:root{color-scheme:light;--bg:#f4f3ef;--surface:#fbfaf7;--paper:#fffefa;--ink:#20231f;--muted:#858981;--accent:#c77758;--accent-light:#f6e9e2;--line:rgba(57,62,53,.09);--shadow:0 22px 58px rgba(42,44,37,.075),0 3px 12px rgba(42,44,37,.035);--green:#e5f2e9;--green-ink:#387351;--red:#f8e7e5;--red-ink:#a94e48;--mono:'DM Mono',ui-monospace,monospace;--sans:'DM Sans','Noto Sans SC',sans-serif}
*{box-sizing:border-box}html{min-height:100%;background:var(--bg)}body{margin:0;min-height:100vh;min-height:100dvh;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}button{font:inherit;color:inherit}.app-shell{position:relative;width:min(100% - 64px,900px);min-height:100vh;min-height:100dvh;margin:0 auto;padding:24px 0 max(22px,env(safe-area-inset-bottom));display:flex;flex-direction:column}.topbar{height:48px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;position:relative;z-index:4}.brand{justify-self:start;color:var(--ink);font-size:14px;font-weight:600;letter-spacing:.02em;text-decoration:none}.mode-switch{display:flex;align-items:center;padding:3px;background:var(--surface);border-radius:13px;box-shadow:0 3px 12px rgba(31,34,27,.055),inset 0 0 0 1px var(--line)}.mode-button{position:relative;min-width:58px;height:31px;padding:0 12px;border:0;border-radius:10px;background:transparent;color:var(--muted);font-size:12px;cursor:pointer;transition:color .25s cubic-bezier(.22,1,.36,1),background .35s cubic-bezier(.22,1,.36,1),box-shadow .35s cubic-bezier(.22,1,.36,1)}.mode-button.active{color:var(--ink);background:var(--paper);box-shadow:0 2px 7px rgba(37,40,32,.09)}.top-actions{justify-self:end;display:flex;align-items:center;gap:5px}.icon-button{width:36px;height:36px;display:grid;place-items:center;border:0;border-radius:12px;background:transparent;color:var(--muted);cursor:pointer;transition:background .2s,color .2s,transform .2s}.icon-button:hover,.icon-button.active{background:var(--surface);color:var(--ink)}.icon-button:active{transform:scale(.94)}.icon-button svg,.search-field svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.search-panel{position:absolute;right:0;top:calc(100% + 10px);width:min(440px,calc(100vw - 34px));padding:10px;background:var(--paper);border-radius:20px;box-shadow:0 20px 55px rgba(22,24,20,.17),0 0 0 1px var(--line);z-index:10;transform-origin:top right;animation:panelIn .3s cubic-bezier(.16,1,.3,1)}.search-field{height:43px;display:flex;align-items:center;gap:10px;padding:0 12px;background:var(--surface);border-radius:13px;color:var(--muted);box-shadow:inset 0 0 0 1px var(--line)}.search-field svg{width:17px;height:17px;flex:none}.search-field input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--ink);font:400 13px var(--sans)}.search-field input::placeholder{color:#aeb0a8}.search-field input::-webkit-search-cancel-button{display:none}.clear-search{border:0;background:none;color:var(--muted);font-size:20px;line-height:1;cursor:pointer}.search-results{max-height:min(55vh,430px);overflow:auto;padding:5px 0 0}.search-result{position:relative;width:100%;display:grid;gap:5px;padding:11px 68px 11px 12px;border:0;border-radius:12px;background:transparent;text-align:left;cursor:pointer;transition:background .18s}.search-result:hover,.search-result:focus-visible{background:var(--surface);outline:none}.search-result-heading{font-size:12px;font-weight:600;color:var(--ink)}.search-result-excerpt{font-size:11px;line-height:1.5;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.search-result-tag{position:absolute;right:11px;top:12px;padding:4px 7px;border-radius:8px;background:var(--accent-light);color:var(--accent);font-size:9px}.search-result mark{background:rgba(211,137,102,.22);color:#a95c3e;border-radius:3px;padding:0 1px}.search-empty{padding:15px 12px;color:var(--muted);font-size:12px}.quiz-layout{width:min(100%,660px);margin:auto auto 