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

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #1e1e2e;
  color: #e0e0e0;
  height: 100vh;
  overflow: hidden;
}

.hidden { display: none !important; }

/* Экран входа */
.login-screen {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: #2a2a3d;
  padding: 40px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 320px;
  max-width: 90vw;
  text-align: center;
}
.login-box h1 { font-size: 28px; }
.login-box input, .login-box button {
  padding: 12px;
  border-radius: 8px;
  border: none;
  font-size: 16px;
}
.login-box input { background: #1e1e2e; color: #fff; outline: none; }
.login-box button { background: #5865f2; color: #fff; cursor: pointer; }
.login-box button:hover { background: #4752c4; }
.error { color: #ff6b6b; font-size: 14px; min-height: 18px; }

/* Основной экран */
.main-screen { display: flex; height: 100vh; }

.sidebar {
  width: 240px;
  background: #2a2a3d;
  padding: 16px;
  overflow-y: auto;
}
.sidebar h2 { font-size: 16px; margin-bottom: 12px; color: #9a9ab0; }
#user-list { list-style: none; }
#user-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  border-radius: 8px;
  margin-bottom: 4px;
  background: #33334a;
}
#user-list li.me { opacity: 0.6; }
#user-list .call-btn {
  background: #3ba55d;
  border: none;
  color: #fff;
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 14px;
}
#user-list .call-btn:hover { background: #2d8a4c; }

.volume-box {
  margin-top: 16px;
  padding: 10px;
  background: #33334a;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: #9a9ab0;
}
.volume-box input[type="range"] {
  width: 100%;
  accent-color: #5865f2;
  cursor: pointer;
}

.logout-btn {
  margin-top: 10px;
  width: 100%;
  padding: 8px;
  border: none;
  border-radius: 8px;
  background: #3a3a52;
  color: #9a9ab0;
  cursor: pointer;
  font-size: 13px;
}
.logout-btn:hover { background: #ed4245; color: #fff; }

.chat-area { flex: 1; display: flex; flex-direction: column; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.msg { max-width: 70%; padding: 8px 12px; border-radius: 10px; background: #33334a; }
.msg.own { align-self: flex-end; background: #5865f2; }
.msg .meta { font-size: 11px; color: #b0b0c8; margin-bottom: 3px; }
.msg.own .meta { color: #d5d5ff; }
.msg.system {
  align-self: center;
  background: none;
  color: #9a9ab0;
  font-size: 13px;
  font-style: italic;
}

.chat-form { display: flex; padding: 12px; gap: 8px; background: #2a2a3d; }
.chat-form input {
  flex: 1;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: #1e1e2e;
  color: #fff;
  font-size: 15px;
  outline: none;
}
.chat-form button {
  padding: 0 20px;
  border: none;
  border-radius: 8px;
  background: #5865f2;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
}

/* Панель активного звонка */
.call-panel {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #33334a;
  padding: 12px 20px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  z-index: 10;
}
.hangup {
  background: #ed4245;
  border: none;
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
}

/* Входящий звонок */
.incoming-call {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: #2a2a3d;
  padding: 20px 28px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
  animation: pulse 1.2s infinite;
  z-index: 20;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(88,101,242,0.6); }
  50% { box-shadow: 0 0 0 12px rgba(88,101,242,0); }
}
.accept, .reject {
  border: none;
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
}
.accept { background: #3ba55d; }
.reject { background: #ed4245; }

/* ---------- Мобильная вёрстка ---------- */
@media (max-width: 600px) {
  .main-screen { flex-direction: column; }

  .sidebar {
    width: 100%;
    padding: 8px 10px;
    flex-shrink: 0;
  }
  .sidebar h2 { display: none; }

  /* Пользователи — горизонтальная лента с прокруткой */
  #user-list {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  #user-list li {
    flex-shrink: 0;
    margin-bottom: 0;
    gap: 8px;
  }

  .volume-box {
    margin-top: 6px;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 6px 10px;
  }
  .volume-box label { white-space: nowrap; }

  .msg { max-width: 88%; }

  .call-panel {
    max-width: 94vw;
    padding: 10px 14px;
    gap: 10px;
    font-size: 14px;
  }

  .incoming-call {
    width: 92vw;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 16px;
    text-align: center;
  }
  .accept, .reject { flex: 1; min-width: 110px; }
}