*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px}
:root {
  --bg-dark: #050508;
  --surface: rgba(15, 23, 42, 0.65);
  --accent: #3b82f6;
  --accent-dim: rgba(59, 130, 246, 0.2);
  --accent-hover: #2563eb;
  --text-main: #f8fafc;
  --text-dim: rgba(248, 250, 252, 0.5);
}
body {
  font-family: 'Montserrat', sans-serif;
  background: var(--bg-dark);
  background-image:
    radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
[hidden]{display:none!important}

/* Beautiful Black/Blue Mesh Background */
.mesh-bg { display: none; }
#particles{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.6}

.view{position:relative;z-index:1;max-width:640px;margin:0 auto;padding:0 20px 80px;display:flex;flex-direction:column;gap:20px}
.mono{font-family:'JetBrains Mono',monospace}

/* Elegant Header */
.site-header{display:flex;align-items:center;justify-content:space-between;padding:40px 0 20px}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{font-size:1.8rem; color: var(--accent);}
.logo-text{
  font-size:1.8rem;
  font-weight:700;
  font-family: 'Playfair Display', serif;
  background: linear-gradient(130deg, #fff 20%, var(--accent) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing: 0.02em;
}

/* Glass card */
.glass-card {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--accent-dim);
  border-radius: 24px;
  padding: 32px;
  transition: border-color .4s ease;
  position: relative;
}
.glass-card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  box-shadow: 0 10px 50px rgba(59, 130, 246, 0.1);
  opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
}
.glass-card:hover::before {
  opacity: 1;
}
.glass-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
}

.card-label{font-size:.7rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--accent)}

/* File Chip */
.file-chip{display:flex;align-items:flex-start;gap:16px;padding:16px;border-radius:16px;transition:all 0.3s; background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.05); content-visibility: auto; contain-intrinsic-size: 150px;}
.file-chip:hover{transform:translateY(-2px); background: rgba(255,255,255,0.04); border-color: var(--accent-dim);}
.file-chip-info{flex:1;min-width:0}
.file-chip-name{font-weight:600;font-size:0.95rem;word-break: break-all;}
.file-chip-size{font-size:.75rem;color:var(--text-dim);margin-top:6px}

/* Progress */
.progress-track{width:100%;height:4px;background:rgba(255,255,255,.05);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;border-radius:999px;background:var(--accent);transition:width .15s ease;width:0%}

/* Inputs */
.glass-input{flex:1;padding:14px 18px;background:rgba(0,0,0,0.3);border:1px solid rgba(255,255,255,.1);border-radius:12px;color:#fff;font-family:'Montserrat',sans-serif;outline:none;transition:all .3s;}
.glass-input:focus{border-color:var(--accent); box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);}

/* Buttons */
.btn-primary{
  padding:14px 24px;border:none;border-radius:12px;cursor:pointer;
  background: var(--accent);color:#fff;font-family:'Montserrat',sans-serif;font-weight:600;
  font-size:.9rem;white-space:nowrap;display:inline-flex;align-items:center;gap:8px;
  transition:all .3s;text-decoration:none; box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover{background:var(--accent-hover); transform:translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);}
.btn-primary:active{transform:translateY(0);}
.btn-primary:disabled{background:rgba(255,255,255,0.1);color:var(--text-dim);transform:none;cursor:not-allowed; box-shadow:none;}

.btn-ghost-sm{font-size:.8rem;color:var(--text-dim);text-decoration:none;padding:8px 14px;border:1px solid rgba(255,255,255,.1);border-radius:10px;transition:all .3s;cursor:pointer;background:transparent; font-family: 'Montserrat', sans-serif;}
.btn-ghost-sm:hover{color:var(--accent);border-color:var(--accent-dim);background:rgba(59, 130, 246, 0.05);}

/* Code Entry */
.code-entry-row{display:flex;gap:12px;margin-top:16px}
.code-input-big{font-size:1.3rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;text-align:center}

#file-feed::-webkit-scrollbar { width: 6px; }
#file-feed::-webkit-scrollbar-track { background: transparent; }
#file-feed::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 999px; }
#file-feed::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

@media(max-width:500px){
  .view{padding:0 12px 60px;gap:16px}
  .glass-card{padding:24px;border-radius:20px}
  .code-entry-row{flex-direction:column}
  .btn-primary{width:100%;justify-content:center}
}

