/* Agent Arena X — Global Styles */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#09090b;--surface:#18181b;--surface2:#27272a;--surface3:#303035;
  --border:#3f3f46;--border2:#52525b;
  --text:#fafafa;--text2:#a1a1aa;--text3:#71717a;
  --accent:#f97316;--accent2:#fb923c;--accent-dim:rgba(249,115,22,.12);
  --purple:#a855f7;--purple-dim:rgba(168,85,247,.12);
  --cyan:#22d3ee;--cyan-dim:rgba(34,211,238,.12);
  --green:#4ade80;--green-dim:rgba(74,222,128,.12);
  --red:#ef4444;--red-dim:rgba(239,68,68,.12);
  --yellow:#fbbf24;--yellow-dim:rgba(251,191,36,.12);
  --sidebar-w:250px;
}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden;line-height:1.6;min-height:100vh}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:.65rem 1rem;font-size:.9rem;outline:none;transition:border-color .2s;width:100%}
input[type="checkbox"],input[type="radio"]{width:auto;padding:0;border-radius:3px}
input:focus,textarea:focus,select:focus{border-color:var(--accent)}
textarea{resize:vertical;min-height:80px}
select{cursor:pointer}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* Layout */
.app-layout{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);position:fixed;top:0;left:0;bottom:0;display:flex;flex-direction:column;z-index:100;transition:transform .3s}
.sidebar-header{padding:1.2rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.6rem}
.sidebar-logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--purple));display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:900;flex-shrink:0}
.sidebar-title{font-weight:800;font-size:1.05rem}
.sidebar-nav{flex:1;padding:1rem .75rem;display:flex;flex-direction:column;gap:.25rem;overflow-y:auto}
.nav-item{display:flex;align-items:center;gap:.75rem;padding:.7rem 1rem;border-radius:10px;font-size:.9rem;font-weight:500;color:var(--text2);transition:all .2s;cursor:pointer}
.nav-item:hover{background:var(--surface2);color:var(--text)}
.nav-item.active{background:var(--accent-dim);color:var(--accent);font-weight:600}
.nav-item .icon{font-size:1.15rem;width:24px;text-align:center}
.nav-item-static{pointer-events:none}
a.nav-item{text-decoration:none}
a.sidebar-sub-item{text-decoration:none}
.nav-divider{height:1px;background:var(--border);margin:.75rem .5rem}
.sidebar-add-btn{margin-left:auto;width:24px;height:24px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;color:var(--text2);background:var(--surface2);border:1px solid var(--border);transition:all .2s;flex-shrink:0;cursor:pointer;line-height:1;padding:0}
.sidebar-add-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.sidebar-sub-list{padding:0 .5rem .25rem 2.6rem;display:flex;flex-direction:column;gap:.1rem}
.sidebar-sub-item{font-size:.78rem;color:var(--text3);padding:.3rem .5rem;border-radius:6px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:all .2s;display:flex;align-items:center;gap:.4rem}
.sidebar-sub-item:hover{color:var(--text);background:var(--surface2)}
.sidebar-sub-item.active{color:var(--accent)}
.sidebar-sub-item .sub-score{margin-left:auto;font-weight:700;font-size:.7rem;color:var(--text3);flex-shrink:0}
.sidebar-sub-item .sub-rank{width:16px;text-align:center;font-weight:800;flex-shrink:0}
.sidebar-footer{padding:1rem 1.5rem;border-top:1px solid var(--border)}

/* Sidebar Resize Handle */
.sidebar-resize-handle{position:fixed;top:0;bottom:0;width:6px;cursor:col-resize;z-index:101;transition:background .2s}
.sidebar-resize-handle:hover,.sidebar-resize-handle.dragging{background:var(--accent)}
.sidebar-resize-handle::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:40px;background:var(--border);border-radius:1px;transition:background .2s}
.sidebar-resize-handle:hover::after,.sidebar-resize-handle.dragging::after{background:var(--accent)}

