/* ===== CSS Variables & Base ===== */
:root{
  --bg:#FAFAF8;--bg2:#F3F0EC;--card:#FFFFFF;--card2:#F8F6F3;
  --t1:#1A1A1A;--t2:#5C5C5C;--t3:#9E9E9E;--border:#E8E3DC;
  --shadow:0 1px 2px rgba(0,0,0,.03),0 4px 12px rgba(0,0,0,.04);
  --shadow-md:0 2px 8px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);
  --shadow-lg:0 4px 16px rgba(0,0,0,.06),0 16px 40px rgba(0,0,0,.08);
  --accent:#D45B6F;--accent2:#FDF2F4;
}
.dark{
  --bg:#111110;--bg2:#1C1C1A;--card:#222220;--card2:#2A2A28;
  --t1:#F0F0EE;--t2:#AAA9A6;--t3:#6F6E6C;--border:#333230;
  --shadow:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 2px 8px rgba(0,0,0,.35);--shadow-lg:0 4px 16px rgba(0,0,0,.4);
  --accent:#FB7189;--accent2:#2D1A1F;
}
*{box-sizing:border-box}body{margin:0;font-family:'Noto Sans SC',sans-serif;background:var(--bg);color:var(--t1);transition:background .3s,color .3s;min-height:100vh;-webkit-font-smoothing:antialiased}
::selection{background:var(--accent2);color:var(--accent)}
.gradient-text{background:linear-gradient(135deg,#D45B6F,#C08497,#A8D8EA);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.gradient-hero{background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.dark .gradient-hero{background:linear-gradient(180deg,#1A1616 0%,var(--bg) 100%)}
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);transition:all .35s cubic-bezier(.4,0,.2,1);overflow:hidden}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}

/* ===== Animations ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.anim-fadeup{animation:fadeUp .5s ease forwards;opacity:0}
@keyframes hashFlash{0%{background:transparent;box-shadow:0 0 0 0 rgba(253,230,138,0)}12%{background:rgba(253,230,138,.35);box-shadow:0 0 0 12px rgba(253,230,138,.45),0 0 0 24px rgba(251,113,137,.2)}25%{background:rgba(251,113,137,.15);box-shadow:0 0 0 0 rgba(253,230,138,0)}38%{background:rgba(253,230,138,.3);box-shadow:0 0 0 8px rgba(253,230,138,.4),0 0 0 18px rgba(251,113,137,.15)}50%{background:transparent;box-shadow:0 0 0 0 rgba(253,230,138,0)}100%{background:transparent;box-shadow:0 0 0 0 rgba(253,230,138,0)}}
.hash-target{animation:hashFlash 1.8s ease-in-out}

/* ===== Scrollbar ===== */
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;transition:background .2s}
::-webkit-scrollbar-thumb:hover{background:var(--accent);width:8px}

/* ===== Theme Toggle ===== */
.theme-toggle{width:44px;height:44px;border-radius:14px;border:1px solid var(--border);background:var(--card);cursor:pointer;font-size:0;display:flex;align-items:center;justify-content:center;transition:all .35s;box-shadow:var(--shadow);flex-shrink:0;overflow:hidden;position:relative}
.theme-toggle:hover{box-shadow:var(--shadow-md);border-color:var(--accent)}
.theme-toggle svg{transition:transform .4s cubic-bezier(.4,0,.2,1);position:relative;z-index:1}
.theme-toggle:active svg{transform:rotate(90deg) scale(.9)}
.theme-toggle::after{content:'';position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:var(--accent);opacity:.15;transform:translate(-50%,-50%);transition:width .5s,height .5s}
.theme-toggle:active::after{width:120px;height:120px}

/* ===== Brand Modal ===== */
.brand-modal-overlay{display:none;position:fixed;inset:0;z-index:999;background:rgba(0,0,0,.6);backdrop-filter:blur(6px);align-items:center;justify-content:center}
.brand-modal-overlay.active{display:flex}
.brand-modal{background:var(--card);border:1px solid var(--border);border-radius:24px;width:min(640px,94vw);max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg);padding:0}
.brand-modal-header{padding:24px 28px 16px;border-bottom:1px solid var(--border);position:relative}
.brand-modal-header h2{font-size:20px;font-weight:800;margin:0 0 4px}
.brand-modal-close{position:absolute;top:16px;right:20px;width:40px;height:40px;border-radius:50%;border:none;background:var(--bg2);color:var(--t2);font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.brand-modal-close:hover{background:var(--accent2);color:var(--accent);transform:scale(1.1)}
.brand-chart{padding:20px 28px 28px}
.brand-bar-row{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.brand-bar-label{width:90px;text-align:right;font-size:13px;font-weight:600;color:var(--t2);flex-shrink:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-bar-track{flex:1;height:28px;background:var(--bg2);border-radius:8px;overflow:hidden;position:relative}
.brand-bar-fill{height:100%;border-radius:8px;transition:width .6s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;justify-content:flex-end;padding-right:10px;min-width:32px}
.brand-bar-value{font-size:12px;font-weight:700;color:white;text-shadow:0 1px 2px rgba(0,0,0,.2)}
.clickable-stat{cursor:pointer;position:relative;transition:all .25s;border-radius:16px}
.clickable-stat:hover{background:var(--card2);box-shadow:0 0 0 4px var(--accent2)}

