@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --bg-0:#0A0E17;
  --bg-1:#0F1522;
  --bg-2:#161D2E;
  --bg-3:#1E2740;
  --line:rgba(255,255,255,0.07);
  --line-soft:rgba(255,255,255,0.04);
  --text-0:#F2F4F8;
  --text-1:#B7C0D1;
  --text-2:#6E7891;
  --accent:#5B7CFA;
  --accent-2:#8B6CFB;
  --accent-soft:rgba(91,124,250,0.15);
  --good:#2ECC9B;
  --warn:#F4A261;
  --danger:#FF6B6B;
  --radius:16px;
  --radius-sm:10px;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  background:radial-gradient(1200px 800px at 10% -10%, #131b30 0%, var(--bg-0) 55%), var(--bg-0);
  color:var(--text-0);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
button{font-family:inherit;}
::-webkit-scrollbar{width:8px; height:8px;}
::-webkit-scrollbar-thumb{background:var(--bg-3); border-radius:8px;}
::-webkit-scrollbar-track{background:transparent;}

/* ---------- Waveform signature (used on auth screens + loaders) ---------- */
.waveform{display:flex; align-items:flex-end; gap:4px; height:28px;}
.waveform span{
  width:4px; border-radius:3px;
  background:linear-gradient(180deg, var(--accent), var(--accent-2));
  animation:wave 1.1s ease-in-out infinite;
}
.waveform span:nth-child(1){height:40%; animation-delay:-1.0s;}
.waveform span:nth-child(2){height:100%; animation-delay:-0.8s;}
.waveform span:nth-child(3){height:60%; animation-delay:-0.6s;}
.waveform span:nth-child(4){height:85%; animation-delay:-0.4s;}
.waveform span:nth-child(5){height:50%; animation-delay:-0.2s;}
@keyframes wave{
  0%,100%{transform:scaleY(0.4);}
  50%{transform:scaleY(1);}
}

/* ---------- Auth screens ---------- */
.auth-wrap{
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  padding:24px;
}
.auth-card{
  width:100%; max-width:400px;
  background:linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border:1px solid var(--line);
  border-radius:20px;
  padding:36px 32px;
  backdrop-filter:blur(20px);
  box-shadow:0 30px 80px -30px rgba(0,0,0,0.6);
}
.auth-brand{display:flex; align-items:center; gap:12px; margin-bottom:28px;}
.auth-brand h1{font-family:var(--font-display); font-size:20px; margin:0; letter-spacing:-0.02em;}
.auth-brand small{display:block; color:var(--text-2); font-size:12px; margin-top:2px;}
.auth-card h2{font-family:var(--font-display); font-size:24px; margin:0 0 6px;}
.auth-card p.sub{color:var(--text-1); margin:0 0 24px; font-size:14px;}
.field{margin-bottom:16px;}
.field label{display:block; font-size:12px; color:var(--text-2); margin-bottom:6px; text-transform:uppercase; letter-spacing:0.06em;}
.field input{
  width:100%; padding:12px 14px; border-radius:var(--radius-sm);
  border:1px solid var(--line); background:var(--bg-2); color:var(--text-0);
  font-size:14px; outline:none; transition:border-color .15s;
}
.field input:focus{border-color:var(--accent);}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border:none; border-radius:var(--radius-sm); cursor:pointer;
  font-weight:600; font-size:14px; padding:12px 18px; transition:transform .1s, opacity .15s;
}
.btn:active{transform:scale(0.97);}
.btn-primary{background:linear-gradient(135deg, var(--accent), var(--accent-2)); color:#fff; width:100%;}
.btn-primary:hover{opacity:0.92;}
.btn-ghost{background:transparent; color:var(--text-1); border:1px solid var(--line);}
.btn-icon{background:var(--bg-3); color:var(--text-0); width:38px; height:38px; padding:0; border-radius:10px;}
.btn-danger{background:var(--danger); color:#fff;}
.error-msg{background:rgba(255,107,107,0.12); border:1px solid rgba(255,107,107,0.3); color:#ffb0b0; padding:10px 12px; border-radius:10px; font-size:13px; margin-bottom:16px;}
.auth-footer{margin-top:20px; text-align:center; font-size:13px; color:var(--text-2);}
.auth-footer a{color:var(--accent); font-weight:600; text-decoration:none;}

/* ---------- App shell ---------- */
.app-shell{display:grid; grid-template-columns:76px 300px 1fr; height:100vh; overflow:hidden;}
.mobile-menu-btn{display:none;}
.mobile-backdrop{display:none; position:fixed; inset:0; background:rgba(4,6,12,0.6); z-index:15;}

