:root{
    --bg:#08111f; --bg-soft:#0d1728; --panel:#121d31; --panel-2:#0f192c; --line:rgba(255,255,255,0.08);
    --text:#f8fbff; --muted:#c4d0e4; --muted-2:#91a0ba; --brand:#3b82f6; --brand-2:#60a5fa;
    --success:#16a34a; --error:#dc2626;
}
html[data-theme="light"]{
    --bg:#f5f8fd; --bg-soft:#eaf1fb; --panel:#ffffff; --panel-2:#f8fbff; --line:rgba(15,23,42,0.08);
    --text:#101828; --muted:#475467; --muted-2:#667085; --brand:#2563eb; --brand-2:#60a5fa;
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{font-family:Arial,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;background:
radial-gradient(circle at top left, rgba(59,130,246,.12), transparent 28%),
radial-gradient(circle at top right, rgba(96,165,250,.09), transparent 26%),
linear-gradient(180deg,var(--bg-soft),var(--bg));color:var(--text);line-height:1.6}
code{font-family:Consolas,monospace;font-size:.95em}
a{text-decoration:none;color:inherit}.wrap{width:100%;overflow:hidden}.container{width:min(1200px, calc(100% - 40px));margin:0 auto}
.header{position:sticky;top:0;z-index:1000;background:rgba(7,12,22,.68);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
html[data-theme="light"] .header{background:rgba(245,248,253,.82)}
.header-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.premium-logo{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:900;letter-spacing:.05em}
.logo-mark{display:inline-flex;width:36px;height:36px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 10px 30px rgba(59,130,246,.25)}
.nav,.header-tools,.hero-actions,.footer-links,.hero-stats,.panel-list,.form-actions,.meta-list,.card-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.nav a{color:var(--muted);font-weight:800;font-size:14px}.nav a:hover,.footer-links a:hover{color:var(--text)}
.theme-switch,.btn,input,select,textarea{min-height:46px;border-radius:16px}
.theme-switch,.btn{display:inline-flex;align-items:center;justify-content:center;padding:0 18px}
.theme-switch{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);font-weight:800;cursor:pointer}
.btn{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:900;border:1px solid transparent;box-shadow:0 14px 30px rgba(59,130,246,.25)}
.btn.btn-line{background:transparent;border-color:var(--line);color:var(--text);box-shadow:none}
.btn.danger-btn{background:linear-gradient(135deg,#dc2626,#ef4444)}
.member-chip,.info-chip{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.06);font-size:13px;font-weight:800}
.admin-chip{background:rgba(59,130,246,.16);color:#dbeafe;border-color:rgba(59,130,246,.3)}
.hero{padding:90px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:stretch}
.eyebrow,.section-mini{color:var(--brand-2);font-size:12px;font-weight:900;letter-spacing:.18em;margin:0 0 12px}
.hero h1,.detail-title{margin:0 0 18px;font-size:clamp(34px,5vw,60px);line-height:1.1}
.hero-desc,.detail-lead{margin:0 0 24px;max-width:760px;color:var(--muted);font-size:18px}
.hero-showcase{display:grid;grid-template-rows:auto 1fr;gap:16px}
.showcase-card,.showcase-mini,.stat-box,.dashboard-card,.empty-box,.message-box,.upload-form,.detail-box,.image-wrap{
    border-radius:24px;background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
    border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.18)
}
html[data-theme="light"] .showcase-card,
html[data-theme="light"] .showcase-mini,
html[data-theme="light"] .stat-box,
html[data-theme="light"] .dashboard-card,
html[data-theme="light"] .empty-box,
html[data-theme="light"] .message-box,
html[data-theme="light"] .upload-form,
html[data-theme="light"] .detail-box,
html[data-theme="light"] .image-wrap{background:linear-gradient(180deg,#fff,#f8fbff)}
.showcase-main{padding:28px;display:flex;flex-direction:column;gap:12px;justify-content:flex-end;min-height:240px}
.showcase-main strong{font-size:32px;line-height:1.15}
.showcase-main p{margin:0;color:var(--muted)}
.showcase-label,.dashboard-label,.side-label{font-size:12px;font-weight:900;letter-spacing:.12em;color:var(--brand-2)}
.showcase-grid,.dashboard-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.showcase-mini,.dashboard-card{padding:22px}
.showcase-mini span,.dashboard-card span{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}
.showcase-mini strong{font-size:20px}
.dashboard-card strong{display:block;font-size:34px;line-height:1.05;margin-bottom:8px}
