z-index:1000;padding:.6rem 0}
.navbar-brand{font-weight:800!important;font-size:1.35rem!important;background:linear-gradient(135deg,var(--primary),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}
.nav-link{font-weight:500!important;border-radius:var(--radius-sm)!important;padding:.5rem 1rem!important;transition:all var(--transition)!important}
.nav-link:hover{background:var(--border-light)!important;color:var(--primary)!important}
.hero-section{position:relative;text-align:center;padding:5rem 2rem 4rem;overflow:hidden;margin-bottom:2rem}
.hero-content{position:relative;z-index:1}
.hero-title{font-size:3rem;font-weight:800;margin-bottom:.75rem;letter-spacing:-1px;animation:fadeInUp .8s ease}
.hero-subtitle{font-size:1.2rem;color:var(--text-secondary);margin-bottom:2rem;animation:fadeInUp .8s ease .15s both}
.btn-create-post{display:inline-flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,var(--primary),#a855f7);color:#fff;padding:.85rem 2rem;border-radius:999px;font-weight:600;font-size:1.05rem;border:none;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 15px rgba(99,102,241,.35);animation:fadeInUp .8s ease .3s both;text-decoration:none}
.btn-create-post:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(99,102,241,.45);color:#fff}
.hero-bg-shapes .shape{position:absolute;border-radius:50%;opacity:.06;pointer-events:none}
.shape-1{width:400px;height:400px;background:var(--primary);top:-150px;right:-100px;animation:float 8s ease-in-out infinite}
.shape-2{width:300px;height:300px;background:#a855f7;bottom:-100px;left:-80px;animation:float 10s ease-in-out infinite reverse}
.shape-3{width:200px;height:200px;background:var(--accent);top:50%;left:50%;animation:float 7s ease-in-out infinite 2s}
.posts-toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;margin-bottom:2rem;padding:0 .5rem}
.section-title{font-size:1.5rem;font-weight:700}
.search-box{display:flex;align-items:center;gap:.5rem;background:var(--bg-card);border:2px solid var(--border);border-radius:999px;padding:.6rem 1.2rem;transition:all var(--transition);min-width:260px}
.search-box:focus-within{border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.search-box svg{color:var(--text-muted);flex-shrink:0}
.search-box input{border:none;outline:none;font-size:.95rem;background:transparent;width:100%;color:var(--text)}
.search-box input::placeholder{color:var(--text-muted)}
.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.75rem;padding:0 .5rem 3rem}
.post-card{background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:all .35s cubic-bezier(.4,0,.2,1);position:relative;border:1px solid var(--border-light)}
.post-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}
.post-card-link{display:block;color:inherit}
.post-card-link:hover{color:inherit}
.post-card-cover{position:relative;height:200px;overflow:hidden;background:linear-gradient(135deg,#e0e7ff,#fae8ff)}
.post-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.post-card:hover .post-card-cover img{transform:scale(1.06)}
.post-card-cover-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:4rem;font-weight:800;color:rgba(99,102,241,.3)}
.post-card-overlay{position:absolute;inset:0;background:rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s ease;color:#fff;font-weight:600;font-size:1.1rem;backdrop-filter:blur(2px)}
.post-card:hover .post-card-overlay{opacity:1}
.post-card-body{padding:1.25rem 1.25rem .75rem}
.post-card-title{font-size:1.15rem;font-weight:700;margin-bottom:.4rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.post-card-summary{font-size:.9rem;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:.75rem;line-height:1.5}
.post-card-meta{display:flex;align-items:center;gap:.75rem;font-size:.8rem;color:var(--text-muted)}
.edited-badge{background:var(--border-light);color:var(--text-secondary);font-size:.72rem;padding:.15rem .55rem;border-radius:999px;font-weight:500}
.post-card-actions{display:flex;gap:.35rem;padding:0 1.25rem 1.25rem}
.btn-action{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg);color:var(--text-secondary);transition:all var(--transition);cursor:pointer}
.btn-edit:hover{background:#e0e7ff;color:var(--primary);border-color:var(--primary-light)}
.btn-delete:hover{background:#fee2e2;color:var(--danger);border-color:var(--danger-light)}
.empty-state{text-align:center;padding:5rem 2rem;animation:fadeInUp .6s ease}
.empty-icon{font-size:4rem;margin-bottom:1rem}
.empty-state h3{font-size:1.4rem;margin-bottom:.5rem;color:var(--text-secondary)}
.empty-state p{color:var(--text-muted)}
.post-detail{max-width:800px;margin:0 auto;padding:2rem 1rem 4rem}
.post-detail-cover{border-radius:var(--radius-xl);overflow:hidden;margin-bottom:2rem;box-shadow:var(--shadow-lg)}
.post-detail-cover img{width:100%;max-height:420px;object-fit:cover;display:block}
.post-detail-header h1{font-size:2.2rem;font-weight:800;margin-bottom:.75rem;letter-spacing:-.5px;line-height:1.3}
.post-detail-meta{display:flex;gap:1rem;align-items:center;color:var(--text-muted);font-size:.9rem;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid var(--border)}
.post-detail-content{font-size:1.08rem;line-height:1.85;color:var(--text)}
.post-detail-content h2{font-size:1.5rem;margin:2rem 0 .75rem}
.post-detail-content h3{font-size:1.25rem;margin:1.5rem 0 .5rem}
.post-detail-content p{margin-bottom:1.25rem}
.post-detail-content img{max-width:100%;border-radius:var(--radius);margin:1.5rem 0;box-shadow:var(--shadow-md)}
