:root{
  --bg: #0b0f14;
  --surface: #0f131a;
  --card: #12151a;
  --muted: #8b90aa;
  --accent: #5a7cff;
  --accent-2: #3b5bdb;
  --glass: rgba(255,255,255,0.03);
  --radius: 12px;
  --soft-shadow: 0 14px 40px rgba(2,6,12,0.55);
}

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

html {
  font-size: clamp(14px, 1.2vw, 18px);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background: radial-gradient(circle at 10% 0%, #0e1220 0%, var(--bg) 55%);
  color: #e7e9ef;

  display: flex;
  flex-direction: column;
  align-items: center;

  padding: 0.75rem;
  gap: 0.5rem;
}


ul,
ol {
  list-style: none;

  width: min(95vw, 900px);
  flex: 1 1 auto;

  padding: 1rem; 
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent), var(--card);
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.03);

  display: flex;
  flex-direction: column;
  gap: 0.75rem;

  overflow-y: auto;
  box-shadow: var(--soft-shadow);
}


ul::-webkit-scrollbar,
ol::-webkit-scrollbar {
  width: 8px;
}

ul::-webkit-scrollbar-track,
ol::-webkit-scrollbar-track { background: transparent; }

ul::-webkit-scrollbar-thumb,
ol::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(139,144,170,0.18), rgba(139,144,170,0.12));
  border-radius: 6px;
  border: 2px solid transparent;
  background-clip: padding-box;
}


li {
  max-width: 75%;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  line-height: 1.45;

  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)), var(--surface);
  color: #e7e9ef;
  box-shadow: 0 6px 16px rgba(2,6,12,0.45);

  word-wrap: break-word;
  animation: fadeIn 0.15s ease-out;
  transition: transform .12s ease, box-shadow .12s ease;
}

li:hover{ transform: translateY(-2px); box-shadow: 0 12px 28px rgba(2,6,12,0.5); }

.message.me{
  /* messages by current user: left & highlighted */
  align-self: flex-start;
  background: linear-gradient(180deg, rgba(79,124,255,0.12), rgba(59,91,219,0.06));
  color: #ffffff;
  border-bottom-left-radius: 6px;
  border: 1px solid rgba(79,124,255,0.08);
  box-shadow: 0 10px 22px rgba(59,91,219,0.08);
}

.message.them{
  /* messages by others: right & neutral */
  align-self: flex-end;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)), var(--surface);
  border-bottom-right-radius: 6px;
}


.message-meta{ display:flex; align-items:center; gap:0.6rem; font-size:0.78rem; color: var(--muted); margin-top:0.35rem }
.message-meta .time{ opacity:0.9 }
.message-meta .sender{ font-weight:600; color: #dfe3f7 }
.avatar{ width:30px; height:30px; border-radius:50%; background:linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); display:inline-flex; align-items:center; justify-content:center; color:var(--muted); font-size:0.85rem }


form {
  width: min(95vw, 900px);

  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;

  padding: 0.75rem;
  background: linear-gradient(180deg, rgba(27,32,50,0.55), rgba(17,18,28,0.55));
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.03);
  backdrop-filter: blur(6px);

  flex: 0 0 auto;
}

/* compact single-button form */
.form-inline{
  display: inline-flex;
  width: auto;
  padding: 0; /* compact and transparent to avoid stretched background */
  border-radius: 10px;
  border: none;
  background: transparent;
}

.message-form{ display:flex; gap:0.5rem; align-items:center; width:100%; }
.message-form label{ color:var(--muted); font-size:0.9rem; margin-right:0.4rem }
.message-form input{ flex:1; min-width:0; padding:0.65rem 0.8rem; border-radius:8px; border:1px solid rgba(255,255,255,0.02); }
.message-form button{ min-width:110px; padding:0.6rem 0.95rem }

.sr-only{ position: absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0 }

form > button:only-child{ margin: 0 auto; }

/* default styling for simple forms (login/signup etc.) */
form:not(.message-form):not(.form-inline){
  width: min(95vw, 520px);
  margin: 0.6rem auto;
  padding: 0.85rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.01), transparent), var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.03);
  display: block;
}

form:not(.message-form):not(.form-inline) label{ display:block; margin-bottom:0.3rem; color:var(--muted); }
form:not(.message-form):not(.form-inline) input, form:not(.message-form):not(.form-inline) textarea{ display:block; width:100%; padding:0.6rem; margin-bottom:0.6rem; border-radius:8px; border:1px solid rgba(255,255,255,0.02); background: linear-gradient(180deg,#07090d,#0f1317); color:inherit; }



input,
textarea {
  flex: 1 1 auto;
  min-width: 0;

  background: linear-gradient(180deg, #0e1116, #101316);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.6);

  padding: 0.75rem 0.9rem;
  color: #e7e9ef;

  font-size: 1rem;
  line-height: 1.4;
  outline: none;
  transition: box-shadow 0.15s ease, transform 0.08s ease, border-color 0.12s;
}

input:focus,
textarea:focus {
  box-shadow: 0 10px 30px rgba(59,91,219,0.12);
  border-color: rgba(79,124,255,0.45);
  transform: translateY(-1px);
}

textarea {
  resize: none;
  min-height: 44px;
  max-height: 160px;
}

input::placeholder,
textarea::placeholder {
  color: rgba(255,255,255,0.9);
  opacity: 0.95;
}

.admintitle {
align-items: center;
}

button {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;

  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 10px;

  padding: 0.6rem 1rem;
  min-width: 110px;
  min-height: 44px;

  font-size: 1rem;
  color: white;

  cursor: pointer;
  transition: transform 0.12s cubic-bezier(.2,.9,.3,1), box-shadow 0.12s ease, filter 0.12s ease;
  box-shadow: 0 8px 20px rgba(59,91,219,0.18);
}

button:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(59,91,219,0.22);
}

button:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 6px 12px rgba(59,91,219,0.14);
}


@media (max-width: 600px) {
  html { font-size: 15px; }
  body { padding: 0.5rem; }
  ul { width: 100%; padding: 0.6rem; gap: 0.6rem; }
  li { max-width: 92%; padding: 0.6rem 0.75rem; }

  form { flex-direction: column; align-items: stretch; gap:0.6rem; }

  .message-form { flex-direction: column; align-items: stretch; }
  .message-form label { display:block; }
  input, textarea { width: 100%; }

  button { width: 100%; min-width: 0; min-height: 48px; border-radius: 10px; padding: 0.75rem; }
  .form-inline { width: auto; }
}


@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}