.dashboard-card p{margin:0;color:var(--muted)}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
.stat-box{padding:18px}
.stat-box strong{display:block;font-size:18px;margin-bottom:4px}.stat-box span,.empty-box p{color:var(--muted)}
.hero-panel{padding:28px;border-radius:26px;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.18)}
.hero-panel h2{margin:0 0 18px;font-size:24px}.panel-list{list-style:none;padding:0;margin:0;display:block}
.panel-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.panel-list li:last-child{border-bottom:none}
.panel-list li span{width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:rgba(59,130,246,.16);font-weight:900;color:var(--brand-2);flex:0 0 42px}
.panel-list strong{display:block;margin-bottom:2px}.panel-list p{margin:0;color:var(--muted)}
.section{padding:78px 0}.section-soft{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.00))}
.section-head{text-align:center;margin-bottom:30px}.section-head.align-left{text-align:left}
.section-head h2{margin:0;font-size:clamp(28px,4vw,44px);line-height:1.15}.section-head p{margin:10px 0 0;color:var(--muted)}
.upload-panel-shell{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:start}
.upload-form{padding:22px}
.premium-upload-form{border-radius:28px}
.upload-side-panel{display:grid;gap:16px}
.side-panel-card{padding:22px;border-radius:24px;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line)}
.side-panel-card strong{display:block;font-size:24px;margin:8px 0 10px}
.side-panel-card p{margin:0;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group.full{grid-column:1 / -1}
.form-group label{font-size:14px;font-weight:900;color:var(--muted)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:0 16px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text);outline:none}
.form-group textarea{padding:16px;min-height:160px}
.preview-box{padding:18px;border:1px dashed rgba(96,165,250,.35);border-radius:22px;background:rgba(255,255,255,.03);display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center;min-height:260px}
.hidden-preview{display:none}
.preview-box img{max-width:100%;max-height:340px;object-fit:contain;border-radius:18px}
.dropzone{padding:28px;border:2px dashed rgba(96,165,250,.35);border-radius:22px;background:rgba(255,255,255,.03);display:flex;flex-direction:column;gap:8px;align-items:center;justify-content:center;text-align:center}
.dropzone.dragover{border-color:var(--brand);background:rgba(59,130,246,.08)}
.attachment-file-list{width:100%;display:flex;flex-direction:column;gap:8px;margin-top:8px}
.attached-file-item{padding:11px 14px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);font-size:14px;color:var(--muted)}
.muted-small{font-size:13px;color:var(--muted)}
.message-box{padding:18px}
.message-box p{margin:0 0 8px}.message-box p:last-child{margin-bottom:0}.success-box{border-color:rgba(22,163,74,.45)} .error-box{border-color:rgba(220,38,38,.45)}
.search-filter-bar{display:grid;grid-template-columns:2fr 1fr auto;gap:18px;margin:0 0 28px;padding:20px;border-radius:24px;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line)}
.search-group{display:flex;flex-direction:column;gap:8px}
.search-group label{font-size:14px;font-weight:900;color:var(--muted)}
.search-group input,.search-group select{width:100%;padding:0 16px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text);outline:none;min-height:46px;border-radius:16px}
.search-actions{display:flex;align-items:flex-end;gap:12px;flex-wrap:wrap}
.board-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.board-card{border-radius:28px;overflow:hidden;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);transition:transform .22s ease,border-color .22s ease, box-shadow .22s ease;box-shadow:0 18px 36px rgba(0,0,0,.16)}
.board-card:hover{transform:translateY(-8px);border-color:rgba(96,165,250,.35);box-shadow:0 28px 54px rgba(0,0,0,.22)}
.thumb-preview,.thumb-placeholder{height:240px;background:rgba(255,255,255,.03);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}
.thumb-preview img,.project-image{width:100%;height:100%;object-fit:cover;display:block;cursor:pointer}
.file-icon.large{min-width:96px;height:96px;border-radius:24px;display:flex;align-items:center;justify-content:center;font-size:22px;background:linear-gradient(135deg,var(--brand),var(--brand-2));padding:0 14px;color:#fff;font-weight:900;text-align:center;box-shadow:0 16px 34px rgba(59,130,246,.28)}