0}.quiz-meta{margin-bottom:14px}.progress-label{display:flex;align-items:center;gap:14px}.progress-track{height:3px;flex:1;border-radius:5px;background:rgba(87,92,80,.11);overflow:hidden}.progress-fill{display:block;height:100%;width:0;background:var(--accent);border-radius:5px;transition:width .42s cubic-bezier(.22,1,.36,1)}.counter{font-family:var(--mono);font-size:11px;font-variant-numeric:tabular-nums;letter-spacing:.035em;white-space:nowrap}.counter span{color:#c4c6bf;margin:0 3px}.question-card{position:relative;padding:21px 26px 23px;background:var(--paper);border-radius:26px;box-shadow:var(--shadow),0 0 0 1px rgba(57,62,53,.04),0 0 0 5px rgba(245,243,237,.78);min-height:196px;display:flex;flex-direction:column;justify-content:center;overflow:hidden}.question-card:before{content:"";position:absolute;width:180px;height:180px;right:-91px;top:-104px;border:1px solid rgba(199,119,88,.1);border-radius:50%;box-shadow:0 0 0 15px rgba(199,119,88,.025),0 0 0 31px rgba(199,119,88,.02)}.question-type{position:absolute;top:17px;left:20px;color:#aa8779;font-size:10px;letter-spacing:.04em}.definition-wrap{position:relative;margin-top:9px;padding:11px 8px 5px 24px;max-width:600px;align-self:center}.quote-mark{position:absolute;left:0;top:0;color:#d7a18b;font-family:Georgia,serif;font-size:34px;line-height:1}.definition{font-size:clamp(17px,2.6vw,21px);line-height:1.62;letter-spacing:-.02em;margin:0;color:#343730;text-wrap:pretty;overflow-wrap:anywhere}.options{display:grid;gap:9px;margin-top:22px}.option-button{width:100%;min-height:49px;padding:0 15px;border:0;border-radius:16px;background:var(--surface);box-shadow:0 0 0 1px rgba(57,62,53,.045),0 4px 13px rgba(42,44,37,.025);display:flex;align-items:center;text-align:left;cursor:pointer;position:relative;transition:transform .22s cubic-bezier(.22,1,.36,1),background .22s,box-shadow .22s,color .22s;animation:optionIn .38s both;animation-delay:var(--delay,0ms);-webkit-tap-highlight-color:transparent}.option-button:hover{transform:translateY(-1px);background:var(--paper);box-shadow:0 0 0 1px rgba(199,119,88,.18),0 8px 18px rgba(42,44,37,.055)}.option-letter{width:23px;height:23px;display:grid;place-items:center;border-radius:8px;background:rgba(71,77,66,.055);font-family:var(--mono);font-size:9px;color:#979b91;margin-right:12px;flex:0 0 auto}.option-word{font-size:14px;letter-spacing:.005em;font-weight:500}.option-tail{margin-left:auto;opacity:0;color:currentColor;font-size:15px;transition:opacity .2s}.option-button.correct{background:var(--green);color:var(--green-ink);box-shadow:0 0 0 1px rgba(56,115,81,.12),0 8px 20px rgba(56,115,81,.08)}.option-button.correct .option-letter{background:rgba(56,115,81,.12);color:var(--green-ink)}.option-button.correct .option-tail{opacity:1}.option-button.incorrect{background:var(--red);color:var(--red-ink);box-shadow:0 0 0 1px rgba(169,78,72,.12),0 8px 20px rgba(169,78,72,.06);animation:shake .28s ease}.option-button.incorrect .option-letter{background:rgba(169,78,72,.12);color:var(--red-ink)}.option-button:disabled{cursor:default}.option-button.locked{pointer-events:none}.summary-view{width:min(100%,660px);margin:auto auto 0;animation:fadeUp .4s both}.summary-card{padding:27px;background:var(--paper);border-radius:28px;box-shadow:var(--shadow),0 0 0 1px var(--line)}.summary-card h1{margin:0 0 18px;font-size:22px;letter-spacing:-.04em;font-weight:600}.score-row{display:flex;align-items:center;gap:24px;margin-bottom:22px;padding:19px 21px;background:var(--surface);border-radius:21px;box-shadow:0 0 0 1px var(--line)}.score-ring{width:88px;height:88px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--accent) var(--score,0%),rgba(95,100,89,.11) 0);position:relative;flex:none}.score-ring:before{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--paper)}.score-ring div{position:relative;text-align:center;display:grid;gap:2px}.score-ring