.post-detail-content ul,.post-detail-content ol{margin:1rem 0;padding-left:1.5rem}
.post-detail-content li{margin-bottom:.4rem}
.post-detail-content blockquote{border-left:4px solid var(--primary-light);padding:.75rem 1.25rem;margin:1.5rem 0;background:var(--border-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}
.post-detail-actions{display:flex;gap:.75rem;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}
.back-link{display:inline-flex;align-items:center;gap:.4rem;color:var(--text-secondary);font-weight:500;margin-bottom:1.5rem;font-size:.9rem;transition:color var(--transition)}
.back-link:hover{color:var(--primary)}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.65rem 1.4rem;border-radius:999px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none}
.btn-primary-lg{background:linear-gradient(135deg,var(--primary),#a855f7);color:#fff;padding:.8rem 2rem;box-shadow:0 4px 15px rgba(99,102,241,.3)}
.btn-primary-lg:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(99,102,241,.4);color:#fff}
.btn-danger-lg{background:#fff;color:var(--danger);border:2px solid var(--danger)}
.btn-danger-lg:hover{background:var(--danger);color:#fff}
.btn-cancel{background:var(--border-light);color:var(--text-secondary);padding:.8rem 2rem}
.btn-cancel:hover{background:var(--border);color:var(--text)}
.editor-page{max-width:900px;margin:0 auto;padding:2rem 1rem 4rem}
.editor-title{font-size:1.8rem;font-weight:800;margin-bottom:2rem}
.editor-form{display:flex;flex-direction:column;gap:1.5rem}
.form-group{display:flex;flex-direction:column;gap:.45rem}
.form-group label{font-weight:600;font-size:.95rem;color:var(--text)}
.label-hint{font-weight:400;color:var(--text-muted);font-size:.85rem}
.form-input{width:100%;padding:.75rem 1rem;border:2px solid var(--border);border-radius:var(--radius);font-size:1rem;font-family:inherit;transition:all var(--transition);background:var(--bg-card);color:var(--text)}
.form-input:focus{outline:none;border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.form-textarea{resize:vertical;min-height:70px}
.cover-upload-area{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:1.5rem;text-align:center;cursor:pointer;transition:all var(--transition);position:relative}
.cover-upload-area:hover{border-color:var(--primary-light);background:rgba(99,102,241,.03)}
.cover-preview{display:flex;flex-direction:column;align-items:center;gap:.75rem;color:var(--text-muted);font-size:.9rem;min-height:120px;justify-content:center}
.cover-preview img{max-height:200px;border-radius:var(--radius)}
.btn-remove-cover{position:absolute;top:.75rem;right:.75rem;background:var(--danger);color:#fff;border:none;padding:.35rem .75rem;border-radius:999px;font-size:.8rem;font-weight:600;cursor:pointer;transition:all var(--transition)}
.btn-remove-cover:hover{background:#dc2626}
.editor-toolbar{display:flex;align-items:center;gap:.25rem;flex-wrap:wrap;padding:.5rem .75rem;background:var(--bg);border:2px solid var(--border);border-bottom:none;border-radius:var(--radius) var(--radius) 0 0}
.toolbar-btn{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border:none;background:transparent;border-radius:var(--radius-sm);cursor:pointer;font-size:.9rem;color:var(--text-secondary);transition:all var(--transition)}
.toolbar-btn:hover{background:var(--border-light);color:var(--primary)}
.toolbar-sep{width:1px;height:20px;background:var(--border);margin:0 .25rem}
.editor-content{min-height:400px;padding:1.25rem;border:2px solid var(--border);border-radius:0 0 var(--radius) var(--radius);font-size:1.05rem;line-height:1.8;outline:none;background:var(--bg-card);transition:border-color var(--transition)}
.editor-content:focus{border-color:var(--primary-light)}
.editor-content img{max-width:100%;border-radius:var(--radius-sm);margin:.5rem 0}
.form-actions{display:flex;gap:.75rem;padding-top:1rem}
.delete-page{max-width:500px;margin:3rem auto;padding:0 1rem}
.delete-card{text-align:center;background:var(--bg-card);border-radius:var(--radius-xl);padding:3rem 2rem;box-shadow:var(--shadow-lg);border:1px solid var(--border-light);animation:fadeInUp .5s ease}
.delete-icon{font-size:3.5rem;margin-bottom:1rem}
.delete-card h2{font-size:1.5rem;margin-bottom:.75rem}
.delete-card p{color:var(--text-secondary);margin-bottom:.5rem}
.delete-warning{font-size:.85rem;color:var(--danger)!important;margin-bottom:2rem!important}
.delete-card .form-actions{justify-content:center}
.footer{background:var(--bg-card)!important;border-top:1px solid var(--border)!important;padding:1.5rem 0!important;text-align:center;font-size:.85rem;color:var(--text-muted)!important}
.text-danger{color:var(--danger);font-size:.85rem;margin-top:.25rem}
.field-validation-error{color:var(--danger);font-size:.85rem}
@keyframes fadeInUp{from{opacity:0;transform:translateY(25px)}to{opacity:1;transform:translateY(0)}}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(30px,-30px) scale(1.05)}66%{transform:translate(-20px,20px) scale(.95)}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@media(max-width:768px){.hero-title{font-size:2rem}.hero-section{padding:3rem 1rem 2.5rem}.posts-grid{grid-template-columns:1fr}.posts-toolbar{flex-direction:column;align-items:stretch}.search-box{min-width:auto}.post-detail-header h1{font-size:1.6rem}.post-detail{padding:1.5rem .5rem 3rem}}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

