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

:root {
  --bg: #1e1e2e;
  --surface: #2a2a3e;
  --surface2: #313147;
  --border: #3a3a5c;
  --text: #cdd6f4;
  --text-dim: #7f849c;
  --accent: #89b4fa;
  --accent-hover: #74a8f8;
  --danger: #f38ba8;
  --success: #a6e3a1;
  --my-msg: #313155;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; }

#app { height: 100%; display: flex; flex-direction: column; }

/* --- Layout --- */
.layout { display: flex; height: 100dvh; overflow: hidden; }

.sidebar {
  width: 260px; flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
}

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

/* --- Sidebar --- */
.sidebar-header {
  padding: 16px;
  padding-top: calc(16px + env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.sidebar-title { font-weight: 600; font-size: 16px; }

.room-list { flex: 1; overflow-y: auto; padding: 8px; }

.room-item {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  display: flex; align-items: center; gap: 10px;
  transition: background 0.1s;
}
.room-item:hover { background: var(--surface2); }
.room-item.active { background: var(--surface2); }
.room-item-name { font-weight: 500; }
.room-item-preview { font-size: 13px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sidebar-footer {
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.user-display { font-size: 14px; font-weight: 500; flex: 1; }
.user-username { font-size: 12px; color: var(--text-dim); }

/* --- Chat area --- */
.chat-header {
  padding: 14px 20px;
  padding-top: calc(14px + env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-weight: 600; font-size: 16px;
  display: flex; align-items: center; gap: 10px;
}

.messages-container { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; justify-content: flex-end; gap: 4px; }

.message {
  display: flex; flex-direction: column;
  max-width: 70%;
  align-self: flex-start;
}
.message.mine { align-self: flex-end; }

.message-bubble {
  background: var(--surface2);
  padding: 8px 12px;
  border-radius: var(--radius);
  border-bottom-left-radius: 4px;
  line-height: 1.5;
  word-break: break-word;
}
.message.mine .message-bubble {
  background: var(--my-msg);
  border-bottom-left-radius: var(--radius);
  border-bottom-right-radius: 4px;
}

.message-meta {
  font-size: 11px; color: var(--text-dim);
  padding: 2px 4px;
  display: flex; gap: 6px;
}
.message.mine .message-meta { justify-content: flex-end; }
.message-author { font-weight: 500; color: var(--accent); }

.typing-indicator { padding: 4px 16px; font-size: 12px; color: var(--text-dim); min-height: 20px; }

/* --- Input --- */
.input-area {
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--surface);
  display: flex; gap: 8px; align-items: flex-end;
}

.msg-input {
  flex: 1; background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: var(--text); font-size: 15px; font-family: var(--font);
  resize: none; max-height: 120px; outline: none;
  line-height: 1.5;
}
.msg-input:focus { border-color: var(--accent); }

.btn {
  padding: 10px 18px; border: none; border-radius: 8px;
  cursor: pointer; font-size: 14px; font-weight: 500; transition: background 0.15s;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn-danger { background: var(--danger); color: var(--bg); }
.btn-icon { padding: 8px; background: transparent; border: none; cursor: pointer; color: var(--text-dim); border-radius: 6px; }
.btn-icon:hover { background: var(--surface2); color: var(--text); }

/* --- Auth / Invite screens --- */
.center-screen {
  display: flex; align-items: center; justify-content: center;
  height: 100%; background: var(--bg);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%; max-width: 400px;
}

.card h1 { font-size: 22px; margin-bottom: 24px; }
.card h2 { font-size: 18px; margin-bottom: 20px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--text-dim); }

.input {
  width: 100%; padding: 10px 12px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 15px; outline: none;
}
.input:focus { border-color: var(--accent); }

.error-msg { color: var(--danger); font-size: 13px; margin-top: 12px; }

/* --- Admin panel --- */
.admin-panel { padding: 20px; flex: 1; overflow-y: auto; }
.admin-panel h2 { font-size: 18px; margin-bottom: 16px; }

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { color: var(--text-dim); font-weight: 500; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; }
.badge-green { background: rgba(166,227,161,0.15); color: var(--success); }
.badge-dim { background: rgba(127,132,156,0.15); color: var(--text-dim); }

/* --- Nav tabs --- */
.tabs { display: flex; gap: 4px; padding: 8px 16px; padding-top: calc(8px + env(safe-area-inset-top)); border-bottom: 1px solid var(--border); background: var(--surface); }
.tab { padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: 14px; color: var(--text-dim); }
.tab:hover { background: var(--surface2); color: var(--text); }
.tab.active { background: var(--surface2); color: var(--text); }

/* --- Misc --- */
.empty-state { text-align: center; color: var(--text-dim); padding: 48px 20px; }
.invite-link-box {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px; font-size: 13px; word-break: break-all;
  display: flex; gap: 8px; align-items: center;
}
.invite-link-text { flex: 1; color: var(--accent); }

/* --- iOS Install Banner --- */
.ios-install-banner {
  position: fixed;
  bottom: calc(20px + env(safe-area-inset-bottom));
  left: 16px; right: 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 12px 14px 16px;
  display: flex; align-items: center; gap: 10px;
  z-index: 200;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
  animation: slide-up 0.25s ease;
}
.ios-install-text { flex: 1; font-size: 14px; line-height: 1.5; }
.ios-install-text strong { color: var(--accent); }
.ios-install-arrow {
  position: absolute;
  bottom: -8px; left: 50%;
  transform: translateX(-50%);
  width: 14px; height: 8px;
  background: var(--surface2);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  border-bottom: 1px solid var(--border);
}
@keyframes slide-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 9;
}

.mobile-menu-btn { display: none; }

/* Хедер в мультирум-режиме: на десктопе скрыт (сайдбар всегда виден) */
#room-header { display: none; }
@media (max-width: 600px) {
  #room-header { display: flex; }
}

/* Mobile */
@media (max-width: 600px) {
  .chat-header {
    padding-top: calc(8px + env(safe-area-inset-top));
    padding-bottom: 8px;
  }

  .sidebar {
    width: 280px;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 10;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.visible { display: block; }
  .mobile-menu-btn { display: flex; }
  .message { max-width: 90%; }
}