:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #e3e5e9;
  --text: #1c1e21;
  --muted: #6b7280;
  --accent: #3b82f6;
  --accent-fg: #ffffff;
  --online: #22c55e;
  --bubble-own: #dbeafe;
  --bubble-other: #f1f2f4;
  --divider: #ef4444;
}

* {
  box-sizing: border-box;
}

/* [hidden] должен побеждать display:flex/block из классов на том же элементе
   (иначе авторский класс с равной специфичностью перебивает UA-правило). */
[hidden] {
  display: none !important;
}

.locale-switch {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 300;
  display: flex;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
}

.locale-btn {
  border: none;
  background: transparent;
  padding: 4px 9px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--muted);
}

.locale-btn.active {
  background: var(--accent);
  color: var(--accent-fg);
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---------- Auth ---------- */

.auth-view {
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 320px;
  max-width: 90vw;
}

.auth-card h1 {
  margin: 0 0 20px;
  font-size: 22px;
  text-align: center;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-radius: 8px;
  background: var(--bg);
  padding: 4px;
}

.auth-tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--muted);
  font-weight: 500;
}

.auth-tab.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.auth-form input,
.auth-form select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.auth-form button[type="submit"] {
  margin-top: 6px;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  cursor: pointer;
}

.auth-error {
  color: #dc2626;
  font-size: 13px;
  margin: 0;
}

.pending-text {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin: 0 0 20px;
  text-align: center;
}

#pending-logout-btn {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  font-weight: 600;
}

/* ---------- Chat layout ---------- */

body:has(.chat-view:not([hidden])) {
  background: #0b0c0e;
}

.chat-view {
  height: 100vh;
  height: 100dvh;
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  box-shadow: 0 0 0 1px var(--border);
}

.participants {
  width: 260px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.participants-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

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

#settings-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 15px;
  color: var(--muted);
  padding: 2px;
}

#logout-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border);
  min-height: 0;
}

.sidebar-section-grow {
  flex: 1;
  min-height: 0;
  border-bottom: none;
}

.sidebar-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.sidebar-section-title button {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}

#channels-list,
#participants-list {
  list-style: none;
  margin: 0;
  padding: 4px 8px 8px;
  overflow-y: auto;
}

#channels-list {
  max-height: 220px;
}

#channels-list li,
#participants-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}

#channels-list li:hover,
#participants-list li:hover {
  background: var(--bg);
}

.channel-row.active {
  background: var(--bubble-own);
}

.channel-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.unread-badge {
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  padding: 1px 7px;
  flex-shrink: 0;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 14px;
  min-height: 45px;
}

#back-to-chats-btn {
  display: none;
  flex-shrink: 0;
  border: none;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
  color: var(--muted);
  padding: 0 4px 0 0;
}

#chat-header-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #9ca3af;
  border: 1px solid rgba(0, 0, 0, 0.25);
  flex-shrink: 0;
}

.status-dot.online {
  background: var(--online);
  box-shadow: 0 0 4px var(--online);
}

.participant-avatar {
  font-size: 16px;
  line-height: 1;
}

.participant-lang {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.load-more {
  align-self: center;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}

.msg {
  max-width: 60%;
  padding: 8px 12px;
  border-radius: 12px;
  background: var(--bubble-other);
  align-self: flex-start;
}

.msg.own {
  background: var(--bubble-own);
  align-self: flex-end;
}

.msg-author {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 2px;
}

.msg-text {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
}

.msg-original-toggle,
.msg-translate-toggle {
  margin-top: 4px;
  font-size: 11px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  border: none;
  background: none;
  padding: 0;
}

.msg-original {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

.msg-image {
  max-width: 260px;
  max-height: 260px;
  border-radius: 8px;
  margin-top: 4px;
  cursor: zoom-in;
  display: block;
}

.msg-time {
  font-size: 10px;
  color: var(--muted);
}

.unread-divider {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--divider);
  font-size: 12px;
  align-self: stretch;
  margin: 6px 0;
}

.unread-divider::before,
.unread-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--divider);
  opacity: 0.4;
}

