:root{--c-primary: #1865f2;--c-primary-dark: #1450c4;--c-primary-soft: #e8f0fe;--c-primary-softer: #f3f7fe;--c-accent: #1ec9a5;--c-accent-soft: #e3f9f3;--c-bg: #fbfcfe;--c-surface: #ffffff;--c-surface-2: #f5f7fb;--c-surface-3: #eef1f7;--c-border: #e4e8f0;--c-border-strong: #d3d9e4;--c-text: #1f2530;--c-text-muted: #5a6473;--c-text-subtle: #8b94a4;--c-text-on-primary: #ffffff;--c-success: #0c8a4f;--c-success-soft: #e3f7ee;--c-success-border: #aee5cb;--c-danger: #d92d20;--c-danger-soft: #fdeceb;--c-danger-border: #f4b9b4;--c-warn: #c77700;--c-warn-soft: #fff4e0;--c-mastery-0: #ced4da;--c-mastery-1: #f59f00;--c-mastery-2: #15aabf;--c-mastery-3: #1865f2;--c-mastery-4: #7048e8;--sp-1: .25rem;--sp-2: .5rem;--sp-3: .75rem;--sp-4: 1rem;--sp-5: 1.5rem;--sp-6: 2rem;--sp-7: 2.5rem;--sp-8: 3.5rem;--r-sm: 8px;--r-md: 12px;--r-lg: 16px;--r-xl: 22px;--r-pill: 999px;--shadow-xs: 0 1px 2px rgba(20, 32, 60, .06);--shadow-sm: 0 1px 3px rgba(20, 32, 60, .08), 0 1px 2px rgba(20, 32, 60, .04);--shadow-md: 0 6px 16px rgba(20, 32, 60, .08), 0 2px 6px rgba(20, 32, 60, .05);--shadow-lg: 0 16px 40px rgba(20, 32, 60, .12), 0 6px 12px rgba(20, 32, 60, .06);--font-sans: "Inter", "Noto Sans Arabic", -apple-system, BlinkMacSystemFont, "Segoe UI", "Segoe UI Arabic", Tahoma, Roboto, Helvetica, Arial, sans-serif;--font-serif: "Georgia", "Times New Roman", serif;--fs-xs: .75rem;--fs-sm: .875rem;--fs-base: 1rem;--fs-md: 1.0625rem;--fs-lg: 1.25rem;--fs-xl: 1.5rem;--fs-2xl: 1.875rem;--fs-3xl: 2.375rem;--nav-h: 60px;--content-max: 1080px;--content-narrow: 760px;--ease: cubic-bezier(.4, 0, .2, 1);--dur: .16s}*,*:before,*:after{box-sizing:border-box}*{margin:0}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}html,body,#root{height:100%}body{font-family:var(--font-sans);font-size:var(--fs-base);line-height:1.55;color:var(--c-text);background:var(--c-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}#root{display:flex;flex-direction:column;min-height:100%}h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:-.01em;color:var(--c-text)}h1{font-size:var(--fs-2xl)}h2{font-size:var(--fs-xl)}h3{font-size:var(--fs-lg)}p{color:var(--c-text-muted)}a{color:var(--c-primary);text-decoration:none}a:hover{text-decoration:underline}img,svg{display:block;max-width:100%}button,input,select,textarea,option{font:inherit;color:inherit}button,select{cursor:pointer}ul{list-style:none;padding:0}:focus-visible{outline:3px solid var(--c-primary);outline-offset:2px;border-radius:var(--r-sm)}::selection{background:var(--c-primary-soft)}@keyframes dropdownPopIn{0%{opacity:0;transform:translateY(-4px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}*{scrollbar-width:thin;scrollbar-color:var(--c-border-strong) transparent}*::-webkit-scrollbar{width:10px;height:10px}*::-webkit-scrollbar-thumb{background:var(--c-border-strong);border-radius:var(--r-pill);border:3px solid var(--c-bg)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);padding:.625rem 1.125rem;border:1px solid transparent;border-radius:var(--r-pill);font-size:var(--fs-sm);font-weight:600;line-height:1.2;white-space:nowrap;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);-webkit-user-select:none;user-select:none}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--c-primary);color:var(--c-text-on-primary);box-shadow:var(--shadow-xs)}.btn--primary:hover:not(:disabled){background:var(--c-primary-dark)}.btn--success{background:var(--c-success);color:#fff}.btn--success:hover:not(:disabled){filter:brightness(.95)}.btn--secondary{background:var(--c-surface);border-color:var(--c-border-strong);color:var(--c-text)}.btn--secondary:hover:not(:disabled){background:var(--c-surface-2);border-color:var(--c-text-subtle)}.btn--ghost{background:transparent;color:var(--c-text-muted)}.btn--ghost:hover:not(:disabled){background:var(--c-surface-2);color:var(--c-text)}.btn--danger-ghost{background:transparent;border-color:var(--c-danger-border);color:var(--c-danger)}.btn--danger-ghost:hover:not(:disabled){background:var(--c-danger-soft)}.btn--lg{padding:.85rem 