@media (max-width: 860px){
  .app-shell{grid-template-columns:64px 1fr;}
  .mobile-menu-btn{display:flex;}
  .app-shell .sidebar-list{position:fixed; left:64px; top:0; bottom:0; width:min(84vw, 320px); z-index:20;
    transform:translateX(-120%); transition:transform .2s; background:var(--bg-1);}
  .app-shell.list-open .sidebar-list{transform:translateX(0);}
  .app-shell.list-open .mobile-backdrop{display:block;}

  .app-shell .thread-panel{position:fixed; inset:0; width:100%; z-index:50;}

  .thread-header{padding:12px 14px;}
  .messages-scroll{padding:14px;}
  .composer{padding:10px 14px 16px;}
  .sidebar-head{padding:16px 14px 10px;}
  .meetings-view{padding:18px 16px;}

  .modal-overlay{padding:16px;}
}

.rail{
  background:var(--bg-1); border-right:1px solid var(--line);
  display:flex; flex-direction:column; align-items:center; padding:18px 0; gap:8px;
}
.rail-logo{margin-bottom:14px;}
.rail-btn{
  width:44px; height:44px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  color:var(--text-2); cursor:pointer; transition:all .15s; background:transparent; border:none;
}
.rail-btn:hover{background:var(--bg-3); color:var(--text-0);}
.rail-btn.active{background:var(--accent-soft); color:var(--accent);}
.rail-spacer{flex:1;}
.rail-avatar{
  width:40px; height:40px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:13px; color:#fff; cursor:pointer; position:relative;
}
.rail-avatar .dot{position:absolute; bottom:-2px; right:-2px; width:11px; height:11px; border-radius:50%;
  background:var(--good); border:2px solid var(--bg-1);}

.sidebar-list{background:var(--bg-1); border-right:1px solid var(--line); display:flex; flex-direction:column; min-width:0;}
.sidebar-head{padding:20px 18px 12px; display:flex; align-items:center; justify-content:space-between;}
.sidebar-head h2{font-family:var(--font-display); font-size:18px; margin:0;}
.search-box{margin:0 14px 10px; position:relative;}
.search-box input{
  width:100%; padding:9px 12px 9px 34px; border-radius:10px; border:1px solid var(--line);
  background:var(--bg-2); color:var(--text-0); font-size:13px; outline:none;
}
.search-box svg{position:absolute; left:11px; top:50%; transform:translateY(-50%); opacity:0.5;}
.list-scroll{flex:1; overflow-y:auto; padding:4px 8px 12px;}
.conv-item{
  display:flex; align-items:center; gap:10px; padding:9px 10px; border-radius:12px; cursor:pointer;
  transition:background .12s; margin-bottom:2px;
}
.conv-item:hover{background:var(--bg-2);}
.conv-item.active{background:var(--accent-soft);}
.avatar{width:38px; height:38px; min-width:38px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:13px; color:#fff; position:relative;}
.avatar.sm{width:28px; height:28px; min-width:28px; font-size:11px; border-radius:8px;}
.avatar .dot{position:absolute; bottom:-2px; right:-2px; width:10px; height:10px; border-radius:50%; border:2px solid var(--bg-1);}
.avatar .dot.on{background:var(--good);}
.avatar .dot.off{background:var(--text-2);}
.conv-meta{min-width:0; flex:1;}
.conv-meta .name{font-size:14px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
.conv-meta .preview{font-size:12.5px; color:var(--text-2); white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
.conv-hash{color:var(--text-2); margin-right:2px;}
.section-label{font-size:11px; text-transform:uppercase; letter-spacing:0.08em; color:var(--text-2); padding:14px 12px 6px; display:flex; justify-content:space-between; align-items:center;}
.section-label .add-btn{cursor:pointer; color:var(--text-2); background:none; border:none; font-size:15px;}
.section-label .add-btn:hover{color:var(--accent);}

/* ---------- Main pane ---------- */
.main-pane{display:flex; flex-direction:column; min-width:0; background:var(--bg-0);}
.empty-state{flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px; color:var(--text-2);}
.empty-state h3{font-family:var(--font-display); color:var(--text-1); margin:0;}

.thread-header{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 22px; border-bottom:1px solid var(--line); background:var(--bg-0);
}
.thread-title{display:flex; align-items:center; gap:10px; min-width:0;}
.thread-title h3{margin:0; font-family:var(--font-display); font-size:16px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.thread-title .sub{font-size:12px; color:var(--text-2);}
.header-actions{display:flex; gap:8px; flex-shrink:0;}