/* ===== Blog Layout (sidebar + main) ===== */
.blog-layout{display:flex;gap:2rem;max-width:1280px;margin:0 auto;padding:2rem 1.5rem 3rem;align-items:flex-start}

/* ===== Sidebar ===== */
.blog-sidebar{width:260px;flex-shrink:0;position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;padding-right:.5rem}
.sidebar-section{margin-bottom:1.75rem}
.sidebar-title{font-size:1rem;font-weight:700;margin-bottom:.85rem;color:var(--text);display:flex;align-items:center;gap:.35rem}
.sidebar-empty{color:var(--text-muted);font-size:.85rem;padding:.5rem 0}

/* ===== Timeline ===== */
.timeline-list{list-style:none;padding:0;position:relative}
.timeline-list::before{content:'';position:absolute;left:4px;top:4px;bottom:4px;width:2px;background:var(--border);border-radius:1px}
.timeline-item{display:flex;align-items:center;gap:.6rem;padding:.35rem 0;font-size:.85rem;position:relative;padding-left:16px}
.timeline-dot{width:10px;height:10px;border-radius:50%;background:var(--border);border:2px solid var(--bg);flex-shrink:0;position:absolute;left:0}
.timeline-item:nth-child(-n+2) .timeline-dot{background:var(--primary-light)}
.timeline-label{color:var(--text-secondary);flex:1}
.timeline-count{background:var(--border-light);color:var(--text-muted);font-size:.72rem;padding:.1rem .5rem;border-radius:999px;font-weight:600}

/* ===== Tag Cloud ===== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:.4rem}
.tag-pill{display:inline-flex;align-items:center;gap:.3rem;padding:.3rem .75rem;border-radius:999px;font-size:.82rem;font-weight:500;background:var(--border-light);color:var(--text-secondary);transition:all var(--transition);text-decoration:none;border:1.5px solid transparent}
.tag-pill:hover{background:#e0e7ff;color:var(--primary);border-color:var(--primary-light);transform:translateY(-1px)}
.tag-pill.active{background:linear-gradient(135deg,var(--primary),#a855f7);color:#fff;border-color:transparent;box-shadow:0 2px 10px rgba(99,102,241,.25)}
.tag-pill.active .tag-count{background:rgba(255,255,255,.25);color:#fff}
.tag-count{background:rgba(0,0,0,.06);font-size:.68rem;padding:.05rem .4rem;border-radius:999px;font-weight:700}

/* ===== Tag Filter Bar ===== */
.tag-filter-bar{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,#e0e7ff,#fae8ff);border-radius:var(--radius);padding:.75rem 1.25rem;margin-bottom:1.5rem;font-size:.9rem;color:var(--text-secondary)}
.btn-clear-filter{color:var(--primary);font-weight:600;font-size:.85rem;text-decoration:none;padding:.25rem .75rem;border-radius:999px;background:rgba(255,255,255,.6);transition:all var(--transition)}
.btn-clear-filter:hover{background:#fff;color:var(--primary-dark)}

