:root{--bg:#f4f5f9;--card:#fff;--text:#1d2330;--muted:#667085;--line:#e2e5ee;--primary:#3b5bdb;--primary-strong:#2f4ac0;--primary-soft:#eef2ff;--ok:#2b8a3e;--ok-soft:#ebfbee;--ng:#c92a2a;--ng-soft:#fff0f0;--warn:#b35c00;--warn-soft:#fff4e0;--shadow:0 1px 2px #1018280f, 0 4px 16px #1018280d;--radius:14px;color:var(--text);background:var(--bg);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;-webkit-text-size-adjust:100%;font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,system-ui,sans-serif;font-size:16px;line-height:1.75}:root[data-theme=dark]{--bg:#111319;--card:#1b1e27;--text:#e7e9f0;--muted:#9aa3b5;--line:#2c3040;--primary:#7b93f5;--primary-strong:#93a7f8;--primary-soft:#232a45;--ok:#69db7c;--ok-soft:#16301c;--ng:#ff8787;--ng-soft:#3a1b1b;--warn:#ffc078;--warn-soft:#3a2a12;--shadow:0 1px 2px #0006;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);margin:0}h1,h2,h3,p,dl,dd,figure,fieldset{margin:0;padding:0}fieldset{border:0}a{color:var(--primary)}.page{outline:none;max-width:860px;margin:0 auto;padding:24px 16px 56px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:18px;padding:22px 24px}.muted{color:var(--muted);font-size:.9rem}.loading{color:var(--muted);text-align:center;padding:48px 0}.alert{background:var(--ng-soft);color:var(--ng);border:1px solid var(--ng);border-radius:10px;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;padding:10px 14px;font-size:.92rem;display:flex}.tag{background:var(--primary-soft);color:var(--primary-strong);white-space:nowrap;border-radius:999px;padding:5px 9px;font-size:.74rem;font-weight:600;line-height:1;display:inline-block}.tag-warn{background:var(--warn-soft);color:var(--warn)}.kbd{border:1px solid var(--line);text-align:center;min-width:1.6em;color:var(--muted);background:var(--bg);border-radius:6px;padding:1px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.7rem;line-height:1.5;display:inline-block}.btn{appearance:none;font:inherit;cursor:pointer;border:1px solid #0000;border-radius:10px;padding:10px 20px;font-weight:600;line-height:1.4;transition:background .12s,border-color .12s,transform 50ms}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:focus-visible,.choice:focus-visible,input:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-strong)}[data-theme=dark] .btn-primary{color:#10131c}.btn-ghost{border-color:var(--line);color:var(--text);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--primary-soft)}.btn-small{background:var(--card);border-color:var(--line);color:var(--text);padding:6px 12px;font-size:.85rem}.btn-large{align-items:center;gap:12px;padding:14px 34px;font-size:1.05rem;display:inline-flex}.btn-large .kbd{color:inherit;opacity:.85;background:0 0;border-color:#ffffff80}.btn-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.btn-row.center{justify-content:center}.banner{z-index:20;background:var(--card);border-bottom:1px solid var(--line);position:relative}.banner-inner{justify-content:space-between;align-items:center;gap:12px;max-width:860px;margin:0 auto;padding:8px 16px;display:flex}.banner-title{letter-spacing:.01em;white-space:nowrap;text-overflow:ellipsis;min-width:0;font-size:clamp(.92rem,4vw,1.12rem);line-height:1.4;overflow:hidden}.banner-title a{color:inherit;text-decoration:none}.menu-wrap{flex-shrink:0;position:relative}.menu-btn{appearance:none;border:1px solid var(--line);background:var(--card);width:40px;height:40px;color:var(--text);cursor:pointer;border-radius:10px;place-items:center;display:grid}.menu-btn:hover,.menu-btn[aria-expanded=true]{background:var(--primary-soft)}.menu-icon{gap:4px;width:18px;display:grid}.menu-icon i{background:currentColor;border-radius:2px;height:2px;display:block}.menu{background:var(--card);border:1px solid var(--line);border-radius:12px;width:max-content;min-width:230px;max-width:calc(100vw - 32px);padding:6px;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 8px 28px #1018282e}.menu-status{border-bottom:1px solid var(--line);color:var(--muted);overflow-wrap:anywhere;margin-bottom:6px;padding:6px 12px 10px;font-size:.82rem}.menu-status strong{color:var(--text)}.menu-item{appearance:none;width:100%;color:var(--text);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:10px 12px;font-size:.95rem;display:block}.menu-item:hover{background:var(--primary-soft)}.menu-btn:focus-visible,.menu-item:focus-visible,.notice-close:focus-visible,.modal-close:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}.app-notice{max-width:860px;margin:14px auto 0;padding:0 16px}.app-notice>div{border-radius:10px;align-items:center;gap:10px;padding:8px 8px 8px 