:root{
  --red:#c53654;
  --gold:#e6d068;
  --blue:#36a2c5;
  --gray:#e5e5e5;
  --ink:#242424;
  --sub:#767676;
  --bg:#faf8f6;
  --white:#ffffff;
  --radius:12px;
  --shadow:0 3px 14px rgba(30,20,20,.06);
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{font-family:'Noto Sans JP','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;background:
  radial-gradient(circle at 1px 1px, rgba(197,54,84,.06) 1.4px, transparent 0) 0 0/22px 22px,
  var(--bg);color:var(--ink);font-size:14px;-webkit-font-smoothing:antialiased;}
@keyframes fadeInUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
@keyframes pulseDot{0%,100%{box-shadow:0 0 0 0 rgba(197,54,84,.5);}70%{box-shadow:0 0 0 6px rgba(197,54,84,0);}}
@keyframes floatBlob{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(10px,-14px) scale(1.06);}}
@keyframes sparkleTwinkle{0%,100%{opacity:.25;transform:scale(.7) rotate(0deg);}50%{opacity:1;transform:scale(1.15) rotate(20deg);}}
@keyframes badgePulse{0%,100%{transform:scale(1);}50%{transform:scale(1.08);}}
@keyframes confettiFall{0%{transform:translateY(0) rotate(0deg);opacity:1;}100%{transform:translateY(120px) rotate(340deg);opacity:0;}}
@keyframes popIn{0%{opacity:0;transform:scale(.4) rotate(-8deg);}60%{opacity:1;transform:scale(1.08) rotate(3deg);}100%{transform:scale(1) rotate(0deg);}}
#viewRoot.view-anim{animation:fadeInUp .35s ease both;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,textarea{font-family:inherit;outline:none;}
ul{list-style:none;}
img{max-width:100%;display:block;}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:#ddd;border-radius:8px;}

#app{display:flex;flex-direction:column;min-height:100vh;}

/* ---------- topbar ---------- */
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--gray);display:flex;align-items:center;padding:0 24px;gap:22px;position:sticky;top:0;z-index:80;}
.logo{font-weight:900;font-size:19px;letter-spacing:.02em;white-space:nowrap;background:linear-gradient(100deg,var(--red) 20%,#e06a3f 55%,var(--gold) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.logo .dot{background:none;-webkit-text-fill-color:var(--blue);color:var(--blue);}
.search-wrap{flex:1;max-width:440px;position:relative;}
.search-wrap svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--sub);pointer-events:none;}
.search-wrap input{width:100%;padding:9px 14px 9px 38px;border-radius:20px;border:1px solid var(--gray);background:var(--bg);font-size:13px;}
.search-wrap input:focus{border-color:var(--blue);background:#fff;}
.search-results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--gray);border-radius:10px;box-shadow:var(--shadow);max-height:340px;overflow-y:auto;z-index:90;}
.search-results .sr-item{padding:10px 14px;display:flex;align-items:center;gap:10px;cursor:pointer;border-bottom:1px solid #f2f2f2;font-size:12.5px;}
.search-results .sr-item:hover{background:var(--bg);}
.search-results .sr-empty{padding:16px;font-size:12.5px;color:var(--sub);text-align:center;}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:18px;flex-shrink:0;}
.role-switch{font-size:11.5px;border:1px solid var(--gray);border-radius:20px;padding:7px 14px;display:flex;gap:6px;align-items:center;font-weight:700;white-space:nowrap;max-width:44vw;overflow:hidden;text-overflow:ellipsis;}
.role-switch.admin{background:linear-gradient(100deg,var(--red),#e0667f);color:#fff;border-color:transparent;}
.bell-wrap{position:relative;color:var(--ink);cursor:pointer;}
.bell-wrap .dot{position:absolute;top:-1px;right:-1px;width:8px;height:8px;background:var(--red);border-radius:50%;border:2px solid #fff;animation:pulseDot 2.2s infinite;}
.avatar-block{display:flex;align-items:center;gap:9px;cursor:pointer;}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--gold);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#5a4a10;flex-shrink:0;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(197,54,84,.35);}
.avatar-name{font-size:12.5px;font-weight:700;line-height:1.3;white-space:nowrap;}
.avatar-role{font-size:10.5px;color:var(--sub);}
.hamburger-btn{display:none;width:34px;height:34px;border-radius:8px;align-items:center;justify-content:center;color:var(--ink);flex-shrink:0;}
.hamburger-btn:hover{background:var(--bg);}

