:root{--color-paper: oklch(97.8% .006 155);--color-paper-2: oklch(96.5% .01 155);--color-paper-3: oklch(94% .014 155);--color-card: #ffffff;--color-ink: oklch(25% .035 168);--color-ink-2: oklch(38% .03 168);--color-rule: oklch(82% .02 162);--color-rule-2: oklch(90.5% .012 160);--color-muted: oklch(52% .02 168);--color-accent: oklch(55% .14 158);--color-accent-soft: oklch(94% .04 158);--color-accent-ink: #ffffff;--color-focus: oklch(55% .14 158);--ink-panel: oklch(24% .05 170);--font-display: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;--font-body: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;--font-outlier: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;--font-reading: "Literata", Georgia, "Times New Roman", serif;--space-3xs: .25rem;--space-2xs: .5rem;--space-xs: .75rem;--space-sm: 1rem;--space-md: 1.5rem;--space-lg: 2rem;--space-xl: 3rem;--space-2xl: 4.5rem;--space-3xl: 7rem;--text-xs: .8rem;--text-sm: .875rem;--text-base: 1rem;--text-md: 1.25rem;--text-lg: 1.5625rem;--text-xl: 1.953rem;--text-2xl: 2.441rem;--text-3xl: 3.052rem;--text-display-s: clamp(2rem, 3vw + .9rem, 3.25rem);--text-display: clamp(2.5rem, 4.5vw + 1rem, 4.75rem);--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-in-out: cubic-bezier(.65, 0, .35, 1);--dur-short: .18s;--dur-med: .28s;--radius-card: 16px;--radius-pill: 999px;--radius-input: 10px;--bg: var(--color-paper);--bg-tint: var(--color-paper-2);--bg-2: var(--color-paper-2);--surface: var(--color-card);--surface-2: var(--color-paper-2);--fg: var(--color-ink);--muted: var(--color-muted);--faint: oklch(48% .016 185);--border: var(--color-rule-2);--border-2: var(--color-rule);--primary: var(--color-accent);--primary-deep: oklch(36% .09 170);--primary-soft: var(--color-accent-soft);--primary-ink: oklch(28% .07 172);--ort: oklch(64% .17 55);--ort-soft: oklch(95% .045 70);--ort-deep: oklch(45% .13 45);--ort-ink: oklch(40% .12 55);--ielts: oklch(50% .21 300);--ielts-soft: oklch(94.5% .035 300);--ielts-deep: oklch(38% .16 300);--ielts-ink: oklch(43% .19 300);--gold: oklch(70% .15 88);--gold-soft: oklch(95.5% .05 95);--gold-deep: oklch(42% .1 80);--hero-brand: linear-gradient(120deg, var(--primary-deep), var(--primary) 70%, oklch(62% .15 150));--hero-ort: linear-gradient(120deg, var(--ort-deep), var(--ort) 70%, oklch(70% .17 75));--hero-ielts: linear-gradient(120deg, var(--ielts-deep), var(--ielts) 70%, oklch(58% .2 320));--hero-gold: linear-gradient(120deg, var(--gold-deep), oklch(60% .14 85) 70%, var(--gold));--track-accent: var(--primary);--track-accent-deep: var(--primary-deep);--track-accent-soft: var(--primary-soft);--track-accent-ink: var(--primary-ink);--streak: oklch(72% .15 60);--streak-d: oklch(62% .165 50);--xp: oklch(70% .15 90);--heart: oklch(62% .185 25);--gem: oklch(64% .135 200);--success: oklch(58% .14 155);--warning: oklch(66% .16 70);--danger: oklch(56% .19 25);--info: oklch(55% .14 240);--lvl-a1: oklch(64% .14 150);--lvl-a2: oklch(62% .125 188);--lvl-b1: oklch(58% .13 240);--lvl-b2: oklch(56% .14 285);--lvl-c1: oklch(58% .15 330);--r-sm: 12px;--r: 18px;--r-lg: 24px;--r-xl: 28px;--sh-1: 0 1px 2px oklch(30% .03 168 / .05), 0 4px 16px oklch(30% .03 168 / .06);--sh-2: 0 2px 4px oklch(30% .03 168 / .06), 0 12px 32px oklch(30% .04 168 / .1);--sh-pop: 0 18px 48px oklch(30% .045 168 / .18);--sh-brand: 0 8px 24px oklch(55% .14 158 / .28);--genre-detective: oklch(52% .11 255);--genre-romance: oklch(60% .17 15);--genre-scifi: oklch(54% .14 300);--genre-adventure: oklch(58% .13 70);--genre-classic: oklch(50% .12 185);--genre-nonfiction: oklch(60% .13 95);--maxw: 1200px}[data-track=english]{--track-accent: var(--primary);--track-accent-deep: var(--primary-deep);--track-accent-soft: var(--primary-soft);--track-accent-ink: var(--primary-ink);--track-hero: var(--hero-brand)}[data-track=ort]{--track-accent: var(--ort);--track-accent-deep: var(--ort-deep);--track-accent-soft: var(--ort-soft);--track-accent-ink: var(--ort-ink);--track-hero: var(--hero-ort)}[data-track=ielts]{--track-accent: var(--ielts);--track-accent-deep: var(--ielts-deep);--track-accent-soft: var(--ielts-soft);--track-accent-ink: