/* ======================================================
   RESET & VARIÁVEIS
====================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-app:      #0d0d0d;
  --bg-header:   #1a1a2e;
  --bg-chat:     #111118;
  --bg-sidebar:  #0f0f1a;
  --bg-input:    #1c1c2e;
  --bg-overlay:  rgba(0, 0, 0, 0.85);

  --border:      #2a2a4a;
  --border-glow: #4040aa;

  --text-main:   #c8c8e8;
  --text-dim:    #5a5a8a;
  --text-system: #888;

  --accent:      #5555ff;
  --accent-glow: #7777ff;
  --green:       #00cc66;
  --yellow:      #ffcc00;

  --font:        'Share Tech Mono', 'Courier New', monospace;
  --font-size:   14px;
  --radius:      4px;
}

body {
  background: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font);
  font-size: var(--font-size);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ======================================================
   TELA DE LOGIN (Overlay)
====================================================== */
#overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.login-box {
  background: #10101e;
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 40px rgba(80, 80, 255, 0.3), inset 0 0 20px rgba(0,0,0,0.5);
  padding: 40px 48px;
  width: 380px;
  border-radius: var(--radius);
}

.login-box h1 {
  font-size: 28px;
  letter-spacing: 4px;
  color: var(--accent-glow);
  text-shadow: 0 0 12px var(--accent);
  margin-bottom: 4px;
}

.login-box .subtitle {
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 2px;
  margin-bottom: 32px;
}

.login-box label {
  display: block;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.login-box input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-main);
  font-family: var(--font);
  font-size: 15px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  margin-bottom: 20px;
}

.login-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(80, 80, 255, 0.4);
}

.login-box button {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 13px;
  letter-spacing: 3px;
  padding: 12px;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}

.login-box button:hover {
  background: var(--accent-glow);
  box-shadow: 0 0 14px rgba(100, 100, 255, 0.6);
}

.login-erro {
  color: #ff6b6b;
  font-size: 12px;
  margin-top: 12px;
  min-height: 18px;
  letter-spacing: 1px;
}

/* ======================================================
   LAYOUT PRINCIPAL
====================================================== */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* --- Barra de título superior --- */
#header {
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

#header .titulo {
  font-size: 16px;
  letter-spacing: 3px;
  color: var(--accent-glow);
  text-shadow: 0 0 8px var(--accent);
}

#header .info-usuario {
  font-size: 12px;
  color: var(--text-dim);
}

#header .info-usuario span {
  color: var(--green);
}

/* --- Área central (chat + sidebar) --- */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* --- Janela de mensagens --- */
#chat-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
}

#canal-header {
  background: #13131f;
  border-bottom: 1px solid var(--border);
  padding: 7px 16px;
  font-size: 12px;
  color: var(--text-dim);
  flex-shrink: 0;
}

#canal-header span { color: var(--yellow); }

#mensagens {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  background: var(--bg-chat);
  scroll-behavior: smooth;
}

/* Scrollbar personalizada */
#mensagens::-webkit-scrollbar { width: 6px; }
#mensagens::-webkit-scrollbar-track { background: transparent; }
#mensagens::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* --- Linha de mensagem --- */
.msg-linha {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 3px 0;
  line-height: 1.5;
  border-bottom: 1px solid rgba(255,255,255,0.025);
}

.msg-hora {
  color: var(--text-dim);
  font-size: 11px;
  flex-shrink: 0;
  user-select: none;
}

.msg-nick {
  font-weight: bold;
  flex-shrink: 0;
  cursor: default;
}

.msg-nick::before { content: "<"; color: var(--text-dim); }
.msg-nick::after  { content: ">"; color: var(--text-dim); }

.msg-texto {
  color: var(--text-main);
  word-break: break-word;
}

/* Mensagem de sistema */
.msg-sistema {
  color: var(--text-dim);
  font-size: 12px;
  padding: 4px 0;
  letter-spacing: 1px;
}

.msg-sistema::before { content: "*** "; color: var(--yellow); }

/* --- Barra de envio --- */
#envio-area {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-input);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  align-items: center;
}

#meu-nick {
  color: var(--green);
  font-size: 13px;
  flex-shrink: 0;
  white-space: nowrap;
}

#input-msg {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font);
  font-size: var(--font-size);
  caret-color: var(--accent-glow);
}

#btn-enviar {
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font);
  font-size: 12px;
  letter-spacing: 2px;
  padding: 6px 16px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s;
}

#btn-enviar:hover { background: var(--accent-glow); }

/* --- Sidebar de usuários --- */
#sidebar {
  width: 180px;
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

#sidebar-header {
  background: #13131f;
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-dim);
  flex-shrink: 0;
}

#sidebar-header span { color: var(--yellow); }

#lista-usuarios {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 6px 0;
}

#lista-usuarios li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-size: 13px;
  transition: background 0.15s;
}

#lista-usuarios li:hover { background: rgba(255,255,255,0.04); }

/* Bolinha de status */
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  flex-shrink: 0;
}

/* ======================================================
   RESPONSIVO — telas pequenas
====================================================== */
@media (max-width: 600px) {
  #sidebar { display: none; }
  .login-box { padding: 28px 24px; width: 90vw; }
}