/* ---------- layout ---------- */
.body-wrap{display:flex;flex:1;min-height:0;}
.sidebar{width:216px;background:#fff;border-right:1px solid var(--gray);padding:20px 0;flex-shrink:0;overflow-y:auto;}
.nav-label{font-size:10.5px;color:var(--sub);padding:0 22px;margin:16px 0 6px;letter-spacing:.08em;}
.nav-label:first-child{margin-top:0;}
.nav-item{display:flex;align-items:center;gap:10px;margin:2px 10px;padding:10px 14px;border-radius:10px;font-size:13.5px;color:var(--ink);cursor:pointer;transition:background .15s,transform .15s;}
.nav-item:hover{background:var(--bg);transform:translateX(2px);}
.nav-item.active{background:linear-gradient(100deg,var(--red),#e0667f);color:#fff;font-weight:700;box-shadow:0 4px 12px rgba(197,54,84,.32);}
.nav-item .dot-icon{width:6px;height:6px;border-radius:50%;background:var(--gray);flex-shrink:0;}
.nav-item.active .dot-icon{background:#fff;}

.sidebar-overlay{display:none;}
main{flex:1;padding:30px 34px 60px;overflow-y:auto;min-width:0;}
.page-head{margin-bottom:22px;}
.page-title{font-size:22px;font-weight:900;margin-bottom:6px;position:relative;display:inline-block;padding-left:14px;}
.page-title::before{content:'';position:absolute;left:0;top:3px;bottom:3px;width:5px;border-radius:4px;background:linear-gradient(180deg,var(--red),var(--gold));}
.page-sub{font-size:12.5px;color:var(--sub);}

/* ---------- common ---------- */
.card{background:#fff;border:1px solid var(--gray);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.grid{display:grid;gap:16px;}
.cols-2{grid-template-columns:repeat(2,1fr);}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:1100px){.cols-4{grid-template-columns:repeat(2,1fr);}.cols-3{grid-template-columns:repeat(2,1fr);}}

.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:24px;font-size:12.5px;font-weight:700;background:linear-gradient(100deg,var(--red),#e0667f);color:#fff;transition:transform .15s,box-shadow .15s;box-shadow:0 3px 10px rgba(197,54,84,.28);}
.btn:hover{transform:translateY(-2px) scale(1.035);box-shadow:0 6px 16px rgba(197,54,84,.4);}
.btn:active{transform:translateY(0) scale(.98);}
.btn.secondary{background:#fff;border:1px solid var(--gray);color:var(--ink);box-shadow:none;}
.btn.secondary:hover{box-shadow:0 4px 10px rgba(0,0,0,.08);}
.btn.blue{background:linear-gradient(100deg,var(--blue),#5cc2df);box-shadow:0 3px 10px rgba(54,162,197,.3);}
.btn.gold{background:linear-gradient(100deg,var(--gold),#f0dd8f);color:#4a3c0d;box-shadow:0 3px 10px rgba(230,208,104,.35);}
.btn.sm{padding:7px 14px;font-size:11.5px;}
.btn:disabled{opacity:.4;cursor:default;transform:none;}

.tag{display:inline-block;font-size:10.5px;padding:3px 10px;border-radius:20px;background:var(--bg);border:1px solid var(--gray);color:var(--sub);}
.tag.blue{background:#eaf6fa;color:var(--blue);border-color:transparent;font-weight:700;}
.badge-new{background:linear-gradient(100deg,var(--red),#ff8a63);color:#fff;font-size:9.5px;padding:3px 8px;border-radius:10px;font-weight:700;letter-spacing:.03em;box-shadow:0 2px 6px rgba(197,54,84,.35);display:inline-block;animation:badgePulse 1.6s ease-in-out infinite;}