1.6rem;font-size:var(--fs-md)}.btn--block{width:100%}.card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}.card--pad{padding:var(--sp-5)}.badge{display:inline-flex;align-items:center;gap:var(--sp-1);padding:.2rem .6rem;border-radius:var(--r-pill);font-size:var(--fs-xs);font-weight:600;letter-spacing:.01em}.badge--soft{background:var(--c-primary-soft);color:var(--c-primary-dark)}.badge--coming{background:var(--c-surface-3);color:var(--c-text-subtle)}.badge--accent{background:var(--c-accent-soft);color:#0c7a63}.badge--novel{background:#f3eefe;color:#6741d9}.icon-tile{display:grid;place-items:center;flex-shrink:0;width:52px;height:52px;border-radius:var(--r-md);font-size:1.65rem;line-height:1;background:var(--tile-bg, var(--c-surface-2))}.icon-tile--sm{width:42px;height:42px;font-size:1.3rem;border-radius:var(--r-sm)}.icon-tile--lg{width:64px;height:64px;font-size:2rem}.prof{display:flex;flex-direction:column;gap:var(--sp-2)}.prof__track{position:relative;height:8px;border-radius:var(--r-pill);background:var(--c-surface-3);overflow:hidden}.prof__fill{position:absolute;inset-block:0;inset-inline-start:0;background:var(--prof-color, var(--c-primary));border-radius:var(--r-pill);transition:width .48s var(--ease)}.prof__divider{position:absolute;inset-block:0;width:3px;background:var(--c-surface);transform:translate(-50%)}.prof__meta{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);font-size:var(--fs-xs)}.prof__level{font-weight:700;color:var(--prof-color, var(--c-text-muted))}.prof__pct{color:var(--c-text-subtle);font-variant-numeric:tabular-nums}.chip{display:inline-flex;align-items:center;gap:var(--sp-2);padding:.3rem .7rem;border-radius:var(--r-pill);background:var(--c-surface-2);color:var(--c-text-muted);font-size:var(--fs-xs);font-weight:600}.question-blank{--blank-bg: #eaf2ff;--blank-border: #2563eb;--blank-text: #174ea6;display:inline-flex;align-items:center;justify-content:center;min-width:4.35em;max-width:100%;min-height:1.68em;margin:0 .14em;padding:.08em .58em .12em;border:1.5px solid var(--blank-border);border-radius:var(--r-sm);background:var(--blank-bg);color:var(--blank-text);font-weight:800;line-height:1.25;overflow-wrap:anywhere;text-align:center;vertical-align:-.14em;white-space:normal}.question-blank.is-filled{min-width:3.4em;color:var(--blank-text)}.blank-choice-parts{display:inline-flex;align-items:center;flex-wrap:wrap;gap:.28rem .34rem;vertical-align:middle}.blank-choice-fill{--blank-bg: #eaf2ff;--blank-border: #2563eb;--blank-text: #174ea6;display:inline-flex;align-items:center;max-width:100%;min-height:1.72rem;padding:.14rem .46rem;border:1px solid var(--blank-border);border-radius:var(--r-sm);background:var(--blank-bg);color:var(--blank-text);font-size:var(--fs-sm);font-weight:800;line-height:1.15;overflow-wrap:anywhere;white-space:normal}.question-blank--1,.blank-choice-fill.question-blank--1{--blank-bg: #eaf2ff;--blank-border: #2563eb;--blank-text: #174ea6}.question-blank--2,.blank-choice-fill.question-blank--2{--blank-bg: #f2edff;--blank-border: #7048e8;--blank-text: #5f3dc4}.question-blank--3,.blank-choice-fill.question-blank--3{--blank-bg: #fff6db;--blank-border: #b7791f;--blank-text: #8a5a12}.question-blank--4,.blank-choice-fill.question-blank--4{--blank-bg: #f1f5f9;--blank-border: #64748b;--blank-text: #475569}.blank-choice-separator{color:var(--c-text-subtle);font-weight:800;line-height:1}.stat{display:flex;flex-direction:column;gap:2px}.stat__value{font-size:var(--fs-xl);font-weight:800;color:var(--c-text);font-variant-numeric:tabular-nums;letter-spacing:-.02em}.stat__label{font-size:var(--fs-xs);color:var(--c-text-subtle);text-transform:uppercase;letter-spacing:.04em;font-weight:600}.spinner{width:28px;height:28px;border:3px solid var(--c-surface-3);border-top-color:var(--c-primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app{display:flex;flex-direction:column;min-height:100vh}.nav{position:sticky;top:0;z-index:50;min-height:var(--nav-h);padding-block:2px;background:#ffffffd9;-webkit-backdrop-filter:saturate(1.6) blur(10px);backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--c-border)}.nav__inner{min-height:calc(var(--nav-h) - 