14px;font-size:.9rem;display:flex}.app-notice.ok>div{background:var(--ok-soft);color:var(--ok)}.app-notice.warn>div{background:var(--warn-soft);color:var(--warn)}.app-notice p{flex:1}.app-notice .btn{flex-shrink:0}.notice-close{appearance:none;width:32px;height:32px;color:inherit;cursor:pointer;background:0 0;border:0;border-radius:8px;flex-shrink:0;font-size:1.3rem;line-height:1}.hero-sub{color:var(--muted);padding:0 4px 18px}.mode-head{align-items:center;gap:10px;margin-bottom:4px;display:flex}.mode-card h2,.stats-card h2{font-size:1.15rem}.mode-desc{color:var(--muted);margin-bottom:16px;font-size:.92rem}.resume-box{background:var(--primary-soft);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-bottom:14px;padding:14px 16px;display:flex}.resume-box.done{background:var(--ok-soft)}.resume-title{font-weight:700}.resume-meta{color:var(--muted);font-size:.88rem}.order-set legend{color:var(--muted);margin-bottom:8px;font-size:.85rem;font-weight:700}.order-set{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-bottom:16px;display:grid}.order-option{border:1.5px solid var(--line);cursor:pointer;border-radius:10px;grid-template-columns:auto 1fr;align-items:center;column-gap:8px;padding:10px 12px;display:grid}.order-option.selected{border-color:var(--primary);background:var(--primary-soft)}.order-option input{accent-color:var(--primary);margin:0}.order-label{font-weight:600}.order-hint{color:var(--muted);grid-column:2;font-size:.78rem;line-height:1.5}.warn{background:var(--warn-soft);color:var(--warn);border-radius:8px;margin-bottom:14px;padding:8px 12px;font-size:.86rem}.stat-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px;display:grid}.stat-grid>div{background:var(--bg);text-align:center;border-radius:10px;padding:12px 8px}.stat-grid dt{color:var(--muted);font-size:.78rem}.stat-grid dd{font-variant-numeric:tabular-nums;font-size:1.5rem;font-weight:700;line-height:1.4}.footer{color:var(--muted);padding:8px 4px 0;font-size:.78rem;line-height:1.7}.footer p+p{margin-top:4px}.statsbar{z-index:10;background:color-mix(in srgb, var(--card) 92%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0}.statsbar-inner{align-items:center;gap:12px;max-width:860px;margin:0 auto;padding:8px 16px;display:flex}.mode-badge{background:var(--primary-soft);color:var(--primary-strong);white-space:nowrap;border-radius:999px;padding:4px 10px;font-size:.78rem;font-weight:700}.mode-badge.review{background:var(--warn-soft);color:var(--warn)}.stats{gap:20px;margin-left:auto;display:flex}.stat{text-align:right;line-height:1.25}.stat dt{color:var(--muted);white-space:nowrap;font-size:.68rem}.stat dd{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:1.12rem;font-weight:700}.stat small{color:var(--muted);font-size:.72rem;font-weight:500}.progress{background:var(--line);height:3px}.progress-fill{background:var(--primary);height:100%;transition:width .3s}.quiz-page{padding-top:18px}.q-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px 12px;margin-bottom:14px;font-size:.86rem;display:flex}.q-no{color:var(--text);font-size:1.02rem;font-weight:700}.q-no small{color:var(--muted);font-size:.8rem;font-weight:500}.streak{align-items:center;gap:5px;margin-left:auto;font-size:.78rem;display:inline-flex}.streak i{border:2px solid var(--ok);border-radius:50%;width:11px;height:11px}.streak i.on{background:var(--ok)}.q-text{white-space:pre-wrap;overflow-wrap:anywhere;font-size:1.06rem;line-height:1.9}.q-figure{border:1px solid var(--line);text-align:center;background:#fff;border-radius:10px;margin-top:16px;padding:12px;overflow-x:auto}.q-figure a{line-height:0;display:inline-block}.q-figure img{max-width:100%;height:auto}.choices{gap:10px;margin-top:20px;display:grid}.choices.compact{grid-template-columns:repeat(4,1fr)}.choice{text-align:left;width:100%;font:inherit;color:var(--text);background:var(--card);border:1.5px solid var(--line);cursor:pointer;border-radius:12px;align-items:flex-start;gap:12px;padding:12px 14px;line-height:1.7;transition:border-color .12s,background .12s;display:flex;position:relative}.choices.compact .choice{flex-wrap:wrap;justify-content:center;align-items:center;padding:14px 8px}.choice:hover:not(:disabled){border-color:var(--primary);background:var(--primary-soft)}.choice:disabled{cursor:default}.choice-label{background:var(--primary-soft);width:1.9em;height:1.9em;color:var(--primary-strong);border-radius:50%;flex-shrink:0;place-items:center;font-weight:700;line-height:1;display:inline-grid}.choice-text{overflow-wrap:anywhere;flex:1;padding-top:.1em}.choice>.kbd{align-self:center}.choice .mark{white-space:nowrap;flex-shrink:0;align-self:center;font-size:.78rem;font-weight:700}.choice.correct{border-color:var(--ok);background:var(--ok-soft)}.choice.correct .choice-label{background:var(--ok);color:#fff}.choice.correct .mark{color:var(--ok)}.choice.wrong{border-color:var(--ng);background:var(--ng-soft)}.choice.wrong .choice-label{background:var(--ng);color:#fff}.choice.wrong .mark{color:var(--ng)}.choice.dim{opacity:.6}[data-theme=dark] .choice.correct .choice-label,[data-theme=dark] .choice.wrong .choice-label{color:#10131c}.q-cite{color:var(--muted);text-align:right;margin-top:16px;font-size:.74rem}.hint{text-align:center;color:var(--muted);font-size:.82rem}.result{border-left-width:6px}.result.ok{border-left-color:var(--ok)}.result.ng{border-left-color:var(--ng)}.verdict{align-items:center;gap:14px;display:flex}.verdict-mark{border-radius:50%;place-items:center;width:52px;height:52px;font-size:1.9rem;font-weight:700;line-height:1;display:grid}.result.ok .verdict-mark{background:var(--ok-soft);color:var(--ok)}.result.ng .verdict-mark{background:var(--ng-soft);color:var(--ng)}.verdict-title{font-size:1.35rem;font-weight:700;line-height:1.3}.result.ok .verdict-title{color:var(--ok)}.result.ng .verdict-title{color:var(--ng)}.verdict-sub{color:var(--muted);font-size:.92rem}.verdict-sub strong{color:var(--text);margin:0 3px;font-size:1.1rem}.review-note{background:var(--warn-soft);color:var(--warn);border-radius:8px;margin-top:12px;padding:8px 12px;font-size:.86rem}.explanation{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}.explanation h3{letter-spacing:.1em;color:var(--muted);margin-bottom:8px;font-size:.82rem}.exp-summary{background:var(--primary-soft);border-radius:10px;padding:12px 14px;font-size:1.03rem;font-weight:700;line-height:1.8}.exp-reason{white-space:pre-wrap;overflow-wrap:anywhere;margin-top:12px}.exp-choices{gap:8px;margin:16px 0 0;padding:0;list-style:none;display:grid}.exp-choices li{background:var(--bg);border-radius:10px;align-items:flex-start;gap:10px;padding:8px 10px;font-size:.94rem;display:flex}.exp-choices li.correct{background:var(--ok-soft)}.exp-choices li.correct .choice-label{background:var(--ok);color:#fff}[data-theme=dark] .exp-choices li.correct .choice-label{color:#10131c}.exp-choices .choice-label{margin-top:.15em;font-size:.86rem}.exp-choice-text{font-weight:700;display:block}.next-bar{padding:12px 0 calc(12px + env(safe-area-inset-bottom));background:linear-gradient(to top, var(--bg) 65%, transparent);justify-content:center;display:flex;position:sticky;bottom:0}.end-card{text-align:center;padding:36px 24px}.end-kicker{color:var(--primary);letter-spacing:.08em;font-size:.86rem;font-weight:700}.end-card h2{margin-bottom:14px;font-size:1.4rem}.end-card .stat-grid{margin:18px 0 24px}.end-card .muted{margin-bottom:20px}@media (width<=600px){.card{border-radius:12px;padding:18px 16px}.statsbar-inner{gap:8px;padding:6px 12px}.mode-badge{display:none}.stats{gap:14px}.stat dd{font-size:1rem}.home-btn{padding:5px 9px}.choice>.kbd,.btn-large .kbd,.hint{display:none}.stat-grid dd{font-size:1.25rem}.choice .mark{font-size:.72rem}}.modal{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);width:min(460px,100vw - 32px);max-height:calc(100dvh - 32px);color:var(--text);padding:0;overflow-y:auto;box-shadow:0 12px 40px #00000040}.modal::backdrop{background:#0a0c1480}.modal-body{padding:18px 22px 22px}.modal-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.modal-head h2{font-size:1.15rem}.modal-close{appearance:none;width:36px;height:36px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:8px;flex-shrink:0;font-size:1.5rem;line-height:1}.modal-close:hover{background:var(--primary-soft);color:var(--text)}.auth-tabs{background:var(--bg);border-radius:10px;gap:4px;margin-bottom:14px;padding:4px;display:flex}.auth-tab{appearance:none;font:inherit;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:8px;flex:1;padding:7px 10px;font-size:.92rem;font-weight:600}.auth-tab.selected{background:var(--card);color:var(--text);box-shadow:var(--shadow)}.auth-tab:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}.auth-field{margin-bottom:12px;font-size:.86rem;font-weight:600;display:block}.auth-field input{border:1px solid var(--line);background:var(--card);width:100%;color:var(--text);font:inherit;border-radius:8px;margin-top:4px;padding:9px 11px;font-size:1rem;font-weight:400;display:block}.auth-field small{color:var(--muted);margin-top:3px;font-weight:400;display:block}.auth-note{color:var(--muted);margin-bottom:12px;font-size:.84rem}.auth-error{background:var(--ng-soft);color:var(--ng);border-radius:8px;margin-bottom:12px;padding:8px 12px;font-size:.88rem}