/* Keep the Live Board chessboard palette identical to the main app. */
:root {
  --light-square: #eee3cb;
  --dark-square: #71925a;
}

html[data-theme="dark"] {
  --light-square: #f1e3c6;
  --dark-square: #6f8f72;
}

html,
body,
button,
a,
input,
select,
textarea,
label,
p,
h1,
h2,
strong,
span,
li,
time {
  font-family: Arial, Helvetica, sans-serif !important;
  font-style: normal !important;
  font-synthesis: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

.session-messages {
  display: grid;
  gap: 0.75rem;
}

.session-message-heading,
.session-message-actions,
.session-message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.session-message-heading h2 {
  margin: 0.12rem 0 0;
  font-size: 1rem;
}

.compact-button {
  padding: 0.45rem 0.7rem;
  min-height: auto;
}

.session-message-list {
  display: grid;
  gap: 0.55rem;
  max-height: 18rem;
  overflow-y: auto;
  padding-right: 0.15rem;
}

.session-message,
.session-message-empty {
  margin: 0;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: color-mix(in srgb, var(--card) 92%, var(--accent) 8%);
}

.session-message.student {
  background: color-mix(in srgb, var(--card) 94%, var(--muted) 6%);
}

.session-message-meta {
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  color: var(--muted-text);
}

.session-message p {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.45;
}

.session-message a {
  display: inline-block;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.session-message-form {
  display: grid;
  gap: 0.45rem;
}

.session-message-form textarea {
  width: 100%;
  resize: vertical;
  min-height: 4.6rem;
}

.session-message-actions .message {
  margin: 0;
  font-size: 0.78rem;
}

@media (min-width: 841px) {
  .live-board-layout {
    grid-template-columns: minmax(0, 660px) minmax(280px, 350px);
    justify-content: center;
  }

  .board-card {
    padding-left: 0;
    padding-right: 0;
    border-radius: 0;
  }

  .board-card-head,
  .board-toolbar,
  .student-lock-message {
    margin-left: 1.25rem;
    margin-right: 1.25rem;
  }

  .board-frame {
    width: min(100%, 620px, calc(100vh - 250px));
    margin-left: auto;
    margin-right: auto;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .chess-board {
    border-radius: 0;
  }

  html[data-role="student"] .live-board-layout {
    grid-template-columns: minmax(0, 560px) minmax(260px, 320px);
    gap: 0.9rem;
  }

  html[data-role="student"] .board-frame,
  html[data-role="student"] .student-lock-message {
    width: min(100%, 520px, calc(100vh - 240px));
  }

  html[data-role="student"] .side-card {
    width: min(100%, 320px);
  }
}

@media (min-width: 1180px) and (max-height: 820px) {
  .live-board-shell {
    padding-top: 0.75rem;
  }

  .live-board-header,
  .session-bar {
    margin-bottom: 0.65rem;
  }

  .board-frame {
    width: min(100%, 560px, calc(100vh - 210px));
  }

  html[data-role="student"] .board-frame,
  html[data-role="student"] .student-lock-message {
    width: min(100%, 500px, calc(100vh - 220px));
  }

  .session-message-list {
    max-height: 12rem;
  }
}

/* Keep the student board visually consistent when a phone or tablet rotates. */
@media (max-width: 840px) {
  html[data-role="student"] .live-board-shell {
    width: 100%;
    padding-left: 0;
    padding-right: 0;
  }

  html[data-role="student"] .live-board-header,
  html[data-role="student"] .session-bar {
    margin-left: 0.8rem;
    margin-right: 0.8rem;
  }

  html[data-role="student"] .live-board-layout {
    gap: 0;
  }

  html[data-role="student"] .board-card,
  html[data-role="student"] .side-card {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }

  html[data-role="student"] .board-card {
    padding: 0.7rem 0 0;
  }

  html[data-role="student"] .board-card-head {
    padding-left: 0.8rem;
    padding-right: 0.8rem;
  }

  html[data-role="student"] .board-frame {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
  }

  html[data-role="student"] .chess-board {
    border-radius: 0;
  }

  html[data-role="student"] .student-lock-message {
    width: calc(100% - 1.6rem);
    margin-left: 0.8rem;
    margin-right: 0.8rem;
  }

  html[data-role="student"] .side-card {
    width: 100%;
    margin-top: 1rem;
  }
}

@media (hover: none) and (pointer: coarse) {
  html[data-role="student"] .board-frame,
  html[data-role="student"] .chess-board {
    border-radius: 0;
  }

  html[data-role="student"] .board-frame {
    padding: 0;
    box-shadow: none;
  }
}