/* ==========================================================================
   MATRIX PRIVATE CHAT - DESIGN SYSTEM & THEME
   Estética: Cyberpunk / Terminal Matrix minimalista, elegante y funcional
   ========================================================================== */

:root {
  --bg-core: #030805;
  --bg-surface: #07130c;
  --bg-surface-elevated: #0d2116;
  --bg-input: #040d07;

  --matrix-green-primary: #00ff66;
  --matrix-green-bright: #33ff85;
  --matrix-green-dim: #00a843;
  --matrix-green-glow: rgba(0, 255, 102, 0.35);
  --matrix-green-glow-strong: rgba(0, 255, 102, 0.6);
  --matrix-border: rgba(0, 255, 102, 0.25);
  --matrix-border-hover: rgba(0, 255, 102, 0.55);

  --text-primary: #a8fbc8;
  --text-secondary: #5a9e75;
  --text-dim: #325841;
  --text-bright: #ffffff;

  --alert-red: #ff3344;
  --alert-red-bg: rgba(255, 51, 68, 0.12);
  --alert-yellow: #ffcc00;

  --font-mono: 'Fira Code', 'Cascadia Code', 'Courier New', monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset básico */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-core);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* Efecto sutil de fondo Matrix */
.matrix-grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, rgba(0, 255, 102, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 255, 102, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 0;
}

/* Contenedor Principal */
.app-container {
  position: relative;
  width: 100%;
  height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  z-index: 1;
}

/* Manejo de vistas SPA */
.view-panel {
  display: none;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

.view-panel.active {
  display: flex;
  animation: panelFadeIn 0.3s ease-out forwards;
}

@keyframes panelFadeIn {
  from {
    opacity: 0;
    transform: scale(0.99);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==========================================================================
   ESTRUCTURA DE TARJETAS TIPO TERMINAL
   ========================================================================== */
.terminal-card {
  background: var(--bg-surface);
  border: 1px solid var(--matrix-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7), 0 0 24px rgba(0, 255, 102, 0.06);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.card-header {
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid var(--matrix-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.red { background: #ff4757; }
.dot.yellow { background: #ffa502; }
.dot.green { background: var(--matrix-green-primary); box-shadow: 0 0 6px var(--matrix-green-glow); }

.pulse-dot {
  animation: pulseGlow 1.8s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 8px var(--matrix-green-glow);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.92);
    box-shadow: 0 0 2px var(--matrix-green-glow);
  }
}

.terminal-caption {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

/* ==========================================================================
   PANTALLA DE LOGIN
   ========================================================================== */
.login-card {
  width: 100%;
  max-width: 440px;
}

.card-body {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.brand-block {
  text-align: center;
  margin-bottom: 4px;
}

.matrix-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--matrix-green-primary);
  text-shadow: 0 0 10px var(--matrix-green-glow-strong);
  letter-spacing: 2px;
}

.matrix-subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 2px;
  margin-top: 4px;
}

/* Alertas */
.terminal-alert {
  background: var(--alert-red-bg);
  border: 1px solid var(--alert-red);
  color: #ff99a4;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: shake 0.3s ease;
}

.terminal-alert.hidden {
  display: none !important;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.alert-icon {
  color: var(--alert-red);
  font-weight: bold;
}

/* Formulario */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.form-group label {
  font-size: 12px;
  color: var(--matrix-green-primary);
  letter-spacing: 1px;
  font-weight: 600;
}

.input-wrapper input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--matrix-border);
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition);
}

.input-wrapper input:focus {
  border-color: var(--matrix-green-primary);
  box-shadow: 0 0 10px var(--matrix-green-glow);
  background: #06170d;
}

.input-wrapper input::placeholder {
  color: var(--text-dim);
}

/* Botones */
.matrix-btn {
  background: transparent;
  border: 1px solid var(--matrix-green-primary);
  color: var(--matrix-green-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 1.5px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.matrix-btn:hover {
  background: var(--matrix-green-primary);
  color: var(--bg-core);
  box-shadow: 0 0 16px var(--matrix-green-glow-strong);
}