strong{font-family:var(--mono);font-size:19px;font-weight:500;font-variant-numeric:tabular-nums}.score-ring span{font-size:8px;color:var(--muted)}.score-stats{display:flex;gap:27px}.score-stats div{display:grid;gap:5px}.score-stats strong{font-family:var(--mono);font-size:21px;font-weight:500}.score-stats span{font-size:10px;color:var(--muted)}.detail-heading{display:flex;align-items:center;justify-content:space-between;font-size:11px;font-weight:600;margin-bottom:11px}.detail-legend{font-size:9px;color:var(--muted);display:flex;align-items:center;gap:5px;font-weight:400}.legend-dot{display:inline-block;width:7px;height:7px;border-radius:3px;margin-left:7px}.legend-dot.right{background:#9bc3a7}.legend-dot.wrong{background:#dda19a}.detail-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:7px}.detail-tile{border:0;aspect-ratio:1;border-radius:11px;background:var(--green);color:#497d5b;display:grid;place-items:center;font-family:var(--mono);font-size:10px;cursor:pointer;transition:transform .18s,filter .18s;box-shadow:0 0 0 1px rgba(56,115,81,.08)}.detail-tile:hover{transform:translateY(-2px);filter:saturate(1.18)}.detail-tile.missed{background:var(--red);color:#ad5952;box-shadow:0 0 0 1px rgba(169,78,72,.08)}.summary-actions{display:flex;align-items:center;gap:14px;margin-top:22px}.primary-button{height:42px;padding:0 18px;border:0;border-radius:13px;background:var(--ink);color:#fff;font-size:11px;cursor:pointer;transition:transform .2s}.primary-button:hover{transform:translateY(-1px)}.text-button{border:0;background:none;color:var(--muted);font-size:10px;cursor:pointer;padding:10px}.toast{position:fixed;left:50%;bottom:max(24px,calc(env(safe-area-inset-bottom) + 12px));transform:translate(-50%,12px);background:var(--ink);color:var(--paper);padding:10px 15px;border-radius:13px;font-size:11px;opacity:0;pointer-events:none;transition:all .22s;box-shadow:0 8px 25px rgba(0,0,0,.15);z-index:20;white-space:nowrap}.toast.show{opacity:1;transform:translate(-50%,0)}.hidden{display:none!important}.mode-entering .question-card{animation:modeShift .5s cubic-bezier(.16,1,.3,1) both}.mode-entering .options{animation:modeShift .56s cubic-bezier(.16,1,.3,1) both;animation-delay:55ms}.mode-entering .option-button{animation-name:optionIn;animation-duration:.42s}.quiz-layout.mode-entering .progress-fill{transition:none}
@keyframes optionIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes shake{0%,100%{translate:0}25%{translate:-4px}75%{translate:4px}}@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes panelIn{from{opacity:0;transform:translateY(-6px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes modeShift{0%{opacity:.45;transform:translateX(18px) scale(.99);filter:blur(2px)}65%{opacity:1;transform:translateX(-2px) scale(1.003);filter:blur(0)}100%{opacity:1;transform:translateX(0) scale(1)}}
[data-theme="dark"]{color-scheme:dark;--bg:#171a18;--surface:#202421;--paper:#242925;--ink:#f1f0e9;--muted:#a3a99f;--accent:#e3916c;--accent-light:#3b2d28;--line:rgba(233,238,227,.075);--shadow:0 24px 70px rgba(0,0,0,.24),0 3px 12px rgba(0,0,0,.17);--green:#243a2c;--green-ink:#9bceaa;--red:#432b2a;--red-ink:#e3a09a}[data-theme="dark"] .definition{color:#e5e5dd}[data-theme="dark"] .brand{color:#f1f0e9}[data-theme="dark"] .option-letter{background:rgba(255,255,255,.055);color:#a3a99f}[data-theme="dark"] .score-ring:before{background:var(--paper)}[data-theme="dark"] .primary-button{background:#ebe9df;color:#222620}[data-theme="dark"] .search-result mark{color:#ffd0b8;background:rgba(227,145,108,.23)}