.messages-scroll{flex:1; overflow-y:auto; padding:18px 22px; display:flex; flex-direction:column; gap:2px;}
.msg-row{display:flex; gap:12px; padding:6px 8px; border-radius:12px; position:relative;}
.msg-row:hover{background:var(--bg-1);}
.msg-row:hover .msg-actions{opacity:1;}
.msg-body{min-width:0; flex:1;}
.msg-head{display:flex; align-items:baseline; gap:8px;}
.msg-head .who{font-weight:700; font-size:14px;}
.msg-head .time{font-size:11px; color:var(--text-2); font-family:var(--font-mono);}
.msg-text{font-size:14.5px; line-height:1.5; color:var(--text-0); white-space:pre-wrap; word-break:break-word;}
.msg-actions{position:absolute; top:-14px; right:10px; display:flex; gap:4px; opacity:0; transition:opacity .12s; z-index:5;
  background:var(--bg-2); border:1px solid var(--line); border-radius:10px; padding:3px;}
.msg-actions button{background:none; border:none; color:var(--text-2); cursor:pointer; padding:5px 7px; border-radius:7px; font-size:12px;}
.msg-actions button:hover{background:var(--bg-3); color:var(--text-0);}
.thread-reply-pill{margin-top:6px; display:inline-flex; align-items:center; gap:6px; background:var(--bg-2);
  border:1px solid var(--line); padding:4px 10px; border-radius:20px; font-size:12px; color:var(--accent); cursor:pointer;}

.deleted-text{font-style:italic; color:var(--text-2); font-size:14px;}
.edit-wrap{margin:2px 0;}
.edit-textarea{
  width:100%; min-height:56px; background:var(--bg-2); border:1px solid var(--accent);
  border-radius:10px; color:var(--text-0); font-family:inherit; font-size:14.5px;
  padding:8px 10px; resize:vertical; outline:none;
}
.edit-actions{display:flex; justify-content:flex-end; gap:8px; margin-top:6px;}

.attachment-card{margin-top:6px; display:inline-flex; align-items:center; gap:10px; background:var(--bg-2);
  border:1px solid var(--line); padding:10px 14px; border-radius:12px; max-width:320px;}
.attachment-card .icon{width:34px; height:34px; border-radius:9px; background:var(--accent-soft); color:var(--accent);
  display:flex; align-items:center; justify-content:center;}
.attachment-card .info .fname{font-size:13px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:200px;}
.attachment-card .info .flabel{font-size:11px; color:var(--text-2);}
audio, video.msg-media{margin-top:6px; border-radius:12px; max-width:320px; background:var(--bg-2);}
video.msg-media{max-width:280px;}

.composer{padding:14px 22px 20px; border-top:1px solid var(--line);}
.composer-box{display:flex; align-items:flex-end; gap:8px; background:var(--bg-2); border:1px solid var(--line);
  border-radius:16px; padding:8px 8px 8px 14px;}
.composer-box textarea{
  flex:1; resize:none; background:transparent; border:none; outline:none; color:var(--text-0);
  font-family:inherit; font-size:14px; max-height:140px; padding:6px 0;
}
.composer-icon-btn{width:36px; height:36px; border-radius:10px; border:none; background:transparent; color:var(--text-2);
  display:flex; align-items:center; justify-content:center; cursor:pointer; transition:all .12s;}
.composer-icon-btn:hover{background:var(--bg-3); color:var(--text-0);}
.composer-icon-btn.recording{color:var(--danger); background:rgba(255,107,107,0.12);}
.composer-send{width:38px; height:38px; border-radius:11px; background:linear-gradient(135deg, var(--accent), var(--accent-2));
  border:none; color:#fff; display:flex; align-items:center; justify-content:center; cursor:pointer;}
.typing-indicator{font-size:12px; color:var(--text-2); padding:0 22px 6px; height:16px;}

/* ---------- Thread panel ---------- */
.thread-panel{width:340px; border-left:1px solid var(--line); background:var(--bg-1); display:flex; flex-direction:column;}
.thread-panel .thread-header{background:var(--bg-1);}

/* ---------- Header dropdown menu ---------- */
.dropdown-menu{
  position:absolute; top:44px; right:0; background:var(--bg-2); border:1px solid var(--line);
  border-radius:12px; padding:6px; min-width:170px; z-index:50; box-shadow:0 20px 50px -15px rgba(0,0,0,0.6);
  display:flex; flex-direction:column; gap:2px;
}
.dropdown-menu button{
  background:none; border:none; color:var(--text-0); text-align:left; padding:9px 10px; border-radius:8px;
  cursor:pointer; font-size:13.5px; font-family:inherit;
}
.dropdown-menu button:hover{background:var(--bg-3);}
.dropdown-menu button.danger{color:var(--danger);}
.dropdown-menu button.danger:hover{background:rgba(255,107,107,0.12);}