4px);max-width:var(--content-max);margin:0 auto;padding:0 var(--sp-5);display:flex;align-items:center;gap:var(--sp-4)}.nav__brand{display:inline-flex;align-items:center;gap:var(--sp-2);font-weight:800;font-size:var(--fs-lg);letter-spacing:-.02em;color:var(--c-text)}.nav__brand:hover{text-decoration:none}.nav__logo{width:30px;height:30px;border-radius:8px}.nav__course{display:inline-flex;align-items:center;gap:var(--sp-2);padding:.3rem .5rem .3rem .3rem;border-radius:var(--r-pill);border:1px solid var(--c-border);background:var(--c-surface);font-size:var(--fs-xs);font-weight:600;color:var(--c-text-muted)}.nav__course--plain{padding-inline:.55rem}.nav__course-dot{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:.85rem}.nav__spacer{flex:1}.nav__actions{display:flex;align-items:center;gap:var(--sp-2)}.nav__icon-btn{display:grid;place-items:center;width:38px;height:38px;border-radius:var(--r-pill);background:transparent;border:none;color:var(--c-text-muted);transition:background var(--dur) var(--ease)}.nav__icon-btn:hover{background:var(--c-surface-2);color:var(--c-text)}.nav__language{position:relative;display:inline-flex;align-items:center;gap:var(--sp-2);width:min(var(--dropdown-width, 128px),calc(100vw - var(--sp-6)));min-width:128px;height:38px;padding:0 var(--sp-4) 0 var(--sp-3);border:1px solid var(--c-border);border-radius:var(--r-pill);background:linear-gradient(180deg,#fff,var(--c-surface-2));color:var(--c-text-muted);box-shadow:var(--shadow-xs);cursor:pointer;touch-action:manipulation;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease)}.nav__language:after{content:"";width:7px;height:7px;margin-inline-start:auto;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-2px) rotate(45deg)}.nav__language:hover,.nav__language:focus-within{border-color:var(--c-primary);color:var(--c-text);box-shadow:var(--shadow-sm)}.nav__language-label{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:var(--fs-sm);font-weight:700}.nav__language-trigger{display:inline-flex;align-items:center;gap:var(--sp-2);flex:1;min-width:0;width:100%;height:100%;padding:0;border:0;background:transparent;color:inherit;font:inherit;text-align:start;transition:color .1s var(--ease),transform .1s var(--ease)}.nav__language-trigger:hover,.nav__language.is-open .nav__language-trigger{color:var(--c-primary-dark)}.nav__language-trigger:active{transform:translateY(1px)}.nav__language-menu{position:absolute;inset-block-start:calc(100% + var(--sp-2));inset-inline-end:0;z-index:80;width:max(100%,var(--dropdown-width, 128px));min-width:12rem;max-width:calc(100vw - var(--sp-6));padding:var(--sp-2);border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-surface);box-shadow:var(--shadow-lg);transform-origin:top right;animation:dropdownPopIn 115ms cubic-bezier(.2,.8,.25,1)}.nav__language-menu-option{position:relative;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);width:100%;min-height:36px;padding:.5rem .7rem;border:0;border-radius:var(--r-sm);background:transparent;color:var(--c-text);font-size:var(--fs-sm);font-weight:700;text-align:start;white-space:nowrap;touch-action:manipulation;transition:background-color 90ms var(--ease),box-shadow 90ms var(--ease),color 90ms var(--ease),transform 90ms var(--ease)}.nav__language-menu-option svg{flex-shrink:0;transform:scale(.9);transition:transform .1s var(--ease)}.nav__language-menu-option:hover:not(:disabled),.nav__language-menu-option.is-selected{background:var(--c-primary-softer);color:var(--c-primary-dark)}.nav__language-menu-option:hover:not(:disabled){transform:translateY(-1px)}.nav__language-menu-option:active:not(:disabled){transform:translateY(0) scale(.99)}.nav__language-menu-option.is-selected{box-shadow:none}.nav__language-menu-option.is-selected svg{transform:scale(1)}.nav__language-menu-option:disabled{cursor:not-allowed;opacity:.58}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.page{flex:1;width:100%;max-width:var(--content-max);margin:0 