:root {
  --footer-space: 190px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --top-controls-space: 0px;
  --bg-top: #0b1224;
  --bg-bottom: #151d34;
  --card: rgba(13, 23, 45, 0.62);
  --card-strong: rgba(21, 31, 58, 0.9);
  --line: rgba(201, 223, 255, 0.14);
  --text: #f6f8ff;
  --muted: #b8c4dd;
  --muted-strong: #94a7cb;
  --blue: #2f8dff;
  --blue-strong: #95c3ff;
  --shadow: rgba(3, 8, 22, 0.56);
  --scroll-track: rgba(255, 255, 255, 0.05);
  --scroll-thumb: rgba(146, 176, 224, 0.46);
  --scroll-thumb-hover: rgba(173, 203, 248, 0.68);
}

:root[data-theme="light"] {
  --bg-top: #d7e7ff;
  --bg-bottom: #eef4ff;
  --card: rgba(255, 255, 255, 0.72);
  --card-strong: rgba(255, 255, 255, 0.92);
  --line: rgba(67, 98, 146, 0.18);
  --text: #10223f;
  --muted: #4f678b;
  --muted-strong: #3b5680;
  --blue: #1674f3;
  --blue-strong: #0d59c0;
  --shadow: rgba(35, 72, 118, 0.14);
  --scroll-track: rgba(57, 86, 126, 0.10);
  --scroll-thumb: rgba(57, 102, 168, 0.38);
  --scroll-thumb-hover: rgba(41, 85, 146, 0.56);
}

* {
  box-sizing: border-box;
}

html {
  background: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  overscroll-behavior-y: none;
}

body {
  margin: 0;
  min-height: 100svh;
  min-height: 100dvh;
  background-color: var(--bg-top);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  font-family: "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  overscroll-behavior-y: none;
  transition: background 360ms ease, color 360ms ease;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 16% 0%, rgba(84, 155, 255, 0.34), transparent 40%),
    radial-gradient(circle at 86% 5%, rgba(49, 232, 217, 0.2), transparent 34%),
    radial-gradient(circle at 62% 100%, rgba(70, 110, 255, 0.24), transparent 44%);
}

.app-shell {
  position: relative;
  z-index: 1;
  flex: 1;
  display: grid;
  place-items: center;
  padding:
    calc(24px + var(--top-controls-space) + var(--safe-top))
    calc(24px + var(--safe-right))
    calc(16px + var(--safe-bottom))
    calc(24px + var(--safe-left));
  overflow: hidden;
}

.card {
  width: min(980px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 22px 54px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  padding: 24px;
  animation: rise 240ms ease-out;
  transition: background-color 360ms ease, border-color 360ms ease, box-shadow 360ms ease;
}

.room-card {
  height: min(760px, calc(100dvh - var(--footer-space) - var(--top-controls-space) - var(--safe-top)));
  display: flex;
  flex-direction: column;
}

.top-controls {
  position: fixed;
  top: calc(12px + var(--safe-top));
  right: calc(12px + var(--safe-right));
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--card-strong) 75%, transparent);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--shadow) 70%, transparent);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}

.theme-toggle {
  position: static;
  min-width: 76px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: 999px;
  padding: 4px;
  background: color-mix(in srgb, var(--card) 68%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}

.lang-btn {
  min-width: 44px;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.lang-btn.active {
  color: #ffffff;
  background: linear-gradient(180deg, #53a2ff, var(--blue));
  border-color: color-mix(in srgb, var(--blue) 58%, transparent);
  box-shadow: 0 8px 16px color-mix(in srgb, var(--blue) 32%, transparent);
}

.join-card {
  width: min(520px, 100%);
}

h1,
h2,
h3 {
  margin: 0 0 8px;
  letter-spacing: -0.015em;
}

p {
  margin: 0 0 12px;
  color: var(--muted);
}

.small {
  font-size: 0.86rem;
  margin-top: 8px;
}

.panel-note {
  margin-bottom: 10px;
  color: var(--muted-strong);
}

.join-form,
.chat-form {
  display: grid;
  gap: 12px;
}

label,
.field-group {
  display: grid;
  gap: 8px;
  font-size: 0.92rem;
}

.field-label {
  font-size: 0.92rem;
}

input,
button {
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 11px 12px;
  font: inherit;
  transition: background-color 260ms ease, border-color 260ms ease, color 260ms ease, box-shadow 220ms ease, transform 220ms ease;
}

input {
  color: var(--text);
  background: color-mix(in srgb, var(--card-strong) 82%, transparent);
}

input::placeholder {
  color: color-mix(in srgb, var(--muted) 85%, #ffffff 15%);
}

button {
  cursor: pointer;
  background: linear-gradient(180deg, #3b9bff, var(--blue));
  color: #fff;
  font-weight: 700;
  border-color: rgba(0, 88, 195, 0.35);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(10, 132, 255, 0.28);
}

button:active {
  transform: translateY(0);
}

button.ghost {
  background: var(--card-strong);
  color: var(--blue-strong);
  border-color: rgba(10, 132, 255, 0.28);
}

