/* Exam Studio, in colour.
   The chosen subject's hue (--subj, set by exam-cover.js on .es-main) runs through
   the form and the paper, so picking Chemistry turns the page teal. The right side
   shows the paper's front page before it exists, then the paper itself.
   Rules start with :root[data-theme] to outrank student-mono.css. */

:root[data-theme] .es-main { --subj: var(--hue-blue); }
/* The automatic dark rules paint this panel grey; the page ground shows through instead. */
:root[data-theme] .es-main .es-paper-panel { background: transparent !important; }
:root[data-theme] #exam-paper-rendered.es-paper { background: var(--ag-bg) !important; }

/* ---- The form ------------------------------------------------------------ */
:root[data-theme] .es-step-label { display: flex !important; align-items: center; gap: 8px; }
:root[data-theme] .es-step {
  display: inline-grid; place-items: center; width: 20px; height: 20px; flex: none; border-radius: 50%;
  background: var(--c); color: #ffffff; font: 600 11px/1 var(--ag-font); letter-spacing: 0;
}
:root[data-theme] #badge-board-code {
  border-color: color-mix(in srgb, var(--subj) 40%, transparent) !important;
  background: color-mix(in srgb, var(--subj) 10%, var(--ag-bg)) !important;
  color: var(--ag-text) !important; transition: background-color 0.3s ease, border-color 0.3s ease;
}
:root[data-theme] .es-form-panel .ag-select:focus, :root[data-theme] .es-form-panel .ag-input:focus { border-color: var(--subj) !important; }
:root[data-theme] .es-switch-input:checked + .es-switch { background: var(--subj) !important; }
:root[data-theme] .es-switch-input:checked + .es-switch::after { background: #ffffff !important; }
:root[data-theme] .es-format-card .es-badge-lg { background: color-mix(in srgb, var(--subj) 9%, var(--ag-bg)) !important; border-color: color-mix(in srgb, var(--subj) 30%, var(--ag-hairline)) !important; }
:root[data-theme] #generate-btn { gap: 10px; }
:root[data-theme] #generate-btn .aria-logo { margin-left: -6px; }
:root[data-theme] #generate-btn:not(:disabled):hover { transform: translateY(-1px); }

/* Status under the button */
:root[data-theme] .es-status.is-busy { background: color-mix(in srgb, var(--hue-blue) 9%, var(--ag-bg)) !important; border-color: color-mix(in srgb, var(--hue-blue) 30%, var(--ag-hairline)) !important; }
:root[data-theme] .es-status.is-ok { background: color-mix(in srgb, var(--hue-green) 10%, var(--ag-bg)) !important; border-color: color-mix(in srgb, var(--hue-green) 35%, var(--ag-hairline)) !important; }
:root[data-theme] .es-status.is-bad { background: color-mix(in srgb, var(--hue-red) 9%, var(--ag-bg)) !important; border-color: color-mix(in srgb, var(--hue-red) 35%, var(--ag-hairline)) !important; }

/* Wide screens show the front page, so the format card only appears on phones;
   phones skip the front page, which would sit below the button. */
@media (min-width: 768px) { :root[data-theme] .es-format-card { display: none !important; } }
@media (max-width: 767px) {
  :root[data-theme] #exam-empty-state { display: none !important; }
  :root[data-theme] .es-paper-panel:has(#exam-empty-state:not(.hidden)) { display: none !important; }
}
/* Nothing to print or copy until there is a paper. */
:root[data-theme] .es-paper-panel:has(#exam-empty-state:not(.hidden)) .es-paper-head { display: none !important; }

/* ---- The front page ------------------------------------------------------ */
:root[data-theme] .es-cover-wrap { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 8px 18px 24px 8px; }
:root[data-theme] .es-cover {
  position: relative; max-width: 620px; margin: 0 auto; padding: 34px 38px 30px;
  border: 1px solid var(--ag-hairline); border-top: 8px solid var(--subj); border-radius: 18px;
  background: var(--ag-bg); color: var(--ag-text);
  transition: border-color 0.4s ease;
}
/* A second sheet peeking out underneath, like a stapled paper. */
:root[data-theme] .es-cover::before {
  content: ""; position: absolute; inset: 10px -8px -8px 8px; z-index: -1;
  border: 1px solid var(--ag-hairline); border-radius: 18px; background: var(--mono-soft);
  transform: rotate(1.4deg);
}
:root[data-theme] .es-cover-wrap { position: relative; isolation: isolate; }
:root[data-theme] .es-cover-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
:root[data-theme] .es-cover-tag {
  padding: 5px 12px; border-radius: 999px; font: 500 11px var(--mono-code); letter-spacing: 0.12em; text-transform: uppercase;
  background: color-mix(in srgb, var(--subj) 12%, var(--ag-bg)); color: var(--ag-text);
}
:root[data-theme] .es-cover-emoji {
  display: grid; place-items: center; width: 56px; height: 56px; border-radius: 17px; font-size: 30px; line-height: 1;
  background: color-mix(in srgb, var(--subj) 14%, var(--ag-bg));
}
:root[data-theme] .es-cover-board { margin: 26px 0 0; font: 500 12px/1.4 var(--mono-code); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ag-text-3); }
:root[data-theme] .es-cover-subject { margin: 6px 0 0; font: 400 clamp(44px, 5vw, 60px)/1 var(--mono-serif); letter-spacing: -0.01em; color: var(--ag-text); text-wrap: balance; }
:root[data-theme] .es-cover-code { margin: 10px 0 0; font: 500 14px var(--mono-code); color: var(--ag-text); }
:root[data-theme] .es-cover-paper { margin: 4px 0 0; font-size: 16px; line-height: 1.45; color: var(--ag-text-2); }
:root[data-theme] .es-cover-facts {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 24px 0 0;
  border-top: 1px solid var(--ag-hairline-strong); border-bottom: 1px solid var(--ag-hairline-strong);
}
:root[data-theme] .es-cover-facts > div { padding: 14px 14px 14px 0; }
:root[data-theme] .es-cover-facts > div + div { padding-left: 14px; border-left: 1px solid var(--ag-hairline); }
:root[data-theme] .es-cover-facts dt { font: 500 10.5px var(--mono-code); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ag-text-3); }
:root[data-theme] .es-cover-facts dd { margin: 4px 0 0; font: 600 15px/1.3 var(--ag-font); font-variant-numeric: tabular-nums; color: var(--ag-text); }
:root[data-theme] .es-cover-label { margin: 22px 0 8px; font: 500 10.5px var(--mono-code); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ag-text-3); }
:root[data-theme] .es-cover-topics { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
:root[data-theme] .es-cover-topics li {
  padding: 6px 12px; border-radius: 999px; font-size: 13.5px; line-height: 1.3;
  background: color-mix(in srgb, var(--subj) 9%, var(--ag-bg)); border: 1px solid color-mix(in srgb, var(--subj) 22%, var(--ag-hairline));
}
:root[data-theme] .es-cover-rules { margin: 0; padding-left: 18px; list-style: disc; font-size: 14px; line-height: 1.55; color: var(--ag-text-2); }
:root[data-theme] .es-cover-rules li + li { margin-top: 4px; }
:root[data-theme] .es-cover-rules li::marker { color: var(--subj); }
:root[data-theme] .es-cover-foot { margin: 22px 0 0; padding-top: 14px; border-top: 1px dashed var(--ag-hairline-strong); font-size: 12.5px; line-height: 1.5; color: var(--ag-text-3); }
/* A new subject or paper settles in. */
:root[data-theme] .es-cover.is-changing :is(.es-cover-emoji, .es-cover-board, .es-cover-subject, .es-cover-code, .es-cover-paper, .es-cover-facts, .es-cover-topics) { animation: es-settle 0.5s var(--aria-ease) both; }
:root[data-theme] .es-cover.is-changing .es-cover-subject { animation-delay: 40ms; }
:root[data-theme] .es-cover.is-changing :is(.es-cover-code, .es-cover-paper) { animation-delay: 80ms; }
:root[data-theme] .es-cover.is-changing :is(.es-cover-facts, .es-cover-topics) { animation-delay: 120ms; }
:root[data-theme] .es-cover.is-changing .es-cover-emoji { animation: es-pop 0.55s var(--aria-spring) both; }
@keyframes es-settle { from { opacity: 0.001; transform: translateY(8px); } }
@keyframes es-pop { from { transform: scale(0.6) rotate(-12deg); } }

/* ---- While ARIA writes --------------------------------------------------- */
:root[data-theme] #exam-paper-rendered .es-writing { display: flex; flex-direction: column; align-items: center; gap: 10px; max-width: 460px; margin: 0 auto; padding: 36px 8px 24px; text-align: center; }
:root[data-theme] #exam-paper-rendered .es-writing h3 { margin: 10px 0 0; padding: 0; border: 0; font: 400 34px/1.1 var(--mono-serif); color: var(--ag-text); text-wrap: balance; }
:root[data-theme] #exam-paper-rendered .es-writing > p { margin: 0; font-size: 14.5px; line-height: 1.55; color: var(--ag-text-2); }
:root[data-theme] #exam-paper-rendered .es-writing-bar { position: relative; width: 220px; height: 6px; margin: 10px 0 6px; overflow: hidden; border-radius: 99px; background: color-mix(in srgb, var(--subj) 15%, var(--ag-bg)); }
:root[data-theme] #exam-paper-rendered .es-writing-bar i { position: absolute; top: 0; bottom: 0; width: 40%; border-radius: inherit; background: var(--subj); animation: es-slide 1.4s var(--aria-ease) infinite; }
@keyframes es-slide { from { left: -40%; } to { left: 100%; } }
:root[data-theme] #exam-paper-rendered .es-games { width: 100%; max-width: 340px; margin-top: 18px; padding: 16px; border: 1px solid var(--ag-hairline); border-radius: 22px; background: var(--mono-soft); }
:root[data-theme] #exam-paper-rendered .es-games-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
:root[data-theme] #exam-paper-rendered .es-games-head h4 { margin: 0; font: 600 14px var(--ag-font); color: var(--ag-text); }
:root[data-theme] #exam-paper-rendered .es-game-tabs { display: flex; gap: 4px; padding: 3px; border-radius: 999px; background: var(--ag-bg); border: 1px solid var(--ag-hairline); }
:root[data-theme] #exam-paper-rendered .es-game-tab { min-height: 30px; padding: 0 12px; white-space: nowrap; border: 0; border-radius: 999px; background: none; color: var(--ag-text-3); font: 500 12.5px var(--ag-font); cursor: pointer; }
:root[data-theme] #exam-paper-rendered .es-game-tab.is-on { background: var(--mono-inv); color: var(--mono-on-inv); }
@media (hover: none) { :root[data-theme] #exam-paper-rendered .es-keys-only { display: none; } }
:root[data-theme] #exam-paper-rendered .es-ttt { display: grid; grid-template-columns: repeat(3, 60px); gap: 8px; justify-content: center; }
:root[data-theme] #exam-paper-rendered .es-ttt-cell {
  width: 60px; height: 60px; border: 1px solid var(--ag-hairline); border-radius: 16px; background: var(--ag-bg);
  font: 700 26px/1 var(--ag-font); color: var(--ag-text); cursor: pointer; transition: transform 0.2s var(--aria-ease), background-color 0.2s ease;
}
:root[data-theme] #exam-paper-rendered .es-ttt-cell:hover:empty { background: color-mix(in srgb, var(--hue-blue) 8%, var(--ag-bg)); }
:root[data-theme] #exam-paper-rendered .es-ttt-cell.is-x { color: var(--aria-blue); animation: es-pop 0.35s var(--aria-spring) both; }
:root[data-theme] #exam-paper-rendered .es-ttt-cell.is-o { color: var(--aria-coral); animation: es-pop 0.35s var(--aria-spring) both; }
:root[data-theme] #exam-paper-rendered .es-game-status { margin: 12px 0 0; font: 600 13px var(--ag-font); color: var(--ag-text-2); }
:root[data-theme] #exam-paper-rendered .es-game-status.is-win { color: var(--hue-green); }
:root[data-theme] #exam-paper-rendered .es-game-status.is-lose { color: var(--aria-coral); }
:root[data-theme] #exam-paper-rendered .es-snake { display: block; margin: 0 auto; border-radius: 14px; background: var(--ag-bg); border: 1px solid var(--ag-hairline); }
:root[data-theme] #exam-paper-rendered .es-snake-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
:root[data-theme] #exam-paper-rendered .es-snake-foot .es-game-status { margin-top: 10px; }
:root[data-theme] #exam-paper-rendered .es-game-score { margin: 10px 0 0; font: 500 12.5px var(--mono-code); color: var(--ag-text-2); }
:root[data-theme] #exam-paper-rendered .es-game-hint { margin: 6px 0 0; font-size: 12px; color: var(--ag-text-3); }

