:root {
  --bg: #0e1621;
  --sidebar: #17212b;
  --panel: #17212b;
  --panel-2: #202b36;
  --panel-3: #242f3d;
  --border: rgba(255,255,255,.065);
  --accent: #2aabee;
  --accent-hover: #43b4ed;
  --accent-soft: rgba(42,171,238,.14);
  --bubble-out: #2b5278;
  --bubble-in: #182533;
  --text: #f5f5f5;
  --muted: #8f9ba7;
  --muted-2: #6f7c88;
  --green: #48c774;
  --red: #e35d6a;
  --shadow: 0 14px 44px rgba(0,0,0,.35);
  --sidebar-width: 365px;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; }
body {
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
button, input, textarea { font: inherit; }
button { color: inherit; }
button, .chat-row { -webkit-tap-highlight-color: transparent; }
.hidden { display: none !important; }
.mobile-only { display: none !important; }

.auth-view {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% -10%, rgba(42,171,238,.16), transparent 42%),
    var(--bg);
}
.auth-card {
  width: min(410px, 100%);
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.logo-mark, .empty-logo {
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #36aeea, #2387c5);
  color: white;
  font-weight: 800;
  letter-spacing: -.05em;
}
.logo-mark {
  width: 82px;
  height: 82px;
  margin: 0 auto 18px;
  border-radius: 50%;
  font-size: 26px;
}
.auth-card h1 {
  margin: 0;
  text-align: center;
  font-size: 28px;
}
.tagline {
  margin: 6px 0 25px;
  text-align: center;
  color: var(--muted);
}
.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  border-radius: 12px;
  background: #111b25;
}
.auth-tab {
  min-height: 42px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.auth-tab.active {
  background: var(--panel-3);
  color: white;
}
.field {
  display: block;
  margin-top: 16px;
}
.field > span {
  display: block;
  margin: 0 0 7px 3px;
  color: var(--muted);
  font-size: 13px;
}
.field input, .field textarea {
  width: 100%;
  border: 1px solid #334250;
  border-radius: 11px;
  outline: 0;
  background: #101923;
  color: white;
  transition: border-color .15s, box-shadow .15s;
}
.field input {
  height: 50px;
  padding: 0 14px;
}
.field textarea {
  resize: vertical;
  min-height: 84px;
  padding: 12px 14px;
}
.field input:focus, .field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42,171,238,.11);
}
.primary-button {
  width: 100%;
  min-height: 48px;
  margin-top: 22px;
  border: 0;
  border-radius: 11px;
  background: var(--accent);
  color: white;
  font-weight: 650;
  cursor: pointer;
}
.primary-button:hover { background: var(--accent-hover); }
.primary-button:disabled { opacity: .55; cursor: progress; }
.form-error {
  min-height: 18px;
  margin-top: 10px;
  color: #ff929c;
  text-align: center;
  font-size: 13px;
}
.language-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}
.language-button {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.language-button:hover { color: white; background: rgba(255,255,255,.04); }

.messenger {
  width: 100vw;
  height: 100dvh;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  background: #0b141d;
}
.sidebar {
  min-width: 0;
  display: grid;
  grid-template-rows: 64px 58px minmax(0, 1fr) 64px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
}
.sidebar-header, .chat-header, .account-footer {
  display: flex;
  align-items: center;
}
.sidebar-header {
  gap: 11px;
  padding: 8px 12px;
}
.brand-small {
  min-width: 0;
  flex: 1;
}
.brand-small strong {
  display: block;
  font-size: 18px;
}
.brand-small span {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  margin-top: 1px;
  color: var(--muted);
  font-size: 11px;
}
.round-icon, .composer-icon, .send-button {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 0;
  cursor: pointer;
}
.round-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: transparent;
  color: #b8c4cf;
  font-size: 20px;
}
.round-icon:hover { background: rgba(255,255,255,.06); color: white; }
.round-icon.accent {
  background: var(--accent);
  color: white;
}
.search-wrap {
  position: relative;
  padding: 8px 12px 9px;
}
.search-wrap input {
  width: 100%;
  height: 40px;
  padding: 0 14px 0 39px;
  border: 0;
  border-radius: 20px;
  outline: 0;
  background: #242f3d;
  color: white;
}
.search-wrap input:focus { box-shadow: 0 0 0 2px rgba(42,171,238,.3); }
.search-icon {
  position: absolute;
  z-index: 2;
  left: 25px;
  top: 18px;
  color: var(--muted);
}
.chat-list {
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #344250 transparent;
}
.chat-row {
  width: 100%;
  display: grid;
  grid-template-columns: 54px minmax(0,1fr);
  gap: 10px;
  padding: 9px 12px;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}
.chat-row:hover { background: rgba(255,255,255,.035); }
.chat-row.active { background: #2b5278; }
.chat-row.active .chat-preview,
.chat-row.active .chat-time { color: rgba(255,255,255,.75); }
.avatar {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: linear-gradient(145deg, #37aeea, #2784bd);
  color: white;
  font-weight: 700;
  user-select: none;
}
.avatar.large { width: 54px; height: 54px; }
.avatar.small { width: 40px; height: 40px; font-size: 14px; }
.chat-row .avatar { width: 54px; height: 54px; font-size: 19px; }
.chat-row-main { min-width: 0; }
.chat-row-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 3px;
}
.chat-row-name {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-weight: 650;
}
.chat-time {
  color: var(--muted-2);
  font-size: 11px;
}
.chat-preview {
  overflow: hidden;
  margin-top: 6px;
  color: var(--muted);
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 14px;
}
.empty-list {
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 260px;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}
.empty-list strong { color: #c5d0da; }
.empty-list p { margin: 6px 0 0; font-size: 13px; }

