:root{

  --bg:white;
  --card:white;

  --border:rgba(255,255,255,.08);

  --text:#ffffff;
  --muted:#98a3bd;

  --accent:#ff7a3d;
  --accent2:#7b61ff;

  --green:#22c55e;

  --transition:.35s ease;
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{

  background:white;

  color:var(--text);

  font-family:'DM Sans',sans-serif;

  overflow-x:hidden;
}
/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-w);
  height: 100vh;
  background: linear-gradient(160deg, #141428 0%, #1c1c35 100%);
  display: flex;
  flex-direction: column;
  padding: 0;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1050;
  border-right: 1px solid rgba(255,255,255,0.05);
  transition: transform var(--transition);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.brand-icon {
  font-size: 24px;
  color: var(--accent);
}

.brand-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  letter-spacing: -0.5px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
}

.sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  color: #8a9bc0;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}

.sidebar-nav li a i {
  width: 18px;
  text-align: center;
  font-size: 15px;
}

.sidebar-nav li a:hover {
  background: rgba(255,255,255,0.07);
  color: #fff;
  transform: translateX(4px);
}

.sidebar-nav li a:active {
  transform: translateX(2px) scale(0.98);
}

.sidebar-nav li.active a {
  background: linear-gradient(90deg, rgba(235,104,53,0.2) 0%, rgba(235,104,53,0.05) 100%);
  color: var(--accent);
  border-left: 3px solid var(--accent);
}

.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  gap: 16px;
}

.sidebar-footer a {
  color: #6a7a94;
  font-size: 16px;
  transition: color var(--transition);
}

.sidebar-footer a:hover {
  color: var(--accent);
}

/* Sidebar backdrop (mobile) */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1040;
  backdrop-filter: blur(2px);
}

.sidebar-backdrop.visible {
  display: block;
}
/* NAVBAR */

.navbar{

  position:fixed;

  top:0;
  left:240px;
  right:0;

  height:82px;

  display:flex;
  align-items:center;
  justify-content:space-between;

  padding:0 30px;

  background:
    white;

  backdrop-filter:blur(18px);

  border-bottom:
    1px solid var(--border);

  z-index:999;
}

.search-bar{

  width:420px;

  display:flex;
  align-items:center;

  gap:12px;

  padding:14px 18px;

  border-radius:999px;

  background:
    white;

  border:
    1px solid var(--border);
}

.search-bar input{

  width:100%;

  border:none;
  outline:none;

  background:none;

  color:white;
}

.nav-actions{

  display:flex;
  gap:14px;
}

.outline-btn,
.primary-btn{

  border:none;

  padding:14px 20px;

  border-radius:18px;

  cursor:pointer;

  font-weight:700;
}

.outline-btn{

  background:
    rgba(255,255,255,.06);

  color:white;
}

.primary-btn{

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    );

  color:white;
}

/* MAIN */

.main-home{

  margin-left:240px;

  padding:120px 40px 60px;
}

/* HERO */

.hero-section{

  text-align:center;

  margin-bottom:70px;
}

.hero-badge{

  display:inline-flex;

  padding:12px 18px;

  border-radius:999px;

  background:white;

  border:
    1px solid var(--border);

  margin-bottom:24px;
}

.hero-section h1{

  font-size:
    clamp(58px,8vw,110px);

  line-height:1;

  margin-bottom:20px;

  font-family:'Syne',sans-serif;
}

.hero-section h1 span{

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    );

  -webkit-background-clip:text;