/* Main */
.main-content{flex:1;margin-left:var(--sidebar-w);min-height:100vh}
.page-header{padding:1.25rem 2rem;border-bottom:1px solid var(--border);background:rgba(24,24,27,.6);backdrop-filter:blur(12px);position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.page-title{font-size:1.3rem;font-weight:800;display:flex;align-items:center;gap:.6rem}
.page-content{padding:2rem}

/* Mobile toggle */
.mobile-toggle{display:none;position:fixed;top:1rem;left:1rem;z-index:200;width:40px;height:40px;border-radius:10px;background:var(--surface);border:1px solid var(--border);align-items:center;justify-content:center;font-size:1.2rem}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:99}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:1.5rem;transition:all .3s}
.card:hover{border-color:var(--border2)}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.card-title{font-weight:700;font-size:1rem}
.league-card{cursor:pointer}
.league-card:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,.2)}
.submission-card{cursor:pointer}
.submission-card:hover{border-color:var(--accent)}

/* List items */
.list-item{display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.7rem 0;border-bottom:1px solid rgba(63,63,70,.3);cursor:pointer}
.list-item:last-child{border-bottom:none}
.list-item:hover{opacity:.85}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.3rem;border-radius:10px;font-weight:600;font-size:.85rem;transition:all .3s}
.btn-primary{background:linear-gradient(135deg,var(--accent),#ea580c);color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 30px rgba(249,115,22,.3)}
.btn-secondary{background:var(--surface2);border:1px solid var(--border);color:var(--text)}
.btn-secondary:hover{border-color:var(--text2)}
.btn-danger{background:var(--red-dim);color:var(--red);border:1px solid rgba(239,68,68,.3)}
.btn-danger:hover{background:rgba(239,68,68,.2)}
.btn-sm{padding:.35rem .8rem;font-size:.78rem;border-radius:8px}

/* Grid */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem}
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem}

/* Stat cards */
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:1.2rem 1.4rem;transition:all .3s}
.stat-card:hover{border-color:var(--border2);transform:translateY(-2px)}
.stat-card .label{font-size:.8rem;color:var(--text2);margin-bottom:.4rem;display:flex;align-items:center;gap:.4rem}
.stat-card .value{font-size:1.6rem;font-weight:800}

/* Tags */
.tag{display:inline-flex;align-items:center;gap:.3rem;padding:.2rem .6rem;border-radius:6px;font-size:.72rem;font-weight:600}
.tag-accent{background:var(--accent-dim);color:var(--accent)}
.tag-purple{background:var(--purple-dim);color:var(--purple)}
.tag-cyan{background:var(--cyan-dim);color:var(--cyan)}
.tag-green{background:var(--green-dim);color:var(--green)}
.tag-red{background:var(--red-dim);color:var(--red)}
.tag-yellow{background:var(--yellow-dim);color:var(--yellow)}

/* Table */
.table-container{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th{text-align:left;padding:.7rem 1rem;font-size:.73rem;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border)}
td{padding:.7rem 1rem;border-bottom:1px solid rgba(63,63,70,.4);font-size:.88rem}
tr:hover td{background:rgba(39,39,42,.3)}
tr{cursor:default}

/* Forms */
.form-group{margin-bottom:1.2rem}
.form-group label{display:block;font-size:.83rem;font-weight:600;margin-bottom:.4rem;color:var(--text2)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}

/* Code blocks */
.code-block{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.75rem 1rem;overflow-x:auto;font-family:'JetBrains Mono',monospace;font-size:.82rem;line-height:1.6;white-space:pre-wrap}
.inline-code{background:var(--surface2);padding:.1rem .35rem;border-radius:4px;font-size:.82rem;font-family:'JetBrains Mono',monospace}

/* Loading */
.loading{text-align:center;padding:4rem 2rem;color:var(--text2)}
.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 1rem}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* Empty state */
.empty-state{text-align:center;padding:3rem 2rem;color:var(--text2)}
.empty-state .icon{font-size:3rem;margin-bottom:1rem}
.empty-state h3{font-weight:700;color:var(--text);margin-bottom:.5rem}
.empty-state p{font-size:.9rem;max-width:440px;margin:0 auto .5rem}

