/* ============================================================
   CoChat — feuille de style partagée
   ============================================================ */

:root{
  --ink:#0E1419;
  --ink-soft:#141C23;
  --sidebar-border:rgba(237,241,243,0.08);

  --canvas:#F6F7F9;
  --canvas-border:#E7E9EC;
  --surface-white:#FFFFFF;

  --mint:#2FD897;
  --mint-deep:#1FAE7D;
  --mint-ink:#08221A;
  --periwinkle:#6C7BFF;

  --text-light:#EDF1F3;
  --muted-light:#8DA0AC;
  --text-dark:#1A222B;
  --muted-dark:#75828F;
  --danger:#E5484D;

  --avatar-a:linear-gradient(135deg,#6C7BFF,#3ED9A0);
  --avatar-b:linear-gradient(135deg,#FF9770,#FF6B9E);
  --avatar-c:linear-gradient(135deg,#3ED9A0,#1FAE7D);
  --avatar-d:linear-gradient(135deg,#6C7BFF,#8B6CFF);
  --avatar-e:linear-gradient(135deg,#FFC55C,#FF9770);
  --avatar-f:linear-gradient(135deg,#4FC3F7,#6C7BFF);
}

*{box-sizing:border-box;margin:0;padding:0;}
html{height:100%;}
body{
  height:100%;
  background:var(--ink);
  color:var(--text-light);
  font-family:'Manrope',Arial,sans-serif;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
button{font-family:inherit;}
input{font-family:inherit;}

/* ---------- Formulaires (connexion / inscription) ---------- */
.auth-page{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  background:
    radial-gradient(circle at 15% 15%, rgba(62,217,160,0.08), transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(108,123,255,0.08), transparent 45%),
    var(--ink);
}
.auth-card{
  width:100%;max-width:400px;
  background:var(--ink-soft);
  border:1px solid var(--sidebar-border);
  border-radius:18px;
  padding:38px 34px;
  box-shadow:0 30px 80px rgba(0,0,0,0.35);
}
.auth-brand{
  display:flex;align-items:center;gap:9px;
  font-family:'Space Grotesk',sans-serif;
  font-size:20px;font-weight:700;margin-bottom:26px;
}
.auth-brand .dot{
  width:9px;height:9px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 4px rgba(47,216,151,0.15);
}
.auth-card h1{
  font-family:'Space Grotesk',sans-serif;
  font-size:24px;font-weight:700;margin-bottom:6px;
}
.auth-card p.subtitle{color:var(--muted-light);font-size:14.5px;margin-bottom:26px;}

.field{margin-bottom:16px;}
.field label{
  display:block;font-size:13.5px;color:var(--muted-light);margin-bottom:6px;font-weight:500;
}
.field input{
  width:100%;padding:11px 13px;border-radius:9px;
  background:var(--ink);border:1px solid var(--sidebar-border);
  color:var(--text-light);font-size:15px;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field input:focus{outline:none;border-color:var(--mint);box-shadow:0 0 0 3px rgba(47,216,151,0.14);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:100%;padding:12px 20px;border-radius:10px;
  font-weight:600;font-size:15px;border:none;cursor:pointer;
  transition:transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary{
  background:var(--mint);color:var(--mint-ink);
  box-shadow:0 6px 20px rgba(47,216,151,0.25);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(47,216,151,0.35);}

.auth-footer{margin-top:22px;text-align:center;font-size:14px;color:var(--muted-light);}
.auth-footer a{color:var(--mint);font-weight:600;}

.alert{padding:11px 14px;border-radius:9px;font-size:14px;margin-bottom:18px;}
.alert-error{background:rgba(229,72,77,0.12);color:#FF9B9B;border:1px solid rgba(229,72,77,0.25);}
.alert-success{background:rgba(47,216,151,0.12);color:var(--mint);border:1px solid rgba(47,216,151,0.25);}

/* ============================================================
   Dashboard
   ============================================================ */
.app{
  display:grid;grid-template-columns:308px 1fr;
  height:100vh;overflow:hidden;
}

