.translation-course-page{--tc-ink:#243e39;--tc-teal:#16776c;--tc-muted:#667974;--tc-line:#d8e6e1;--tc-paper:#fff;--tc-bg:#f5f8f7;--tc-amber:#9a650f;color:var(--tc-ink);max-width:1120px;margin:0 auto;font-family:inherit;overflow-wrap:anywhere}
.translation-course-page *{box-sizing:border-box}
.tc-header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:12px 0 18px}
.tc-header h1{font-size:clamp(25px,3vw,34px);letter-spacing:-.04em;line-height:1.3;margin:8px 0 12px}.tc-header p{margin:0;line-height:1.8}
.tc-kicker{font-size:13px;font-weight:700;color:var(--tc-teal)}.tc-progress{display:grid;gap:4px;min-width:120px;color:var(--tc-muted);font-size:12px}.tc-progress strong{font-size:27px;color:var(--tc-teal);font-variant-numeric:tabular-nums}.tc-progress progress{width:120px;height:7px;accent-color:var(--tc-teal)}
.tc-save-note,.tc-muted{font-size:13px;line-height:1.7;color:var(--tc-muted)}.tc-save-note{border-left:3px solid var(--tc-line);padding-left:12px;margin:0 0 22px}
.tc-catalog{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:24px}
.tc-catalog button{font:inherit;text-align:left;display:grid;align-content:start;gap:6px;border:1px solid var(--tc-line);background:var(--tc-paper);padding:16px;border-radius:12px;color:var(--tc-ink);cursor:pointer;min-width:0}
.tc-catalog button[aria-current]{border-color:var(--tc-teal);box-shadow:inset 0 3px var(--tc-teal);background:#edf6f2}.tc-course-index{font-family:Consolas,monospace;font-size:12px;color:var(--tc-teal)}.tc-catalog strong{font-size:15px}.tc-catalog span:not(.tc-course-index),.tc-catalog small{font-size:12px;line-height:1.6;color:var(--tc-muted)}.tc-catalog small{margin-top:6px;color:var(--tc-teal)}
.tc-workbook{border:1px solid var(--tc-line);border-radius:16px;background:var(--tc-paper);overflow:hidden}.tc-lesson-heading{padding:24px 28px 14px}.tc-lesson-heading h2{font-size:23px;margin:0 0 8px}.tc-lesson-heading p{margin:0;color:var(--tc-muted);font-size:13px;line-height:1.8}
.tc-tabs{display:flex;border-bottom:1px solid var(--tc-line);padding:0 28px;gap:12px}.tc-tabs .tc-button{border:0;border-radius:0;background:transparent;padding:14px 4px;border-bottom:3px solid transparent;color:var(--tc-muted)}.tc-tabs .tc-button[aria-pressed=true]{color:var(--tc-teal);border-bottom-color:var(--tc-teal);font-weight:700}
.tc-content{padding:24px 28px;line-height:1.9}.tc-content h3{font-size:18px;margin:0 0 10px}.tc-content h4{font-size:15px;margin:20px 0 8px}.tc-teaching-step{margin-bottom:28px}.tc-teaching-step>p{margin:0 0 12px}.tc-example{background:var(--tc-bg);border-left:3px solid var(--tc-teal);padding:12px 18px}.tc-example p{margin:5px 0 10px}.tc-english{font-family:Georgia,'Times New Roman',serif;font-size:18px;line-height:1.85;white-space:pre-wrap}.tc-example .tc-annotation{border-top:1px dashed var(--tc-line);padding-top:10px;font-size:13px;color:var(--tc-amber);margin-bottom:0}
.tc-button{min-height:44px;cursor:pointer;border:1px solid var(--tc-line);border-radius:9px;background:var(--tc-paper);color:var(--tc-teal);padding:10px 16px;font:inherit;font-size:14px;line-height:1.5}.tc-primary{background:var(--tc-teal);border-color:var(--tc-teal);color:#fff}.tc-button:disabled{cursor:default;opacity:.5}.translation-course-page button:focus-visible,.translation-course-page input:focus-visible,.translation-course-page textarea:focus-visible,.translation-course-page summary:focus-visible{outline:3px solid #d6a84b;outline-offset:3px}.tc-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.tc-actions p{flex-basis:100%;margin:0}
.tc-check,.tc-option{display:flex;align-items:flex-start;gap:10px;padding:9px 0;cursor:pointer;font-size:14px}.tc-check input,.tc-option input{margin-top:7px;flex:none;width:17px;height:17px;accent-color:var(--tc-teal)}.tc-check{margin-bottom:10px}.tc-question{border:0;padding:0;margin:0 0 28px;min-width:0}.tc-question legend{font-weight:700;line-height:1.7;margin-bottom:10px}.tc-option{padding:10px 14px;border:1px solid var(--tc-line);border-radius:8px;margin-bottom:8px}.tc-option:has(input:checked){background:#edf6f2;border-color:var(--tc-teal)}.tc-answer{padding:14px 18px;background:var(--tc-bg);border-left:3px solid var(--tc-teal);font-size:14px}.tc-answer p{margin:5px 0}.tc-answer strong{color:var(--tc-teal)}
.tc-practice-grid,.tc-review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.tc-practice-grid>section,.tc-review-grid>div{min-width:0}.tc-prompt{line-height:2.1;margin-top:0}.tc-label{display:block;font-size:16px;font-weight:700;margin-bottom:8px}.translation-course-page textarea{width:100%;min-height:255px;border:1px solid var(--tc-line);border-radius:9px;padding:14px;font:16px/1.9 Georgia,'Times New Roman',serif;resize:vertical;color:var(--tc-ink);background:var(--tc-paper)}.translation-course-page textarea.tc-reflection{min-height:100px;font-family:inherit;font-size:14px}.translation-course-page textarea[readonly]{background:var(--tc-bg)}
.tc-hints,.tc-history{border-top:1px solid var(--tc-line);margin-top:18px;padding-top:12px;font-size:14px}.translation-course-page summary{cursor:pointer;color:var(--tc-teal);min-height:40px;padding:5px 0}.tc-review{margin-top:28px;border-top:1px solid var(--tc-line);padding-top:24px}.tc-reference{background:var(--tc-bg);padding:20px;border-radius:9px;margin-bottom:16px}.tc-phrases{margin:0}.tc-phrases>div{padding:8px 0;border-bottom:1px solid var(--tc-line)}.tc-phrases dt{font-size:13px;color:var(--tc-muted)}.tc-phrases dd{margin:0;font-size:16px}.tc-time{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;margin:16px 0}.tc-time input{width:80px;padding:8px;border:1px solid var(--tc-line);border-radius:6px;font:inherit}.tc-complete{margin-top:18px}.tc-finished{background:#edf6f2;padding:20px;border-radius:10px}.tc-finished>strong{color:var(--tc-teal)}.tc-notice{margin:18px 28px 0;background:#edf6f2;padding:12px 16px;line-height:1.8;font-size:14px}.tc-history section+section{border-top:1px solid var(--tc-line)}
@media(max-width:760px){.tc-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.tc-practice-grid,.tc-review-grid{grid-template-columns:1fr}.tc-header{align-items:flex-start;gap:12px}.tc-progress{min-width:70px}.tc-progress progress{width:70px}.tc-lesson-heading,.tc-content{padding:20px 16px}.tc-tabs{padding:0 12px;gap:10px}.tc-tabs .tc-button{font-size:12px}.tc-notice{margin:16px 16px 0}.tc-reference{padding:14px}}
@media(prefers-reduced-motion:reduce){.translation-course-page *{scroll-behavior:auto}}