:root{color:#17211f;background:#f6f7f4;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input,select{font:inherit}button{cursor:pointer}.app-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:28px 0 52px}.login-screen{min-height:calc(100vh - 80px);display:grid;align-items:center}.login-copy{max-width:760px}.eyebrow{margin:0 0 8px;color:#5a6b62;font-size:.8rem;font-weight:700;letter-spacing:0;text-transform:uppercase}h1,h2,p{margin-top:0}h1{max-width:820px;margin-bottom:12px;font-size:clamp(2.2rem,7vw,5.4rem);line-height:.98;letter-spacing:0}h2{margin-bottom:8px;font-size:1.2rem;letter-spacing:0}.login-copy p:not(.eyebrow){max-width:560px;color:#4a5b54;font-size:1.05rem}.login-actions,.settings-actions,.row-actions,.test-toolbar,.answer-form{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.primary-button,.secondary-button,.ghost-button,.icon-button,.tabs button{min-height:42px;border:1px solid transparent;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;transition:transform .12s ease,border-color .12s ease,background .12s ease}.primary-button{padding:0 16px;background:#101820;color:#fff}.secondary-button{padding:0 14px;background:#e9eee8;color:#17211f;border-color:#cbd6cf}.ghost-button{padding:0 14px;background:transparent;color:#24332e;border-color:#cbd6cf}.icon-button{width:42px;background:#fff;color:#17211f;border-color:#dce4df}.primary-button:disabled{opacity:.55;cursor:not-allowed}.topbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:18px}.topbar h1{margin:0;font-size:clamp(2rem,5vw,4rem)}.notice{display:flex;align-items:center;gap:10px;margin-bottom:18px;padding:12px 14px;border:1px solid #eed89a;border-radius:8px;background:#fff8df}.notice button{margin-left:auto;border:0;background:transparent;font-weight:700;color:#7a5514}.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:18px}.metric{min-height:104px;padding:14px;border:1px solid #dce4df;border-radius:8px;background:#fff;display:grid;align-content:space-between}.metric span{color:#2d766f}.metric small{color:#6b7b74}.metric strong{font-size:1.35rem}.tabs{position:sticky;top:0;z-index:2;display:flex;gap:8px;padding:8px 0 16px;background:#f6f7f4}.tabs button{flex:1;padding:0 12px;background:#fff;color:#44544e;border-color:#dce4df}.tabs button.active{background:#101820;color:#fff}.item-list{display:grid;gap:10px}.word-row{display:grid;grid-template-columns:1fr auto;gap:16px;padding:16px;border:1px solid #dce4df;border-radius:8px;background:#fff}.word-row.passed{border-color:#83b8a6;background:#f0faf5}.word-title{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline}.word-title span{width:28px;height:28px;border-radius:50%;display:inline-grid;place-items:center;background:#101820;color:#fff;font-size:.85rem}.word-title h2{margin:0;font-size:1.55rem}.word-title em{color:#65766f;font-style:normal}.meaning{margin:10px 0 8px;font-weight:700}.translation{color:#65766f}.test-panel,.donation-panel,.settings-panel{padding:18px;border:1px solid #dce4df;border-radius:8px;background:#fff}.test-toolbar{justify-content:space-between}select,input{min-height:42px;border:1px solid #cbd6cf;border-radius:8px;padding:0 12px;background:#fff}.segmented{display:inline-flex;padding:4px;border:1px solid #dce4df;border-radius:8px;background:#f2f5f0}.segmented button{min-height:34px;border:0;border-radius:6px;padding:0 12px;background:transparent}.segmented button.active{background:#fff;color:#101820;box-shadow:0 1px 4px #10182024}.prompt-box{margin:16px 0;padding:20px;border-radius:8px;background:#101820;color:#fff}.prompt-box small{display:block;margin-bottom:8px;color:#bdd0c7}.prompt-box strong{font-size:clamp(1.6rem,5vw,3rem);letter-spacing:0}.answer-form input{flex:1 1 260px}.section-heading{display:flex;justify-content:space-between;gap:12px;align-items:baseline}.section-heading p{color:#65766f}.upload-box,.empty{padding:18px;border:1px dashed #b6c6be;border-radius:8px;background:#f8faf7}.mission-list{display:grid;gap:8px;margin-top:14px}.mission{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;padding:12px;border:1px solid #e2e8e4;border-radius:8px}.settings-panel{display:grid;gap:14px}.settings-panel label{display:grid;gap:6px;color:#40504a;font-weight:700}.settings-panel .toggle{display:flex;align-items:center;gap:10px}.settings-panel .toggle input{min-height:0;width:18px;height:18px}.toast{position:fixed;right:18px;bottom:18px;max-width:min(420px,calc(100% - 36px));padding:12px 14px;border-radius:8px;background:#101820;color:#fff;box-shadow:0 18px 50px #1018203d}@media(max-width:780px){.app-shell{width:min(100% - 20px,1120px);padding-top:18px}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.word-row{grid-template-columns:1fr}.tabs{overflow-x:auto}.tabs button{flex:0 0 auto;min-width:98px}.section-heading,.test-toolbar{align-items:stretch;flex-direction:column}}