/* browclode — liquid glass */
:root {
  --bg1: #0b1020;
  --bg2: #131a33;
  --glass: rgba(255, 255, 255, 0.07);
  --glass-strong: rgba(255, 255, 255, 0.11);
  --border: rgba(255, 255, 255, 0.14);
  --border-soft: rgba(255, 255, 255, 0.08);
  --text: #eef1fa;
  --muted: #9aa3c0;
  --accent: #7c8cff;
  --accent2: #57d0c4;
  --danger: #ff6b81;
  --radius: 18px;
}

* { box-sizing: border-box; }
/* атрибут hidden должен побеждать любые display-правила (фикс превью вложения) */
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(120% 140% at 15% 0%, var(--bg2), var(--bg1) 60%);
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
}

/* парящие «капли» на фоне */
.bg-orbs { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.bg-orbs i {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5;
  animation: drift 24s ease-in-out infinite alternate;
}
.bg-orbs i:nth-child(1) { width: 46vw; height: 46vw; left: -12vw; top: -14vw;
  background: #3d4fd8; }
.bg-orbs i:nth-child(2) { width: 38vw; height: 38vw; right: -10vw; top: 26vh;
  background: #1f8f85; animation-delay: -8s; }
.bg-orbs i:nth-child(3) { width: 30vw; height: 30vw; left: 30vw; bottom: -16vw;
  background: #7a3dd8; animation-delay: -16s; }
@keyframes drift {
  to { transform: translate(6vw, 4vh) scale(1.12); }
}

.glass {
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(1.5);
  -webkit-backdrop-filter: blur(22px) saturate(1.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.35),
              inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.logo { font-size: 22px; font-weight: 800; letter-spacing: .3px; }
.logo span { background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ————— кнопки ————— */
.btn {
  border: 1px solid var(--border); border-radius: 12px; cursor: pointer;
  padding: 8px 14px; font: inherit; font-size: 13px; color: var(--text);
  background: var(--glass-strong); transition: .18s;
}
.btn:hover { background: rgba(255,255,255,.18); transform: translateY(-1px); }
.btn-primary { background: linear-gradient(90deg, var(--accent), #5f6fff);
  border: none; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-danger { color: #ffd7dd; border-color: rgba(255,107,129,.45);
  background: rgba(255,107,129,.14); }
.btn-ghost { background: transparent; }
.icon-btn {
  border: none; background: transparent; color: var(--muted); cursor: pointer;
  font-size: 16px; padding: 6px 8px; border-radius: 10px; transition: .15s;
}
.icon-btn:hover { color: var(--text); background: rgba(255,255,255,.1); }

/* ————— вход ————— */
.login-wrap { display: grid; place-items: center; height: 100vh; height: 100dvh;
  padding: 20px; }
.login-card { width: 340px; padding: 34px 30px; text-align: center;
  display: flex; flex-direction: column; gap: 14px; }
.login-sub { margin: 0; color: var(--muted); font-size: 13px; }
.login-error { color: #ffb3bf; font-size: 13px; }
.glass-input {
  border: 1px solid var(--border); border-radius: 12px; padding: 11px 14px;
  background: rgba(0,0,0,.25); color: var(--text); font: inherit; outline: none;
}
.glass-input:focus { border-color: var(--accent); }

/* ————— раскладка ————— */
.layout { display: flex; height: 100vh; height: 100dvh; padding: 16px; gap: 16px; }
.sidebar {
  width: 300px; min-width: 300px; display: flex; flex-direction: column;
  padding: 18px 14px; overflow: hidden;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between;
  padding: 0 6px 14px; }
.sidebar-head-actions { display: flex; align-items: center; gap: 2px; }
.sidebar-close { display: none; font-size: 15px; }
.sidebar-backdrop { display: none; }
.burger-fab { display: none; }
.new-dialog { padding: 4px 4px 14px; border-bottom: 1px solid var(--border-soft); }
.new-label { font-size: 12px; color: var(--muted); margin: 0 4px 8px;
  text-transform: uppercase; letter-spacing: .6px; }
.mode-row { display: flex; gap: 6px; }
.mode-btn {
  flex: 1; border: 1px solid var(--border); background: var(--glass);
  color: var(--text); border-radius: 12px; padding: 9px 4px; cursor: pointer;
  font: inherit; font-size: 12.5px; transition: .18s; white-space: nowrap;
}
.mode-btn:hover { background: rgba(124,140,255,.22); border-color: var(--accent);
  transform: translateY(-1px); }

