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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2e3350;
  --accent: #5865f2;
  --accent-hover: #4752c4;
  --text: #e2e5f0;
  --text-muted: #8b92b8;
  --danger: #ed4245;
  --success: #3ba55d;
  --radius: 8px;
  --font: 'Segoe UI', system-ui, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Login ── */
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.login-card h1 { font-size: 1.5rem; text-align: center; }
.login-card p.sub { color: var(--text-muted); font-size: .85rem; text-align: center; margin-top: -.6rem; }

.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-size: .85rem; color: var(--text-muted); }
.field input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: .65rem .9rem;
  font-size: .95rem;
  outline: none;
  transition: border-color .2s;
}
.field input:focus { border-color: var(--accent); }

button.primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: .7rem 1.2rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
  width: 100%;
}
button.primary:hover { background: var(--accent-hover); }

.error-msg { color: var(--danger); font-size: .85rem; text-align: center; min-height: 1.1rem; }

/* ── Chat Layout ── */
body.chat-body {
  align-items: stretch;
  justify-content: stretch;
}

.chat-app {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 100dvh;
  width: 100%;
  height: 100dvh;
}

/* Sidebar */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.sidebar-header .app-name { font-weight: 700; font-size: 1rem; color: var(--accent); }
.sidebar-header .user-info { font-size: .8rem; color: var(--text-muted); }

.sidebar-section {
  padding: .6rem .8rem .3rem;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.group-list { flex: 1; overflow-y: auto; padding: .3rem .5rem; }

.group-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .7rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: .92rem;
  color: var(--text-muted);
  transition: background .15s, color .15s;
}
.group-item:hover { background: var(--surface2); color: var(--text); }
.group-item.active { background: var(--accent); color: #fff; }
.group-item .icon { font-size: 1rem; }

.sidebar-footer {
  padding: .8rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: .5rem;
}
.sidebar-footer button {
  flex: 1;
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .5rem;
  font-size: .8rem;
  cursor: pointer;
  transition: all .2s;
}
.sidebar-footer button:hover { background: var(--border); color: var(--text); }
.sidebar-footer button.admin-btn { color: var(--accent); border-color: var(--accent); }
.sidebar-footer button.admin-btn:hover { background: var(--accent); color: #fff; }

/* Chat main */
.chat-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-header {
  padding: .9rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: .6rem;
  background: var(--surface);
}
.chat-header .group-name { font-weight: 600; font-size: 1rem; }
.chat-header .hash { color: var(--text-muted); font-size: 1.1rem; }

.messages-area {
  flex: 1;
  min-height: 0; /* evita que crezca fuera del contenedor flex */
  overflow-y: auto;
  padding: 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}

/* Empuja los mensajes hacia abajo cuando no llenan el contenedor */
.messages-area::before {
  content: '';
  flex: 1;
}

.msg-day-divider {
  text-align: center;
  color: var(--text-muted);
  font-size: .75rem;
  margin: .8rem 0;
  position: relative;
}
.msg-day-divider::before, .msg-day-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}
.msg-day-divider::before { left: 0; }
.msg-day-divider::after { right: 0; }

.msg-group { margin-top: .8rem; }

.msg-header {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  margin-bottom: .2rem;
}
.msg-header .msg-author { font-weight: 600; font-size: .92rem; }
.msg-header .msg-time { font-size: .73rem; color: var(--text-muted); }

.msg-bubble {
  background: transparent;
  padding: .15rem 0;
  font-size: .93rem;
  line-height: 1.5;
  color: var(--text);
  word-break: break-word;
  flex: 1;
  min-width: 0;
}

.msg-own .msg-author { color: var(--accent); }

.empty-chat {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: .9rem;
  text-align: center;
  flex-direction: column;
  gap: .5rem;
}
.empty-chat .big { font-size: 2.5rem; }