/* ===== Post Card Tags ===== */
.post-card-tags{display:flex;flex-wrap:wrap;gap:.3rem;margin-bottom:.5rem}
.mini-tag{font-size:.7rem;padding:.1rem .5rem;border-radius:999px;background:rgba(99,102,241,.08);color:var(--primary);font-weight:500}

/* ===== Tag Input ===== */
.tag-input-wrap{position:relative}

/* ===== Responsive Sidebar ===== */
@media(max-width:900px){.blog-layout{flex-direction:column}.blog-sidebar{width:100%;position:static;max-height:none;display:flex;gap:1.5rem;overflow-x:auto;padding-bottom:1rem;border-bottom:1px solid var(--border);margin-bottom:1rem}.sidebar-section{min-width:180px;margin-bottom:0}.timeline-list{display:flex;gap:.5rem;flex-wrap:wrap}.timeline-list::before{display:none}.timeline-item{padding-left:0}.timeline-dot{display:none}}

/* ===== Posts Page Layout ===== */
.posts-page{max-width:960px;margin:0 auto;padding:2rem 1.5rem 3rem}
.toolbar-right{display:flex;align-items:center;gap:.75rem}
.btn-tags-nav{display:inline-flex;align-items:center;gap:.35rem;padding:.5rem 1rem;border-radius:999px;font-weight:600;font-size:.85rem;background:var(--border-light);color:var(--text-secondary);text-decoration:none;transition:all var(--transition);white-space:nowrap}
.btn-tags-nav:hover{background:#e0e7ff;color:var(--primary)}

/* ===== Vertical Timeline ===== */
.timeline-layout{position:relative;padding-left:0}
.tl-row{display:flex;gap:1.25rem;margin-bottom:1.5rem;align-items:flex-start}

/* Timeline marker column */
.tl-marker{width:90px;flex-shrink:0;position:relative;display:flex;flex-direction:column;align-items:center}
.tl-line{position:absolute;top:0;bottom:-1.5rem;left:50%;width:2px;background:var(--border);transform:translateX(-50%)}
.tl-row:first-child .tl-line{top:20px}
.tl-row:last-child .tl-line{bottom:auto;height:20px}
.tl-dot{width:14px;height:14px;border-radius:50%;background:var(--border);border:3px solid var(--bg-card);flex-shrink:0;margin-top:6px;position:relative;z-index:1;transition:all var(--transition)}
.tl-row:hover .tl-dot{background:var(--primary);box-shadow:0 0 0 6px rgba(99,102,241,.15)}
.tl-date{text-align:center;margin-top:.35rem}
.tl-date-day{display:block;font-size:1.2rem;font-weight:800;color:var(--text);line-height:1}
.tl-date-mon{display:block;font-size:.7rem;color:var(--text-muted);text-transform:uppercase;font-weight:600;letter-spacing:.5px}
.tl-date-year{display:block;font-size:.65rem;color:var(--text-muted)}
.tl-marker:not(.has-date) .tl-date{display:none}
.tl-marker:not(.has-date) .tl-dot{width:8px;height:8px;margin-top:12px}

/* Timeline post card */
.post-card-tl{flex:1;background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border-light);transition:all .35s cubic-bezier(.4,0,.2,1);min-width:0}
.post-card-tl:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.post-card-tl .post-card-link{display:flex;color:inherit;text-decoration:none}
.post-card-tl .post-card-link:hover{color:inherit}
.post-card-tl .post-card-cover{width:200px;min-height:140px;flex-shrink:0;position:relative;overflow:hidden;background:linear-gradient(135deg,#e0e7ff,#fae8ff)}
.post-card-tl .post-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;position:absolute;inset:0}
.post-card-tl:hover .post-card-cover img{transform:scale(1.06)}
.post-card-tl .post-card-cover-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:3rem;font-weight:800;color:rgba(99,102,241,.3);position:absolute;inset:0}
.post-card-tl .post-card-overlay{position:absolute;inset:0;background:rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s ease;color:#fff;font-weight:600;backdrop-filter:blur(2px)}
.post-card-tl:hover .post-card-overlay{opacity:1}
.post-card-tl .post-card-body{flex:1;padding:1rem 1.25rem;display:flex;flex-direction:column;justify-content:center;min-width:0}
.post-card-tl .post-card-title{font-size:1.05rem;font-weight:700;margin-bottom:.3rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-tl .post-card-summary{font-size:.82rem;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:.4rem;line-height:1.5}
.post-card-tl .post-card-tags{display:flex;flex-wrap:wrap;gap:.3rem;margin-bottom:.3rem}
.post-card-tl .mini-tag{font-size:.68rem;padding:.1rem .45rem;border-radius:999px;background:rgba(99,102,241,.08);color:var(--primary);font-weight:500;text-decoration:none;transition:all var(--transition)}
.post-card-tl .mini-tag:hover{background:rgba(99,102,241,.18);color:var(--primary-dark)}
.post-card-tl .edited-badge{font-size:.68rem;color:var(--text-muted)}
.post-card-tl .post-card-actions{display:flex;gap:.25rem;padding:.75rem 1rem 0 0;flex-shrink:0;align-self:flex-start}