.board-body{padding:24px}
.board-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.board-badge{display:inline-flex;min-height:30px;padding:0 12px;align-items:center;border-radius:999px;font-size:12px;font-weight:900;background:rgba(59,130,246,.14);border:1px solid rgba(59,130,246,.25);color:#dbeafe;letter-spacing:.04em}
.board-date{font-size:13px;color:var(--muted-2)}
.board-card h3{margin:0 0 12px;font-size:26px;line-height:1.25;word-break:break-all}
.board-desc{margin:0 0 14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta-list{display:flex;gap:10px;flex-wrap:wrap}
.meta-list span{font-size:12px;color:var(--muted-2);padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.card-link{display:inline-block;margin-top:14px;font-weight:900}
.muted-link{color:var(--muted)}
.danger-link{color:#f87171}
.empty-box{text-align:center;padding:34px}
.detail-wrap{max-width:980px}
.detail-box,.image-wrap{padding:20px}
.detail-list{margin:0 0 18px;padding-left:20px;color:var(--muted)}
.attachment-list{display:grid;grid-template-columns:1fr;gap:14px}
.attachment-item{display:flex;gap:14px;align-items:flex-start;padding:14px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.03)}
.attachment-thumb{width:120px;height:90px;object-fit:cover;border-radius:14px;cursor:pointer}
.attachment-meta{display:flex;flex-direction:column;gap:6px}
.attachment-meta span{color:var(--muted);font-size:14px}
.progress-wrap{margin-top:18px;padding:16px;border-radius:18px;border:1px solid var(--line);background:rgba(255,255,255,.03)}
.hidden-progress{display:none}
.progress-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.progress-head strong{font-size:14px}
.progress-head span{font-size:14px;color:var(--muted)}
.progress-bar{width:100%;height:14px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;border:1px solid var(--line)}
.progress-fill{width:0%;height:100%;background:linear-gradient(135deg,var(--brand),var(--brand-2));transition:width .18s ease}
.pagination{display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap;margin-top:30px}
.page-link{display:inline-flex;align-items:center;justify-content:center;min-width:46px;min-height:46px;padding:0 14px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);font-weight:800}
.active-page{background:linear-gradient(135deg,var(--brand),var(--brand-2));border-color:transparent;color:#fff}
.lightbox{position:fixed;inset:0;z-index:3000;display:flex;align-items:center;justify-content:center}
.hidden-lightbox{display:none}
.lightbox-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.82)}
.lightbox-content{position:relative;z-index:2;max-width:min(92vw,1200px);max-height:90vh;padding:18px;border-radius:24px;background:rgba(10,16,32,.96);border:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;gap:12px}
.lightbox-content img{max-width:100%;max-height:78vh;object-fit:contain;border-radius:14px}
.lightbox-content p{margin:0;color:#fff;text-align:center}
.lightbox-close{position:absolute;top:10px;right:10px;width:42px;height:42px;border-radius:999px;border:none;background:rgba(255,255,255,.12);color:#fff;font-size:28px;cursor:pointer}
.footer{padding:34px 0;border-top:1px solid var(--line);background:transparent}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer p{margin:6px 0 0;color:var(--muted-2)}
@media (max-width:1100px){.hero-grid,.upload-panel-shell{grid-template-columns:1fr}.board-grid,.hero-stats,.dashboard-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:768px){.container{width:min(100% - 28px,1200px)}.header-inner{padding:14px 0}.hero{padding:58px 0 38px}.hero-desc,.detail-lead{font-size:16px}.section{padding:58px 0}.board-grid,.hero-stats,.dashboard-grid,.form-grid,.search-filter-bar{grid-template-columns:1fr}.attachment-item{flex-direction:column}.attachment-thumb{width:100%;height:auto}}

.detail-hero{padding:64px 0 32px}
.detail-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
.detail-hero-copy,.detail-hero-side{display:flex;flex-direction:column;gap:16px}
.detail-hero-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.detail-meta-chip,.detail-side-card{
    padding:18px 20px;border-radius:22px;background:linear-gradient(180deg,var(--panel),var(--panel-2));
