:root{--bg:#f7f5ef;--surface:#fffdf8;--text:#20201d;--muted:#66645e;--line:#d9d4c8;--accent:#2f6f63;--accent-strong:#20574d;--accent-weak:#d9ebe5;--warn:#9c5c16;--danger:#9d2f2f;--shadow:0 18px 48px #20201d14}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);margin:0;font-family:Arial,Microsoft YaHei,sans-serif}body{line-height:1.6}a{color:inherit}button,textarea,input{font:inherit}button,.button{background:var(--accent);border:1px solid var(--accent);color:#fff;cursor:pointer;border-radius:8px;justify-content:center;align-items:center;min-height:40px;padding:8px 14px;font-weight:700;text-decoration:none;display:inline-flex}button:hover,.button:hover{background:var(--accent-strong)}button:focus-visible,.button:focus-visible{outline:3px solid var(--accent-strong);outline-offset:3px}button:not(.targetWordButton):active,.button:active{transform:translateY(1px)}button:disabled,.button[aria-disabled=true]{cursor:not-allowed;opacity:.55;pointer-events:none}.button.secondary,button.secondary{border-color:var(--accent);color:var(--accent-strong);background:0 0}.button.secondary:hover,button.secondary:hover{background:var(--accent-weak)}.feedbackChoice.active{background:var(--accent-weak);border-color:var(--accent-strong);box-shadow:inset 0 0 0 1px var(--accent-strong)}.page{width:min(960px,100% - 32px);margin:0 auto;padding:32px 0 56px}.stack{gap:16px;display:grid}.cluster{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.surface{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:8px;padding:20px}.muted{color:var(--muted)}.accountControls{justify-content:flex-end;align-items:center;gap:10px;display:flex}.generationProgress{gap:10px}.generationProgress.compact{background:var(--accent-weak);box-shadow:none}.generationProgressHeader{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 16px;display:flex}.generationProgress progress{accent-color:var(--accent);width:100%;height:14px}.generationProgress p{margin:0}.reading{font-size:18px;line-height:1.85}.targetWord,.lookupWord{display:inline-block;position:relative}.lookupWordButton{color:inherit;font-weight:inherit;background:0 0;border:0;border-radius:0;min-height:0;padding:0;display:inline}.lookupWordButton:hover,.lookupWordButton:focus-visible{background:var(--accent-weak);color:var(--accent-strong);outline-offset:1px}.targetWordButton{border:0;border-bottom:1px solid var(--accent);color:var(--text);background:0 0;border-radius:0;min-height:0;padding:0;font-weight:700;display:inline}.targetWordButton:hover{color:var(--accent-strong);background:0 0}.popover{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);z-index:2;border-radius:8px;gap:6px;width:260px;padding:12px;font-size:16px;font-weight:400;line-height:1.5;display:grid;position:absolute;top:1.8em;left:0}.phonetic{color:var(--accent-strong);font-family:Arial,sans-serif}.vocabularyFeedbackChoices{border-top:1px solid var(--line);margin-top:4px;padding-top:10px}.popover .vocabularyFeedbackChoices button{flex:auto;min-height:34px;padding:5px 8px}.feedbackItem{border-top:1px solid var(--line);padding-top:12px}@media (max-width:640px){.page{width:min(100% - 24px,960px);padding:24px 0 40px}h1{font-size:28px;line-height:1.2}}