.name-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
}

.avatar-join {
  width: 34px;
  height: 34px;
}

.small-btn {
  padding: 8px 10px;
  font-size: 0.82rem;
}

.room-choices {
  display: grid;
  gap: 9px;
  max-height: 234px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 2px;
  scroll-padding-block: 12px;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) var(--scroll-track);
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0,
    #000 14px,
    #000 calc(100% - 14px),
    transparent 100%
  );
  mask-image: linear-gradient(
    to bottom,
    transparent 0,
    #000 14px,
    #000 calc(100% - 14px),
    transparent 100%
  );
}

.room-choices::-webkit-scrollbar {
  width: 9px;
}

.room-choices::-webkit-scrollbar-track {
  background: var(--scroll-track);
  border-radius: 10px;
  margin-block: 10px;
}

.room-choices::-webkit-scrollbar-thumb {
  background: linear-gradient(
    180deg,
    var(--scroll-thumb),
    color-mix(in srgb, var(--scroll-thumb) 75%, #000000 25%)
  );
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.room-choices::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    180deg,
    var(--scroll-thumb-hover),
    color-mix(in srgb, var(--scroll-thumb-hover) 70%, #000000 30%)
  );
  background-clip: content-box;
}

.room-choices::-webkit-scrollbar-thumb:active {
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--scroll-thumb-hover) 85%, #ffffff 15%),
    color-mix(in srgb, var(--scroll-thumb-hover) 65%, #000000 35%)
  );
  background-clip: content-box;
}

.room-choice {
  width: 100%;
  text-align: left;
  background: color-mix(in srgb, var(--card-strong) 80%, transparent);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 14px;
  padding: 11px 12px;
  display: grid;
  gap: 4px;
  min-height: 88px;
}

.room-choice strong {
  font-size: 0.95rem;
}

.room-choice-stats {
  color: var(--muted-strong);
  font-size: 0.79rem;
  letter-spacing: 0.01em;
}

.room-choice-desc {
  color: var(--muted);
  font-size: 0.82rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.room-choice.active {
  border-color: rgba(10, 132, 255, 0.45);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--blue) 24%, var(--card) 76%),
    color-mix(in srgb, var(--blue) 10%, var(--card) 90%)
  );
}

.hidden {
  display: none;
}

.room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.room-stats-line {
  font-size: 0.84rem;
  margin-bottom: 4px;
  color: var(--muted-strong);
}

.layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 16px;
  flex: 1;
  min-height: 0;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  background: color-mix(in srgb, var(--card-strong) 68%, transparent);
  min-height: 0;
  display: flex;
  flex-direction: column;
  transition: background-color 320ms ease, border-color 320ms ease;
}

#participantsList {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-auto-rows: min-content;
  gap: 10px;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: auto;
  overscroll-behavior-y: contain;
  scroll-padding-block: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) var(--scroll-track);
}

#participantsList::-webkit-scrollbar {
  width: 9px;
}

#participantsList::-webkit-scrollbar-track {
  background: var(--scroll-track);
  border-radius: 10px;
  margin-block: 8px;
}

#participantsList::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: 10px;
  border: 2px solid var(--scroll-track);
}

#participantsList::-webkit-scrollbar-thumb:hover {
  background: var(--scroll-thumb-hover);
}

.participant {
  display: grid;
  gap: 10px;
  padding: 10px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card-strong) 78%, transparent);
  transition: background-color 260ms ease, border-color 260ms ease;
}

.participant-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
}

.name-with-avatar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.avatar {
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--line) 70%, #ffffff 30%);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--blue) 25%, transparent);
  background: color-mix(in srgb, var(--card-strong) 70%, transparent);
  transition: box-shadow 220ms ease, border-color 220ms ease, transform 220ms ease;
}

.avatar.speaking {
  border-color: color-mix(in srgb, var(--blue) 72%, #ffffff 28%);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--blue) 20%, transparent),
    0 0 14px color-mix(in srgb, var(--blue) 38%, transparent);
  transform: scale(1.04);
}

.avatar-participant {
  width: 26px;
  height: 26px;
}

.avatar-message {
  width: 20px;
  height: 20px;
}

.participant strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.participant-state {
  flex-shrink: 0;
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 0.72rem;
  color: var(--blue-strong);
  background: color-mix(in srgb, var(--blue) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--blue) 30%, transparent);
}