.announce{position:relative;overflow:hidden;background:linear-gradient(120deg,#c53654,#e06a3f 55%,#e6d068);border-radius:var(--radius);padding:18px 22px;margin-bottom:22px;color:#fff;box-shadow:0 8px 22px rgba(197,54,84,.25);}
.announce::before{content:'';position:absolute;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.14);top:-70px;right:-40px;animation:floatBlob 8s ease-in-out infinite;}
.announce::after{content:'';position:absolute;width:100px;height:100px;border-radius:50%;background:rgba(255,255,255,.1);bottom:-50px;left:30%;animation:floatBlob 7s ease-in-out infinite reverse;}
.announce .a-item{position:relative;font-size:12.5px;padding:5px 0;display:flex;gap:10px;}
.announce .a-item .a-date{background:rgba(255,255,255,.25);padding:1px 8px;border-radius:10px;font-weight:700;flex-shrink:0;font-size:11px;}

.stat-row{margin-bottom:24px;}
.stat-card{background:#fff;border:1px solid var(--gray);border-radius:var(--radius);padding:18px;text-align:center;position:relative;overflow:hidden;transition:transform .18s,box-shadow .18s;}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.stat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:5px;background:var(--accent,var(--red));}
.stat-card .stat-icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin:2px auto 10px;background:color-mix(in srgb, var(--accent,var(--red)) 15%, #fff);color:var(--accent,var(--red));}
.stat-card .num{font-size:27px;font-weight:900;color:var(--accent,var(--red));}
.stat-card .lbl{font-size:11.5px;color:var(--sub);margin-top:5px;}

.section-title{font-size:14.5px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px;justify-content:flex-start;}
.section-title::before{content:'';width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--gold));flex-shrink:0;}
.section-title .more{font-size:11.5px;color:var(--blue);font-weight:700;cursor:pointer;margin-left:auto;}

.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;}
.chip{padding:7px 16px;border-radius:20px;border:1px solid var(--gray);font-size:12px;cursor:pointer;background:#fff;font-weight:500;transition:transform .15s,box-shadow .15s;}
.chip:hover{transform:translateY(-1px);}
.chip.active{background:linear-gradient(100deg,var(--ink),#4a4a4a);color:#fff;border-color:var(--ink);box-shadow:0 4px 10px rgba(0,0,0,.18);}

/* mock LP wireframe visual */
.mocklp{border:1px solid var(--gray);border-radius:9px;overflow:hidden;background:#fff;}
.mocklp .bar{height:7px;}
.mocklp .hero{height:88px;position:relative;}
.mocklp .hero .hero-badge{position:absolute;top:10px;left:10px;width:16px;height:16px;border-radius:50%;background:rgba(255,255,255,.55);}
.mocklp .hero .htxt{position:absolute;bottom:10px;left:10px;right:10px;height:9px;border-radius:4px;background:rgba(255,255,255,.85);width:70%;}
.mocklp .lines{padding:10px 12px 0;display:flex;flex-direction:column;gap:6px;}
.mocklp .line{height:6px;border-radius:4px;background:var(--gray);}
.mocklp .cta{margin:10px 12px 12px;height:22px;border-radius:6px;display:flex;align-items:center;justify-content:center;}
.mocklp .cta .ctxt{width:44%;height:7px;border-radius:4px;background:rgba(255,255,255,.85);}

.article-card,.video-card,.gallery-card,.zukan-card,.file-row,.assignment-card{background:#fff;border:1px solid var(--gray);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:box-shadow .2s,transform .2s;}
.article-card,.video-card,.gallery-card,.zukan-card,.assignment-card{transition:transform .22s cubic-bezier(.34,1.56,.64,1),box-shadow .22s;}
.article-card:hover,.video-card:hover,.gallery-card:hover,.zukan-card:hover,.assignment-card:hover{box-shadow:0 16px 28px -10px var(--accent,rgba(197,54,84,.45));transform:translateY(-6px) rotate(-.6deg) scale(1.015);}
.assignment-card .asg-body{padding:14px;}
.asg-status-row{display:flex;align-items:center;justify-content:space-between;margin-top:12px;}