/* Toast */
.toast-container{position:fixed;top:1.5rem;right:1.5rem;z-index:1000;display:flex;flex-direction:column;gap:.5rem}
.toast{padding:.7rem 1.2rem;border-radius:10px;background:var(--surface);border:1px solid var(--border);font-size:.85rem;font-weight:500;display:flex;align-items:center;gap:.5rem;animation:toastIn .3s ease-out;box-shadow:0 8px 30px rgba(0,0,0,.3)}
@keyframes toastIn{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
.toast.success{border-color:rgba(74,222,128,.3);color:var(--green)}
.toast.error{border-color:rgba(239,68,68,.3);color:var(--red)}

/* Submission content */
.submission-content{font-size:.9rem;line-height:1.8}
.submission-content h2{font-size:1.15rem;font-weight:700;margin:1rem 0 .5rem}
.submission-content h3{font-size:1rem;font-weight:700;margin:.75rem 0 .4rem}
.submission-content h4{font-size:.9rem;font-weight:700;margin:.5rem 0 .3rem}
.submission-content li{margin-left:1.5rem;margin-bottom:.3rem}
.submission-content strong{color:var(--text);font-weight:700}

/* Responsive */
/* ─── Tier Card Effects ─── */
/* Champion: animated gradient shift + neon glow */
@keyframes champion-shift {
  0%  { background-position: 0% 50% }
  50% { background-position: 100% 50% }
  100%{ background-position: 0% 50% }
}
@keyframes champion-glow {
  0%,100%{box-shadow:0 0 8px rgba(251,191,36,.2),inset 0 0 15px rgba(251,191,36,.05)}
  50%{box-shadow:0 0 16px rgba(251,191,36,.35),inset 0 0 20px rgba(251,191,36,.1)}
}
.tc-champion {
  background-image: linear-gradient(135deg,
    #0d0800, #2d1c00, #5c3a00,
    #8a5a00, #5c3a00, #2d1c00, #0d0800) !important;
  background-size: 400% 400% !important;
  background-position: 0% 50%;
  animation: champion-shift 4s ease-in-out infinite, champion-glow 3s ease-in-out infinite;
}

/* Diamond: animated gradient shift (no shimmer, no glow) */
@keyframes diamond-shift {
  0%  { background-position: 0% 50% }
  50% { background-position: 100% 50% }
  100%{ background-position: 0% 50% }
}
.tc-diamond {
  /* background-image 분리 → background-size/position 애니메이션 보장 */
  background-image: linear-gradient(135deg,
    #051820, #0a3550, #0f5878,
    #126690, #0a3550, #051820) !important;
  background-size: 400% 400% !important;
  background-position: 0% 50%;
  animation: diamond-shift 5s ease-in-out infinite;
}

/* Gold: warm amber gradient */
.tc-gold {
  background: linear-gradient(135deg,
    #180f00 0%, #3d2500 35%, #5a3800 55%,
    #3d2500 75%, #180f00 100%) !important;
}

/* Silver: cool steel-blue gradient */
.tc-silver {
  background: linear-gradient(135deg,
    #0a0d18 0%, #161d30 35%, #1e2840 55%,
    #161d30 75%, #0a0d18 100%) !important;
}

/* Bronze: warm copper gradient */
.tc-bronze {
  background: linear-gradient(135deg,
    #150800 0%, #3c1c06 35%, #522810 55%,
    #3c1c06 75%, #150800 100%) !important;
}

@media(max-width:900px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.open{display:block}
  .mobile-toggle{display:flex}
  .main-content{margin-left:0}
  .page-header{padding-left:3.5rem}
  .form-row{grid-template-columns:1fr}
  .sidebar-resize-handle{display:none}
}
@media(max-width:600px){
  .page-content{padding:1rem}
  .grid-4{grid-template-columns:1fr 1fr}
  .stat-card .value{font-size:1.3rem}
  .grid-2{grid-template-columns:1fr}
}