.account-footer {
  gap: 10px;
  padding: 9px 12px;
  border-top: 1px solid var(--border);
}
.account-meta {
  min-width: 0;
  flex: 1;
}
.account-meta strong, .account-meta span {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.account-meta strong { font-size: 14px; }
.account-meta span { margin-top: 2px; color: var(--muted); font-size: 11px; }

.chat-pane {
  position: relative;
  min-width: 0;
  min-height: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(42,171,238,.045), transparent 25%),
    radial-gradient(circle at 75% 75%, rgba(42,171,238,.035), transparent 25%),
    #0e1621;
}
.chat-pane::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .11;
  background-image:
    radial-gradient(circle at 20px 20px, #8fa2b5 1px, transparent 1.5px),
    radial-gradient(circle at 55px 45px, #8fa2b5 1px, transparent 1.5px);
  background-size: 74px 68px;
}
.empty-chat {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
}
.empty-logo {
  width: 86px;
  height: 86px;
  border-radius: 50%;
  font-size: 25px;
  box-shadow: var(--shadow);
}
.empty-chat h2 { margin: 18px 0 5px; font-size: 20px; }
.empty-chat p { margin: 0; color: var(--muted); }
.active-chat {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: grid;
  grid-template-rows: 64px minmax(0,1fr) auto;
}
.chat-header {
  gap: 10px;
  padding: 7px 15px;
  border-bottom: 1px solid var(--border);
  background: rgba(23,33,43,.97);
  backdrop-filter: blur(12px);
}
.chat-title-wrap {
  min-width: 0;
  flex: 1;
}
.chat-title-wrap strong,
.chat-title-wrap span {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.chat-title-wrap strong { font-size: 15px; }
.chat-title-wrap span { margin-top: 2px; color: var(--muted); font-size: 12px; }
.chat-title-wrap span.online { color: var(--accent); }

.message-list {
  min-height: 0;
  overflow-y: auto;
  padding: 18px max(22px, calc((100% - 820px)/2)) 14px;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: #344250 transparent;
}
.message-row {
  display: flex;
  margin: 5px 0;
}
.message-row.out { justify-content: flex-end; }
.message-bubble {
  position: relative;
  max-width: min(75%, 620px);
  padding: 8px 11px 7px;
  border-radius: 12px;
  background: var(--bubble-in);
  box-shadow: 0 1px 1px rgba(0,0,0,.15);
  line-height: 1.36;
}
.message-row.out .message-bubble {
  background: var(--bubble-out);
  border-bottom-right-radius: 4px;
}
.message-row.in .message-bubble {
  border-bottom-left-radius: 4px;
}
.message-author {
  margin-bottom: 3px;
  color: #63b9e8;
  font-size: 12px;
  font-weight: 650;
}
.message-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 14px;
}
.message-meta {
  float: right;
  margin: 5px 0 -2px 10px;
  color: rgba(255,255,255,.55);
  font-size: 10px;
}
.message-attachment {
  display: block;
  min-width: 210px;
  margin-bottom: 6px;
}
.message-image {
  display: block;
  width: 100%;
  max-height: min(52vh, 520px);
  border-radius: 8px;
  object-fit: contain;
  background: rgba(0,0,0,.22);
}
.file-card {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 240px;
  padding: 8px 4px;
}
.file-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--accent);
}
.file-meta {
  min-width: 0;
  flex: 1;
}
.file-meta strong, .file-meta span {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.file-meta span { margin-top: 3px; color: rgba(255,255,255,.62); font-size: 11px; }
.file-download {
  border: 0;
  background: transparent;
  color: #7fcef5;
  cursor: pointer;
}

.composer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 8px max(14px, calc((100% - 840px)/2)) max(10px, env(safe-area-inset-bottom));
}
.composer-box {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 19px;
  background: #17212b;
  box-shadow: 0 3px 16px rgba(0,0,0,.13);
}
.composer textarea {
  width: 100%;
  max-height: 145px;
  resize: none;
  padding: 12px 14px 10px;
  border: 0;
  outline: 0;
  background: transparent;
  color: white;
  line-height: 1.4;
}
.composer-icon, .send-button {
  width: 46px;
  height: 46px;
  border-radius: 50%;
}
.composer-icon {
  background: #17212b;
  color: var(--muted);
  font-size: 20px;
}
.send-button {
  background: var(--accent);
  color: white;
  font-size: 18px;
}
.send-button:hover { background: var(--accent-hover); }