/* ---------- Sidebar ---------- */
.sidebar{
  background:var(--ink);
  border-right:1px solid var(--sidebar-border);
  display:flex;flex-direction:column;
  min-width:0;
}
.sidebar-top{
  padding:20px 20px 16px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:18px;
  display:flex;align-items:center;gap:8px;letter-spacing:-0.01em;
}
.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 4px rgba(47,216,151,0.15);}

.icon-btn{
  background:none;border:1px solid var(--sidebar-border);color:var(--muted-light);
  width:34px;height:34px;border-radius:9px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--mint);color:var(--mint);background:rgba(47,216,151,0.06);}

.search-box{
  margin:0 16px 14px;
  display:flex;align-items:center;gap:9px;
  padding:9px 12px;border-radius:10px;
  background:var(--ink-soft);border:1px solid var(--sidebar-border);
  color:var(--muted-light);
}
.search-box input{
  flex:1;background:none;border:none;color:var(--text-light);font-size:13.5px;
}
.search-box input:focus{outline:none;}
.search-box input::placeholder{color:var(--muted-light);}

.conv-list{overflow-y:auto;flex:1;padding:4px 10px;}
.conv-item{
  display:flex;gap:12px;align-items:center;padding:11px 10px;
  cursor:pointer;border-radius:12px;
  transition:background .15s ease;
}
.conv-item:hover{background:var(--ink-soft);}
.conv-item.active{background:var(--ink-soft);box-shadow:inset 0 0 0 1px var(--sidebar-border);}
.conv-item.hidden{display:none;}

.conv-avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:14.5px;color:#08221A;
  font-family:'Space Grotesk',sans-serif;
}
.conv-info{min-width:0;flex:1;}
.conv-info .top-row{display:flex;justify-content:space-between;align-items:baseline;gap:8px;}
.conv-info .name{font-size:14.5px;font-weight:600;color:var(--text-light);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.conv-info .time{font-size:11.5px;color:var(--muted-light);flex-shrink:0;}
.conv-info .preview{
  font-size:13px;color:var(--muted-light);margin-top:2px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.empty-state{padding:40px 20px;color:var(--muted-light);font-size:13.5px;text-align:center;line-height:1.6;}

.skeleton-list{padding:4px 10px;display:flex;flex-direction:column;gap:6px;}
.skeleton-item{
  height:60px;border-radius:12px;background:var(--ink-soft);
  animation:pulse 1.4s ease-in-out infinite;
}
.skeleton-item:nth-child(2){animation-delay:.15s;}
.skeleton-item:nth-child(3){animation-delay:.3s;}
@keyframes pulse{0%,100%{opacity:.5;}50%{opacity:1;}}

.sidebar-footer{
  display:flex;align-items:center;gap:11px;
  padding:14px 16px;border-top:1px solid var(--sidebar-border);
}
.me-info{flex:1;min-width:0;}
.me-name{font-size:14px;font-weight:600;color:var(--text-light);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.me-status{font-size:12px;color:var(--muted-light);display:flex;align-items:center;gap:6px;margin-top:1px;}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--mint);}

/* ---------- Chat panel ---------- */
.chat-panel{
  display:flex;flex-direction:column;height:100vh;
  background:var(--canvas);color:var(--text-dark);
  min-width:0;
}
.chat-head{
  padding:16px 28px;border-bottom:1px solid var(--canvas-border);
  display:flex;align-items:center;gap:13px;
  background:var(--surface-white);flex-shrink:0;
}
.chat-head .name{font-weight:700;font-size:15.5px;color:var(--text-dark);}
.chat-head .status{color:var(--muted-dark);font-size:12.5px;display:flex;align-items:center;gap:6px;}
.chat-head .status .status-dot{background:var(--mint);}

.messages{
  flex:1;overflow-y:auto;padding:26px 32px;
  display:flex;flex-direction:column;gap:3px;
}
.day-divider{
  align-self:center;
  font-size:12px;font-weight:600;color:var(--muted-dark);
  background:var(--canvas-border);
  padding:5px 14px;border-radius:20px;
  margin:18px 0 14px;
}
.day-divider:first-child{margin-top:0;}

