:root{--brand-h: 264.665;--brand-50: oklch(.971 .013 var(--brand-h));--brand-100: oklch(.939 .021 var(--brand-h));--brand-200: oklch(.886 .031 var(--brand-h));--brand-300: oklch(.806 .043 var(--brand-h));--brand-400: oklch(.704 .051 var(--brand-h));--brand-500: oklch(.585 .055 var(--brand-h));--brand-600: oklch(.488 .052 var(--brand-h));--brand-700: oklch(.404 .046 var(--brand-h));--brand-800: oklch(.302 .04 var(--brand-h));--brand-900: oklch(.21 .034 var(--brand-h));--brand-950: oklch(.16 .028 var(--brand-h));--n-0: oklch(1 0 0);--n-50: oklch(.985 .003 75);--n-100: oklch(.967 .004 75);--n-200: oklch(.925 .005 75);--n-300: oklch(.872 .006 75);--n-400: oklch(.715 .009 75);--n-500: oklch(.556 .01 75);--n-600: oklch(.452 .011 75);--n-700: oklch(.372 .01 75);--n-800: oklch(.272 .009 70);--n-900: oklch(.205 .01 268);--n-950: oklch(.15 .012 268);--success-500: oklch(.64 .15 150);--success-600: oklch(.56 .14 150);--success-050: oklch(.965 .03 150);--success-150: oklch(.91 .055 150);--error-500: oklch(.605 .205 18);--error-600: oklch(.54 .2 18);--error-050: oklch(.967 .02 18);--error-150: oklch(.915 .045 18);--warning-500: oklch(.76 .15 75);--warning-600: oklch(.68 .14 70);--warning-050: oklch(.97 .035 80);--warning-150: oklch(.92 .07 80);--r-xs: 8px;--r-sm: 11px;--r-md: 14px;--r-lg: 18px;--r-xl: 24px;--r-2xl: 30px;--r-full: 999px;--s-1: 4px;--s-2: 8px;--s-3: 12px;--s-4: 16px;--s-5: 20px;--s-6: 24px;--s-7: 32px;--s-8: 40px;--s-9: 48px;--s-10: 64px;--font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;--fw-regular: 400;--fw-medium: 500;--fw-semibold: 600;--fw-bold: 700;--fw-extrabold: 800;--motion-fast: .13s;--motion: .22s;--ease: cubic-bezier(.22, .61, .36, 1)}:root,[data-theme=light]{color-scheme:light;--bg: var(--n-0);--bg-grad-1: var(--n-0);--bg-grad-2: var(--n-0);--surface: var(--n-0);--surface-2: var(--n-50);--surface-inset: var(--n-50);--border: var(--n-200);--border-strong: var(--n-300);--text-strong: var(--brand-900);--text: var(--n-800);--text-muted: var(--n-600);--text-subtle: var(--n-500);--text-faint: var(--n-400);--primary: var(--brand-900);--primary-hover: var(--brand-800);--primary-active: var(--brand-950);--primary-text: var(--n-0);--on-brand: var(--n-0);--on-brand-muted: oklch(.806 .043 var(--brand-h));--ring: oklch(.585 .055 var(--brand-h));--success: var(--success-600);--success-bg: var(--success-050);--success-border: var(--success-150);--error: var(--error-600);--error-bg: var(--error-050);--error-border: var(--error-150);--warning: var(--warning-600);--warning-bg: var(--warning-050);--warning-border: var(--warning-150);--shadow-sm: 0 1px 2px oklch(.21 .034 var(--brand-h) / .06);--shadow-md: 0 6px 20px -6px oklch(.21 .034 var(--brand-h) / .12), 0 2px 6px -2px oklch(.21 .034 var(--brand-h) / .08);--shadow-lg: 0 24px 60px -18px oklch(.21 .034 var(--brand-h) / .22), 0 8px 22px -10px oklch(.21 .034 var(--brand-h) / .12);--shadow-card: 0 1px 0 oklch(1 0 0 / .6) inset, var(--shadow-lg)}[data-theme=dark]{color-scheme:dark;--bg: var(--brand-950);--bg-grad-1: oklch(.18 .03 var(--brand-h));--bg-grad-2: oklch(.14 .024 var(--brand-h));--surface: oklch(.232 .03 var(--brand-h));--surface-2: oklch(.27 .032 var(--brand-h));--surface-inset: oklch(.2 .028 var(--brand-h));--border: oklch(.33 .03 var(--brand-h));--border-strong: oklch(.42 .034 var(--brand-h));--text-strong: var(--n-50);--text: oklch(.905 .012 var(--brand-h));--text-muted: oklch(.76 .02 var(--brand-h));--text-subtle: oklch(.64 .024 var(--brand-h));--text-faint: oklch(.54 .026 var(--brand-h));--primary: var(--brand-300);--primary-hover: var(--brand-200);--primary-active: var(--brand-400);--primary-text: var(--brand-950);--on-brand: var(--brand-950);--on-brand-muted: oklch(.404 .046 var(--brand-h));--ring: var(--brand-300);--success: oklch(.76 .14 150);--success-bg: oklch(.3 .06 150);--success-border: oklch(.42 .09 150);--error: oklch(.74 .15 20);--error-bg: oklch(.32 .08 20);--error-border: oklch(.45 .12 20);--warning: oklch(.82 .13 80);--warning-bg: oklch(.33 .06 80);--warning-border: oklch(.47 .09 80);--shadow-sm: 0 1px 2px oklch(0 0 0 / .4);--shadow-md: 