auto;padding:var(--sp-6) var(--sp-5) var(--sp-8)}.page--narrow{max-width:var(--content-narrow)}.page-head{margin-bottom:var(--sp-6)}.page-head__eyebrow{font-size:var(--fs-sm);font-weight:700;color:var(--c-primary);letter-spacing:.02em}.page-head h1{margin-top:var(--sp-2)}.page-head p{margin-top:var(--sp-3);max-width:60ch;font-size:var(--fs-md)}.crumb{display:inline-flex;align-items:center;gap:var(--sp-2);font-size:var(--fs-sm);font-weight:600;color:var(--c-text-muted);background:none;border:none;padding:var(--sp-2) 0;margin-bottom:var(--sp-3)}.crumb:hover{color:var(--c-text)}.crumb__chevron{display:inline-flex}[dir=rtl] .crumb__chevron{transform:scaleX(-1)}.grid{display:grid;gap:var(--sp-4)}.grid--subjects{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.grid--stats{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:var(--sp-3);margin:var(--sp-6) 0 var(--sp-3)}.section-head h2{font-size:var(--fs-lg)}.section-head__hint{font-size:var(--fs-sm);color:var(--c-text-subtle)}.foot{border-top:1px solid var(--c-border);padding:var(--sp-5);text-align:center;font-size:var(--fs-xs);color:var(--c-text-subtle)}.center-screen{flex:1;display:grid;place-items:center;padding:var(--sp-8);text-align:center}@media (max-width: 720px){.nav{min-height:64px;height:64px;padding-block:0}.nav__inner,.page{padding-inline:var(--sp-4)}.nav__inner{display:grid;grid-template-columns:minmax(84px,1fr) auto minmax(0,1fr);grid-template-rows:64px;align-items:center;column-gap:var(--sp-2);row-gap:0;min-height:64px;height:64px;padding-block:0;direction:ltr}.nav__brand{order:1;grid-column:2;grid-row:1;justify-content:center;direction:ltr}.nav__course{order:3;grid-column:3;grid-row:1;justify-self:end;min-width:0;max-width:min(100%,42vw);margin:0;padding:.3rem .65rem}[dir=rtl] .nav__course{direction:rtl}.nav__course-label{display:inline-block;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav__spacer{display:none}.nav__actions{order:2;grid-column:1;grid-row:1;align-self:center;justify-self:start;justify-content:flex-start;margin:0;padding:0;direction:ltr}.nav__language{min-width:44px;width:44px;height:44px;padding:0;justify-content:center}.nav__language-trigger{justify-content:center}.nav__language-menu{min-width:min(13.5rem,calc(100vw - var(--sp-6)))}.nav__language-menu-option{min-height:44px;padding-block:.65rem}.nav__language:after,.nav__language-label{display:none}[dir=ltr] .nav__course{grid-column:1;justify-self:start}[dir=ltr] .nav__actions{grid-column:3;justify-self:end}[dir=rtl] .nav__actions{flex-direction:row-reverse}[dir=rtl] .nav__language-menu{inset-inline-start:0;inset-inline-end:auto;transform-origin:top left}}@media (hover: none) and (pointer: coarse){.nav__language-trigger:active,.nav__language-menu-option:hover:not(:disabled),.nav__language-menu-option:active:not(:disabled){transform:none}}.landing{position:relative;width:100%;max-width:1200px;flex:0 0 auto;margin:0 auto;padding:var(--sp-5) var(--sp-5) var(--sp-8);overflow-x:clip;overflow-y:visible;isolation:isolate}.landing:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;background:linear-gradient(90deg,rgba(24,101,242,.06) 1px,transparent 1px),linear-gradient(180deg,rgba(24,101,242,.05) 1px,transparent 1px);background-size:54px 54px;-webkit-mask-image:linear-gradient(to bottom,#000 0,transparent 640px);mask-image:linear-gradient(to bottom,#000 0,transparent 640px);pointer-events:none}.landing-nav{position:sticky;top:var(--sp-3);z-index:10;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);margin-bottom:var(--sp-8);padding:var(--sp-2);border:1px solid rgba(228,232,240,.82);border-radius:var(--r-md);background:#ffffffc7;box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.landing-brand{display:inline-flex;align-items:center;gap:var(--sp-2);color:var(--c-text);font-size:var(--fs-lg);font-weight:800}.landing-brand:hover{text-decoration:none}.landing-brand img{width:34px;height:34px;border-radius:var(--r-sm);animation:landingLogoPulse 4.8s var(--ease) infinite}.landing-nav__links{display:flex;align-items:center;gap:var(--sp-3);font-size:var(--fs-sm);font-weight:700}.landing-nav__links