/* ===== Tags Page ===== */
.tags-page{max-width:800px;margin:0 auto;padding:2rem 1.5rem 3rem}
.tags-title{font-size:1.8rem;font-weight:800;margin-bottom:2rem}
.tag-cloud-lg{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem}
.tag-card{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:1.5rem 1rem;border-radius:var(--radius-lg);background:var(--bg-card);border:2px solid var(--border-light);text-decoration:none;transition:all .3s cubic-bezier(.4,0,.2,1);text-align:center}
.tag-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.tag-card-icon{font-size:1.5rem;font-weight:800;color:var(--primary)}
.tag-card-name{font-size:1rem;font-weight:700;color:var(--text)}
.tag-card-count{font-size:.75rem;color:var(--text-muted)}

/* Size variants */
.tag-card.xlarge{grid-column:span 2;background:linear-gradient(135deg,#e0e7ff,#fae8ff);border-color:var(--primary-light)}
.tag-card.xlarge .tag-card-name{font-size:1.2rem}
.tag-card.xlarge .tag-card-count{font-size:.85rem;color:var(--primary)}
.tag-card.large{background:linear-gradient(135deg,#f8fafc,#e0e7ff)}
.tag-card.large .tag-card-name{font-size:1.05rem}

/* ===== Responsive Timeline ===== */
@media(max-width:700px){
    .tl-marker{width:60px}
    .tl-date-day{font-size:1rem}
    .post-card-tl .post-card-link{flex-direction:column}
    .post-card-tl .post-card-cover{width:100%;height:160px}
    .post-card-tl .post-card-actions{padding:.5rem 1rem 1rem}
    .posts-toolbar{flex-direction:column;align-items:stretch}
    .toolbar-right{flex-direction:column}
    .search-box{min-width:auto}
    .tag-cloud-lg{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}

/* ===== New Hero (image background) ===== */
.hero-section{position:relative;height:380px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;margin-bottom:0;padding:0}
.hero-bg{position:absolute;inset:0;background-size:cover!important;background-position:center!important;animation:breathe 8s ease-in-out infinite}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.55) 0%,rgba(15,23,42,.7) 100%)}
.hero-title{font-size:3rem;font-weight:800;color:#fff;letter-spacing:-1px;text-shadow:0 2px 20px rgba(0,0,0,.3);margin-bottom:.4rem}
.hero-subtitle{font-size:1.1rem;color:rgba(255,255,255,.7);margin-bottom:1.75rem;font-weight:400}
.btn-hero-create{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.12);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);color:#fff;padding:.8rem 2rem;border-radius:999px;font-weight:600;font-size:1rem;text-decoration:none;transition:all .3s ease}
.btn-hero-create:hover{background:rgba(255,255,255,.22);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,.25);color:#fff}

/* ===== Timeline card: no-cover mode ===== */
.post-card-tl.no-cover .post-card-link{flex-direction:column}
.post-card-tl.no-cover .post-card-body{border-left:3px solid var(--primary-light);margin:.5rem 0}
.post-card-tl.no-cover .post-card-title{font-size:1.1rem}
.post-card-tl.no-cover .post-card-summary{-webkit-line-clamp:3}

/* ===== Timeline card refinements ===== */
.post-card-tl .post-card-link{flex-direction:row;color:inherit;text-decoration:none}
.post-card-tl .post-card-link:hover{color:inherit}
.post-card-tl .post-card-cover{width:180px;min-height:130px;flex-shrink:0;position:relative;overflow:hidden;border-radius:var(--radius) 0 0 var(--radius);background:linear-gradient(135deg,#e0e7ff,#fae8ff)}
.post-card-tl .post-card-body{flex:1;padding:.9rem 1.25rem;display:flex;flex-direction:column;justify-content:center;min-width:0}
.post-card-footer{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin-top:.25rem}