.participant-state.is-muted {
  color: var(--muted);
  background: color-mix(in srgb, var(--muted) 14%, transparent);
  border-color: color-mix(in srgb, var(--muted) 30%, transparent);
}

.participant button {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: "SF Pro Text", "Helvetica Neue", "Segoe UI", sans-serif;
}

.participant-controls {
  display: grid;
  gap: 6px;
}

.participant-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.volume-wrap {
  display: grid;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--muted);
  width: 100%;
}

.volume-slider {
  width: 100%;
  accent-color: var(--blue);
  padding: 0;
}

.messages {
  border: 1px solid var(--line);
  border-radius: 14px;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: auto;
  overscroll-behavior-y: contain;
  padding: 12px;
  scroll-padding-block: 12px;
  margin-bottom: 12px;
  display: grid;
  gap: 8px;
  background: color-mix(in srgb, var(--card-strong) 66%, transparent);
}

.messages {
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) var(--scroll-track);
}

.messages::-webkit-scrollbar {
  width: 9px;
}

.messages::-webkit-scrollbar-track {
  background: var(--scroll-track);
  border-radius: 10px;
  margin-block: 10px;
}

.messages::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--scroll-thumb), color-mix(in srgb, var(--scroll-thumb) 75%, #000000 25%));
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.messages::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    180deg,
    var(--scroll-thumb-hover),
    color-mix(in srgb, var(--scroll-thumb-hover) 70%, #000000 30%)
  );
  background-clip: content-box;
}

.messages::-webkit-scrollbar-thumb:active {
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--scroll-thumb-hover) 85%, #ffffff 15%),
    color-mix(in srgb, var(--scroll-thumb-hover) 65%, #000000 35%)
  );
  background-clip: content-box;
}

.meta-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 3px;
}

.chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.message {
  font-size: 0.94rem;
  line-height: 1.35;
  display: grid;
  gap: 4px;
  word-break: break-word;
  overflow-wrap: break-word;
  word-wrap: break-word;
  min-width: 0;
  max-width: 100%;
  padding: 8px 10px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card-strong) 72%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  transition: background-color 280ms ease, border-color 280ms ease;
}

.message > div:last-child {
  word-break: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
  max-width: min(100%, 72ch);
}

.message .meta {
  color: color-mix(in srgb, var(--blue) 85%, #ffffff 15%);
  font-size: 0.8rem;
}

.app-footer {
  position: relative;
  z-index: 1;
  padding:
    6px
    calc(12px + var(--safe-right))
    calc(7px + var(--safe-bottom))
    calc(12px + var(--safe-left));
  color: var(--muted);
  flex-shrink: 0;
  border-top: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  background: color-mix(in srgb, var(--card) 55%, transparent);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
}

.footer-mini {
  width: min(980px, 100%);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  align-items: center;
  font-size: 0.72rem;
  color: var(--muted-strong);
}

.audio-rack {
  display: none;
}

@keyframes rise {
  from {
    transform: translateY(8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 820px) {
  :root {
    --footer-space: 236px;
    --top-controls-space: 8px;
  }

  body {
    overflow: auto;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .room-choices,
  .messages {
    -webkit-mask-image: none;
    mask-image: none;
  }

  .card {
    padding: 16px;
    border-radius: 20px;
  }

  .room-card {
    height: auto;
    min-height: calc(100dvh - 178px - var(--safe-top) - var(--safe-bottom));
  }

  .messages {
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
    height: clamp(165px, 26vh, 220px);
  }

  .app-shell {
    place-items: start center;
    overflow: auto;
    padding:
      calc(4px + var(--safe-top))
      calc(12px + var(--safe-right))
      calc(8px + var(--safe-bottom))
      calc(12px + var(--safe-left));
  }

  .theme-toggle {
    min-width: 70px;
  }

  .top-controls {
    position: sticky;
    top: calc(2px + var(--safe-top));
    right: auto;
    left: auto;
    margin-bottom: 6px;
    width: auto;
    justify-content: space-between;
  }

  .footer-mini {
    justify-content: flex-start;
    font-size: 0.68rem;
  }

  .participant-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .participant-actions {
    width: 100%;
  }

}

/* iPhone 13 Pro and similar widths/heights */
@media (max-width: 430px) and (min-height: 760px) {
  :root {
    --top-controls-space: 8px;
  }

  .top-controls {
    border-radius: 20px;
    padding: 7px;
  }

  .lang-btn {
    min-width: 42px;
    padding: 7px 10px;
  }

  .theme-toggle {
    min-width: 66px;
  }

  .room-card {
    min-height: calc(100dvh - 188px - var(--safe-top) - var(--safe-bottom));
  }
}