/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4
 * macrostructure: narrative-workflow · theme: existing Tago paper / sage / cream
 * Audience: Korean learners · use: a guided writing sample · tone: calm and practical.
 * Real exercise controls are the visual focus; original Tago artwork is preserved.
 */
:root {
  --practice-white: #fff;
  --practice-sage-surface: #e8ece5;
  --practice-border: #d6d9d0;
  --practice-correct: #476148;
  --practice-muted: #56624f;
  --practice-error: #8e4636;
  --practice-hover: #3b4846;
  --practice-soft-shadow: 0 8px 24px -18px rgb(38 46 54 / 24%);
}
.practice-page { line-height: 1.65; }
.writing-prompt span:lang(ko), .explanation-body span:lang(ko) { white-space: nowrap; }
.practice-page .practice-shell { width: min(1120px, calc(100% - 40px)); }
.practice-page a, .practice-page button, .practice-page summary, .answer-choice span { -webkit-tap-highlight-color: transparent; }
.practice-page :focus-visible { outline: 2px solid var(--color-focus); outline-offset: 4px; }
.practice-icon { display: block; width: 20px; height: 20px; flex-shrink: 0; }
.practice-header { display: flex; justify-content: space-between; align-items: center; min-height: 96px; gap: 24px; border-bottom: 1px solid var(--color-rule); }
.practice-brand { display: inline-flex; align-items: center; min-height: 44px; }
.practice-brand img { display: block; width: 108px; height: auto; }
.language-menu { position: relative; z-index: 5; }
.language-menu summary { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; padding: 8px 12px; border: 1px solid var(--color-rule); border-radius: 12px; font-size: 14px; cursor: pointer; list-style: none; white-space: nowrap; }
.language-menu summary::-webkit-details-marker, .explanation summary::-webkit-details-marker { display: none; }
.language-menu summary .practice-icon:last-child { width: 14px; height: 14px; }
.language-menu[open] summary { background: var(--practice-white); color: var(--color-ink); border-color: var(--color-accent); }
.language-menu[open] summary .practice-icon:last-child { transform: rotate(180deg); }
.language-menu nav { position: absolute; top: calc(100% + 8px); right: 0; width: 180px; padding: 6px; background: var(--practice-white); color: var(--color-ink); border: 1px solid var(--color-rule); border-radius: 12px; box-shadow: var(--practice-soft-shadow); }
.language-menu nav a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; border-radius: 8px; text-decoration: none; font-size: 14px; white-space: nowrap; }
.language-menu nav a[aria-current] { background: var(--practice-sage-surface); color: var(--color-ink); font-weight: 600; }
.practice { padding-block: 40px 0; }
.lesson-intro { max-width: 820px; }
.lesson-eyebrow { margin-bottom: 12px; color: var(--color-accent-strong); font-size: 12px; font-weight: 600; letter-spacing: .07em; text-transform: uppercase; }
.practice h1 { max-width: 780px; font-size: clamp(32px, 3.5vw, 44px); line-height: 1.22; letter-spacing: -.035em; text-wrap: balance; }
.lesson-lead { max-width: 640px; margin-top: 16px; margin-bottom: 0; font-size: 16px; color: var(--color-accent-strong); }
.practice-topics { display: flex; gap: 6px; margin-top: 28px; margin-bottom: 20px; border-bottom: 1px solid var(--color-rule); padding-bottom: 12px; }
.practice-topics a { display: flex; align-items: center; justify-content: center; min-height: 44px; min-width: 100px; padding: 10px 18px; border-radius: 10px; color: var(--color-accent-strong); text-decoration: none; font-weight: 600; font-size: 14px; white-space: nowrap; }
.practice-topics a[aria-current] { background: var(--color-ink); color: var(--color-paper); }
.lesson-workspace { display: grid; grid-template-columns: minmax(0, 1fr); align-items: stretch; gap: 20px; }
.example-panel, .writing-panel { min-width: 0; padding: 24px; border-radius: 16px; }
.example-panel { border: 1px solid var(--practice-border); background: var(--practice-white); color: var(--color-ink); }
.writing-panel { border: 1px solid var(--practice-sage-surface); background: var(--practice-sage-surface); color: var(--color-ink); }
.panel-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.panel-heading h2 { margin: 0; font-size: 18px; font-weight: 600; line-height: 1.4; letter-spacing: -.02em; text-wrap: wrap; }
.panel-heading > .practice-icon { margin-left: auto; color: var(--color-accent-strong); }