/* Responsive hero */
@media(max-width:700px){
    .hero-section{height:260px}
    .hero-title{font-size:2rem}
    .hero-subtitle{font-size:.95rem}
    .tl-marker{width:55px}
    .tl-date-day{font-size:1rem}
    .post-card-tl .post-card-link{flex-direction:column}
    .post-card-tl .post-card-cover{width:100%;height:160px;border-radius:var(--radius-lg) var(--radius-lg) 0 0}
    .post-card-tl.no-cover .post-card-body{margin:.3rem 0}
    .post-card-tl .post-card-actions{padding:.5rem 1rem 1rem}
    .posts-toolbar{flex-direction:column;align-items:stretch}
    .toolbar-right{flex-direction:column}
    .search-box{min-width:auto}
}

/* Post count badge */
.post-count-badge{font-size:.75rem;font-weight:500;background:var(--border-light);color:var(--text-muted);padding:.15rem .65rem;border-radius:999px;margin-left:.5rem;vertical-align:middle}

/* ===== Reading Progress Bar ===== */
.reading-progress{position:fixed;top:0;left:0;width:100%;height:3px;z-index:9999;background:transparent}
.reading-progress-bar{height:100%;background:linear-gradient(90deg,var(--primary),#a855f7);width:0;transition:width .15s ease}

/* ===== Back to Top ===== */
.btn-back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--bg-card);border:2px solid var(--border);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:all .3s ease;box-shadow:var(--shadow-md);z-index:999}
.btn-back-to-top.visible{opacity:1;pointer-events:auto}
.btn-back-to-top:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow-lg)}

/* ===== Pinned Badge ===== */
.pinned-badge{display:inline-block;font-size:.7rem;background:linear-gradient(135deg,#f59e0b,#fbbf24);color:#fff;padding:.15rem .55rem;border-radius:999px;font-weight:600;margin-right:.35rem;vertical-align:middle}

/* ===== Draft Badge ===== */
.draft-badge{display:inline-block;font-size:.7rem;background:var(--border-light);color:var(--text-muted);padding:.15rem .55rem;border-radius:999px;font-weight:500;border:1px dashed var(--border)}

/* ===== Reading Time ===== */
.reading-time{font-size:.75rem;color:var(--text-muted)}

/* ===== Post Card Meta Row ===== */
.post-card-meta-row{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin-top:.2rem}

/* ===== Pin Button ===== */
.btn-pin{font-size:.85rem}
.btn-pin:hover{background:#fef3c7;color:#f59e0b;border-color:#fcd34d}

/* ===== Checkbox Label ===== */
.checkbox-label{display:flex!important;align-items:center;gap:.4rem;cursor:pointer;font-weight:600!important}
.checkbox-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary);cursor:pointer}

/* ===== Post Detail Tags ===== */
.post-detail-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.5rem}
.post-detail-tags .mini-tag{font-size:.75rem;padding:.2rem .6rem;border-radius:999px;background:rgba(99,102,241,.08);color:var(--primary);font-weight:500;text-decoration:none;transition:all var(--transition)}
.post-detail-tags .mini-tag:hover{background:rgba(99,102,241,.18)}

/* ===== Dark Mode ===== */
[data-theme="dark"]{--bg:#0f172a;--bg-card:#1e293b;--text:#e2e8f0;--text-secondary:#94a3b8;--text-muted:#64748b;--border:#334155;--border-light:#1e293b;--shadow-sm:0 1px 2px rgba(0,0,0,.3);--shadow:0 1px 3px rgba(0,0,0,.4);--shadow-md:0 4px 6px rgba(0,0,0,.4);--shadow-lg:0 10px 15px rgba(0,0,0,.5);--shadow-xl:0 20px 25px rgba(0,0,0,.5)}
[data-theme="dark"] .navbar{background:rgba(15,23,42,.9)!important}
[data-theme="dark"] .cover-upload-area:hover{background:rgba(99,102,241,.08)}
[data-theme="dark"] .btn-cancel{background:var(--border);color:var(--text-secondary)}
[data-theme="dark"] .btn-cancel:hover{background:var(--border);color:var(--text)}
[data-theme="dark"] .search-box{background:var(--bg-card)}
[data-theme="dark"] .search-box input{color:var(--text)}
[data-theme="dark"] .editor-content{background:var(--bg-card)}
[data-theme="dark"] .editor-toolbar{background:var(--bg)}
[data-theme="dark"] .form-input{background:var(--bg-card);color:var(--text)}
[data-theme="dark"] .post-card-tl{background:var(--bg-card)}
[data-theme="dark"] .post-detail-content blockquote{background:var(--border-light)}
[data-theme="dark"] .tag-filter-bar{background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(168,85,247,.1))}
[data-theme="dark"] .btn-tags-nav{background:var(--border)}
[data-theme="dark"] .btn-action{background:var(--border-light);border-color:var(--border)}
[data-theme="dark"] .btn-back-to-top{background:var(--bg-card);border-color:var(--border)}
[data-theme="dark"] .nav-link:hover{background:var(--border-light)!important}
[data-theme="dark"] .tag-card{background:var(--bg-card);border-color:var(--border)}
[data-theme="dark"] ::-webkit-scrollbar-track{background:var(--bg)}
[data-theme="dark"] ::-webkit-scrollbar-thumb{background:var(--border)}