a:not(.btn){position:relative;padding:.45rem .2rem;color:var(--c-text-muted)}.landing-nav__links a:not(.btn):after{content:"";position:absolute;inset-inline:0;bottom:.2rem;height:2px;border-radius:var(--r-pill);background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}.landing-nav__links a:not(.btn):hover{color:var(--c-text);text-decoration:none}.landing-nav__links a:not(.btn):hover:after{transform:scaleX(1)}[dir=rtl] .landing-nav__links a:not(.btn):after{transform-origin:right}.landing-language-links{display:inline-flex;align-items:center;gap:var(--sp-2);padding-inline:var(--sp-2);border-inline:1px solid var(--c-border)}.landing-language-links a{min-width:2.6rem;padding:.25rem .45rem;border-radius:var(--r-sm);text-align:center;white-space:nowrap}.landing-language-links a[aria-current=page]{background:var(--c-surface-2);color:var(--c-text)}.landing-hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.86fr);align-items:center;gap:var(--sp-8);min-height:min(680px,calc(100vh - 120px));padding-bottom:var(--sp-6)}.landing-hero:after{content:"";position:absolute;inset-inline:48% -18%;top:9%;height:68%;z-index:-1;border:1px solid rgba(24,101,242,.12);border-radius:48% 52% 44% 56%;background:radial-gradient(circle at 40% 42%,rgba(30,201,165,.18),transparent 34%),linear-gradient(135deg,#1865f21c,#fff0);animation:landingShapeDrift 12s var(--ease) infinite alternate}.landing-kicker{color:var(--c-primary);font-size:var(--fs-sm);font-weight:800;letter-spacing:0;text-transform:uppercase}.landing-hero h1,.landing-page-head h1{max-width:13ch;margin-top:var(--sp-3);font-size:var(--fs-3xl);letter-spacing:0}.landing-hero__sub,.landing-page-head p{max-width:62ch;margin-top:var(--sp-4);font-size:var(--fs-md)}.landing-hero__actions,.landing-cta__actions{display:flex;align-items:center;gap:var(--sp-3);flex-wrap:wrap;margin-top:var(--sp-6)}.landing-question-stack{position:relative;min-height:520px;perspective:1200px}.landing-question-stack__halo{position:absolute;top:8%;right:-3%;bottom:3%;left:8%;border:1px solid rgba(24,101,242,.14);border-radius:var(--r-md);background:repeating-linear-gradient(135deg,rgba(24,101,242,.08) 0 1px,transparent 1px 16px),linear-gradient(135deg,#1865f214,#1ec9a514);transform:rotate(2deg)}.landing-question-card{position:absolute;inset:7% 0 auto auto;box-sizing:border-box;width:min(100%,440px);min-height:430px;display:flex;flex-direction:column;padding:var(--sp-5);border:1px solid rgba(216,223,235,.92);border-radius:var(--r-md);background:#fff;box-shadow:0 24px 58px #0f172a24;transform-origin:center;backface-visibility:hidden;z-index:var(--stack-z);opacity:var(--stack-opacity);transform:translate3d(var(--stack-x),var(--stack-y),0) rotate(var(--stack-r)) scale(var(--stack-scale));text-rendering:geometricPrecision;will-change:transform,opacity;animation:landingQuestionShuffle 18s var(--ease) infinite;animation-delay:calc(var(--card-index) * -4.5s)}.landing-question-card__top{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);color:var(--c-text-muted);font-size:var(--fs-sm);font-weight:800}.landing-question-card__top span:last-child{padding:.28rem .55rem;border:1px solid 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640px){.auth-page{align-items:start;padding:calc(var(--sp-8) + 2rem) var(--sp-4) var(--sp-5)}.auth-page__topbar{inset-inline:var(--sp-4)}.auth-panel{padding:var(--sp-4);border-radius:var(--r-lg)}}.onb{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:calc(var(--sp-8) + 2.5rem) var(--sp-5) var(--sp-8);overflow-x:clip;overflow-y:visible;isolation:isolate}.onb:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;background:linear-gradient(90deg,rgba(24,101,242,.05) 1px,transparent 1px),linear-gradient(180deg,rgba(24,101,242,.045) 1px,transparent 1px),radial-gradient(circle at 18% 14%,rgba(30,201,165,.13),transparent 28%),radial-gradient(circle at 82% 18%,rgba(24,101,242,.12),transparent 30%),var(--c-bg);background-size:48px 48px,48px 