@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
:root {
  --bg: linear-gradient(135deg, #f5f7fa, #e4ebf5);
  --card: #ffffff;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text: #0f172a;
  --me-time: #dcdcdc;
  --border: rgba(0, 0, 0, 0.08);
}

.theme-dark {
  --bg: radial-gradient(circle at 20% 30%, #0f172a, #020617 90%);
  --card: rgba(20, 27, 45, 0.9);
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --text: #f1f5f9;
  --me-time: #dcdcdc;
  --border: rgba(255, 255, 255, 0.06);
}

/* Base styles */
* {
  box-sizing: border-box;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}

body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto;
  color: var(--text);
  background: var(--bg);
  background-attachment: fixed;
}

.container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
  background: var(--card);
}

.login-card,
.chat-card {
  width: 100%;
  /* max-width: ; */
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  max-height: 85vh;
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
}

.login-card {
  background: var(--card);
  border-radius: 18px;
  padding: 40px 50px;
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 400px;  /* limit width for balance */
  height: auto;
}

.login-card h1 {
  margin: 0 0 16px;
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
}

.login-card input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  margin-bottom: 14px;
  outline: none;
}

.login-card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.login-card button {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 500;
}

.login-card button:hover {
  background: var(--accent-hover);
}

.hint {
  font-size: 13px;
  color: var(--muted);
  margin-top: 12px;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.chat-header .left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-header #otherName {
  font-weight: 600;
  font-size: 16px;
  color: var(--text)
}

.dot {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 20px;
  font-size: 13px;
}

.dot.offline {
  background: rgba(120, 120, 120, 0.08);
  color: var(--muted);
}

.dot.online {
  background: rgba(34, 197, 94, 0.18);
  color: #22c55e;
}

.btn {
  background: transparent;
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
}

.btn:hover {
  background: rgba(100, 100, 255, 0.1);
  border-color: var(--accent);
}
.theme-btn svg{
  fill: var(--text);
}

.messages {
  height: 60vh !important;
  overflow: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: transparent;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}

.messages::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-thumb {
  background-color: var(--accent);
  border-radius: 4px;
}

.msg {
  max-width: 70%;
  padding: 12px 16px;
  border-radius: 14px;
  line-height: 1.4;
  word-wrap: break-word;
}

.msg.me {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
}

.msg.other {
  align-self: flex-start;
  background: rgba(241, 241, 241, 0.7);
  color: var(--text);
}

.theme-dark .msg.other {
  background: rgba(255, 255, 255, 0.08);
}

.msg .time {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 6px;
}
.msg.me .time{
  color: var(--me-time);
}

.chat-input {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
  align-items: flex-end;
  background: var(--card);
}

.chat-input textarea {
  flex: 1;
  min-height: 48px;
  max-height: 120px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  resize: none;
  background: transparent;
  font-family: "Poppins";
  color: var(--text);
}

.chat-input textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.chat-input button {
  padding: 10px 16px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 500;
  font-family: "Poppins";
}

.chat-input button:hover {
  background: var(--accent-hover);
}

.typing-indicator {
  padding: 8px 20px;
}

.dot-typing {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.dot-typing span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
  animation: blink 1s infinite;
}

.dot-typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.dot-typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes blink {
  0% {
    transform: translateY(0);
    opacity: 0.3;
  }
  50% {
    transform: translateY(-4px);
    opacity: 1;
  }
  100% {
    transform: translateY(0);
    opacity: 0.3;
  }
}

/* Responsive */
@media (max-width: 600px) {
  .messages {
    height: 58vh;
    padding: 12px;
  }

  .login-card {
    padding: 24px;
  }
}