/* Dark mode toggle button */
.btn-theme{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;border:2px solid var(--border);background:transparent;cursor:pointer;font-size:1.1rem;transition:all var(--transition);margin-left:.5rem}
.btn-theme:hover{background:var(--border-light);transform:rotate(20deg)}
[data-theme="dark"] .nav-link{color:var(--text-secondary)!important}
[data-theme="dark"] .nav-link:hover{color:var(--text)!important;background:var(--border-light)!important}
[data-theme="dark"] .navbar-toggler-icon{filter:invert(1)}

/* ===== Login Page ===== */
.login-page{display:flex;align-items:center;justify-content:center;min-height:70vh;padding:2rem}
.login-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:2.5rem 2rem;width:100%;max-width:400px;text-align:center;box-shadow:var(--shadow-lg);border:1px solid var(--border-light);animation:fadeInUp .5s ease}
.login-icon{font-size:3rem;margin-bottom:.5rem}
.login-card h2{font-size:1.5rem;margin-bottom:.3rem}
.login-desc{color:var(--text-muted);font-size:.9rem;margin-bottom:1.5rem}
.login-error{background:#fee2e2;color:var(--danger);padding:.6rem 1rem;border-radius:var(--radius-sm);font-size:.85rem;margin-bottom:1rem}
.login-form{display:flex;flex-direction:column;gap:.75rem}
.login-input{text-align:center;font-size:1.1rem;padding:.85rem}
.login-btn{width:100%;justify-content:center;font-size:1.05rem;padding:.85rem}
.login-back{display:inline-block;margin-top:1.25rem;color:var(--text-muted);font-size:.85rem;text-decoration:none}
.login-back:hover{color:var(--primary)}
.admin-login-link{opacity:.6;transition:opacity var(--transition)}
.admin-login-link:hover{opacity:1}

/* ===== Editor Redesign ===== */
.editor-page{max-width:860px;margin:0 auto;padding:2rem 1.5rem 4rem}
.editor-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.75rem;flex-wrap:wrap}
.editor-header .back-link{margin-bottom:0}
.editor-title{font-size:1.5rem;font-weight:800;flex:1}
.editor-word-count{font-size:.8rem;color:var(--text-muted);background:var(--border-light);padding:.2rem .7rem;border-radius:999px}
.editor-form{display:flex;flex-direction:column;gap:1rem}

/* Editor cards */
.editor-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:1.25rem 1.5rem;border:1px solid var(--border-light);transition:border-color var(--transition)}
.editor-card:focus-within{border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(99,102,241,.06)}
.editor-content-card{padding:0;overflow:hidden}
.editor-content-card .editor-label{padding:1.25rem 1.5rem .5rem;display:block}
.editor-meta-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.editor-card-half{display:flex;flex-direction:column;gap:.4rem}

/* Title input */
.editor-title-input{width:100%;border:none;font-size:1.8rem;font-weight:700;padding:0;outline:none;background:transparent;color:var(--text);font-family:inherit;letter-spacing:-.5px}
.editor-title-input::placeholder{color:var(--text-muted);font-weight:400}

/* Label */
.editor-label{font-size:.8rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:.25rem}

/* Inputs */
.editor-input{width:100%;border:1px solid var(--border);border-radius:var(--radius-sm);padding:.55rem .75rem;font-size:.9rem;font-family:inherit;outline:none;background:var(--bg);color:var(--text);transition:border-color var(--transition)}
.editor-input:focus{border-color:var(--primary-light)}
.editor-textarea{width:100%;border:1px solid var(--border);border-radius:var(--radius-sm);padding:.55rem .75rem;font-size:.9rem;font-family:inherit;outline:none;resize:vertical;min-height:60px;background:var(--bg);color:var(--text);transition:border-color var(--transition)}
.editor-textarea:focus{border-color:var(--primary-light)}