/* Input */
.chat-input-area {
  padding: .8rem 1.2rem;
  border-top: 1px solid var(--border);
}
.chat-input-wrap {
  display: flex;
  gap: .6rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .5rem .7rem;
  transition: border-color .2s;
}
.chat-input-wrap:focus-within { border-color: var(--accent); }
.chat-input-wrap input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: .93rem;
  outline: none;
}
.chat-input-wrap button {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  padding: .3rem .7rem;
  cursor: pointer;
  font-size: .85rem;
  font-weight: 600;
  transition: background .2s;
}
.chat-input-wrap button:hover { background: var(--accent-hover); }
.chat-input-wrap button:disabled { opacity: .4; cursor: not-allowed; }

.no-group-selected {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  flex-direction: column;
  gap: .6rem;
}
.no-group-selected .big { font-size: 3rem; }

/* ── Admin Layout ── */
body.admin-body {
  align-items: stretch;
  justify-content: stretch;
}

.admin-app {
  display: grid;
  grid-template-columns: 200px 1fr;
  width: 100%;
  height: 100dvh;
}

.admin-nav {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1rem .5rem;
  gap: .3rem;
}
.admin-nav .nav-title {
  padding: .5rem .8rem 1rem;
  font-weight: 700;
  color: var(--accent);
  font-size: .95rem;
}
.admin-nav button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: .6rem .8rem;
  border-radius: var(--radius);
  text-align: left;
  cursor: pointer;
  font-size: .9rem;
  transition: all .15s;
}
.admin-nav button:hover { background: var(--surface2); color: var(--text); }
.admin-nav button.active { background: var(--accent); color: #fff; }
.admin-nav .nav-spacer { flex: 1; }
.admin-nav .logout-btn { color: var(--danger); }
.admin-nav .logout-btn:hover { background: var(--danger); color: #fff; }

.admin-content {
  overflow-y: auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.admin-section { display: none; flex-direction: column; gap: 1.2rem; }
.admin-section.visible { display: flex; }

.admin-section h2 { font-size: 1.3rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.card h3 { font-size: 1rem; color: var(--text-muted); font-weight: 600; }

.form-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.form-row input, .form-row select {
  flex: 1;
  min-width: 120px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: .55rem .8rem;
  font-size: .88rem;
  outline: none;
}
.form-row input:focus, .form-row select:focus { border-color: var(--accent); }
.form-row button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: .55rem 1rem;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
  white-space: nowrap;
}
.form-row button:hover { background: var(--accent-hover); }
.form-row button.danger { background: var(--danger); }
.form-row button.danger:hover { background: #c0393b; }

.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.data-table th {
  text-align: left;
  padding: .5rem .7rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.data-table td { padding: .55rem .7rem; border-bottom: 1px solid var(--border); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface2); }

.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 99px;
  font-size: .75rem;
  font-weight: 600;
}
.badge.admin  { background: #5865f222; color: var(--accent);   border: 1px solid var(--accent); }
.badge.user   { background: #3ba55d22; color: var(--success);  border: 1px solid var(--success); }
.badge.guest  { background: #f0a50022; color: #f0a500;         border: 1px solid #f0a500; }
.badge.public { background: #3ba55d22; color: var(--success);  border: 1px solid var(--success); font-size:.72rem; }

.tag-list { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: .15rem .55rem;
  font-size: .78rem;
  display: flex;
  align-items: center;
  gap: .3rem;
}
.tag button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: .8rem;
  padding: 0;
  line-height: 1;
}
.tag button:hover { color: var(--danger); }

.action-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: .25rem .6rem;
  font-size: .8rem;
  cursor: pointer;
  transition: all .15s;
}
.action-btn:hover { border-color: var(--danger); color: var(--danger); }

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--success);
  color: #fff;
  padding: .7rem 1.2rem;
  border-radius: var(--radius);
  font-size: .88rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(10px);
  transition: all .3s;
  pointer-events: none;
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Bubble wrap + reactions ── */
.msg-bubble-wrap {
  position: relative;
  margin-bottom: .1rem;
}