.step-number { display: grid; place-items: center; flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--color-paper); color: var(--color-accent-strong); font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; }
.practice .example { margin: 0 0 24px; padding: 28px 20px; border-radius: 12px; background: var(--color-plate); color: var(--color-ink); font-size: clamp(24px, 2.2vw, 30px); font-weight: 600; line-height: 1.9; word-break: keep-all; overflow-wrap: anywhere; }
.sentence-blank { display: inline-block; min-width: 58px; margin-inline: 3px; border-bottom: 2px solid var(--color-accent-strong); color: var(--color-accent-strong); text-align: center; font-weight: 400; line-height: 1.2; }
#answer { border: 0; margin: 0; padding: 0; min-width: 0; }
#answer legend { margin-bottom: 12px; padding: 0; font-size: 14px; }
.answer-choices { display: flex; flex-wrap: wrap; gap: 12px; }
.answer-choice { position: relative; cursor: pointer; }
.answer-choice input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.answer-choice span { display: flex; align-items: center; justify-content: center; gap: 12px; min-width: 92px; min-height: 52px; padding: 10px 20px; border: 1px solid var(--practice-border); border-radius: 12px; background: var(--practice-white); color: var(--color-ink); font-size: 20px; font-weight: 600; transition: background-color 160ms, border-color 160ms; }
.answer-choice span::before { content: ''; box-sizing: border-box; flex-shrink: 0; width: 18px; height: 18px; border: 1px solid var(--color-accent); border-radius: 50%; }
.answer-choice input:checked + span { border-color: var(--color-accent-strong); background: var(--practice-sage-surface); color: var(--color-ink); }
.answer-choice input:checked + span::before { border: 5px solid var(--color-accent-strong); }
.answer-choice input:focus-visible + span { outline: 2px solid var(--color-focus); outline-offset: 4px; }
.answer-choice input:active + span { background: var(--color-plate); color: var(--color-ink); }
.answer-choice input:disabled + span { opacity: .55; cursor: not-allowed; }
.exercise-action { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 24px; }
.practice-button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 48px; padding: 11px 20px; border: 1px solid var(--color-ink); border-radius: 12px; background: var(--color-ink); color: var(--color-paper); font: 600 14px/1.5 var(--font-body); text-decoration: none; cursor: pointer; white-space: nowrap; transition: background-color 160ms; }
.practice-button:active { background: var(--practice-hover); color: var(--color-paper); transform: translateY(1px); }
.practice-button:disabled { opacity: .55; cursor: not-allowed; }
.button-secondary { border-color: var(--practice-border); background: var(--color-paper); color: var(--color-ink); }
#result { flex: 1 1 160px; margin: 0; font-size: 13px; line-height: 1.6; }
#result:empty { display: none; }
#exercise[data-state="error"] #result { color: var(--practice-error); }
#exercise[data-state="success"] #result { color: var(--practice-correct); }
#exercise[data-state="error"] .answer-choice input:checked + span { border-color: var(--practice-error); }
#exercise[data-state="error"] .sentence-blank { color: var(--practice-error); border-color: var(--practice-error); }
#exercise[data-state="success"] .sentence-blank { color: var(--practice-correct); border-color: var(--practice-correct); }
.explanation { margin-top: 24px; border-top: 1px solid var(--color-rule); }
.explanation summary { display: flex; align-items: center; gap: 10px; min-height: 48px; padding-block: 12px; font-size: 14px; font-weight: 600; cursor: pointer; list-style: none; }
.explanation summary .practice-icon { width: 16px; height: 16px; }
.explanation[open] summary .practice-icon { transform: rotate(180deg); }
.explanation-body { padding: 4px 0 8px 26px; font-size: 14px; }
.explanation-body p { margin-bottom: 12px; }
.correct-sentence { font-size: 18px; font-weight: 600; color: var(--color-accent-strong); }
.authored-note { margin: 12px 0 0; color: var(--color-accent-strong); font-size: 12px; }
.writing-prompt { margin-bottom: 24px; font-size: 15px; }
.writing-prompt p { margin-bottom: 0; }
.prompt-label { color: var(--practice-muted); font-size: 12px; font-weight: 600; margin-bottom: 8px !important; }