48px,auto,auto,auto}.onb__topbar{position:fixed;inset-block-start:var(--sp-4);inset-inline:var(--sp-5);z-index:20;display:flex;justify-content:flex-end;pointer-events:none}.onb__language{pointer-events:auto;background:#ffffffeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.onb__shell{width:100%;max-width:640px;padding:var(--sp-6);border:1px solid rgba(228,232,240,.9);border-radius:var(--r-xl);background:#ffffffe0;box-shadow:var(--shadow-lg);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.onb__progress{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);margin-bottom:var(--sp-5);padding-bottom:var(--sp-4);border-bottom:1px solid var(--c-border)}.onb__dots{display:flex;justify-content:flex-start;gap:var(--sp-2)}.onb__dot{width:8px;height:8px;border-radius:50%;background:var(--c-border-strong);transition:all var(--dur) 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var(--ease)}.subject-card--link:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:transparent}.subject-card--locked{background:var(--c-surface-2);box-shadow:none}.subject-card__top{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--sp-3)}.subject-card__title{font-size:var(--fs-lg);font-weight:700;color:var(--c-text)}.subject-card__meta{font-size:var(--fs-sm);color:var(--c-text-subtle);margin-top:2px}.subject-card__accent{height:4px;border-radius:var(--r-pill);margin-top:auto}.subject-card--locked 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span{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.04em;opacity:.85}.unit-list{display:flex;flex-direction:column;gap:var(--sp-3)}.unit-row{display:flex;align-items:center;gap:var(--sp-4);padding:var(--sp-4) var(--sp-5);background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--shadow-xs);text-align:start;width:100%;transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}.unit-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--c-border-strong)}.unit-row--excluded{cursor:default;opacity:.48;box-shadow:var(--shadow-xs)}.unit-row--excluded:hover{transform:none;box-shadow:var(--shadow-xs);border-color:var(--c-border)}.unit-row--novel{background:linear-gradient(120deg,#faf7ff,#fff 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var(--ease)}.quiz__count{font-size:var(--fs-sm);font-weight:600;color:var(--c-text-muted);font-variant-numeric:tabular-nums;white-space:nowrap}.quiz__close{background:none;border:none;color:var(--c-text-subtle);display:grid;place-items:center;width:34px;height:34px;border-radius:50%}.quiz__close:hover{background:var(--c-surface-2);color:var(--c-text)}.quiz__body{flex:1;width:100%;max-width:var(--content-max);margin:0 auto;padding:var(--sp-5);display:grid;gap:var(--sp-5);align-content:start;justify-items:center}.quiz__body--reading{grid-template-columns:1fr 1fr;align-items:start;justify-items:stretch}.q-col{width:100%;max-width:720px}@media (max-width: 860px){.quiz__body--reading{grid-template-columns:1fr}}.passage{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);padding:var(--sp-5);box-shadow:var(--shadow-xs);position:sticky;top:calc(var(--nav-h) + var(--sp-4));max-height:calc(100vh - var(--nav-h) - var(--sp-7));overflow:auto}.passage__label{font-size:var(--fs-xs);font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--c-primary);margin-bottom:var(--sp-3)}.passage__text{font-family:var(--font-serif);font-size:var(--fs-md);line-height:1.75;color:var(--c-text)}@media (max-width: 860px){.passage{position:static;max-height:none}}.q-head{display:flex;align-items:center;gap:var(--sp-2);margin-bottom:var(--sp-4)}.q-stem{font-size:var(--fs-lg);font-weight:600;line-height:1.5;color:var(--c-text);margin-bottom:var(--sp-5)}.q-image{display:block;max-width:min(100%,520px);max-height:240px;object-fit:contain;margin:calc(var(--sp-5) * -.35) 0 var(--sp-5);border:1px solid var(--c-border);border-radius:var(--r-md);background:#fff}.choices{display:flex;flex-direction:column;gap:var(--sp-3)}.choice{display:flex;align-items:center;gap:var(--sp-3);padding:var(--sp-4);border:2px solid 