    border:1px solid var(--line);box-shadow:0 18px 36px rgba(0,0,0,.16)
}
.detail-meta-label{display:block;font-size:12px;font-weight:900;letter-spacing:.08em;color:var(--brand-2);margin-bottom:8px}
.detail-meta-chip strong,.detail-side-card strong{font-size:24px;line-height:1.15;display:block}
.detail-side-card p{margin:8px 0 0;color:var(--muted)}
.detail-premium-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);gap:24px;align-items:start}
.detail-main-column,.detail-side-column{display:flex;flex-direction:column;gap:22px}
.premium-visual-card,.premium-info-card{
    border-radius:28px;background:linear-gradient(180deg,var(--panel),var(--panel-2));
    border:1px solid var(--line);box-shadow:0 22px 54px rgba(0,0,0,.18)
}
.premium-visual-card{padding:20px}
.premium-visual-head,.premium-card-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.visual-badge{display:inline-flex;min-height:32px;padding:0 12px;align-items:center;border-radius:999px;font-size:12px;font-weight:900;background:rgba(59,130,246,.14);border:1px solid rgba(59,130,246,.25);color:#dbeafe}
.visual-hint{font-size:13px;color:var(--muted)}
.premium-visual-image-wrap{overflow:hidden;border-radius:22px;background:rgba(255,255,255,.03)}
.premium-detail-image{width:100%;height:auto;display:block;max-height:760px;object-fit:contain}
.premium-file-card{padding:28px;text-align:center}
.file-icon.huge{
    min-width:120px;height:120px;border-radius:30px;display:inline-flex;align-items:center;justify-content:center;
    font-size:28px;background:linear-gradient(135deg,var(--brand),var(--brand-2));padding:0 18px;color:#fff;
    font-weight:900;text-align:center;box-shadow:0 18px 38px rgba(59,130,246,.28);margin-bottom:16px
}
.premium-file-card h3{margin:0 0 10px;font-size:24px}
.premium-file-card p{margin:0;color:var(--muted)}
.premium-info-card{padding:24px}
.premium-card-head h3{margin:0;font-size:28px;line-height:1.15}
.premium-description{font-size:16px;line-height:1.9;color:var(--muted)}
.premium-attachment-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.premium-attachment-card{
    border-radius:22px;background:rgba(255,255,255,.04);border:1px solid var(--line);
    overflow:hidden;transition:transform .18s ease,border-color .18s ease
}
.premium-attachment-card:hover{transform:translateY(-4px);border-color:rgba(96,165,250,.35)}
.premium-attachment-thumb-wrap,.premium-attachment-filebox{height:220px;background:rgba(255,255,255,.03);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}
.premium-attachment-thumb{width:100%;height:100%;object-fit:cover;display:block;cursor:pointer}
.premium-attachment-body{padding:18px;display:flex;flex-direction:column;gap:8px}
.premium-attachment-body strong{font-size:18px;line-height:1.3;word-break:break-all}
.premium-attachment-body span{font-size:13px;color:var(--muted)}
.sticky-detail-card{position:sticky;top:98px}
.premium-info-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.premium-info-list li{
    display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)
}
.premium-info-list li:last-child{border-bottom:none}
.premium-info-list span{font-size:13px;color:var(--muted)}
.premium-info-list strong{font-size:14px;text-align:right;word-break:break-all}
.detail-side-actions{display:flex;flex-direction:column;gap:10px;margin-top:22px}
@media (max-width:1100px){
    .detail-hero-grid,.detail-premium-grid{grid-template-columns:1fr}
    .sticky-detail-card{position:static}
}
@media (max-width:768px){
    .detail-hero-meta,.premium-attachment-grid{grid-template-columns:1fr}
    .detail-hero{padding:46px 0 24px}
}

.no-pad-card{padding:0}
.with-inner-pad{padding:24px 24px 0}
.inner-pad-grid{padding:0 24px 24px}
.inner-pad-progress{margin:0 24px 24px}
.inner-pad-actions{padding:0 24px 24px}
.premium-delete-summary h4{margin:0 0 12px;font-size:28px;line-height:1.2}
.premium-delete-summary p{margin:0 0 18px;color:var(--muted);line-height:1.9}
.inline-file-card{margin-top:14px;padding:20px;display:flex;justify-content:center}
.delete-confirm-form{margin-top:22px}
.delete-tone-hero .detail-meta-chip,
.delete-tone-hero .detail-side-card,
.danger-sticky-card{
    border-color:rgba(239,68,68,.22);
    background:linear-gradient(180deg,rgba(127,29,29,.18),rgba(69,10,10,.12));
}
.danger-chip strong,
.danger-side-card strong{color:#fecaca}
.danger-sticky-card .premium-card-head h3{color:#fecaca}