.matrix-btn:active {
  transform: scale(0.98);
}

.primary-btn {
  width: 100%;
  margin-top: 6px;
}

/* Accesos directos de prueba */
.test-shortcuts {
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--matrix-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.shortcuts-label {
  font-size: 11px;
  color: var(--text-secondary);
}

.shortcuts-group {
  display: flex;
  gap: 10px;
}

.btn-chip {
  flex: 1;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--matrix-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.btn-chip:hover {
  border-color: var(--matrix-green-primary);
  color: var(--matrix-green-primary);
  background: #0c2b18;
}

.card-footer {
  background: rgba(0, 0, 0, 0.4);
  border-top: 1px solid var(--matrix-border);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
}

/* ==========================================================================
   PANTALLA DE CHAT PRINCIPAL
   ========================================================================== */
.chat-card {
  width: 100%;
  max-width: 960px;
  height: 92vh;
}

/* Header del Chat */
.chat-header {
  background: rgba(0, 0, 0, 0.55);
  border-bottom: 1px solid var(--matrix-border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--matrix-green-primary);
  text-shadow: 0 0 8px var(--matrix-green-glow);
  letter-spacing: 1px;
}

.badge-tag {
  font-size: 9px;
  padding: 2px 6px;
  border: 1px solid var(--matrix-border);
  border-radius: 2px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.header-center {
  display: flex;
  align-items: center;
}

.user-badge {
  font-size: 12px;
  background: var(--bg-surface-elevated);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 255, 102, 0.15);
}

.meta-label {
  color: var(--text-secondary);
  margin-right: 4px;
}

.highlight-user {
  color: var(--matrix-green-bright);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Estado de conexión (ONLINE / OFFLINE) */
.peer-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
}

.peer-status.online {
  color: var(--matrix-green-primary);
  border-color: rgba(0, 255, 102, 0.3);
  background: rgba(0, 255, 102, 0.08);
}

.peer-status.online .status-indicator {
  color: var(--matrix-green-primary);
  text-shadow: 0 0 8px var(--matrix-green-glow-strong);
  animation: pulseGlow 1.8s infinite ease-in-out;
}

.peer-status.offline {
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.peer-status.offline .status-indicator {
  color: var(--text-dim);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 51, 68, 0.4);
  color: #ff8591;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.btn-ghost:hover {
  background: rgba(255, 51, 68, 0.15);
  border-color: var(--alert-red);
  color: #ffa8b0;
}

/* ==========================================================================
   LISTA DE MENSAJES
   ========================================================================== */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

/* Barra de desplazamiento estilo Matrix */
.messages-container::-webkit-scrollbar {
  width: 6px;
}

.messages-container::-webkit-scrollbar-track {
  background: var(--bg-surface);
}

.messages-container::-webkit-scrollbar-thumb {
  background: var(--matrix-border);
  border-radius: 3px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
  background: var(--matrix-green-dim);
}

.system-intro-message {
  align-self: center;
  background: rgba(0, 255, 102, 0.05);
  border: 1px dashed var(--matrix-border);
  color: var(--text-secondary);
  font-size: 11px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  text-align: center;
}

.sys-tag {
  color: var(--matrix-green-primary);
  font-weight: 600;
}

/* Filas de Mensajes */
.message-row {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: messageSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transition: opacity 0.5s ease, filter 0.5s ease;
}

/* Mensaje anterior: sutilmente más tenue como degradación de señal Matrix */
.message-row.fading-older {
  opacity: 0.65;
  filter: brightness(0.85);
}

.message-row.fading-older .message-bubble {
  border-style: dashed;
}

/* Mensaje en disolución y eliminación estilo Matrix */
.message-row.matrix-dissolving {
  pointer-events: none;
  animation: matrixDissolve 1.1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards !important;
}