/* Tag chips */
.tag-chips{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.35rem;min-height:0}
.tag-chip{display:inline-flex;align-items:center;gap:.25rem;background:linear-gradient(135deg,#e0e7ff,#ddd6fe);color:var(--primary-dark);font-size:.78rem;padding:.2rem .55rem;border-radius:999px;font-weight:500;animation:popIn .2s ease}
.tag-chip-remove{background:none;border:none;color:var(--primary);cursor:pointer;font-size:1rem;line-height:1;padding:0 0 0 .15rem;opacity:.6;transition:opacity .15s}
.tag-chip-remove:hover{opacity:1}
[data-theme="dark"] .tag-chip{background:rgba(99,102,241,.2);color:var(--primary-light)}

@keyframes popIn{from{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}

/* Cover upload v2 */
.cover-upload{width:100%}
.cover-dropzone{position:relative;border:2px dashed var(--border);border-radius:var(--radius-lg);min-height:180px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition);overflow:hidden;background:var(--bg)}
.cover-dropzone:hover{border-color:var(--primary-light);background:rgba(99,102,241,.02)}
.cover-dropzone.drag-over{border-color:var(--primary);background:rgba(99,102,241,.06);transform:scale(1.01)}
.cover-placeholder{display:flex;flex-direction:column;align-items:center;gap:.5rem;color:var(--text-muted);font-size:.9rem}
.cover-dropzone img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;border-radius:calc(var(--radius-lg) - 2px)}
.cover-remove{position:absolute;top:.6rem;right:.6rem;z-index:2;width:28px;height:28px;border-radius:50%;background:rgba(0,0,0,.5);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}
.cover-remove:hover{background:var(--danger)}

/* Toolbar v2 */
.editor-toolbar{display:flex;align-items:center;gap:.15rem;flex-wrap:wrap;padding:.6rem 1rem;background:var(--bg);border-bottom:1px solid var(--border)}
.toolbar-group{display:flex;align-items:center;gap:.1rem}
.toolbar-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;background:transparent;border-radius:6px;cursor:pointer;font-size:.85rem;color:var(--text-secondary);transition:all .15s ease}
.toolbar-btn:hover{background:var(--border-light);color:var(--text)}
.toolbar-btn:active{background:var(--border)}
.toolbar-sep{width:1px;height:22px;background:var(--border);margin:0 .3rem;border-radius:1px}

/* Editor content v2 */
.editor-content{min-height:420px;padding:1.25rem 1.5rem;font-size:1.05rem;line-height:1.85;outline:none;color:var(--text)}
.editor-content:empty::before{content:attr(placeholder);color:var(--text-muted);pointer-events:none}
.editor-content h2{font-size:1.5rem;margin:1.5rem 0 .5rem;font-weight:700}
.editor-content h3{font-size:1.2rem;margin:1.2rem 0 .4rem;font-weight:600}
.editor-content p{margin-bottom:.8rem}
.editor-content img{max-width:100%;border-radius:var(--radius-sm);margin:.5rem 0}
.editor-content blockquote{border-left:3px solid var(--primary-light);padding:.5rem 1rem;margin:.8rem 0;color:var(--text-secondary);background:var(--border-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.editor-content ul,.editor-content ol{padding-left:1.5rem;margin:.5rem 0}

/* Bottom bar */
.editor-bottom-bar{display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border-light);position:sticky;bottom:1rem;box-shadow:var(--shadow-lg);z-index:100}
.editor-actions{margin-left:auto;display:flex;gap:.5rem}
.btn-cancel{padding:.6rem 1.5rem;border-radius:999px;font-weight:600;font-size:.9rem;border:1px solid var(--border);background:transparent;color:var(--text-secondary);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;transition:all var(--transition)}
.btn-cancel:hover{background:var(--border-light);color:var(--text)}

/* Sticky bottom bar spacer */
.editor-form{padding-bottom:5rem}

/* Responsive */
@media(max-width:700px){
    .editor-meta-row{grid-template-columns:1fr}
    .editor-title-input{font-size:1.4rem}
    .editor-card{padding:1rem 1.25rem}
    .editor-content{padding:1rem;min-height:300px}
    .editor-bottom-bar{flex-wrap:wrap;gap:.5rem;border-radius:var(--radius) var(--radius) 0 0;position:fixed;bottom:0;left:0;right:0;margin:0}
    .editor-page{padding-bottom:6rem}
}

/* Footer beian */
.footer-beian {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    font-size: 0.85rem;
}
.footer-beian .beian-sep {
    color: var(--border);
    user-select: none;
}
.footer-beian .beian-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}
.footer-beian .beian-link:hover {
    color: var(--primary);
    text-decoration: underline;
}
.footer-beian .police-beian {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}
.footer-beian .police-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}