details.qsection{border:1px solid var(--gray);border-radius:12px;margin-bottom:12px;overflow:hidden;background:#fff;}
details.qsection summary{padding:13px 18px;font-weight:700;font-size:13.5px;cursor:pointer;background:var(--bg);list-style:none;display:flex;align-items:center;justify-content:space-between;}
details.qsection summary::-webkit-details-marker{display:none;}
details.qsection summary::after{content:'+';font-size:17px;color:var(--sub);font-weight:400;}
details.qsection[open] summary::after{content:'−';}
details.qsection[open] summary{border-bottom:1px solid var(--gray);}
.qsection .q-body{padding:16px 18px;}
.q-item{margin-bottom:16px;}
.q-item:last-child{margin-bottom:0;}
.q-item .q-text{font-size:12.5px;font-weight:700;margin-bottom:7px;line-height:1.6;}
.q-item textarea{width:100%;border:1px solid var(--gray);border-radius:8px;padding:9px 12px;font-size:12.5px;min-height:60px;resize:vertical;line-height:1.6;}
.q-item textarea:focus{border-color:var(--blue);}
.q-item .q-answer{font-size:12.5px;color:#333;background:var(--bg);border-radius:8px;padding:9px 12px;line-height:1.7;}
.q-item .q-answer.empty{color:var(--sub);font-style:italic;}
.article-card .a-body,.gallery-card .g-body,.zukan-card .z-body{padding:14px;}
.article-card .a-thumb{aspect-ratio:1280/670;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:14px 20px;gap:8px;clip-path:polygon(7% 0%,93% 0%,100% 28%,100% 72%,93% 100%,7% 100%,0% 72%,0% 28%);}
.article-card .a-thumb .at-eyebrow{font-size:11px;font-weight:700;letter-spacing:.1em;color:rgba(255,255,255,.78);}
.article-card .a-thumb .at-eyebrow span{color:rgba(255,255,255,.5);}
.article-card .a-thumb .at-title{font-size:20px;font-weight:900;color:#fff;line-height:1.4;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.article-card .a-thumb .at-cat{font-family:'Yomogi',cursive;font-size:26px;color:var(--gold);line-height:1;}
.article-card h4{font-size:13.5px;margin:10px 0 6px;line-height:1.5;}
.article-card p{font-size:11.5px;color:var(--sub);line-height:1.6;}
.article-meta{display:flex;gap:8px;align-items:center;margin-top:10px;}
.article-meta .date{font-size:10.5px;color:var(--sub);margin-left:auto;}
.bookmark-btn{color:var(--gray);flex-shrink:0;}
.bookmark-btn.active{color:var(--gold);}

.video-thumb{aspect-ratio:1280/670;background:#20242a;display:flex;align-items:center;justify-content:center;color:#fff;position:relative;overflow:hidden;}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;}
.video-thumb .play-circle{position:relative;z-index:2;width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.16);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;transition:transform .2s,background .2s;}
.video-card:hover .play-circle{transform:scale(1.1);background:rgba(255,255,255,.28);}
.video-thumb .dur{position:absolute;z-index:2;bottom:8px;right:8px;background:rgba(0,0,0,.6);font-size:10px;padding:2px 6px;border-radius:4px;}
.video-card .v-body{padding:12px 14px;}
.video-card h4{font-size:13px;margin-bottom:6px;line-height:1.5;}

.zukan-card .z-comment{background:var(--bg);border-radius:8px;padding:10px 12px;font-size:11.5px;color:var(--ink);line-height:1.7;margin-top:10px;border-left:3px solid var(--blue);}

.file-row{display:flex;align-items:center;gap:14px;padding:14px 16px;margin-bottom:10px;cursor:default;}
.file-icon{width:38px;height:38px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:10px;font-weight:700;flex-shrink:0;}
.file-row .f-meta{font-size:11px;color:var(--sub);margin-top:2px;}
.file-row .f-name{font-size:13px;font-weight:700;}

