*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg-base:#0a0f1e;--bg-surface:#0f172a;--bg-card:#1e293b;
  --border:rgba(51,65,85,0.6);--accent:#3b82f6;--accent-glow:rgba(59,130,246,0.3);
  --text:#f1f5f9;--text-muted:#94a3b8;--green:#10b981;--amber:#f59e0b;--red:#ef4444;
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg-base);color:var(--text);min-height:100vh;overflow-x:hidden}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:var(--bg-surface)}
::-webkit-scrollbar-thumb{background:#334155;border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}

.glass-card{background:rgba(30,41,59,0.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);transition:border-color .2s,box-shadow .2s,transform .2s}
.glass-card:hover{border-color:rgba(59,130,246,0.35);box-shadow:0 0 24px rgba(59,130,246,0.07);transform:translateY(-1px)}

#sidebar{position:fixed;top:0;left:0;bottom:0;width:260px;z-index:40;background:linear-gradient(180deg,#0f172a 0%,#0a0f1e 100%);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:transform .3s ease}
#sidebar .logo-area{padding:22px 18px 18px;border-bottom:1px solid var(--border)}
#sidebar nav{flex:1;padding:14px 10px;overflow-y:auto}
#sidebar nav a{display:flex;align-items:center;gap:11px;padding:10px 13px;border-radius:10px;margin-bottom:3px;color:var(--text-muted);text-decoration:none;font-size:13.5px;font-weight:500;transition:all .2s ease;cursor:pointer;border-left:3px solid transparent}
#sidebar nav a:hover,#sidebar nav a.active{background:rgba(59,130,246,0.12);color:#fff;border-left-color:var(--accent)}
#sidebar nav a.active .nav-icon{background:rgba(59,130,246,0.25);color:var(--accent)}
.nav-icon{width:30px;height:30px;border-radius:7px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.05);font-size:12px;flex-shrink:0}

#main{margin-left:260px;min-height:100vh;background:var(--bg-base);background-image:radial-gradient(ellipse at 10% 10%,rgba(59,130,246,0.06) 0%,transparent 50%),radial-gradient(ellipse at 90% 90%,rgba(16,185,129,0.04) 0%,transparent 50%)}
.topbar{position:sticky;top:0;z-index:30;background:rgba(10,15,30,0.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:13px 26px;display:flex;align-items:center;justify-content:space-between}
.page-title{font-size:17px;font-weight:700;color:var(--text)}
.page-subtitle{font-size:11.5px;color:var(--text-muted);margin-top:1px}
.page-content{padding:26px;max-width:1400px}
.section-header{display:flex;align-items:center;gap:9px;background:rgba(30,58,138,0.15);border-left:3px solid var(--accent);padding:9px 14px;border-radius:0 8px 8px 0;margin-bottom:14px;font-weight:700;font-size:13.5px;color:var(--text)}

.btn-primary{background:linear-gradient(135deg,#1d4ed8,#2563eb);color:#fff;border:none;border-radius:10px;padding:10px 20px;font-weight:600;font-size:13.5px;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:7px;font-family:inherit}
.btn-primary:hover{background:linear-gradient(135deg,#1e40af,#1d4ed8);box-shadow:0 0 20px var(--accent-glow);transform:translateY(-1px)}
.btn-primary:disabled{opacity:0.5;cursor:not-allowed;transform:none}
.btn-secondary{background:rgba(30,41,59,0.8);color:var(--text-muted);border:1px solid var(--border);border-radius:10px;padding:10px 20px;font-weight:600;font-size:13.5px;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:7px;font-family:inherit}
.btn-secondary:hover{border-color:var(--accent);color:var(--text)}
.btn-danger{background:rgba(127,29,29,0.4);color:#fca5a5;border:1px solid rgba(239,68,68,0.3);border-radius:7px;padding:5px 12px;font-weight:600;font-size:11.5px;cursor:pointer;transition:all .2s;font-family:inherit}
.btn-danger:hover{background:rgba(185,28,28,0.5)}

.form-input,.form-select{background:rgba(15,23,42,0.8);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:10px 13px;font-size:13.5px;transition:border-color .2s;outline:none;width:100%;font-family:inherit}
.form-input:focus,.form-select:focus{border-color:var(--accent)}
.form-select option{background:#1e293b;color:#f1f5f9}
.form-label{font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:5px;display:block}

.drop-zone{border:2px dashed rgba(59,130,246,0.4);border-radius:16px;background:rgba(59,130,246,0.04);padding:44px 22px;text-align:center;cursor:pointer;transition:all .2s}
.drop-zone:hover,.drop-zone.dragging{border-color:var(--accent);background:rgba(59,130,246,0.08);box-shadow:0 0 30px var(--accent-glow)}

.badge-available{padding:2px 9px;border-radius:99px;font-size:10.5px;font-weight:700;background:rgba(5,46,22,.6);color:#4ade80;border:1px solid rgba(22,163,74,.4)}
.badge-busy{padding:2px 9px;border-radius:99px;font-size:10.5px;font-weight:700;background:rgba(69,10,10,.6);color:#f87171;border:1px solid rgba(220,38,38,.4)}
.badge-pending{padding:2px 9px;border-radius:99px;font-size:10.5px;font-weight:700;background:rgba(69,45,0,.6);color:#fbbf24;border:1px solid rgba(217,119,6,.4)}

#sidebarOverlay{position:fixed;inset:0;z-index:39;background:rgba(0,0,0,.5);backdrop-filter:blur(2px)}

@media(max-width:1024px){
  #sidebar{transform:translateX(-100%)}
  #sidebar.open{transform:translateX(0)}
  #main{margin-left:0}
  .topbar{padding:11px 15px}
  .page-content{padding:14px}
}
@keyframes spin{to{transform:rotate(360deg)}}