.translate-preview {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  font-size: 13px;
  color: var(--text);
}

.translate-preview span:first-child {
  flex: 1;
  white-space: pre-wrap;
  word-break: break-word;
}

#translate-preview-close {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.send-form {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}

#translate-btn,
#attach-btn {
  flex-shrink: 0;
  border: none;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

#translate-btn {
  opacity: 0.75;
}

#translate-btn:hover,
#attach-btn:hover {
  opacity: 1;
  background: var(--bg);
}

.attach-preview {
  font-size: 12px;
  color: var(--muted);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#text-input {
  flex: 1;
  min-width: 0;
  max-height: 140px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.4;
  resize: none;
  overflow-y: auto;
}

#send-btn {
  flex-shrink: 0;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  cursor: pointer;
}

#send-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  padding: 24px;
  z-index: 100;
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
}

/* ---------- Settings modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
}

.modal {
  background: var(--panel);
  border-radius: 12px;
  border: 1px solid var(--border);
  width: 380px;
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
}

.modal-wide {
  width: 560px;
  max-width: 100%;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.modal-header h2 {
  margin: 0;
  font-size: 18px;
}

#settings-close-btn {
  border: none;
  background: transparent;
  font-size: 16px;
  cursor: pointer;
  color: var(--muted);
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

.settings-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-label {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.settings-form input,
.settings-form select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
}

.field-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.settings-form button[type="submit"] {
  margin-top: 4px;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  cursor: pointer;
}

.form-message {
  font-size: 13px;
  margin: 0;
  color: var(--muted);
}

.form-message.error {
  color: #dc2626;
}

.form-message.success {
  color: #16a34a;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
  margin-bottom: 4px;
}

.avatar-option {
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 8px;
  font-size: 18px;
  padding: 6px 0;
  cursor: pointer;
}

.avatar-option.selected {
  border-color: var(--accent);
  background: var(--bubble-own);
}

/* ---------- Admin ---------- */

.admin-stats {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 12px;
}

.admin-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 50vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.admin-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
}

.admin-list .admin-item-name {
  flex: 1 1 100%;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
}

.admin-list .admin-item-meta {
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
}

.admin-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 1px 6px;
  border-radius: 999px;
  flex-shrink: 0;
}

.admin-badge.admin {
  background: var(--accent);
  color: var(--accent-fg);
}

.admin-badge.banned {
  background: #dc2626;
  color: #fff;
}

.admin-badge.pending {
  background: #f59e0b;
  color: #fff;
}

.admin-list button {
  flex-shrink: 0;
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 11px;
  cursor: pointer;
  color: var(--text);
}

.admin-list button.danger {
  border-color: #dc2626;
  color: #dc2626;
}

.msg-bottom-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.msg-delete-btn {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  opacity: 0.6;
}

.msg-delete-btn:hover {
  opacity: 1;
  color: #dc2626;
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .chat-view {
    max-width: 100%;
    box-shadow: none;
  }

  .participants,
  .chat-main {
    width: 100%;
  }

  /* Мобильный экран показывает либо список чатов, либо открытый чат —
     не оба одновременно (места не хватает). Переключается классом chat-open
     на .chat-view из app.js при выборе чата / кнопке "назад". */
  .chat-main {
    display: none;
  }

  .chat-view.chat-open .participants {
    display: none;
  }

  .chat-view.chat-open .chat-main {
    display: flex;
  }

  #back-to-chats-btn {
    display: inline-flex;
  }

  .participants-header,
  .chat-header {
    padding-right: 96px; /* место для фиксированного переключателя языка в углу */
  }

  .participants-header {
    padding-top: calc(14px + env(safe-area-inset-top, 0px));
  }

  .chat-header {
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
  }

  .locale-switch {
    top: calc(10px + env(safe-area-inset-top, 0px));
  }

  .send-form {
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  }

  .msg {
    max-width: 85%;
  }

  .modal {
    width: 100%;
  }

  .avatar-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181c;
    --panel: #1f2125;
    --border: #2c2e33;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --bubble-own: #1e3a5f;
    --bubble-other: #2a2c31;
  }
}