/* Room Grid Layout */
.room-layout {
  max-width: 1200px; width: 100%; height: 100vh; padding: 20px;
  display: grid; grid-template-columns: 280px 1fr; gap: 20px; align-items: start;
}
.sidebar-card {
  padding: 20px; display: flex; flex-direction: column; gap: 15px; 
  height: calc(100vh - 40px); overflow-y: auto;
}
.main-chat-area {
  display: flex; flex-direction: column; gap: 15px; height: calc(100vh - 40px);
}

@media(max-width:800px){
  .room-layout { grid-template-columns: 1fr; overflow-y: auto; height: auto; }
  .sidebar-card { height: 200px; }
  .main-chat-area { height: calc(100vh - 200px); }
}

/* ══ UI IMPROVEMENTS ══ */

/* 1. Cinematic Staggered Entrance */
@keyframes slideUpFade {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}
.animate-enter-1 { animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both; }
.animate-enter-2 { animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both; }
.animate-enter-3 { animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both; }

/* 2. Glassmorphism Toasts */
#toast-container {
  position: fixed; top: 20px; right: 20px; z-index: 9999;
  display: flex; flex-direction: column; gap: 10px; pointer-events: none;
}
.toast {
  background: rgba(15, 23, 42, 0.98);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; padding: 14px 20px;
  color: #fff; font-size: 0.9rem; font-weight: 500; font-family: 'Montserrat', sans-serif;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5); display: flex; align-items: center; gap: 10px;
  transform: translateX(120%); opacity: 0; transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.toast.show { transform: translateX(0); opacity: 1; }
.toast.error { border-color: rgba(239, 68, 68, 0.5); border-left: 4px solid #ef4444; }
.toast.success { border-color: rgba(16, 185, 129, 0.5); border-left: 4px solid #10b981; }
.toast.info { border-color: rgba(59, 130, 246, 0.5); border-left: 4px solid var(--accent); }

/* 3. Live Pulse Dot */
.status-pulse {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: #10b981; margin-right: 6px; box-shadow: 0 0 8px #10b981;
  animation: pulseAnim 2s infinite;
}
.status-pulse.connecting { background: #f59e0b; box-shadow: 0 0 8px #f59e0b; }
.status-pulse.offline { background: #ef4444; box-shadow: 0 0 8px #ef4444; animation: none; }
@keyframes pulseAnim {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* 4. Avatars */
.avatar {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700; color: #fff; text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.2);
}

/* 5. Magnetic Drop Zone */
.drag-active {
  box-shadow: inset 0 0 0 2px var(--accent), inset 0 0 40px rgba(59, 130, 246, 0.2) !important;
  background: rgba(59, 130, 246, 0.03) !important;
}

/* 6. Error Shake */
@keyframes shakeError {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); border-color: #ef4444; box-shadow: 0 0 10px rgba(239, 68, 68, 0.3); }
  40%, 80% { transform: translateX(5px); border-color: #ef4444; box-shadow: 0 0 10px rgba(239, 68, 68, 0.3); }
}
.error-shake { animation: shakeError 0.4s ease; border-color: #ef4444 !important; }

/* 7. Download Button States */
.btn-dl {
  transition: all 0.3s ease;
}
.btn-dl.downloading {
  background: rgba(59,130,246,0.15) !important;
  border: 1px solid rgba(59,130,246,0.4) !important;
  color: var(--accent) !important;
  cursor: default !important;
  box-shadow: none !important;
  transform: none !important;
}
.btn-dl.done {
  background: #10b981 !important;
  color: #fff !important;
  border-color: transparent !important;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.4) !important;
}

/* 8. Enhanced Progress Bar */
.progress-track {
  width: 100%; height: 6px; background: rgba(255,255,255,.06);
  border-radius: 999px; overflow: hidden; position: relative;
}
.progress-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, #3b82f6, #60a5fa);
  transition: width .2s ease;
  width: 0%;
  position: relative;
}
.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.35) 50%, transparent 100%);
  animation: shimmer 1.5s infinite linear;
  transform: translateX(-100%);
  width: 100%;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.progress-info {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 6px; font-size: 0.7rem; color: var(--text-dim);
}
.progress-pct { font-weight: 700; color: var(--accent); }
.progress-speed { color: #a855f7; }
.progress-eta { color: var(--text-dim); }