@keyframes matrixDissolve {
  0% {
    opacity: 0.7;
    filter: blur(0px) drop-shadow(0 0 4px var(--matrix-green-primary));
    transform: translateY(0) scale(1);
  }
  25% {
    opacity: 1;
    color: var(--matrix-green-bright);
    filter: blur(0.5px) drop-shadow(0 0 12px var(--matrix-green-primary));
    transform: translateY(-2px) scale(1.01);
    letter-spacing: 1px;
  }
  50% {
    opacity: 0.45;
    filter: blur(1.5px) drop-shadow(0 0 6px var(--matrix-green-dim));
    transform: translateY(-6px) scale(0.97);
    letter-spacing: 1.5px;
  }
  75% {
    opacity: 0.18;
    filter: blur(3px);
    transform: translateY(-10px) scale(0.93);
  }
  100% {
    opacity: 0;
    filter: blur(5px);
    transform: translateY(-16px) scale(0.88);
    max-height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
  }
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mensajes Propios (Derecha) */
.message-row.own-message {
  align-self: flex-end;
  align-items: flex-end;
}

.message-row.own-message .message-bubble {
  background: #092113;
  border: 1px solid var(--matrix-green-dim);
  border-radius: 8px 8px 1px 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.message-row.own-message .message-header {
  display: none; /* No repetimos nuestro propio nombre para máxima limpieza */
}

.message-row.own-message .message-footer {
  justify-content: flex-end;
}

/* Mensajes del Compañero (Izquierda) */
.message-row.peer-message {
  align-self: flex-start;
  align-items: flex-start;
}

.message-row.peer-message .message-bubble {
  background: #08160e;
  border: 1px solid rgba(0, 255, 102, 0.18);
  border-radius: 8px 8px 8px 1px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Contenido del Mensaje */
.message-bubble {
  padding: 10px 14px;
  word-break: break-word;
  white-space: pre-wrap;
  color: var(--text-bright);
  font-size: 13.5px;
  line-height: 1.45;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.user-avatar-initial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #0f351e;
  border: 1px solid var(--matrix-green-primary);
  color: var(--matrix-green-bright);
  font-size: 10px;
  font-weight: 700;
}

.sender-name {
  font-size: 11px;
  color: var(--matrix-green-bright);
  font-weight: 600;
}

.message-footer {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

.message-time {
  font-size: 10px;
  color: var(--text-dim);
}

/* ==========================================================================
   INDICADOR DE ESCRITURA
   ========================================================================== */
.typing-bar {
  padding: 6px 20px;
  font-size: 11px;
  color: var(--matrix-green-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 255, 102, 0.03);
  border-top: 1px solid rgba(0, 255, 102, 0.08);
}

.typing-bar.hidden {
  display: none !important;
}

.typing-cursor {
  animation: blink 0.9s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ==========================================================================
   BARRA DE ENTRADA DE MENSAJE
   ========================================================================== */
.chat-input-bar {
  background: rgba(0, 0, 0, 0.6);
  border-top: 1px solid var(--matrix-border);
  padding: 12px 18px;
}

.input-form {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-input);
  border: 1px solid var(--matrix-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  transition: var(--transition);
}

.input-form:focus-within {
  border-color: var(--matrix-green-primary);
  box-shadow: 0 0 12px var(--matrix-green-glow);
}

.terminal-prompt-symbol {
  color: var(--matrix-green-primary);
  font-weight: bold;
  font-size: 16px;
  padding-left: 4px;
}

textarea#message-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 13.5px;
  padding: 6px 4px;
  outline: none;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
}

textarea#message-input::placeholder {
  color: var(--text-dim);
}

.send-btn {
  padding: 8px 16px;
  font-size: 12px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MÓVIL Y PANTALLAS PEQUEÑAS)
   ========================================================================== */
@media (max-width: 680px) {
  .app-container {
    padding: 0;
  }

  .terminal-card {
    border-radius: 0;
    border-left: none;
    border-right: none;
    height: 100dvh;
    max-width: 100%;
  }

  .chat-card {
    height: 100dvh;
  }

  .chat-header {
    padding: 10px 12px;
  }

  .header-left .brand-title {
    font-size: 14px;
  }

  .badge-tag {
    display: none;
  }

  .messages-container {
    padding: 12px;
    gap: 12px;
  }

  .message-row {
    max-width: 88%;
  }

  .chat-input-bar {
    padding: 8px 10px;
  }

  .send-btn {
    padding: 8px 12px;
  }
}