.dialog-list { flex: 1; overflow-y: auto; padding: 10px 2px; display: flex;
  flex-direction: column; gap: 6px; }
.dialog-item {
  display: flex; align-items: center; gap: 9px; padding: 10px 10px;
  border-radius: 13px; cursor: pointer; border: 1px solid transparent;
  transition: .15s;
}
.dialog-item:hover { background: rgba(255,255,255,.07); }
.dialog-item.active { background: rgba(124,140,255,.16);
  border-color: rgba(124,140,255,.4); }
.dialog-item .d-icon { font-size: 16px; }
.dialog-item .d-body { flex: 1; min-width: 0; }
.dialog-item .d-title { font-size: 13.5px; white-space: nowrap; overflow: hidden;
  text-overflow: ellipsis; }
.dialog-item .d-meta { font-size: 11px; color: var(--muted); }
.dialog-item .d-del { opacity: 0; font-size: 13px; }
.dialog-item:hover .d-del { opacity: 1; }
.dialog-item .d-pin { opacity: 0; font-size: 13px; }
.dialog-item:hover .d-pin { opacity: 1; }
.dialog-item .d-pin.pinned { opacity: .85; color: var(--accent2); }
.icon-btn.pinned { color: var(--accent2); background: rgba(87,208,196,.14); }
.d-running { width: 8px; height: 8px; border-radius: 50%; background: var(--accent2);
  box-shadow: 0 0 8px var(--accent2); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }

/* ————— чат ————— */
.main { flex: 1; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.chat-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; }
.chat-title { flex: 1; font-weight: 600; white-space: nowrap; overflow: hidden;
  text-overflow: ellipsis; cursor: pointer; }
.chat-title:hover { color: var(--accent2); }
.head-actions { display: flex; gap: 8px; }
.burger { display: none; }
.mode-badge {
  font-size: 11.5px; padding: 4px 10px; border-radius: 999px;
  background: rgba(124,140,255,.18); border: 1px solid rgba(124,140,255,.4);
  white-space: nowrap;
}
.mode-badge.ask { background: rgba(87,208,196,.15); border-color: rgba(87,208,196,.4); }
.mode-badge.translate { background: rgba(255,183,77,.14); border-color: rgba(255,183,77,.4); }

.chat-scroll { flex: 1; overflow-y: auto; padding: 6px 4px; scroll-behavior: smooth; }
.welcome { max-width: 520px; margin: 10vh auto 0; padding: 30px 34px; }
.welcome-logo { font-size: 30px; font-weight: 800; margin-bottom: 8px; }
.welcome-logo span { background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.welcome ul { padding-left: 18px; color: var(--text); }
.welcome li { margin: 6px 0; }
.muted { color: var(--muted); }

.messages { max-width: 880px; margin: 0 auto; display: flex;
  flex-direction: column; gap: 12px; padding: 8px 10px 4px; }
.msg { max-width: 78%; padding: 12px 16px; border-radius: 18px; font-size: 14.5px;
  overflow-wrap: break-word; animation: rise .25s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, rgba(124,140,255,.32), rgba(95,111,255,.22));
  border: 1px solid rgba(124,140,255,.42);
  backdrop-filter: blur(14px);
  border-bottom-right-radius: 6px;
}
.msg.assistant {
  align-self: flex-start; background: var(--glass);
  border: 1px solid var(--border); backdrop-filter: blur(14px);
  border-bottom-left-radius: 6px;
}
.msg.error { align-self: flex-start; background: rgba(255,107,129,.12);
  border: 1px solid rgba(255,107,129,.4); color: #ffd7dd; }
.msg img.att { max-width: 260px; border-radius: 12px; display: block;
  margin-bottom: 6px; }
.msg .time { display: block; font-size: 10.5px; color: var(--muted);
  margin-top: 6px; text-align: right; }

/* markdown внутри ответов */
.msg pre { background: rgba(0,0,0,.38); border: 1px solid var(--border-soft);
  border-radius: 10px; padding: 10px 12px; overflow-x: auto; font-size: 13px; }
.msg code { background: rgba(0,0,0,.32); border-radius: 6px; padding: 1px 6px;
  font-size: 13px; }
.msg pre code { background: none; padding: 0; }
.msg h1, .msg h2, .msg h3 { margin: 10px 0 6px; font-size: 1.05em; }
.msg ul, .msg ol { margin: 6px 0; padding-left: 20px; }
.msg p { margin: 6px 0; }
.msg a { color: var(--accent2); }
.msg table { border-collapse: collapse; margin: 8px 0; }
.msg th, .msg td { border: 1px solid var(--border); padding: 4px 9px;
  font-size: 13px; }