/* chat */
.chat-wrap{display:flex;flex-direction:column;height:calc(100vh - 200px);background:#fff;border:1px solid var(--gray);border-radius:var(--radius);overflow:hidden;}
.chat-head{padding:14px 18px;border-bottom:1px solid var(--gray);display:flex;align-items:center;gap:10px;font-weight:700;font-size:13.5px;}
.chat-log{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px;}
.msg{padding:10px 14px;border-radius:15px;font-size:12.8px;line-height:1.65;}
.msg.me{align-self:flex-end;background:linear-gradient(100deg,var(--red),#e0667f);color:#fff;border-bottom-right-radius:4px;}
.msg.them{align-self:flex-start;background:var(--bg);border-bottom-left-radius:4px;}
.msg .time{font-size:9.5px;opacity:.65;margin-top:5px;display:block;}
.chat-input{border-top:1px solid var(--gray);padding:12px;display:flex;gap:10px;}
.chat-input input{flex:1;border:1px solid var(--gray);border-radius:20px;padding:10px 16px;font-size:13px;}
.chat-input input:focus{border-color:var(--blue);}

/* report */
.report-form textarea{width:100%;border:1px solid var(--gray);border-radius:8px;padding:12px;font-size:13px;min-height:100px;resize:vertical;}
.report-form input[type=text]{width:100%;border:1px solid var(--gray);border-radius:8px;padding:10px 12px;font-size:13px;margin-bottom:10px;}
.report-item{border-bottom:1px solid var(--gray);padding:14px 0;}
.report-item:last-child{border-bottom:none;}
.report-item .r-date{font-size:11px;color:var(--sub);margin-bottom:4px;}
.report-item .r-title{font-size:13.5px;font-weight:700;margin-bottom:4px;}
.report-item .r-content{font-size:12.5px;color:#444;line-height:1.7;}

/* admin table */
table{width:100%;border-collapse:collapse;font-size:12.8px;}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--gray);}
th{color:var(--sub);font-weight:700;font-size:11.5px;}
tr:hover td{background:var(--bg);}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;}
.status-dot.done{background:var(--blue);}
.status-dot.pending{background:var(--gray);}

/* chat attachments & message actions */
.msg-file{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.18);border-radius:8px;padding:8px 10px;font-size:11.5px;margin-top:6px;}
.msg.them .msg-file{background:#fff;border:1px solid var(--gray);}
.msg-wrap{display:flex;flex-direction:column;max-width:62%;}
.msg-wrap.me{align-self:flex-end;}
.msg-wrap.them{align-self:flex-start;}
.msg-actions{display:none;gap:8px;margin-top:3px;font-size:10.5px;}
.msg-wrap.me:hover .msg-actions{display:flex;justify-content:flex-end;}
.msg-actions button{color:var(--sub);font-size:10.5px;text-decoration:underline;}
.msg-actions button:hover{color:var(--red);}
.attach-btn{color:var(--sub);flex-shrink:0;padding:8px;border-radius:50%;}
.attach-btn:hover{background:var(--bg);color:var(--red);}

/* checklist */
.checklist-item{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:13px;border-bottom:1px solid var(--gray);}
.checklist-item:last-child{border-bottom:none;}
.checkbox{width:19px;height:19px;border-radius:6px;border:2px solid var(--gray);display:flex;align-items:center;justify-content:center;flex-shrink:0;cursor:pointer;color:#fff;transition:transform .15s;}
.checkbox:hover{transform:scale(1.1);}
.checkbox.checked{background:linear-gradient(135deg,var(--blue),#5cc2df);border-color:transparent;}
.checklist-item.checked .cl-text{text-decoration:line-through;color:var(--sub);}

/* modal */
.modal-overlay{position:fixed;inset:0;background:rgba(20,15,15,.55);display:flex;align-items:center;justify-content:center;z-index:200;padding:24px;}
.modal{background:#fff;border-radius:16px;max-width:660px;width:100%;max-height:88vh;overflow-y:auto;padding:30px;position:relative;}
.modal .close-btn{position:absolute;top:18px;right:18px;color:var(--sub);}
.modal h2{font-size:18px;font-weight:900;margin-bottom:10px;padding-right:26px;}
.modal .modal-meta{display:flex;gap:8px;margin-bottom:16px;}
.modal .modal-body{font-size:13.3px;line-height:1.95;color:#333;}
.modal .modal-body p{margin-bottom:14px;}

.hint-box{font-size:11.5px;color:var(--sub);background:var(--bg);border-radius:8px;padding:10px 14px;margin-top:16px;line-height:1.7;}