0 8px 24px -8px oklch(0 0 0 / .55);--shadow-lg: 0 30px 70px -20px oklch(0 0 0 / .7), 0 10px 26px -12px oklch(0 0 0 / .5);--shadow-card: 0 1px 0 oklch(1 0 0 / .04) inset, var(--shadow-lg)}.form-card{width:100%;max-width:416px;margin-inline:auto;display:flex;flex-direction:column}.form-card__brandmark{display:none;justify-content:center;margin-bottom:var(--s-6)}.form-head{margin-bottom:var(--s-7)}.form-head h2{margin:0 0 6px;font-size:26px;line-height:1.15;letter-spacing:-.02em;font-weight:var(--fw-bold);color:var(--text-strong)}.form-head p{margin:0;color:var(--text-muted);font-size:15px;line-height:1.5}.sep{display:flex;align-items:center;gap:var(--s-4);margin:var(--s-6) 0}.sep:before,.sep:after{content:"";height:1px;flex:1;background:var(--border)}.sep span{font-size:12px;font-weight:var(--fw-semibold);color:var(--text-faint);letter-spacing:.08em;text-transform:uppercase}.field__labellink{font-size:13px;font-weight:var(--fw-semibold);color:var(--text-strong);text-decoration:none;border-radius:4px}.field__labellink:hover{text-decoration:underline}.form-card app-form-field+app-form-field{margin-top:var(--s-5)}.form-remember{margin-top:var(--s-5)}.form-actions{margin-top:var(--s-6)}.form-altrow{margin-top:var(--s-6);text-align:center;font-size:14px;color:var(--text-muted)}.form-altrow a,.link{color:var(--text-strong);font-weight:var(--fw-semibold);text-decoration:none;border-radius:4px}.form-altrow a:hover,.link:hover{text-decoration:underline}.form-foot{margin-top:var(--s-7);text-align:center;font-size:12px;color:var(--text-faint)}.back-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:var(--fw-semibold);color:var(--text-muted);text-decoration:none;margin-bottom:var(--s-6);transition:color var(--motion-fast)}.back-link:hover{color:var(--text-strong)}.center-head{text-align:center}.center-head app-medallion{margin-inline:auto}.center-head h2{margin:0 0 8px;font-size:24px;font-weight:var(--fw-bold);letter-spacing:-.02em;color:var(--text-strong)}.center-head p{margin:0 auto;color:var(--text-muted);font-size:14.5px;line-height:1.55;max-width:36ch}.center-head strong{color:var(--text-strong);font-weight:var(--fw-semibold)}.center-action{margin-top:var(--s-7)}.resend-row{margin-top:var(--s-6);text-align:center;font-size:13.5px;color:var(--text-muted)}.resend-row .countdown{color:var(--text-faint)}@media(prefers-reduced-motion:no-preference){.screen-enter{animation:screen-enter var(--motion) var(--ease)}@keyframes screen-enter{0%{transform:translateY(6px)}to{transform:translateY(0)}}}@media(max-width:900px){.form-card__brandmark{display:flex}}:root,[data-theme=light]{--nav-answered-bg: oklch(.939 .021 var(--brand-h));--nav-answered-border: oklch(.806 .043 var(--brand-h));--nav-answered-text: var(--brand-900);--opt-key-bg: var(--surface-inset)}[data-theme=dark]{--nav-answered-bg: oklch(.33 .034 var(--brand-h));--nav-answered-border: oklch(.47 .04 var(--brand-h));--nav-answered-text: var(--n-50);--opt-key-bg: oklch(.3 .03 var(--brand-h))}.app{display:flex;flex-direction:column;height:100dvh;min-height:0;font-family:var(--font-sans);color:var(--text);background:var(--bg)}.app__scroll{flex:1;min-height:0;overflow-y:auto}.qbtn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font:inherit;font-size:14.5px;font-weight:600;letter-spacing:.005em;padding:12px 20px;border-radius:var(--r-md);border:1.5px solid transparent;cursor:pointer;-webkit-user-select:none;user-select:none;transition:transform var(--motion-fast) var(--ease),background var(--motion-fast),border-color var(--motion-fast),color var(--motion-fast),box-shadow var(--motion-fast);white-space:nowrap}.qbtn:active:not(:disabled){transform:translateY(1px)}.qbtn:focus-visible{outline:2.5px solid var(--ring);outline-offset:2px}.qbtn:disabled{opacity:.5;cursor:not-allowed}.qbtn--primary{background:var(--primary);color:var(--primary-text);box-shadow:var(--shadow-md)}.qbtn--primary:hover:not(:disabled){background:var(--primary-hover)}.qbtn--secondary{background:var(--surface);color:var(--text-strong);border-color:var(--border-strong)}.qbtn--secondary:hover:not(:disabled){background:var(--surface-inset);border-color:var(--text-faint)}.qbtn--ghost{background:transparent;color:var(--text-muted)}.qbtn--ghost:hover:not(:disabled){background:var(--surface-inset);color:var(--text-strong)}.qbtn--danger{background:var(--error);color:#fff}.qbtn--danger:hover:not(:disabled){filter:brightness(1.05)}.qbtn--lg{padding:15px 