/* ===== Sidebar ===== */
.sidebar-toggle{position:fixed;left:0;top:50%;transform:translateY(-50%);z-index:100;width:36px;height:80px;border-radius:0 10px 10px 0;background:var(--accent);color:white;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;writing-mode:vertical-lr;letter-spacing:.1em;font-weight:700;box-shadow:2px 0 16px rgba(0,0,0,.12);transition:all .35s;font-family:inherit;opacity:1}
.sidebar-toggle:hover{width:42px;filter:brightness(1.1)}
.sidebar-toggle.hidden{opacity:0;pointer-events:none;transform:translateY(-50%) translateX(-8px)}
.sidebar-overlay{display:none;position:fixed;inset:0;z-index:90;background:rgba(0,0,0,.35);backdrop-filter:blur(2px)}
.sidebar-overlay.active{display:block}
.sidebar{position:fixed;left:-320px;top:0;bottom:0;width:320px;z-index:95;background:var(--card);border-right:1px solid var(--border);box-shadow:4px 0 24px rgba(0,0,0,.08);transition:left .3s cubic-bezier(.4,0,.2,1);overflow-y:auto;padding:0}
.sidebar.open{left:0}
.sidebar-header{padding:20px 20px 12px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.sidebar-header h3{font-size:16px;font-weight:800;margin:0}
.sidebar-close{width:32px;height:32px;border-radius:8px;border:none;background:var(--bg2);color:var(--t2);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.sidebar-close:hover{background:var(--accent2);color:var(--accent)}
.sb-section{border-bottom:1px solid var(--border)}
.sb-section-header{padding:14px 20px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:background .2s;user-select:none}
.sb-section-header:hover{background:var(--bg2)}
.sb-section-header .sb-icon{font-size:18px;margin-right:10px}
.sb-section-header .sb-label{font-size:14px;font-weight:700;flex:1}
.sb-section-header .sb-arrow{font-size:12px;color:var(--t3);transition:transform .25s}
.sb-section-header.open .sb-arrow{transform:rotate(180deg)}
.sb-section-body{display:none;padding:0 20px 12px}
.sb-section-body.open{display:block}
.sb-l2-item{padding:8px 14px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--t2);margin-bottom:2px;transition:all .2s;display:flex;align-items:center;justify-content:space-between}
.sb-l2-item:hover{background:var(--bg2);color:var(--t1);transform:translateX(3px)}
.sb-l2-item .sb-count{font-size:11px;background:var(--bg2);padding:2px 8px;border-radius:99px;color:var(--t3);font-weight:500}
.sb-l3-panel{display:none;position:fixed;left:320px;top:0;bottom:0;width:340px;z-index:94;background:var(--card);border-right:1px solid var(--border);box-shadow:4px 0 24px rgba(0,0,0,.06);overflow-y:auto;padding:0}
.sb-l3-panel.open{display:block}
.sb-l3-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}
.sb-l3-back{width:30px;height:30px;border-radius:8px;border:none;background:var(--bg2);color:var(--t2);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center}
.sb-l3-back:hover{background:var(--accent2);color:var(--accent)}
.sb-l3-header h4{font-size:15px;font-weight:700;margin:0;flex:1}
.sb-l3-body{padding:12px 20px}
.sb-news-item{padding:12px 14px;border-radius:10px;margin-bottom:8px;background:var(--bg2);border:1px solid var(--border);transition:all .2s}
.sb-news-item:hover{border-color:var(--accent)}
.sb-news-item .sn-title{font-size:13px;font-weight:600;color:var(--t1);line-height:1.4;margin-bottom:6px}
.sb-news-item .sn-meta{font-size:11px;color:var(--t3);display:flex;align-items:center;gap:8px;margin-bottom:8px}
.sb-news-item .sn-goto{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;color:var(--accent);cursor:pointer;padding:4px 10px;border-radius:6px;background:var(--accent2);border:none;font-family:inherit;transition:all .2s;box-shadow:none}
.sb-news-item .sn-goto:hover{filter:brightness(.95);transform:translateX(2px)}
.sb-sub-group{margin-bottom:10px}
.sb-sub-group-title{font-size:12px;font-weight:700;color:var(--t3);text-transform:uppercase;letter-spacing:.03em;padding:6px 0;margin-bottom:2px}

