* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system;
}

body {
  margin: 0;
  background: #0b141a;
}

/* LOGIN */
#login {
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg,#075e54,#0b141a);
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-box {
  background: white;
  padding: 28px;
  border-radius: 12px;
  width: 320px;
  text-align: center;
}

.login-box input {
  width: 100%;
  padding: 12px;
  margin-bottom: 12px;
}

.login-box button {
  width: 100%;
  padding: 12px;
  background: #075e54;
  color: white;
  border: none;
  cursor: pointer;
}

#loginError {
  color: red;
  font-size: 12px;
}

/* APP */
#app {
  display: flex;
  height: 100vh;
  max-width: 1200px;
  margin: auto;
  background: #efeae2;
}

.hidden {
  display: none;
}

/* SIDEBAR */
.sidebar {
  width: 30%;
  background: white;
  border-right: 1px solid #ddd;
}

.sidebar-header {
  padding: 16px;
  background: #075e54;
  color: white;
  font-weight: bold;
}

.chat-list {
  overflow-y: auto;
}

.chat-item {
  padding: 12px;
  border-bottom: 1px solid #eee;
  cursor: pointer;
}

.chat-item:hover {
  background: #f5f5f5;
}

/* CHAT */
.chat-area {
  width: 70%;
  display: flex;
  flex-direction: column;
}

.chat-header {
  background: #075e54;
  color: white;
  padding: 14px;
  display: flex;
  gap: 10px;
}

.messages {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
}

.msg {
  max-width: 70%;
  padding: 8px;
  margin-bottom: 10px;
  border-radius: 8px;
  font-size: 14px;
}

.incoming {
  background: white;
  align-self: flex-start;
}

.outgoing {
  background: #dcf8c6;
  align-self: flex-end;
}

.msg img,
.msg audio {
  max-width: 100%;
  border-radius: 6px;
}

/* INPUT */
.input-bar {
  display: flex;
  padding: 8px;
  background: #f0f0f0;
}

.input-bar input {
  flex: 1;
  padding: 10px;
  border-radius: 20px;
  border: none;
}

.input-bar button {
  margin-left: 6px;
  background: none;
  border: none;
  font-size: 18px;
}

.preview {
  padding: 6px;
  background: #fff3cd;
  font-size: 12px;
}