26px;font-size:16px}.qbtn--block{width:100%}.icon-pill{display:grid;place-items:center;align-items:center;justify-content:center;width:40px;height:40px;flex:none;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--surface);color:var(--text-muted);cursor:pointer;transition:background var(--motion-fast),color var(--motion-fast),border-color var(--motion-fast)}.icon-pill:hover{background:var(--surface-inset);color:var(--text-strong)}.icon-pill:focus-visible{outline:2.5px solid var(--ring);outline-offset:2px}.icon-pill--on{background:var(--warning-bg);border-color:var(--warning-border);color:var(--warning)}.chip{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;font-size:12.5px;font-weight:600;color:var(--text-muted);background:var(--surface-inset);border:1px solid var(--border);border-radius:var(--r-full);padding:6px 12px}.chip svg{opacity:.8}.chip--brand{background:var(--nav-answered-bg);border-color:var(--nav-answered-border);color:var(--nav-answered-text)}.qh{flex:none;padding:16px 24px 0;border-bottom:1px solid var(--border);background:var(--surface)}.qh__row{display:flex;align-items:center;gap:14px}.qh__counts{display:flex;flex-direction:column;gap:2px;min-width:0}.qh__count{font-size:15px;font-weight:700;color:var(--text-strong);letter-spacing:-.01em}.qh__sub{font-size:12.5px;color:var(--text-muted);font-weight:500}.qh__spacer{flex:1}.qh__tools{display:flex;align-items:center;gap:8px}.qh__progress{margin:14px 0 0}.qh__track{height:6px;border-radius:var(--r-full);background:var(--surface-inset);overflow:hidden;transform:translateY(1px)}.qh__track i{display:block;height:100%;border-radius:var(--r-full);background:var(--primary);transition:width var(--motion) var(--ease)}.timer{display:inline-flex;flex-direction:column;align-items:stretch;gap:5px;padding:7px 14px 8px;border-radius:var(--r-md);background:var(--surface-inset);border:1px solid var(--border);min-width:116px}.timer__row{display:flex;align-items:center;justify-content:center;gap:7px}.timer__val{font-variant-numeric:tabular-nums;font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--text-strong)}.timer__bar{height:4px;border-radius:var(--r-full);background:var(--border);overflow:hidden}.timer__bar i{display:block;height:100%;border-radius:var(--r-full);background:var(--text-faint);transition:width 1s linear}.timer svg{color:var(--text-subtle)}.timer--alert{background:var(--error-bg);border-color:var(--error-border);animation:timer-pulse 1.6s var(--ease) infinite}.timer--alert .timer__val,.timer--alert svg{color:var(--error)}.timer--alert .timer__bar i{background:var(--error)}@media(prefers-reduced-motion:no-preference){@keyframes timer-pulse{0%,to{box-shadow:0 0 color-mix(in oklch,var(--error) 30%,transparent)}50%{box-shadow:0 0 0 5px transparent}}}.qbody{flex:1;min-height:0;display:flex}.qmain{flex:1;min-width:0;display:flex;flex-direction:column}.qscroll{flex:1;min-height:0;overflow-y:auto;scrollbar-gutter:stable}.qcontent{max-width:760px;margin:0 auto;padding:32px 32px 28px;width:100%}.qmeta{display:flex;align-items:center;gap:10px;margin-bottom:18px;flex-wrap:wrap}.qkind{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-faint)}.qtext{font-size:22px;line-height:1.42;font-weight:700;letter-spacing:-.01em;color:var(--text-strong);margin:0 0 24px;text-wrap:pretty}.opts{display:flex;flex-direction:column;gap:12px}.opt{display:flex;align-items:center;gap:15px;width:100%;text-align:left;padding:16px 18px;border-radius:var(--r-md);border:1.5px solid var(--border);background:var(--surface);cursor:pointer;font:inherit;transition:border-color var(--motion-fast) var(--ease),background var(--motion-fast),box-shadow var(--motion-fast),transform