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.feedback__icon{background:var(--c-danger)}.feedback__answer{font-size:var(--fs-sm);color:var(--c-text-muted);font-weight:500}.feedback__delta{margin-inline-start:var(--sp-2);font-variant-numeric:tabular-nums}.feedback__explanation{display:block;color:var(--c-text-muted);font-size:var(--fs-sm);font-weight:500;line-height:1.45;margin-top:2px}.recycle-note{display:flex;gap:var(--sp-2);align-items:center;padding:var(--sp-3) var(--sp-4);background:var(--c-warn-soft);color:var(--c-warn);border-radius:var(--r-md);font-size:var(--fs-sm);font-weight:600;margin-bottom:var(--sp-4)}.results{text-align:center}.results__ring{width:140px;height:140px;margin:var(--sp-4) auto var(--sp-5);border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--c-success) var(--deg, 0deg),var(--c-surface-3) 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var(--c-border)}.review__icon{flex-shrink:0;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:var(--fs-xs)}.review__icon--ok{background:var(--c-success)}.review__icon--no{background:var(--c-danger)}.review__q{font-weight:600;color:var(--c-text)}.review__a{font-size:var(--fs-sm);color:var(--c-text-muted);margin-top:2px}.review__image{display:block;max-width:min(100%,360px);max-height:160px;object-fit:contain;margin-top:var(--sp-2);border:1px solid var(--c-border);border-radius:var(--r-sm);background:#fff}.review__explanation{font-size:var(--fs-sm);color:var(--c-text);line-height:1.5;margin-top:var(--sp-2)}.settings-group{margin-bottom:var(--sp-6)}.settings-group__title{font-size:var(--fs-sm);font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--c-text-subtle);margin-bottom:var(--sp-3)}.settings-row{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);padding:var(--sp-4) var(--sp-5);border-bottom:1px solid var(--c-border)}.settings-row:last-child{border-bottom:none}.settings-row__label{font-weight:600;color:var(--c-text)}.settings-row__desc{font-size:var(--fs-sm);color:var(--c-text-subtle);margin-top:2px;max-width:46ch}.settings-row__control{flex-shrink:0}.settings-form.has-savebar{padding-bottom:6rem}.select{-webkit-appearance:none;-moz-appearance:none;appearance:none;padding:.5rem 2.2rem .5rem .85rem;border:1px solid var(--c-border-strong);border-radius:var(--r-sm);background:var(--c-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235a6473' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat;background-position:right .6rem center;font-weight:600;font-size:var(--fs-sm);color:var(--c-text)}.select--block{width:100%}[dir=rtl] .select{padding:.5rem .85rem .5rem 2.2rem;background-position:left .6rem center}.select:focus-visible{border-color:var(--c-primary)}.input{width:100%;padding:.75rem .9rem;border:1px solid var(--c-border-strong);border-radius:var(--r-sm);background:var(--c-surface);color:var(--c-text);font:inherit}.input:focus-visible{border-color:var(--c-primary)}.segmented{display:inline-flex;padding:3px;background:var(--c-surface-3);border-radius:var(--r-pill);gap:2px}.segmented__btn{border:none;background:transparent;padding:.4rem .9rem;border-radius:var(--r-pill);font-size:var(--fs-sm);font-weight:600;color:var(--c-text-muted);font-variant-numeric:tabular-nums}.segmented__btn.is-active{background:var(--c-surface);color:var(--c-text);box-shadow:var(--shadow-xs)}.danger-zone{border:1px solid var(--c-danger-border);border-radius:var(--r-lg);overflow:hidden}.settings-row--field{align-items:center}.settings-input{width:min(100%,260px)}.settings-input--city{width:min(100%,320px)}.settings-menu{position:relative;display:inline-block;flex-shrink:0;width:min(var(--dropdown-width, 260px),100%);max-width:100%}.settings-menu__trigger{display:inline-flex;align-items:center;justify-content:space-between;gap:var(--sp-3);width:100%;min-height:40px;padding:.5rem .85rem;border:1px solid var(--c-border-strong);border-radius:var(--r-sm);background:var(--c-surface);color:var(--c-text);font:inherit;font-size:var(--fs-sm);font-weight:600;text-align:start;touch-action:manipulation;transition:background-color .1s var(--ease),border-color .1s var(--ease),box-shadow .1s var(--ease),transform .1s