.bubble-row {
  display: flex;
  align-items: flex-start;
  gap: .4rem;
}

.react-add-btn {
  flex-shrink: 0;
  opacity: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  font-size: .78rem;
  padding: .1rem .35rem;
  cursor: pointer;
  transition: opacity .15s;
  align-self: center;
  line-height: 1.4;
  white-space: nowrap;
}
.bubble-row:hover .react-add-btn { opacity: 1; }
.react-add-btn:hover { background: var(--border); color: var(--text); }

.emoji-picker {
  position: absolute;
  bottom: calc(100% + 4px);
  left: 0;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .35rem .4rem;
  display: flex;
  gap: .15rem;
  box-shadow: 0 4px 16px rgba(0,0,0,.45);
}
.emoji-picker button {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 4px;
  padding: .15rem .25rem;
  line-height: 1;
  transition: background .12s;
}
.emoji-picker button:hover { background: var(--surface2); }

.reactions-row {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  margin-top: .25rem;
}

.reaction-badge {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: .1rem .5rem;
  font-size: .8rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  color: var(--text);
  line-height: 1.5;
}
.reaction-badge:hover { border-color: var(--accent); }
.reaction-badge.mine { background: #5865f218; border-color: var(--accent); }
.reaction-badge span { font-size: .75rem; color: var(--text-muted); }

/* ── Load more button ── */
.load-more-btn {
  display: block;
  width: fit-content;
  margin: .6rem auto 1rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  padding: .4rem 1.1rem;
  font-size: .82rem;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.load-more-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--text); }
.load-more-btn:disabled { opacity: .5; cursor: wait; }

/* ── Botón volver (solo visible en móvil) ── */
.back-btn {
  display: none;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: .3rem .4rem;
  border-radius: var(--radius);
  font-size: 1.2rem;
  line-height: 1;
  flex-shrink: 0;
  transition: color .15s;
}
.back-btn:hover { color: var(--text); }

/* ── Mobile ── */
@media (max-width: 640px) {
  /* El chat-app se convierte en contenedor de posicionamiento */
  .chat-app {
    grid-template-columns: 1fr;
    position: relative;
    overflow: hidden;
  }

  /* Sidebar ocupa toda la pantalla por defecto */
  .sidebar {
    position: absolute;
    inset: 0;
    width: 100%;
    z-index: 10;
    transform: translateX(0);
    transition: transform .28s cubic-bezier(.4,0,.2,1);
  }

  /* Chat empieza fuera de pantalla a la derecha */
  .chat-main {
    position: absolute;
    inset: 0;
    width: 100%;
    transform: translateX(100%);
    transition: transform .28s cubic-bezier(.4,0,.2,1);
  }

  /* Al seleccionar grupo: sidebar sale a la izquierda, chat entra */
  .chat-app.chat-open .sidebar {
    transform: translateX(-100%);
  }
  .chat-app.chat-open .chat-main {
    transform: translateX(0);
  }

  /* Mostrar botón volver */
  .back-btn { display: flex; }

  /* Targets táctiles más grandes */
  .group-item {
    padding: .85rem .9rem;
    font-size: 1rem;
  }

  /* Evita zoom automático en iOS al enfocar el input (mínimo 16px) */
  .chat-input-wrap input {
    font-size: 1rem;
  }

  .chat-input-area {
    padding: .75rem .9rem;
    /* Empuja el input por encima del safe-area en teléfonos con notch inferior */
    padding-bottom: max(.75rem, env(safe-area-inset-bottom));
  }

  .chat-header {
    padding: .75rem .9rem;
  }

  .messages-area {
    padding: .8rem .9rem;
  }

  .sidebar-header {
    padding: 1rem .9rem;
  }

  .sidebar-footer {
    padding: .9rem;
    /* Safe area para iPhone con barra home */
    padding-bottom: max(.9rem, env(safe-area-inset-bottom));
  }

  .sidebar-footer button {
    padding: .75rem .5rem;
    font-size: .85rem;
  }

  .no-group-selected {
    /* No aplica en móvil porque la sidebar es la pantalla de selección */
    display: none;
  }
}