.msg{
  max-width:56%;padding:9px 14px;border-radius:16px;font-size:14.5px;
  line-height:1.45;word-wrap:break-word;
  margin-top:12px;
}
.msg.stacked{margin-top:3px;}
.msg.in{
  align-self:flex-start;background:var(--surface-white);
  color:var(--text-dark);border:1px solid var(--canvas-border);
  border-bottom-left-radius:4px;
}
.msg.in.stacked{border-top-left-radius:16px;}
.msg.out{
  align-self:flex-end;background:var(--mint);
  color:var(--mint-ink);font-weight:500;border-bottom-right-radius:4px;
}
.msg.out.stacked{border-top-right-radius:16px;}
.msg .time{
  display:block;font-size:10.5px;opacity:.6;margin-top:3px;font-weight:500;
}

.composer{
  display:flex;gap:12px;align-items:center;
  padding:16px 28px;border-top:1px solid var(--canvas-border);
  background:var(--surface-white);flex-shrink:0;
}
.composer input{
  flex:1;padding:12px 16px;border-radius:24px;
  background:var(--canvas);border:1px solid var(--canvas-border);
  color:var(--text-dark);font-size:14.5px;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.composer input:focus{outline:none;border-color:var(--mint);box-shadow:0 0 0 3px rgba(47,216,151,0.14);}
.composer input::placeholder{color:var(--muted-dark);}
.composer button{
  width:42px;height:42px;border-radius:50%;border:none;background:var(--mint);
  color:var(--mint-ink);cursor:pointer;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  transition:transform .15s ease, background .2s ease;
}
.composer button:hover{transform:scale(1.05);background:var(--mint-deep);}
.composer button:disabled{opacity:.5;cursor:default;transform:none;}

.placeholder-panel{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--muted-dark);text-align:center;padding:24px;
}
.placeholder-icon{
  width:72px;height:72px;border-radius:50%;
  background:var(--surface-white);border:1px solid var(--canvas-border);
  display:flex;align-items:center;justify-content:center;
  color:var(--mint-deep);margin-bottom:18px;
}
.placeholder-title{font-family:'Space Grotesk',sans-serif;font-size:18px;font-weight:700;color:var(--text-dark);margin-bottom:6px;}
.placeholder-panel p{max-width:32ch;font-size:14px;}

/* ---------- Modal : nouvelle conversation ---------- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(8,13,17,0.55);
  display:none;align-items:center;justify-content:center;
  z-index:50;padding:20px;
}
.modal-overlay.open{display:flex;}
.modal{
  width:100%;max-width:380px;
  background:var(--ink-soft);border:1px solid var(--sidebar-border);
  border-radius:16px;padding:28px;
  box-shadow:0 30px 80px rgba(0,0,0,0.45);
}
.modal h2{font-family:'Space Grotesk',sans-serif;font-size:19px;font-weight:700;margin-bottom:8px;}
.modal-subtitle{color:var(--muted-light);font-size:13.5px;margin-bottom:18px;line-height:1.5;}
.modal input{
  width:100%;padding:11px 13px;border-radius:9px;
  background:var(--ink);border:1px solid var(--sidebar-border);
  color:var(--text-light);font-size:14.5px;
}
.modal input:focus{outline:none;border-color:var(--mint);}
.modal-error{
  color:#FF9B9B;font-size:13px;margin-top:10px;min-height:16px;
}
.modal-actions{display:flex;gap:10px;margin-top:18px;}
.modal-actions .btn-primary, .modal-actions .btn-secondary{
  flex:1;padding:11px 16px;border-radius:9px;font-weight:600;font-size:14px;
  border:none;cursor:pointer;transition:opacity .2s ease, background .2s ease;
}
.modal-actions .btn-primary{background:var(--mint);color:var(--mint-ink);}
.modal-actions .btn-primary:hover{background:var(--mint-deep);}
.modal-actions .btn-secondary{background:transparent;border:1px solid var(--sidebar-border);color:var(--text-light);}
.modal-actions .btn-secondary:hover{border-color:rgba(237,241,243,0.25);}

@media (max-width:760px){
  .app{grid-template-columns:1fr;}
  .sidebar{display:none;}
  .app.show-chat .sidebar{display:none;}
}