.writing-label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; }
.writing-paper { position: relative; }
.practice textarea { display: block; width: 100%; min-height: 208px; padding: 16px 18px 40px; border: 1px solid var(--practice-border); border-radius: 12px; background: var(--practice-white); color: var(--color-ink); font: 400 18px/1.9 var(--font-body); resize: vertical; }
.practice textarea::placeholder { color: var(--color-accent-strong); opacity: 1; }
.practice textarea:focus-visible { border-color: var(--color-accent-strong); }
.writing-count { position: absolute; bottom: 12px; right: 18px; color: var(--practice-muted); font-size: 12px; font-variant-numeric: tabular-nums; pointer-events: none; }
.writing-privacy { display: flex; align-items: flex-start; gap: 8px; margin: 12px 0 0; color: var(--practice-muted); font-size: 12px; line-height: 1.7; }
.writing-privacy .practice-icon { width: 15px; height: 15px; margin-top: 2px; }
.practice-next { display: flex; flex-direction: column; gap: 24px; margin-block: 36px; padding-block: 28px; border-block: 1px solid var(--color-rule); }
.practice-next h2 { margin: 0 0 8px; font-size: 20px; letter-spacing: -.02em; text-wrap: wrap; }
.practice-next p { max-width: 440px; margin-bottom: 8px; color: var(--color-accent-strong); font-size: 14px; }
.app-detail-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; color: var(--color-ink); font-size: 14px; font-weight: 600; text-decoration: none; white-space: nowrap; }
.app-detail-link .practice-icon { width: 18px; height: 18px; }
.practice-store-links { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.practice-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-bottom: 32px; color: var(--color-accent-strong); font-size: 12px; }
#challenge { border-top: 1px solid var(--color-rule); padding-block: 24px; }
#challenge h2 { margin-top: 0; }
#challenge label { display: block; margin-block: 16px 8px; }
#challenge input { max-width: 100%; min-height: 48px; padding: 10px; font: inherit; }
#challenge button { min-height: 48px; padding: 12px 16px; border: 0; border-radius: 12px; background: var(--color-ink); color: var(--color-paper); font: inherit; }
@media (hover: hover) {
  .language-menu summary:hover, .language-menu nav a:hover { background: var(--practice-sage-surface); color: var(--color-ink); }
  .practice-topics a:not([aria-current]):hover { background: var(--practice-sage-surface); color: var(--color-ink); }
  .answer-choice input:not(:checked):hover + span { background: var(--color-paper); color: var(--color-ink); }
  .practice-button:hover { background: var(--practice-hover); color: var(--color-paper); }
  .button-secondary:hover { background: var(--practice-sage-surface); color: var(--color-ink); }
  .explanation summary:hover, .app-detail-link:hover { color: var(--color-accent-strong); }
  .app-detail-link:hover { text-decoration: underline; }
  .practice textarea:hover { border-color: var(--color-accent); }
}
@media (min-width: 640px) {
  .practice-page .practice-shell { width: min(1120px, calc(100% - 64px)); }
  .practice { padding-top: 48px; }
  .example-panel, .writing-panel { padding: 32px; }
  .practice-next { flex-direction: row; justify-content: space-between; align-items: center; }
  .practice-store-links { flex-shrink: 0; }
}
@media (min-width: 960px) {
  .lesson-workspace { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); }
}
@media (max-width: 639px) {
  .practice-header { min-height: 84px; gap: 16px; }
  .practice-brand img { width: 96px; }
  .language-menu summary { padding-inline: 10px; }
  .practice { padding-top: 28px; }
  .practice-topics a { min-width: 0; flex: 1; padding-inline: 12px; }
  .example-panel, .writing-panel { padding: 20px; }
  .panel-heading { gap: 10px; margin-bottom: 20px; }
  .panel-heading h2 { font-size: 17px; }
  .practice .example { padding: 22px 16px; }
  .practice-store-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .practice-store-links .practice-button { gap: 10px; padding-inline: 12px; }
  .practice-footer > span:last-child { width: 100%; }
}
@media (max-width: 359px) {
  .practice-page .practice-shell { width: calc(100% - 32px); }
  .example-panel, .writing-panel { padding: 18px; }
  .practice-store-links { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .practice-page *, .practice-page *::before { scroll-behavior: auto; transition: none; }
}