var(--motion-fast)}.opt:hover:not(:disabled):not(.opt--locked){border-color:var(--border-strong);background:var(--surface-2)}.opt:active:not(:disabled):not(.opt--locked){transform:translateY(1px)}.opt:focus-visible{outline:2.5px solid var(--ring);outline-offset:2px}.opt:disabled,.opt--locked{cursor:default}.opt__key{width:36px;height:36px;flex:none;border-radius:11px;display:grid;place-items:center;font-size:15px;font-weight:700;background:var(--opt-key-bg);color:var(--text-strong);border:1px solid var(--border);transition:all var(--motion-fast) var(--ease)}.opt__key--multi{border-radius:9px}.opt__text{flex:1;font-size:15.5px;line-height:1.4;color:var(--text-strong)}.opt__mark{flex:none;display:grid;place-items:center;opacity:0;transition:opacity var(--motion-fast);color:var(--text-faint)}.opt__tag{flex:none;font-size:11.5px;font-weight:700;color:var(--success);white-space:nowrap}.opt--selected{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in oklch,var(--ring) 18%,transparent)}.opt--selected .opt__key{background:var(--primary);color:var(--primary-text);border-color:transparent}.opt--selected .opt__mark{opacity:1;color:var(--primary)}.opt--correct{border-color:var(--success-border);background:var(--success-bg)}.opt--correct .opt__key{background:var(--success);color:#fff;border-color:transparent}.opt--correct .opt__mark{opacity:1;color:var(--success)}.opt--correct .opt__text{color:var(--text-strong)}.opt--wrong{border-color:var(--error-border);background:var(--error-bg)}.opt--wrong .opt__key{background:var(--error);color:#fff;border-color:transparent}.opt--wrong .opt__mark{opacity:1;color:var(--error)}.opt--correct-muted{border-color:var(--success-border);background:transparent}.opt--correct-muted .opt__key{color:var(--success);border-color:var(--success-border);background:transparent}.opt--correct-muted .opt__mark{opacity:1;color:var(--success)}.fb{margin-top:20px;border-radius:var(--r-md);padding:16px 18px;border:1px solid;animation:fb-in var(--motion) var(--ease) both}@media(prefers-reduced-motion:no-preference){@keyframes fb-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}}.fb--correct{background:var(--success-bg);border-color:var(--success-border)}.fb--wrong{background:var(--error-bg);border-color:var(--error-border)}.fb__head{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15px}.fb--correct .fb__head{color:var(--success)}.fb--wrong .fb__head{color:var(--error)}.fb__expl{margin-top:9px;font-size:14.5px;line-height:1.55;color:var(--text)}.fb__foot{margin-top:12px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.fb__tag{font-size:11.5px;font-weight:600;color:var(--text-muted);background:var(--surface);border:1px solid var(--border);border-radius:var(--r-full);padding:4px 10px}.multi-hint{margin-top:14px;font-size:13px;color:var(--text-subtle);display:flex;align-items:center;gap:7px}.qf{flex:none;display:flex;align-items:center;gap:10px;padding:16px 24px;border-top:1px solid var(--border);background:var(--surface)}.qf__spacer{flex:1}.qnav{flex:none;width:312px;border-left:1px solid var(--border);background:var(--surface);display:flex;flex-direction:column;min-height:0}.qnav__head{padding:18px 20px 14px;border-bottom:1px solid var(--border)}.qnav__title{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700;color:var(--text-strong)}.qnav__title .qnav__close{display:none}.qnav__legend{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:13px}.lg{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;color:var(--text-muted);font-weight:500}.lg__sw{width:15px;height:15px;border-radius:5px;border:1.5px solid var(--border);background:var(--surface);flex:none}.lg__sw--answered{background:var(--nav-answered-bg);border-color:var(--nav-answered-border)}.lg__sw--current{border-color:var(--primary);box-shadow:0 0 0 2px color-mix(in oklch,var(--ring) 35%,transparent)}.qnav__scroll{flex:1;min-height:0;overflow-y:auto;padding:16px 20px 