/* ————— прогресс ————— */
.progress { max-width: 880px; margin: 12px auto 0; padding: 14px 18px; }
.progress-head { display: flex; align-items: center; gap: 10px; font-weight: 600;
  font-size: 13.5px; }
.spinner { width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.25); border-top-color: var(--accent2);
  animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.progress-lines { margin-top: 8px; display: flex; flex-direction: column; gap: 3px; }
.progress-lines div { font-size: 12.5px; color: var(--muted); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; }
.progress-lines div:last-child { color: var(--text); }

/* ————— композер ————— */
.composer-wrap { padding: 0 4px; }
.limit-note {
  max-width: 880px; margin: 0 auto 10px; padding: 10px 16px;
  font-size: 13px; color: #ffe2a8; text-align: center;
  border-color: rgba(255,183,77,.45); background: rgba(255,183,77,.10);
}
.composer { max-width: 880px; margin: 0 auto; padding: 10px 12px; }
.composer-row { display: flex; align-items: flex-end; gap: 8px; }
#input {
  flex: 1; resize: none; border: none; outline: none; background: transparent;
  color: var(--text); font: inherit; max-height: 180px; padding: 8px 4px;
}
#input::placeholder { color: var(--muted); }
.send-btn {
  width: 40px; height: 40px; border-radius: 13px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #5f6fff); color: #fff;
  font-size: 16px; transition: .18s; flex-shrink: 0;
}
.send-btn:hover { filter: brightness(1.12); transform: translateY(-1px); }
.send-btn:disabled { opacity: .45; cursor: default; transform: none; }
.attach-preview { position: relative; display: inline-block; margin: 4px 6px 8px; }
.attach-preview img { height: 64px; border-radius: 10px; display: block; }
.attach-preview .icon-btn { position: absolute; top: -8px; right: -8px;
  background: rgba(0,0,0,.6); font-size: 11px; }

/* ————— мобильная версия ————— */
/* на тач-экранах нет hover — кнопки закрепить/удалить видны всегда */
@media (hover: none) {
  .dialog-item .d-pin, .dialog-item .d-del { opacity: .55; }
  .dialog-item .d-pin.pinned { opacity: .85; }
  .btn:hover, .send-btn:hover, .mode-btn:hover { transform: none; }
}

@media (max-width: 800px) {
  .layout {
    padding: 8px;
    padding-left: max(8px, env(safe-area-inset-left));
    padding-right: max(8px, env(safe-area-inset-right));
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    gap: 8px;
  }
  .main { gap: 8px; }

  /* сайдбар — выдвижная панель поверх чата */
  .sidebar {
    position: fixed; z-index: 30; left: 8px; top: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    width: min(320px, calc(100vw - 16px)); min-width: 0;
    transform: translateX(calc(-100% - 16px));
    transition: transform .25s ease;
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
  }
  .sidebar.open { transform: none; }
  .sidebar-close { display: block; }
  .sidebar-backdrop {
    display: block; position: fixed; inset: 0; z-index: 25;
    background: rgba(5, 8, 20, 0.55); opacity: 0; pointer-events: none;
    transition: opacity .25s ease;
  }
  .sidebar-backdrop.show { opacity: 1; pointer-events: auto; }
  .burger { display: block; }

  /* плавающая кнопка меню на экране приветствия (шапки чата там нет) */
  body.no-dialog .burger-fab {
    display: grid; place-items: center; position: fixed; z-index: 20;
    left: 12px; top: 12px; width: 44px; height: 44px;
    border-radius: 14px; cursor: pointer; color: var(--text);
    font-size: 18px; padding: 0;
  }

  /* шапка чата: компактнее, кнопки без подписей */
  .chat-head { padding: 10px 10px; gap: 6px; }
  .head-actions { gap: 2px; }
  .btn-label { display: none; }
  .btn { padding: 8px 10px; }
  .badge-label { display: none; }
  .mode-badge { font-size: 14px; padding: 4px 8px; }

  .welcome { margin: 60px auto 0; padding: 22px 20px; }
  .welcome-logo { font-size: 24px; }

  .chat-scroll { padding: 2px 0; }
  .messages { padding: 6px 2px 4px; }
  .msg { max-width: 90%; padding: 10px 13px; }
  .msg img.att { max-width: 100%; }
  .msg pre { font-size: 12px; }

  .progress { margin: 10px 4px 0; padding: 12px 14px; }

  /* композер: 16px шрифт — иначе iOS зумит страницу при фокусе */
  .composer-wrap { padding: 0; }
  .composer { padding: 8px 10px; }
  #input { font-size: 16px; max-height: 132px; }
  .send-btn { width: 44px; height: 44px; }

  /* тяжёлый blur тормозит на слабых телефонах */
  .glass { backdrop-filter: blur(14px) saturate(1.4);
    -webkit-backdrop-filter: blur(14px) saturate(1.4); }
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.14); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }