:root {
  --bg: var(--tg-theme-bg-color, #f4f6f8);
  --text: var(--tg-theme-text-color, #17202a);
  --hint: var(--tg-theme-hint-color, #667085);
  --card: var(--tg-theme-secondary-bg-color, #ffffff);
  --button: var(--tg-theme-button-color, #3457d5);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: Inter, system-ui, sans-serif;
  background: var(--bg); color: var(--text);
}
.container { max-width: 680px; margin: auto; padding: 20px; }
header { display:flex; justify-content:space-between; align-items:center; margin-bottom:24px; }
h1,h2,h3,p { margin-top:0; }
.eyebrow { font-size:11px; letter-spacing:2px; color:var(--hint); margin-bottom:4px; }
.hero,.question-card,.result-card,.test-card {
  background:var(--card); border-radius:22px; padding:22px;
  box-shadow:0 8px 25px rgba(0,0,0,.06);
}
.hero { margin-bottom:24px; }
.test-list { display:grid; gap:14px; }
.test-card { display:flex; justify-content:space-between; align-items:center; }
.test-card p { color:var(--hint); margin-bottom:0; }
button {
  border:0; border-radius:14px; padding:13px 18px;
  background:var(--button); color:var(--button-text);
  font-size:15px; font-weight:700; cursor:pointer;
}
.secondary { background:var(--card); color:var(--text); }
.link-btn { padding:0; background:transparent; color:var(--button); }
.exam-top,.nav-row { display:flex; justify-content:space-between; align-items:center; }
.nav-row { margin-top:18px; }
.badge {
  display:inline-block; padding:6px 10px; border-radius:999px;
  background:rgba(52,87,213,.12); color:var(--button); margin-bottom:14px;
}
.choice {
  display:block; width:100%; text-align:left; margin-top:10px;
  background:var(--bg); color:var(--text); border:2px solid transparent;
}
.choice.selected { border-color:var(--button); }
#question-image { width:100%; border-radius:14px; margin:12px 0; }
#question-audio { width:100%; margin:12px 0; }
.result-card { text-align:center; margin-top:80px; }
.result-card strong { font-size:54px; display:block; }

.audio-card {
  background: var(--card);
  border-radius: 18px;
  padding: 14px 16px;
  margin: 14px 0;
  box-shadow: 0 8px 25px rgba(0,0,0,.05);
}
.audio-card strong { display: block; margin-bottom: 10px; }
.audio-card audio { width: 100%; }
#writing-answer {
  width: 100%;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(127,127,127,.35);
  border-radius: 14px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  resize: vertical;
  min-height: 180px;
}
#manual-grading-note { color: var(--hint); }
button:disabled { opacity: .45; cursor: not-allowed; }

.screen-top { margin-bottom: 18px; }
.audio-card { background: var(--card); border-radius: 18px; padding: 16px; margin-bottom: 16px; }
.audio-card audio { width: 100%; }
#writing-answer { width: 100%; min-height: 180px; resize: vertical; padding: 14px; border-radius: 14px; border: 1px solid var(--hint); background: var(--bg); color: var(--text); font: inherit; }

/* Gemini TOPIK Writing results */
#grading-status { margin: 14px 0; color: var(--hint); }
#writing-ai-results { margin-top: 20px; text-align: left; }
.ai-grade-card { background: var(--card); border-radius: 18px; padding: 18px; margin: 14px 0; box-shadow: 0 8px 25px rgba(0,0,0,.05); }
.ai-grade-header { display:flex; align-items:center; justify-content:space-between; gap:12px; }
.ai-grade-header strong { font-size:24px; }
.ai-grade-card h4 { margin:16px 0 6px; }
.ai-grade-card ul { padding-left:20px; }

/* v9: font controls, TOPIK category tabs, Writing 51-54 inputs */
:root { --font-scale: 1; }
html { font-size: calc(16px * var(--font-scale)); }
body, button, input, textarea { font-size: 1rem; }

.header-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.font-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: 14px;
  background: var(--card);
}

.font-btn {
  min-width: 42px;
  padding: 8px 10px;
  border-radius: 10px;
}

#font-size-label {
  min-width: 48px;
  text-align: center;
  color: var(--hint);
  font-size: .85rem;
  font-weight: 700;
}

.category-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0 0 20px;
}

.category-tab {
  background: var(--card);
  color: var(--text);
  border: 2px solid transparent;
}

.category-tab.active {
  border-color: var(--button);
  color: var(--button);
}

.writing-short-answers {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.short-answer-field {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  gap: 10px;
}

.short-answer-field > span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg);
  font-weight: 800;
}

.short-answer-field input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid rgba(127,127,127,.35);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.short-answer-field input:focus,
#writing-answer:focus {
  border-color: var(--button);
}

#writing-long-answer {
  margin-top: 14px;
}

.character-counter {
  margin-top: 7px;
  text-align: right;
  color: var(--hint);
  font-size: .85rem;
}

#character-count.near-limit {
  color: var(--button);
  font-weight: 800;
}

#question-text,
.choice,
#writing-answer,
.short-answer-field input {
  font-size: 1rem;
  line-height: 1.55;
}

@media (max-width: 520px) {
  .container { padding: 14px; }
  header { align-items: flex-start; gap: 12px; }
  .font-controls { gap: 4px; }
  .font-btn { min-width: 38px; padding: 7px 8px; }
  #font-size-label { min-width: 42px; }
}


/* V10: hidden must always win over component display rules.
   This prevents the ㉠/㉡ fields from appearing on Writing 53 and 54. */
.writing-short-answers[hidden],
#writing-long-answer[hidden],
#choices[hidden],
#question-image[hidden],
#question-audio[hidden],
#listening-player[hidden],
#grading-status[hidden],
#manual-grading-note[hidden] {
  display: none !important;
}

/* V17: Writing controls are visible whenever the hidden attribute is absent. */
#writing-short-answers:not([hidden]) {
  display: grid !important;
}

#writing-long-answer:not([hidden]) {
  display: block !important;
}



/* V13 — TOPIK II Writing 51–54 */
.writing-short-answers {
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 14px;
}
.short-answer-field {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}
.short-answer-symbol {
  font-size: 1.1rem;
}
#writing-answer {
  min-height: 190px;
}