20px}.qnav__group+.qnav__group{margin-top:18px}.qnav__grouphead{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-bottom:10px}.qnav__grouptitle{font-size:12px;font-weight:700;color:var(--text);white-space:nowrap;display:inline-flex;align-items:center}.qnav__grouprange{font-size:11px;color:var(--text-faint);font-weight:600;white-space:nowrap}.qnav__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.cell{position:relative;aspect-ratio:1;border-radius:10px;border:1.5px solid var(--border);background:var(--surface);color:var(--text-muted);font:inherit;font-size:13px;font-weight:700;cursor:pointer;display:grid;place-items:center;transition:border-color var(--motion-fast),background var(--motion-fast),color var(--motion-fast),transform var(--motion-fast)}.cell:hover{transform:translateY(-1px);border-color:var(--border-strong)}.cell:focus-visible{outline:2.5px solid var(--ring);outline-offset:2px}.cell--answered{background:var(--nav-answered-bg);border-color:var(--nav-answered-border);color:var(--nav-answered-text)}.cell--current{border-color:var(--primary);box-shadow:0 0 0 2px color-mix(in oklch,var(--ring) 35%,transparent);color:var(--text-strong)}.cell--correct{background:var(--success-bg);border-color:var(--success-border);color:var(--success)}.cell--wrong{background:var(--error-bg);border-color:var(--error-border);color:var(--error)}.cell--skipped{background:var(--surface);border-color:var(--border);color:var(--text-faint)}.qnav__foot{padding:14px 20px;border-top:1px solid var(--border)}.qnav__stat{display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-muted)}.qnav__stat b{color:var(--text-strong);font-weight:700}.qnav-overlay{position:absolute;inset:0;z-index:50;background:#00000073;display:none;opacity:0;transition:opacity var(--motion)}.qnav-overlay--open{display:block;opacity:1}.screen{min-height:100dvh;display:flex;flex-direction:column;background:var(--bg)}.screen__bar{flex:none;display:flex;align-items:center;gap:12px;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--surface)}.screen__bar .qh__spacer{flex:1}.screen__body{flex:1;overflow-y:auto;scrollbar-gutter:stable}.wrap{max-width:760px;margin:0 auto;padding:40px 32px 48px;width:100%}.wrap--narrow{max-width:560px}.wrap--wide{max-width:880px}.lede{margin-bottom:32px}.lede h1{margin:0 0 8px;font-size:30px;font-weight:800;letter-spacing:-.025em;color:var(--text-strong)}.lede p{margin:0;font-size:15.5px;line-height:1.55;color:var(--text-muted);max-width:52ch}.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);margin-bottom:14px}.modes{display:grid;grid-template-columns:1fr 1fr;gap:18px}.mode{text-align:left;cursor:pointer;font:inherit;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r-lg);padding:26px;display:flex;flex-direction:column;gap:14px;transition:border-color var(--motion-fast),box-shadow var(--motion-fast),transform var(--motion-fast)}.mode:hover{border-color:var(--border-strong);box-shadow:var(--shadow-md);transform:translateY(-2px)}.mode:focus-visible{outline:2.5px solid var(--ring);outline-offset:2px}.mode__icon{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;background:var(--nav-answered-bg);color:var(--nav-answered-text)}.mode__icon--exam{background:var(--brand-900);color:#fff}[data-theme=dark] .mode__icon--exam{background:var(--brand-300);color:var(--brand-950)}.mode h3{margin:0;font-size:19px;font-weight:700;letter-spacing:-.01em;color:var(--text-strong)}.mode p{margin:0;font-size:14px;line-height:1.5;color:var(--text-muted)}.mode__meta{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap}.resume{display:flex;align-items:center;gap:16px;padding:18px 20px;margin-bottom:28px;border:1.5px solid var(--nav-answered-border);border-radius:var(--r-lg);background:var(--nav-answered-bg)}.resume__icon{width:44px;height:44px;border-radius:12px;flex:none;display:grid;place-items:center;background:var(--surface);color:var(--primary);border:1px solid var(--border)}.resume__body{flex:1;min-width:0}.resume__title{font-size:14.5px;font-weight:700;color:var(--text-strong)}.resume__meta{font-size:13px;color:var(--text-muted);margin-top:2px}.resume__mini{margin-top:8px;height:5px;border-radius:99px;background:color-mix(in oklch,var(--surface) 60%,transparent);overflow:hidden;max-width:220px}.resume__mini 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