/* ===== Floating Buttons ===== */
.float-btns{position:fixed;right:24px;bottom:40px;z-index:80;display:flex;flex-direction:column;gap:12px}
.float-btn{width:44px;height:44px;border-radius:14px;border:1px solid var(--border);background:var(--card);color:var(--t2);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:all .3s;box-shadow:var(--shadow);opacity:.75;backdrop-filter:blur(8px);text-decoration:none}
.float-btn:hover{opacity:1;box-shadow:var(--shadow-md);color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
#backTopBtn{opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}
#backTopBtn.visible{opacity:.75;pointer-events:auto}
#backTopBtn.visible:hover{opacity:1}

/* ===== Responsive ===== */
@media(max-width:640px){
  .sidebar{width:280px;left:-280px}.sb-l3-panel{left:280px;width:calc(100vw - 280px)}
  .float-btns{right:12px;bottom:24px;gap:8px}.float-btn{width:40px;height:40px;border-radius:12px;font-size:16px}
  .brand-modal-header{padding:20px 20px 14px}
  .brand-modal-header h2{font-size:17px}
  .brand-chart{padding:14px 18px}
  .brand-bar-label{width:70px;font-size:12px}
}

/* ===== Empty State ===== */
.empty-state{padding:80px 20px;text-align:center;color:var(--t3)}

/* ===== Accessibility ===== */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ===== Page Transition ===== */
@keyframes pageIn{from{opacity:.6;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.page-enter{animation:pageIn .3s ease-out}

/* ===== Dark Mode Image Adaptation ===== */
.dark img:not(.lightbox img){filter:brightness(.92) contrast(1.05)}
.dark .img-expand{background:var(--bg2)!important}

/* ===== Skeleton Loading ===== */
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
.skeleton{background:linear-gradient(90deg,var(--bg2) 25%,var(--border) 50%,var(--bg2) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:12px}
.skeleton-card{height:200px;margin-bottom:16px}
.skeleton-h{height:20px;width:60%;margin-bottom:8px}
.skeleton-p{height:14px;width:100%;margin-bottom:6px}
.skeleton-p.short{width:70%}

/* ===== Loading Bar ===== */
.loading-bar{position:fixed;top:0;left:0;height:3px;z-index:9999;background:linear-gradient(90deg,#D45B6F,#C08497,#A8D8EA);width:0;transition:width .3s;box-shadow:0 1px 8px rgba(212,91,111,.4)}
.loading-bar.done{width:100%;opacity:0;transition:width .2s,opacity .4s}

/* ===== Toast ===== */
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%);z-index:9999;background:var(--card);border:1px solid var(--border);padding:12px 24px;border-radius:14px;font-size:14px;font-weight:600;color:var(--t1);box-shadow:var(--shadow-lg);animation:fadeUp .4s ease forwards;pointer-events:none}
@keyframes toastOut{from{opacity:1;transform:translateX(-50%) translateY(0)}to{opacity:0;transform:translateX(-50%) translateY(16px)}}

/* ===== Category Divider (Week Detail) ===== */
.cat-divider{display:flex;align-items:center;gap:12px;margin:32px 0 16px;padding:14px 20px;border-radius:14px;background:var(--card2);border:1px solid var(--border);scroll-margin-top:130px;box-shadow:var(--shadow)}
.cat-divider .cd-icon{font-size:22px;flex-shrink:0}
.cat-divider .cd-label{font-size:16px;font-weight:800;flex:1}
.cat-divider .cd-count{font-size:12px;color:var(--t3);font-weight:500;background:var(--bg);padding:3px 10px;border-radius:99px}
.cat-divider .cd-anchor{font-size:12px;color:var(--accent);cursor:pointer;padding:4px 10px;border-radius:6px;border:1px solid var(--accent2);background:var(--accent2);transition:all .2s;text-decoration:none;font-weight:600}

/* ===== Quick Nav (Week Detail) ===== */
.quick-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px;padding:14px 18px;border-radius:14px;background:var(--card2);border:1px solid var(--border);position:sticky;top:72px;z-index:40;backdrop-filter:blur(12px)}
.quick-nav a{font-size:12px;font-weight:600;padding:5px 12px;border-radius:8px;color:var(--t2);text-decoration:none;transition:all .2s;border:1px solid transparent}
.quick-nav a:hover{background:var(--accent2);color:var(--accent);border-color:var(--accent2)}

/* ===== Focus Trap Overlay ===== */
.focus-trap{position:fixed;inset:0;z-index:89;pointer-events:none}
.focus-trap.active{pointer-events:auto}

@media(max-width:640px){
  .quick-nav{gap:4px;padding:10px 12px}.quick-nav a{font-size:11px;padding:4px 8px}
}