var(--ielts-ink);--track-hero: var(--hero-ielts)}[data-palette=classic]{--color-paper: oklch(97.5% .012 175);--color-paper-2: oklch(94.5% .02 172);--color-paper-3: oklch(91% .024 170);--color-card: oklch(99.2% .004 175);--color-ink: oklch(16% .02 200);--color-ink-2: oklch(32% .018 200);--color-rule: oklch(84% .015 175);--color-rule-2: oklch(89% .012 175);--color-muted: oklch(37% .015 205);--color-accent: oklch(50% .13 185);--color-accent-soft: oklch(92% .045 175);--color-focus: oklch(55% .19 188);--faint: oklch(48% .012 205);--primary-deep: oklch(42% .115 190);--primary-ink: oklch(33% .09 192)}[data-palette=crystal]{--color-paper: oklch(98.6% .007 172);--color-paper-2: oklch(96% .012 172);--color-paper-3: oklch(93% .016 170);--color-card: oklch(100% 0 0);--color-ink: oklch(14% .02 200);--color-ink-2: oklch(30% .018 200);--color-rule: oklch(86% .012 175);--color-rule-2: oklch(91% .008 175);--color-muted: oklch(36% .014 205);--color-accent: oklch(47% .145 183);--color-accent-soft: oklch(93.5% .04 178);--color-focus: oklch(52% .19 188);--faint: oklch(47% .012 205);--primary-deep: oklch(39% .125 188);--primary-ink: oklch(31% .095 190)}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-body);background:var(--bg);color:var(--fg);line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-wrap:pretty}h1,h2,h3,h4,.display{font-family:var(--font-display);letter-spacing:-.02em;line-height:1.1}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer}:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:24px}.stack{display:flex;flex-direction:column}.row{display:flex;align-items:center}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-6{gap:24px}.spread{display:flex;align-items:center;justify-content:space-between}.muted{color:var(--muted)}.faint{color:var(--faint)}.center{text-align:center}.eyebrow{font:700 12px/1 var(--font-body);letter-spacing:.14em;text-transform:uppercase;color:var(--primary-ink)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;border-radius:999px;font-weight:700;font-size:15px;padding:13px 22px;transition:transform .08s ease,box-shadow .15s ease,background .15s;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 0 var(--primary-deep),var(--sh-1)}.btn-primary:hover{background:var(--primary-deep)}.btn-primary:active{box-shadow:0 1px 0 var(--primary-deep);transform:translateY(3px)}.btn-track{background:var(--track-accent);color:#fff;box-shadow:0 4px 0 var(--track-accent-deep),var(--sh-1)}.btn-track:hover{background:var(--track-accent-deep)}.btn-track:active{box-shadow:0 1px 0 var(--track-accent-deep);transform:translateY(3px)}.btn-ghost{background:var(--surface);color:var(--fg);border:1.5px solid var(--border-2);box-shadow:var(--sh-1)}.btn-ghost:hover{border-color:var(--primary);color:var(--primary-deep)}.btn-streak{background:var(--streak);color:#5a3a05;box-shadow:0 4px 0 var(--streak-d)}.btn-lg{padding:16px 30px;font-size:17px}.btn-sm{padding:9px 16px;font-size:13.5px}.btn-block{display:flex;width:100%}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-1)}.card-p{padding:22px}.pill{display:inline-flex;align-items:center;gap:6px;font:700 12px/1 var(--font-body);padding:6px 11px;border-radius:999px;background:var(--surface-2);color:var(--muted);border:1px 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var(--border)}.bar>i{display:block;height:100%;border-radius:999px;background:var(--success)}.bar-xp>i{background:var(--xp)}.bar-thin{height:8px}.nav{position:sticky;top:0;z-index:50;background:#f5f9f6db;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav-in{height:68px;display:flex;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;font:700 21px/1 var(--font-display);letter-spacing:-.03em;color:var(--fg);flex-shrink:0}.brand .mark{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:17px;box-shadow:var(--sh-1)}.nav-links{display:flex;align-items:center;gap:2px;min-width:0;overflow-x:auto;scrollbar-width:none}.nav-links::-webkit-scrollbar{display:none}.nav-right{flex-shrink:0}.nav-pill{position:relative;display:inline-flex;align-items:center;gap:7px;padding:9px 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