  -webkit-text-fill-color:transparent;
}

.hero-section p{

  color:#e0e6f7;

  max-width:760px;

  margin:auto;

  line-height:1.8;

  font-size:18px;
}

/* GRID */

.chat-grid{

  display:grid;

  grid-template-columns:
    repeat(auto-fit,minmax(320px,1fr));

  gap:28px;
}

.large-card{
  grid-column:span 2;
}

/* CARD */

.chat-card{

  background:
    linear-gradient(
      145deg,
      #12192b,
      #172038
    );

  border:
    1px solid var(--border);

  border-radius:32px;

  padding:30px;
}

.card-header{

  display:flex;
  justify-content:space-between;
  align-items:center;

  margin-bottom:28px;
}

.card-label{

  display:inline-block;

  padding:8px 14px;

  border-radius:999px;

  background:
    rgba(255,255,255,1);

  color:#f0f4ff;

  font-weight: 600;

  font-size:12px;

  margin-bottom:14px;
}

.card-header h2{

  font-size:34px;

  font-family:'Syne',sans-serif;

  color: #ffffff;
}

/* ONLINE */

.online-status{

  display:flex;
  align-items:center;

  gap:8px;

  color: #cfe3ff;    
  font-weight: 500;
}

.online-status span{

  width:10px;
  height:10px;

  border-radius:50%;

  background:var(--green);
}

/* CHAT WINDOW */

.chat-window{

  display:flex;
  flex-direction:column;

  gap:22px;

  margin-bottom:26px;
}

.message{

  display:flex;

  gap:14px;
}

.message img{

  width:50px;
  height:50px;

  border-radius:50%;
}

.sent{

  justify-content:flex-end;
}

.bubble{

  max-width:420px;

  padding:18px;

  border-radius:24px;

  background:
    rgba(255,255,255,.08);

  color: #f5f7fa;

  border:
    1px solid rgba(255,255,255,.15);
}

.sent .bubble{

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    );
}

.bubble strong{

  display:block;

  margin-bottom:10px;

  color: #ffffff;
  font-weight: 600;
}

.bubble p{

  line-height:1.7;

  margin-bottom:12px;

  color: #e6ebf5;
}

.bubble span{

  font-size:13px;

  color: #d0d6e2;
  opacity: 1;
}

/* INPUT */

.chat-input{

  display:flex;

  align-items:center;

  gap:14px;

  padding:16px;

  border-radius:24px;

  background:
    rgba(255,255,255,.04);
}

.chat-input input{

  flex:1;

  border:none;
  outline:none;

  background:none;

  color:white;

  font-size:15px;
}

.chat-input button{

  width:52px;
  height:52px;

  border:none;

  border-radius:16px;

  background:
    rgba(255,255,255,.08);

  color:white;

  cursor:pointer;
}

.send-btn{

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    ) !important;
}

/* CONTACTS */

.contacts-list{

  display:flex;
  flex-direction:column;

  gap:18px;
}

.contact-item{

  display:flex;
  align-items:center;

  gap:16px;

  padding:16px;

  border-radius:22px;

  background:
    rgba(255,255,255,.04);

  transition:var(--transition);

  cursor:pointer;
}

.contact-item:hover,
.active-contact{

  background:
    rgba(255,255,255,.08);
}

.contact-item img{

  width:56px;
  height:56px;

  border-radius:50%;
}

.contact-item span{

  color:var(--muted);

  font-size:14px;
}

/* AI BOX */

.ai-box{

  text-align:center;
}

.ai-avatar{

  width:100px;
  height:100px;

  border-radius:30px;

  margin:auto auto 22px;

  display:flex;
  align-items:center;
  justify-content:center;

  font-size:42px;

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    );
}

.ai-box h3{

  font-size:32px;

  margin-bottom:16px;

  font-family:'Syne',sans-serif;
}

.ai-box p{

  color:var(--muted);

  line-height:1.8;

  margin-bottom:28px;
}

.generate-btn{

  border:none;

  padding:16px 24px;

  border-radius:18px;

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent2)
    );

  color:white;

  font-weight:700;

  cursor:pointer;
}

/* CHANNELS */

.channel-list{

  display:flex;
  flex-direction:column;

  gap:14px;
}

.channel{

  padding:18px;

  border-radius:18px;

  background:
    rgba(255,255,255,.08);
  
  color: #f0f4ff;  
  font-weight: 500;

  transition:var(--transition);

  cursor:pointer;
}

.channel:hover,
.active-channel{

  background:
    linear-gradient(
      135deg,
      rgba(255,122,61,.25),
      rgba(123,97,255,.25)
    );
  color: #ffffff; 
}