var(--ease)}.settings-menu__trigger:hover:not(:disabled),.settings-menu.is-open .settings-menu__trigger{border-color:var(--c-primary);background:var(--c-primary-softer);box-shadow:0 0 0 3px #1865f214}.settings-menu__trigger:active:not(:disabled){transform:translateY(1px)}.settings-menu__trigger.is-empty{color:var(--c-text-subtle)}.settings-menu__trigger--inline{padding:.5rem .85rem}.settings-menu__label{min-width:0;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.settings-menu__chevron{flex-shrink:0;transform:rotate(90deg);transition:transform .18s var(--ease)}.settings-menu.is-open .settings-menu__chevron{transform:rotate(-90deg)}.settings-menu__list{position:absolute;inset-block-start:calc(100% + var(--sp-2));inset-inline-end:0;z-index:30;width:100%;max-width:calc(100vw - var(--sp-8));max-height:min(320px,45svh);overflow:auto;padding:var(--sp-2);border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-surface);box-shadow:var(--shadow-lg);transform-origin:top right;animation:dropdownPopIn 115ms cubic-bezier(.2,.8,.25,1)}.settings-row--field .settings-menu__list{width:100%}.settings-menu__option{position:relative;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);width:100%;min-height:38px;padding:.55rem .7rem;border:none;border-radius:var(--r-sm);background:transparent;color:var(--c-text);font-size:var(--fs-sm);font-weight:400;text-align:start;touch-action:manipulation;transition:background-color 90ms var(--ease),box-shadow 90ms var(--ease),color 90ms var(--ease),transform 90ms var(--ease)}.settings-menu__option svg{flex-shrink:0;transform:scale(.9);transition:transform .1s var(--ease)}.settings-menu__option:hover:not(:disabled),.settings-menu__option.is-selected{background:var(--c-primary-softer);color:var(--c-primary-dark)}.settings-menu__option:hover:not(:disabled){transform:translateY(-1px)}.settings-menu__option:active:not(:disabled){transform:translateY(0) scale(.99)}.settings-menu__option.is-selected{box-shadow:inset 3px 0 0 var(--c-primary)}[dir=rtl] .settings-menu__option.is-selected{box-shadow:inset -3px 0 0 var(--c-primary)}.settings-menu__option.is-selected svg{transform:scale(1)}.settings-menu__option:disabled{color:var(--c-text-subtle);cursor:not-allowed}.settings-savebar{position:fixed;inset-block-end:var(--sp-4);inset-inline:0;z-index:70;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:var(--sp-3);width:fit-content;max-width:calc(100vw - var(--sp-8));margin:0 auto;padding:var(--sp-3) var(--sp-4);border:1px solid var(--c-border);border-radius:var(--r-md);background:#fffffff0;box-shadow:var(--shadow-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:settingsSavebarIn .18s var(--ease)}.settings-savebar__message{flex-basis:100%;color:var(--c-success);font-size:var(--fs-sm);font-weight:700;text-align:center}@media (max-width: 640px){.settings-row--field{align-items:stretch;flex-direction:column}.settings-input,.settings-menu,.settings-menu__trigger,.settings-menu__trigger--inline{width:100%}.settings-menu__list,.settings-row--field .settings-menu__list{width:100%;max-width:100%}.settings-menu__option{min-height:44px;padding-block:.65rem}.settings-savebar{align-items:center;flex-direction:row;width:fit-content;max-width:calc(100vw - var(--sp-6));gap:var(--sp-2);padding:var(--sp-2) var(--sp-3)}.settings-savebar .btn{min-height:44px;padding:.62rem 1.05rem;font-size:var(--fs-sm)}.settings-savebar__message{text-align:center}}@media (hover: none) and (pointer: coarse){.settings-menu__trigger:active:not(:disabled),.settings-menu__option:hover:not(:disabled),.settings-menu__option:active:not(:disabled){transform:none}}.empty{text-align:center;padding:var(--sp-7) var(--sp-5);background:var(--c-surface);border:1px dashed var(--c-border-strong);border-radius:var(--r-lg)}.empty__icon{font-size:2.4rem;margin-bottom:var(--sp-3)}.empty h3{margin-bottom:var(--sp-2)}.fade-in{animation:fadeIn .28s var(--ease)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes cityCardReveal{to{opacity:1;transform:none}}@keyframes settingsSavebarIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}