.form-group{margin-bottom:16px;}
.form-group label{display:block;font-size:12px;font-weight:700;margin-bottom:6px;}
.form-group input[type=text],.form-group input[type=url],.form-group select,.form-group textarea{width:100%;border:1px solid var(--gray);border-radius:8px;padding:9px 12px;font-size:13px;}
.form-group textarea{min-height:72px;resize:vertical;line-height:1.6;}
.thumb-preview img{width:100%;border-radius:8px;margin-top:10px;aspect-ratio:1280/670;object-fit:cover;}

.rich-editor-toolbar{margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.rich-editor-toolbar .rt-hint{font-size:11px;color:var(--sub);}
.rich-editor{min-height:170px;max-height:440px;overflow-y:auto;border:1px solid var(--gray);border-radius:8px;padding:12px 14px;font-size:13.5px;line-height:1.9;background:#fff;transition:border-color .15s,background .15s;}
.rich-editor:focus{outline:none;border-color:var(--blue);}
.rich-editor:empty:before{content:attr(data-placeholder);color:#aaa;}
.rich-editor.drag-over{border-color:var(--red);background:rgba(197,54,84,.05);}
.rich-editor img{max-width:100%;border-radius:8px;display:block;margin:10px 0;}
.rich-editor p{margin-bottom:1em;}

.back-link{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;color:var(--sub);cursor:pointer;margin-bottom:16px;}
.back-link:hover{color:var(--red);}
.article-detail{background:#fff;border:1px solid var(--gray);border-radius:16px;padding:36px 40px;max-width:760px;box-shadow:var(--shadow);}
.article-detail .ad-meta{display:flex;gap:8px;margin-bottom:14px;}
.article-detail h1{font-size:23px;font-weight:900;line-height:1.5;margin-bottom:22px;padding-bottom:22px;border-bottom:1px solid var(--gray);}
.article-detail .ad-body{font-size:14.5px;line-height:2.15;color:#333;max-width:64ch;}
.article-detail .ad-body p{margin-bottom:1.4em;}
.article-detail .ad-actions{margin-top:28px;padding-top:22px;border-top:1px solid var(--gray);}
@media(max-width:900px){.article-detail{padding:24px 22px;}}

.hero-banner{position:relative;overflow:hidden;border-radius:18px;padding:30px 32px;margin-bottom:22px;color:#fff;background:linear-gradient(120deg,#c53654 0%,#d1526a 35%,#e0667f 60%,#e6d068 130%);box-shadow:0 12px 30px rgba(197,54,84,.28);}
.hero-banner::before{content:'';position:absolute;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.13);top:-90px;right:-30px;animation:floatBlob 9s ease-in-out infinite;}
.hero-banner::after{content:'';position:absolute;width:140px;height:140px;border-radius:50%;background:rgba(54,162,197,.35);bottom:-70px;right:120px;animation:floatBlob 10s ease-in-out infinite reverse;}
.hero-banner .hb-eyebrow{position:relative;font-size:11.5px;font-weight:700;letter-spacing:.08em;background:rgba(255,255,255,.22);display:inline-block;padding:4px 12px;border-radius:20px;margin-bottom:12px;}
.hero-banner h1{position:relative;font-size:25px;font-weight:900;margin-bottom:8px;line-height:1.4;}
.hero-banner p{position:relative;font-size:12.8px;opacity:.92;max-width:520px;line-height:1.7;}
.hero-banner .hb-sparkle{position:absolute;color:#fff;opacity:.8;animation:sparkleTwinkle 2.4s ease-in-out infinite;pointer-events:none;}
.confetti-piece{position:fixed;top:0;width:9px;height:9px;border-radius:2px;pointer-events:none;z-index:9999;animation:confettiFall 1.1s ease-in forwards;}

.progress-ring-wrap{display:flex;align-items:center;gap:18px;}
.progress-ring-wrap .pr-num{font-size:22px;font-weight:900;fill:var(--ink);}
.progress-ring-wrap .pr-label{font-size:11.5px;color:var(--sub);}
.two-col{display:grid;grid-template-columns:1.3fr .9fr;gap:20px;align-items:start;}
@media(max-width:900px){.two-col{grid-template-columns:1fr;}}
.mt24{margin-top:24px;}
.mb14{margin-bottom:14px;}