.modal {
  position: fixed;
  z-index: 80;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5,10,15,.72);
  backdrop-filter: blur(8px);
}
.modal-card {
  width: min(470px,100%);
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.modal-card header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.modal-card header > div { min-width: 0; flex: 1; }
.modal-card h2 { margin: 0; font-size: 20px; }
.modal-card header p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.modal-help { color: var(--muted); font-size: 12px; line-height: 1.45; }

.drawer-backdrop {
  position: fixed;
  z-index: 65;
  inset: 0;
  background: rgba(0,0,0,.45);
}
.settings-drawer {
  position: fixed;
  z-index: 70;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(340px, 88vw);
  padding: 16px;
  background: var(--panel);
  box-shadow: 18px 0 50px rgba(0,0,0,.35);
}
.drawer-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
}
.drawer-head > div { min-width: 0; flex: 1; }
.drawer-head strong, .drawer-head span { display: block; }
.drawer-head span { margin-top: 3px; color: var(--muted); font-size: 11px; }
.drawer-section, .drawer-note {
  margin-top: 20px;
  padding: 14px;
  border-radius: 13px;
  background: #111b25;
}
.drawer-section > span, .drawer-note strong {
  display: block;
  margin-bottom: 10px;
  color: #c9d4dd;
  font-size: 13px;
}
.drawer-languages {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.drawer-note p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.call-overlay {
  position: fixed;
  z-index: 120;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 30%, rgba(42,171,238,.22), transparent 35%),
    #071019;
}
.remote-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #05090d;
  visibility: hidden;
}
.call-backdrop-avatar {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 150px;
  height: 150px;
  transform: translate(-50%,-50%);
  border-radius: 50%;
  background: linear-gradient(145deg,#37aeea,#2784bd);
  box-shadow: 0 20px 65px rgba(0,0,0,.45);
  font-size: 52px;
  font-weight: 700;
}
.call-top {
  position: absolute;
  z-index: 3;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: max(14px, env(safe-area-inset-top)) 18px 14px;
  background: linear-gradient(to bottom,rgba(0,0,0,.52),transparent);
}
.call-peer {
  min-width: 0;
  flex: 1;
  text-align: center;
}
.call-peer strong, .call-peer span { display: block; }
.call-peer span { margin-top: 3px; color: rgba(255,255,255,.72); font-size: 12px; }
.call-route {
  min-width: 92px;
  color: rgba(255,255,255,.72);
  text-align: right;
  font-size: 11px;
}
.call-ghost { background: rgba(0,0,0,.22); color: white; }
.local-video-frame {
  position: absolute;
  z-index: 4;
  right: 18px;
  bottom: 112px;
  width: min(20vw,210px);
  aspect-ratio: 3/4;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 17px;
  background: #17212b;
  box-shadow: var(--shadow);
}
.local-video-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}
.call-controls, .incoming-actions {
  position: absolute;
  z-index: 5;
  left: 50%;
  bottom: max(22px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  padding: 10px;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 26px;
  background: rgba(15,23,31,.75);
  backdrop-filter: blur(15px);
}
.incoming-actions { gap: 68px; background: transparent; border: 0; }
.call-control, .call-action {
  width: 54px;
  height: 54px;
  border: 0;
  border-radius: 50%;
  background: rgba(255,255,255,.12);
  color: white;
  cursor: pointer;
  font-size: 20px;
}
.call-control.off { background: #87424a; }
.call-control.danger, .call-action.danger { background: var(--red); }
.call-action.accept { background: var(--green); }
.call-action { width: 64px; height: 64px; font-size: 23px; }
.call-control.hangup { transform: rotate(135deg); }

.toast {
  position: fixed;
  z-index: 200;
  left: 50%;
  bottom: 88px;
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(0,0,0,.82);
  color: white;
  box-shadow: var(--shadow);
  font-size: 13px;
}

@media (max-width: 760px) {
  :root { --sidebar-width: 100vw; }
  .messenger { display: block; position: relative; }
  .sidebar {
    position: absolute;
    z-index: 5;
    inset: 0;
    width: 100%;
    border-right: 0;
  }
  .chat-pane {
    position: absolute;
    z-index: 10;
    inset: 0;
    transform: translateX(100%);
    transition: transform .18s ease-out;
  }
  .messenger.chat-open .chat-pane { transform: translateX(0); }
  .mobile-only { display: grid !important; }
  .chat-header { padding: 6px 8px; }
  .message-list { padding: 13px 10px; }
  .message-bubble { max-width: 86%; }
  .composer { padding: 7px 8px max(8px, env(safe-area-inset-bottom)); }
  .composer-icon, .send-button { width: 44px; height: 44px; }
  .local-video-frame {
    right: 12px;
    bottom: 100px;
    width: 31vw;
    min-width: 105px;
    max-width: 145px;
  }
  .call-controls { gap: 7px; }
  .call-control { width: 49px; height: 49px; }
  .desktop-share { display: none; }
  .call-route { min-width: 64px; max-width: 85px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}

@media (max-width: 390px) {
  .auth-card { padding: 25px 20px; }
  .brand-small span { display: none; }
  .call-controls { width: calc(100vw - 18px); justify-content: space-around; }
}