/* ---- When it didn't work ------------------------------------------------- */
:root[data-theme] #exam-paper-rendered .es-failed { display: flex; flex-direction: column; align-items: center; gap: 10px; max-width: 420px; margin: 0 auto; padding: 56px 8px; text-align: center; }
:root[data-theme] #exam-paper-rendered .es-failed > .material-symbols-outlined { font-size: 40px; color: var(--hue-red); }
:root[data-theme] #exam-paper-rendered .es-failed h3 { margin: 0; padding: 0; border: 0; font: 400 30px/1.1 var(--mono-serif); color: var(--ag-text); }
:root[data-theme] #exam-paper-rendered .es-failed p { margin: 0 0 8px; font-size: 14.5px; line-height: 1.55; color: var(--ag-text-2); }

/* ---- The finished paper -------------------------------------------------- */
:root[data-theme] .es-paper {
  max-width: 860px; width: 100%; margin: 0 auto; background: var(--ag-bg) !important; color: var(--ag-text) !important;
  border: 1px solid var(--ag-hairline) !important; border-top: 8px solid var(--subj) !important; border-radius: 18px !important; box-shadow: none !important;
  animation: aria-rise 0.6s var(--aria-ease) both;
}
:root[data-theme] #exam-paper-rendered h1 { font: 400 34px/1.1 var(--mono-serif) !important; letter-spacing: -0.01em !important; }
:root[data-theme] #exam-paper-rendered h2 { font: 400 26px/1.15 var(--mono-serif) !important; color: var(--ag-text) !important; }
:root[data-theme] #exam-paper-rendered h2::before { content: ""; display: inline-block; width: 10px; height: 10px; margin: 0 10px 3px 0; border-radius: 3px; background: var(--subj); vertical-align: middle; }
:root[data-theme] #exam-paper-rendered blockquote { border-left-color: var(--subj) !important; background: color-mix(in srgb, var(--subj) 7%, var(--ag-bg)) !important; }
:root[data-theme] #exam-paper-rendered code { color: var(--ag-text) !important; }
:root[data-theme] #exam-paper-rendered hr { border-top-color: color-mix(in srgb, var(--subj) 45%, var(--ag-hairline)) !important; }
:root[data-theme] .es-paper .mermaid, :root[data-theme] .es-paper .exam-diagram-card { background: var(--ag-bg) !important; }
/* Print stays a plain black-on-white sheet. */
@media print { :root[data-theme] .es-paper { border: 0 !important; animation: none !important; } :root[data-theme] #exam-paper-rendered h2::before { display: none; } }

@media (prefers-reduced-motion: reduce) {
  :root[data-theme] .es-cover.is-changing *, :root[data-theme] #exam-paper-rendered .es-writing-bar i, :root[data-theme] #exam-paper-rendered .es-ttt-cell, :root[data-theme] .es-paper { animation: none !important; }
}