/* ---------- responsive (tablet / mobile) ---------- */
@media(max-width:860px){
  .hamburger-btn{display:flex;}
  .sidebar{position:fixed;top:64px;left:0;bottom:0;z-index:120;transform:translateX(-100%);transition:transform .25s ease;box-shadow:0 0 24px rgba(0,0,0,.18);}
  .sidebar.open{transform:translateX(0);}
  .sidebar-overlay.open{display:block;position:fixed;top:64px;left:0;right:0;bottom:0;background:rgba(20,15,15,.45);z-index:110;}
  .search-wrap{max-width:none;}
  .avatar-name,.avatar-role{display:none;}
  .role-switch{font-size:10px;padding:6px 10px;}
  main{padding:20px 16px 60px;}
  .grid.cols-3,.grid.cols-2{grid-template-columns:repeat(2,1fr);}
  .stat-row.grid.cols-4{grid-template-columns:repeat(2,1fr);}
  .article-detail{padding:22px 18px;}
  .chat-wrap{height:calc(100vh - 220px);}
  .msg-wrap{max-width:82%;}
}
@media(max-width:560px){
  .topbar{flex-wrap:wrap;height:auto;min-height:64px;padding:10px 12px;gap:8px 10px;}
  .logo{font-size:15px;}
  .search-wrap{order:5;flex-basis:100%;max-width:none;}
  .search-wrap input{font-size:12px;}
  .role-switch .rs-sub{display:none;}
  .role-switch{max-width:38vw;}
  .grid.cols-3,.grid.cols-2,.grid.cols-4,.stat-row.grid.cols-4{grid-template-columns:1fr;}
  .grid.assignment-grid{grid-template-columns:repeat(2,1fr);gap:10px;}
  .assignment-card .asg-body{padding:10px;}
  .assignment-card .asg-body h4{font-size:12px;}
  .assignment-card .asg-body p{display:none;}
  .article-detail{padding:20px 16px;}
  .file-row{flex-wrap:wrap;}
  .modal{padding:22px 18px;border-radius:14px;}
  .hero-banner{padding:24px 20px;}
  .hero-banner h1{font-size:20px;}
}

/* =======================================================
   ログイン画面
======================================================= */
#loginScreen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(circle at 1px 1px, rgba(197,54,84,.06) 1.4px, transparent 0) 0 0/22px 22px, var(--bg);}
.login-card{width:100%;max-width:380px;background:#fff;border-radius:18px;padding:38px 32px;box-shadow:0 16px 40px rgba(30,20,20,.1);border:1px solid var(--gray);}
.login-card .logo{font-size:20px;font-weight:900;color:var(--red);text-align:center;margin-bottom:6px;}
.login-card .logo .dot{color:var(--gold);}
.login-card .login-sub{font-size:12.5px;color:var(--sub);text-align:center;margin-bottom:26px;}
.login-card .form-group{margin-bottom:14px;}
.login-card .btn{width:100%;justify-content:center;margin-top:6px;}
.login-error{background:#fdeceb;color:#c0392b;font-size:12.5px;padding:9px 12px;border-radius:8px;margin-bottom:14px;}
.login-loading{text-align:center;padding:60px 0;color:var(--sub);font-size:13px;}
#app.hidden, #loginScreen.hidden{display:none;}

/* =======================================================
   アップロード中の表示・トースト通知
======================================================= */
img[data-uploading]{opacity:.55;filter:grayscale(.3);}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#242424;color:#fff;padding:11px 20px;border-radius:24px;font-size:12.5px;box-shadow:0 8px 24px rgba(0,0,0,.25);z-index:10000;animation:fadeInUp .25s ease;}
.loading-row{text-align:center;padding:40px 0;color:var(--sub);font-size:13px;}
.temp-password-box{background:var(--bg);border:1px dashed var(--red);border-radius:10px;padding:14px 16px;font-size:14px;font-weight:700;text-align:center;letter-spacing:.04em;margin:12px 0;}