/* JENIUS AI — Paper Archive (Academic Directory Style) */

/* ===================== LAYOUT ===================== */
.paper-archive-wrap{padding:24px 0 48px}
.paper-archive-layout{display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:start}

/* ===================== SIDEBAR ===================== */
.paper-sidebar{position:sticky;top:60px;max-height:calc(100vh - 80px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--c-brd) transparent}
.paper-sidebar-section{margin-bottom:20px;background:var(--c-bgc);border:1px solid var(--c-brd);border-radius:12px;overflow:hidden}
.sidebar-section-title{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;font-size:.82rem;font-weight:700;color:var(--c-tx);border-bottom:1px solid var(--c-brd);background:var(--c-bg2)}
.sidebar-topic-list{list-style:none;margin:0;padding:6px 0}
.sidebar-topic-list li{margin:0}
.sidebar-topic-link{display:flex;align-items:center;gap:8px;padding:7px 16px;font-size:.8rem;color:var(--c-tx2);text-decoration:none;transition:all .2s;border-left:3px solid transparent}
.sidebar-topic-link:hover{background:rgba(99,102,241,.04);color:var(--c-pri);border-left-color:rgba(99,102,241,.3)}
.sidebar-topic-link.active{background:rgba(99,102,241,.08);color:var(--c-pri);font-weight:600;border-left-color:var(--c-pri)}
.topic-badge-new{font-size:.55rem;font-weight:700;padding:1px 6px;border-radius:6px;background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;text-transform:uppercase;letter-spacing:.5px;margin-left:auto}
.area-abbrev{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:6px;background:var(--c-bg2);font-size:.6rem;font-weight:700;color:var(--c-tx3);flex-shrink:0}

/* ===================== MAIN ===================== */
.paper-main{min-width:0}

/* Sort Bar */
.paper-sort-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--c-bgc);border:1px solid var(--c-brd);border-radius:10px;margin-bottom:16px}
.sort-options{display:flex;gap:4px}
.sort-btn{padding:6px 14px;border-radius:8px;font-size:.78rem;font-weight:500;color:var(--c-tx2);text-decoration:none;transition:all .2s}
.sort-btn:hover{background:rgba(99,102,241,.06);color:var(--c-pri)}
.sort-btn.active{background:var(--c-pri);color:#fff;font-weight:600}
.sort-refresh{background:var(--c-bg2);border:1px solid var(--c-brd);padding:6px 14px;border-radius:8px;font-size:.78rem;color:var(--c-tx2);cursor:pointer;transition:all .2s}
.sort-refresh:hover{border-color:var(--c-pri);color:var(--c-pri)}

/* ===================== PAPER LIST ===================== */
.paper-list{display:flex;flex-direction:column;gap:12px}

.paper-item{display:flex;gap:16px;background:var(--c-bgc);border:1px solid var(--c-brd);border-radius:12px;padding:20px;transition:all .3s}
.paper-item:hover{border-color:var(--c-pri);box-shadow:0 4px 20px rgba(99,102,241,.08)}

/* Main Content */
.paper-item-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}

.paper-item-title{font-size:1rem;font-weight:700;margin:0;line-height:1.4}
.paper-item-title a{color:var(--c-tx);text-decoration:none;transition:color .2s}
.paper-item-title a:hover{color:var(--c-pri)}

/* Authors + Date */
.paper-item-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.paper-item-authors{display:flex;align-items:center;gap:4px;flex-wrap:wrap;font-size:.82rem}
.author-name{color:#6366f1;font-weight:500;cursor:pointer;transition:color .2s}
.author-name:hover{color:#4f46e5;text-decoration:underline}
.author-more{color:var(--c-tx3)}
.paper-item-date{font-size:.78rem;color:var(--c-tx3);margin-left:auto;white-space:nowrap}

/* Abstract */
.paper-item-abstract{font-size:.82rem;color:var(--c-tx2);line-height:1.6;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* Bottom Row */
.paper-item-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:10px;flex-wrap:wrap}

/* Tags */
.paper-item-tags{display:flex;flex-wrap:wrap;gap:5px}
.paper-tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.68rem;font-weight:600;border:1.5px solid;text-decoration:none;transition:all .2s;line-height:1.3}
/* Color cycle for tags */
.paper-tag:nth-child(6n+1){border-color:#818cf8;color:#6366f1;background:rgba(99,102,241,.06)}
.paper-tag:nth-child(6n+2){border-color:#f87171;color:#ef4444;background:rgba(239,68,68,.06)}
.paper-tag:nth-child(6n+3){border-color:#34d399;color:#10b981;background:rgba(16,185,129,.06)}
.paper-tag:nth-child(6n+4){border-color:#fbbf24;color:#d97706;background:rgba(217,119,6,.06)}
.paper-tag:nth-child(6n+5){border-color:#a78bfa;color:#7c3aed;background:rgba(124,58,237,.06)}
.paper-tag:nth-child(6n+6){border-color:#22d3ee;color:#0891b2;background:rgba(8,145,178,.06)}
.paper-tag:hover{transform:translateY(-1px)}
.paper-tag-diff{border-color:var(--c-brd);color:var(--c-tx3);background:var(--c-bg2)}

/* Action Buttons */
.paper-item-actions{display:flex;gap:6px;flex-shrink:0}
.paper-action-btn{display:inline-flex;align-items:center;gap:4px;padding:5px 12px;border:1px solid var(--c-brd);border-radius:8px;font-size:.72rem;font-weight:600;color:var(--c-tx2);text-decoration:none;transition:all .2s;background:var(--c-bgc)}
.paper-action-btn:hover{border-color:var(--c-pri);color:var(--c-pri);background:rgba(99,102,241,.04)}
.paper-action-pdf{border-color:#ef4444;color:#ef4444}
.paper-action-pdf:hover{background:rgba(239,68,68,.06);color:#dc2626}
.pa-icon{font-size:.82rem}

/* Popularity Score */
.paper-item-score{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:70px;flex-shrink:0;padding:8px;text-align:center}
.score-number{font-size:1.4rem;font-weight:800;color:var(--c-pri);line-height:1}
.score-fire{font-size:1rem;margin:4px 0 2px}
.score-label{font-size:.6rem;color:var(--c-tx3);text-transform:uppercase;letter-spacing:.5px}

/* Empty State */
.paper-empty{text-align:center;padding:60px 20px;background:var(--c-bgc);border:1px solid var(--c-brd);border-radius:12px}
.paper-empty .empty-icon{font-size:3rem;margin-bottom:12px}
.paper-empty h2{font-size:1.2rem;font-weight:700;margin:0 0 8px}
.paper-empty p{color:var(--c-tx3);font-size:.9rem;margin:0}

/* ===================== RESPONSIVE ===================== */
@media(max-width:900px){
    .paper-archive-layout{grid-template-columns:1fr}
    .paper-sidebar{position:static;max-height:none;display:flex;gap:12px;overflow-x:auto;padding-bottom:8px}
    .paper-sidebar-section{min-width:200px;flex-shrink:0;margin-bottom:0}
}
@media(max-width:640px){
    .paper-item{flex-direction:column}
    .paper-item-score{flex-direction:row;gap:6px;padding:8px 0;border-top:1px solid var(--c-brd2);justify-content:flex-start;min-width:auto}
    .score-number{font-size:1rem}
    .paper-item-bottom{flex-direction:column;align-items:flex-start}
    .paper-item-actions{width:100%}
    .paper-item-date{margin-left:0}
}