/* RESPONSIVE */

@media(max-width:1100px){

  .large-card{
    grid-column:span 1;
  }

}

@media(max-width:900px){

  .sidebar{
    display:none;
  }

  .navbar,
  .main-home{

    margin-left:0;

    left:0;
  }

}

@media(max-width:768px){

  .navbar{

    flex-direction:column;

    height:auto;

    padding:18px;

    gap:16px;
  }

  .search-bar{
    width:100%;
  }

  .main-home{
    padding:160px 20px 40px;
  }

  .chat-grid{
    grid-template-columns:1fr;
  }

  .card-header{
    flex-direction:column;
    align-items:flex-start;
    gap:16px;
  }

}

/* ============================================================
   SCROLL TO TOP BUTTON
   ============================================================ */
#scrollTopBtn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 15px;
  cursor: pointer;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(235,104,53,0.35);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all var(--transition);
}

#scrollTopBtn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

#scrollTopBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(235,104,53,0.45);
}

.pinned-item {
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.06);
  color: #f0f4ff;       /* brighter text */
  font-weight: 500;
  line-height: 1.6;
}

.voice-message .bubble {
  background: rgba(255,255,255,.08);
  color: #f5f7fa;
  border: 1px solid rgba(255,255,255,.15);
}

.voice-message strong {
  color: #ffffff;
  font-weight: 600;
}

.voice-message p {
  color: #e6ebf5;
}

.voice-message span {
  color: #d0d6e2;
  opacity: 1;
}

.group-chat .bubble {
  background: rgba(255,255,255,.08);
  color: #f5f7fa;
}

.group-chat strong {
  color: #ffffff;
  font-weight: 600;
}

.group-chat p {
  color: #e6ebf5;
}

.group-chat span {
  color: #d0d6e2;
  opacity: 1;
}

.notification-box p {
  margin-bottom: 10px;
  color: #f0f4ff;       /* brighter text */
  font-weight: 500;
  line-height: 1.6;
}
/* ===== Additional Chat Components Styles ===== */
.thread-card { display:flex; flex-direction:column; gap:12px; }
.thread-parent .bubble { background: rgba(255,255,255,0.03); }
.thread-replies { margin-left: 12px; display:flex; flex-direction:column; gap:10px; }

.reactions-row { display:flex; gap:12px; align-items:flex-start; }
.reactions { margin-top:8px; color:var(--muted); font-size:14px; display:flex; gap:10px; align-items:center; }
.reactions .count { font-weight:700; margin-left:4px; color:#d6def7; }

.typing-indicator { display:flex; gap:6px; align-items:flex-end; }
.typing-indicator span { width:8px; height:8px; background:rgba(255,255,255,0.12); border-radius:50%; display:inline-block; animation:typing 1.2s infinite; }
.typing-indicator span:nth-child(2){ animation-delay:0.15s }
.typing-indicator span:nth-child(3){ animation-delay:0.3s }
@keyframes typing { 0%{ transform:translateY(0); opacity:0.3 } 50%{ transform:translateY(-8px); opacity:1 } 100%{ transform:translateY(0); opacity:0.3 } }

.message-options { position:relative; }
.msg-actions { margin-left:8px; color:var(--muted); cursor:pointer; padding:6px 10px; border-radius:8px; transition:background var(--transition); }
.msg-actions:hover { background:rgba(255,255,255,0.03); }

.file-preview { display:flex; gap:16px; align-items:center; background:rgba(255,255,255,0.02); padding:18px; border-radius:14px; }
.file-thumb { width:72px; height:72px; border-radius:10px; display:grid; place-items:center; font-size:28px; background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; }
.file-meta strong { display:block; margin-bottom:6px; color:#dfe9ff; }
.file-meta p { color:var(--muted); margin:0 0 8px; }
.file-actions { display:flex; gap:10px; }

/* Small responsive tweaks for new components */
@media(max-width:768px){
  .file-preview { flex-direction:column; align-items:flex-start; }
  .thread-replies { margin-left:0; }
}