.color-swatch{
  width:30px; height:30px; border-radius:9px; cursor:pointer; border:2px solid transparent; transition:transform .1s;
}
.color-swatch:hover{transform:scale(1.08);}
.color-swatch.selected{border-color:#fff;}

/* ---------- Modals ---------- */
.modal-overlay{position:fixed; inset:0; background:rgba(6,8,14,0.7); backdrop-filter:blur(4px);
  display:flex; align-items:center; justify-content:center; z-index:100;}
.modal-card{width:100%; max-width:420px; background:var(--bg-1); border:1px solid var(--line); border-radius:18px;
  padding:26px; box-shadow:0 40px 100px -30px rgba(0,0,0,0.7);}
.modal-card h3{font-family:var(--font-display); margin:0 0 4px;}
.modal-card p.sub{color:var(--text-2); font-size:13px; margin:0 0 18px;}
.modal-actions{display:flex; gap:10px; margin-top:18px;}
.checkbox-row{display:flex; align-items:center; gap:8px; margin:8px 0 16px; font-size:13px; color:var(--text-1);}
.user-pick-list{max-height:180px; overflow-y:auto; display:flex; flex-direction:column; gap:4px; margin-bottom:6px;}
.user-pick-item{display:flex; align-items:center; gap:10px; padding:7px 8px; border-radius:10px; cursor:pointer;}
.user-pick-item:hover{background:var(--bg-2);}
.user-pick-item input{margin-left:auto;}

/* ---------- Call overlay ---------- */
.call-overlay{position:fixed; inset:0; background:linear-gradient(180deg, #060810, #0c1120); z-index:200;
  display:flex; flex-direction:column;}
.call-videos{flex:1; display:grid; gap:10px; padding:20px; grid-template-columns:repeat(auto-fit, minmax(260px, 1fr)); align-content:start;}
.call-tile{position:relative; background:var(--bg-2); border-radius:16px; overflow:hidden; aspect-ratio:16/10; border:1px solid var(--line);}
.call-tile video{width:100%; height:100%; object-fit:cover; background:#000;}
.call-tile .tag{position:absolute; bottom:8px; left:10px; font-size:12px; background:rgba(0,0,0,0.5); padding:4px 10px; border-radius:20px;}
.call-controls{display:flex; align-items:center; justify-content:center; gap:14px; padding:20px;}
.call-btn{width:52px; height:52px; border-radius:50%; border:none; display:flex; align-items:center; justify-content:center;
  background:var(--bg-3); color:var(--text-0); cursor:pointer; font-size:18px; transition:transform .1s;}
.call-btn:active{transform:scale(0.94);}
.call-btn.off{background:rgba(255,107,107,0.18); color:var(--danger);}
.call-btn.end{background:var(--danger); color:#fff;}
.call-topbar{display:flex; align-items:center; justify-content:space-between; padding:16px 22px; color:var(--text-1); font-size:13px;}

.incoming-call-toast{position:fixed; top:20px; right:20px; z-index:300; background:var(--bg-1); border:1px solid var(--line);
  border-radius:16px; padding:16px 18px; display:flex; align-items:center; gap:14px; box-shadow:0 20px 60px -20px rgba(0,0,0,0.7);}
.incoming-call-toast .actions{display:flex; gap:8px;}

/* ---------- Meetings ---------- */
.meetings-view{flex:1; overflow-y:auto; padding:24px 30px;}
.meetings-view h2{font-family:var(--font-display); margin:0 0 4px;}
.meetings-view p.sub{color:var(--text-2); margin:0 0 22px;}
.meeting-card{display:flex; align-items:center; gap:16px; background:var(--bg-1); border:1px solid var(--line);
  border-radius:14px; padding:16px 18px; margin-bottom:10px;}
.meeting-date-badge{display:flex; flex-direction:column; align-items:center; justify-content:center; width:56px; height:56px;
  background:var(--accent-soft); color:var(--accent); border-radius:12px; font-family:var(--font-mono);}
.meeting-date-badge .d{font-size:18px; font-weight:700; line-height:1;}
.meeting-date-badge .m{font-size:10px; text-transform:uppercase;}
.meeting-info{flex:1; min-width:0;}
.meeting-info .t{font-weight:700; font-size:14.5px;}
.meeting-info .m{font-size:12.5px; color:var(--text-2); margin-top:2px;}
.avatar-stack{display:flex;}
.avatar-stack .avatar{margin-left:-8px; border:2px solid var(--bg-1);}

.toast{position:fixed; bottom:20px; left:50%; transform:translateX(-50%); background:var(--bg-2); border:1px solid var(--line);
  padding:10px 18px; border-radius:12px; font-size:13px; z-index:400; box-shadow:0 10px 40px -10px rgba(0,0,0,0.6);}