@media(max-width:640px){.app-shell{width:min(100% - 34px,500px);padding-top:max(12px,env(safe-area-inset-top))}.topbar{height:44px}.brand{font-size:13px}.top-actions{gap:1px}.icon-button{width:33px;height:34px}.icon-button svg{width:17px;height:17px}.mode-button{min-width:52px;height:30px;padding:0 9px;font-size:11px}.quiz-layout,.summary-view{margin-top:auto;margin-bottom:auto}.question-card{border-radius:23px;padding:20px 19px 22px;min-height:190px}.definition-wrap{padding-right:1px}.definition{font-size:18px;line-height:1.62}.options{gap:8px;margin-top:20px}.option-button{min-height:50px;border-radius:15px;padding:0 13px}.option-word{font-size:14px}.summary-card{padding:22px 18px;border-radius:25px}.detail-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}.detail-tile{border-radius:10px}.score-row{gap:18px;padding:16px}.score-stats{gap:20px}.search-panel{right:-2px;top:calc(100% + 8px)}}
@media(max-width:380px){.app-shell{width:calc(100% - 26px)}.topbar{grid-template-columns:auto auto 1fr;column-gap:5px}.mode-switch{justify-self:center}.order-button{display:none}.icon-button{width:31px}.question-card{min-height:178px}.definition{font-size:17px}.detail-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.score-ring{width:80px;height:80px}.score-stats{gap:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* Question controls and compact page footer */
.question-navigation{display:flex;align-items:center;justify-content:space-between;margin-top:14px;min-height:38px}
.nav-button{display:inline-flex;align-items:center;gap:5px;padding:7px 2px;border:0;background:transparent;color:var(--muted);font-size:12px;cursor:pointer;transition:color .2s,transform .2s cubic-bezier(.22,1,.36,1)}
.nav-button:hover:not(:disabled){color:var(--ink);transform:translateY(-1px)}
.nav-button:disabled{opacity:.36;cursor:default}
.nav-button svg,.about-toggle svg,.about-card-heading button svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-button.next{color:var(--ink)}
.site-footer{position:relative;width:min(100%,900px);margin:16px auto 0;padding:10px 2px 0;display:flex;align-items:center;justify-content:space-between;color:var(--muted)}
.copyright{font-size:10px;letter-spacing:.015em}
.about-toggle{display:inline-flex;align-items:center;gap:3px;padding:5px 0 5px 10px;border:0;background:transparent;color:var(--muted);font-size:11px;cursor:pointer}
.about-toggle svg{width:15px;height:15px;transition:transform .3s cubic-bezier(.16,1,.3,1)}
.about-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.about-card{position:absolute;right:0;bottom:calc(100% + 13px);width:min(420px,calc(100vw - 36px));padding:19px 20px 17px;border-radius:22px;background:var(--paper);color:var(--ink);box-shadow:0 18px 48px rgba(22,24,20,.18),0 0 0 1px var(--line);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(14px) scale(.985);transform-origin:bottom right;transition:opacity .24s,visibility .24s,transform .42s cubic-bezier(.16,1,.3,1);z-index:12}
.about-card.open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0) scale(1)}
.about-card-heading{display:flex;align-items:center;justify-content:space-between}
.about-card-heading h2{margin:0;font-size:14px;font-weight:600;letter-spacing:-.02em}
.about-card-heading button{width:28px;height:28px;display:grid;place-items:center;border:0;border-radius:9px;background:var(--surface);color:var(--muted);cursor:pointer}
.about-card-heading button svg{width:15px;height:15px}
.about-card p{margin:11px 0 14px;color:var(--muted);font-size:12px;line-height:1.75}
.about-byline{color:var(--accent);font-family:var(--mono);font-size:9px;letter-spacing:.035em}
[data-theme="dark"] .question-card{box-shadow:var(--shadow),0 0 0 1px rgba(233,238,227,.04),0 0 0 5px rgba(28,32,29,.72)}
@media(max-width:640px){
  .quiz-layout{margin:clamp(14px,2.6vh,28px) auto auto}
  .question-navigation{margin-top:11px;min-height:34px}
  .nav-button{font-size:11px}
  .nav-button svg{width:18px;height:18px}
  .site-footer{margin-top:auto;padding-top:10px;padding-bottom:2px}
  .about-card{bottom:calc(100% + 12px);padding:17px 18px 15px}
}
@media(prefers-reduced-motion:reduce){.about-card,.about-toggle svg,.nav-button{transition-duration:.01ms!important}}