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184;--md-primary-container: 39 71 232;--md-primary-fixed: 230 234 254;--md-primary-fixed-dim: 196 205 255;--md-on-secondary: 255 255 255;--md-on-secondary-container: 85 80 74;--md-on-secondary-fixed: 34 32 28;--md-on-secondary-fixed-variant: 58 55 48;--md-secondary-container: 239 234 224;--md-secondary-fixed: 247 244 238;--md-secondary-fixed-dim: 226 219 205;--md-tertiary: 208 79 32;--md-tertiary-container: 242 106 58;--md-tertiary-fixed: 253 232 222;--md-tertiary-fixed-dim: 249 184 158;--md-on-tertiary: 255 255 255;--md-on-tertiary-container: 253 232 222;--md-on-tertiary-fixed: 58 31 20;--md-on-tertiary-fixed-variant: 208 79 32;--md-error: 214 69 69;--md-error-container: 250 219 219;--md-on-error: 255 255 255;--md-on-error-container: 92 26 26;--md-inverse-surface: 34 32 28;--md-inverse-on-surface: 247 244 238;--md-inverse-primary: 106 130 255;--md-surface-tint: 39 71 232;--md-contrast-high: 11 18 32;--md-contrast-muted: 85 80 74}.dark-mode,[data-theme=dark]{--background: #121214;--foreground: #F2EFE8;--card: #1F1F23;--card-foreground: #F2EFE8;--popover: #26262B;--popover-foreground: #F2EFE8;--primary: #6A82FF;--primary-foreground: #FFFFFF;--secondary: #F2EFE8;--secondary-foreground: #121214;--muted: #22222A;--muted-foreground: #A9A59C;--accent: #1E2548;--accent-foreground: #6A82FF;--destructive: #F17272;--destructive-foreground: #121214;--border: #2C2C36;--input: #22222A;--ring: #6A82FF;--chart-1: #6A82FF;--chart-2: #4FBF7F;--chart-3: #F9815A;--chart-4: #9767E8;--chart-5: #E07456;--sidebar: #1F1F23;--sidebar-foreground: #F2EFE8;--sidebar-primary: #6A82FF;--sidebar-primary-foreground: #FFFFFF;--sidebar-accent: #1E2548;--sidebar-accent-foreground: #6A82FF;--sidebar-border: #2C2C36;--sidebar-ring: #6A82FF;--shadow-color: rgba(0, 0, 0, .5);--shadow-2xs: 0 1px 2px rgba(0, 0, 0, .2);--shadow-xs: 0 1px 3px rgba(0, 0, 0, .25);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .35);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .4);--shadow-xl: 0 12px 32px rgba(0, 0, 0, .45);--shadow-2xl: 0 16px 48px rgba(0, 0, 0, .5);--color-surface-1: #121214;--color-surface-2: #1F1F23;--color-surface-3: #22222A;--color-text-primary: #F2EFE8;--color-text-secondary: #A9A59C;--color-accent: #6A82FF;--color-accent-hover: #4E65E0;--color-border: #2C2C36;--color-confused: #E4716B;--color-okish: #E0B14A;--color-confident: #4FBF7F;--color-confused-soft: #37201D;--color-okish-soft: #332815;--color-confident-soft: #13301F;--color-theme-a: #6A82FF;--color-theme-b: #E07456;--color-theme-c: #4FBF7F;--color-theme-d: #9767E8;--color-theme-e: #F17272;--md-on-surface: 242 239 232;--md-on-surface-variant: 169 165 156;--md-on-background: 242 239 232;--md-outline: 140 140 156;--md-outline-variant: 140 140 156;--md-surface-container-lowest: 31 31 35;--md-surface-container-low: 26 26 29;--md-surface-container: 34 34 42;--md-surface-container-high: 44 44 54;--md-surface-container-highest: 60 60 71;--md-surface-variant: 34 34 42;--md-surface-dim: 13 13 15;--md-surface-bright: 38 38 43;--md-on-primary: 255 255 255;--md-on-primary-container: 233 237 255;--md-on-primary-fixed: 233 237 255;--md-on-primary-fixed-variant: 141 160 255;--md-primary-container: 106 130 255;--md-primary-fixed: 30 37 72;--md-primary-fixed-dim: 42 51 100;--md-on-secondary: 18 18 20;--md-on-secondary-container: 169 165 156;--md-on-secondary-fixed: 226 221 208;--md-on-secondary-fixed-variant: 199 194 182;--md-secondary-container: 34 34 42;--md-secondary-fixed: 26 26 29;--md-secondary-fixed-dim: 44 44 54;--md-tertiary: 249 129 90;--md-tertiary-container: 58 31 20;--md-tertiary-fixed: 58 31 20;--md-tertiary-fixed-dim: 107 58 34;--md-on-tertiary: 18 18 20;--md-on-tertiary-container: 249 129 90;--md-on-tertiary-fixed: 253 232 222;--md-on-tertiary-fixed-variant: 249 129 90;--md-error: 241 114 114;--md-error-container: 58 25 25;--md-on-error: 18 18 20;--md-on-error-container: 241 114 114;--md-inverse-surface: 242 239 232;--md-inverse-on-surface: 31 31 35;--md-inverse-primary: 39 71 232;--md-surface-tint: 106 130 255;--md-contrast-high: 242 239 232;--md-contrast-muted: 169 165 156}.dark{--background: #121214;--foreground: #F2EFE8;--card: #1F1F23;--card-foreground: #F2EFE8;--popover: #26262B;--popover-foreground: #F2EFE8;--primary: #6A82FF;--primary-foreground: #FFFFFF;--secondary: #F2EFE8;--secondary-foreground: #121214;--muted: #22222A;--muted-foreground: #A9A59C;--accent: #1E2548;--accent-foreground: #6A82FF;--destructive: #F17272;--destructive-foreground: #121214;--border: #2C2C36;--input: #22222A;--ring: #6A82FF;--sidebar: #1F1F23;--sidebar-foreground: #F2EFE8;--sidebar-primary: #6A82FF;--sidebar-primary-foreground: #FFFFFF;--sidebar-accent: #1E2548;--sidebar-accent-foreground: #6A82FF;--sidebar-border: #2C2C36;--sidebar-ring: #6A82FF;--shadow-color: rgba(0, 0, 0, .5);--color-surface-1: #121214;--color-surface-2: #1F1F23;--color-surface-3: #22222A;--color-text-primary: #F2EFE8;--color-text-secondary: #A9A59C;--color-accent: #6A82FF;--color-accent-hover: #4E65E0;--color-border: #2C2C36}:root{--color-background: var(--background);--color-foreground: var(--foreground);--color-card: var(--card);--color-card-foreground: var(--card-foreground);--color-popover: var(--popover);--color-popover-foreground: var(--popover-foreground);--color-primary: var(--primary);--color-primary-foreground: var(--primary-foreground);--color-secondary: var(--secondary);--color-secondary-foreground: var(--secondary-foreground);--color-muted: var(--muted);--color-muted-foreground: var(--muted-foreground);--color-accent: var(--primary);--color-accent-foreground: var(--primary-foreground);--color-destructive: var(--destructive);--color-destructive-foreground: var(--destructive-foreground);--color-border: var(--border);--color-input: var(--input);--color-ring: var(--ring);--color-chart-1: var(--chart-1);--color-chart-2: var(--chart-2);--color-chart-3: var(--chart-3);--color-chart-4: var(--chart-4);--color-chart-5: var(--chart-5);--color-sidebar: var(--sidebar);--color-sidebar-foreground: var(--sidebar-foreground);--color-sidebar-primary: var(--sidebar-primary);--color-sidebar-primary-foreground: var(--sidebar-primary-foreground);--color-sidebar-accent: var(--sidebar-accent);--color-sidebar-accent-foreground: var(--sidebar-accent-foreground);--color-sidebar-border: var(--sidebar-border);--color-sidebar-ring: var(--sidebar-ring);--radius-sm: calc(var(--radius) - 4px);--radius-md: calc(var(--radius) - 2px);--radius-lg: var(--radius);--radius-xl: calc(var(--radius) + 4px)}*{border-color:var(--border)}html{font-size:16px}body{background-color:var(--background);color:var(--foreground);font-family:var(--font-sans);font-size:1rem;line-height:1.6}h1{font-family:var(--font-display);font-size:1.875rem;font-weight:700;line-height:1.15;letter-spacing:-.02em}h2{font-family:var(--font-display);font-size:1.5rem;font-weight:600;line-height:1.3;letter-spacing:-.02em}h3{font-size:1.25rem;font-weight:600;line-height:1.4}h4{font-size:1.125rem;font-weight:500;line-height:1.4}p{font-size:1rem;line-height:1.6}button:focus-visible,a:focus-visible,input:focus-visible,[role=button]:focus-visible{outline:2px solid #2c2abc;outline-offset:2px;border-radius:4px}button,a,[role=button]{transition-property:color,background-color,border-color,opacity,transform,box-shadow;transition-duration:.2s;transition-timing-function:cubic-bezier(.33,1,.68,1)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#63636333;border-radius:9999px}::-webkit-scrollbar-thumb:hover{background:#63636366}button,a,input,select,textarea,[role=button],[role=radio],.glass-card,.glass-card-home,.editorial-shadow{transition-property:background-color,border-color,color,opacity,transform,box-shadow;transition-timing-function:ease;transition-duration:.2s}.spring-transition{transition-timing-function:cubic-bezier(.34,1.56,.64,1)}kbd{font-family:var(--font-mono);font-size:.75rem;font-weight:500;padding:2px 6px;border-radius:4px;background:var(--muted);border:1px solid var(--border);box-shadow:0 1px 0 var(--border);color:var(--muted-foreground)}.glass-card{background:#ffffffb3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(199,196,215,.2)}.dark-mode .glass-card,[data-theme=dark] .glass-card{background:#1f1f23b3;border:1px solid rgba(60,60,71,.5)}.glass-card-home{background:#ffffffd9;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.dark-mode .glass-card-home,[data-theme=dark] .glass-card-home{background:#1f1f23d9}.editorial-shadow{box-shadow:0 20px 40px #191c1e0a}.dark-mode .editorial-shadow,[data-theme=dark] .editorial-shadow{box-shadow:0 20px 40px #00000040}.cloud-shadow{box-shadow:0 20px 40px #131c1e0f}.dark-mode .cloud-shadow,[data-theme=dark] .cloud-shadow{box-shadow:0 20px 40px #0000004d}.section-header{font-family:Plus Jakarta Sans,sans-serif;font-weight:800;letter-spacing:.15em;text-transform:uppercase;font-size:.75rem;color:#464554}.dark-mode .section-header,[data-theme=dark] .section-header{color:#a9a59c}.nudge-gradient-border{position:relative;background:#fff;background-clip:padding-box;border:2px solid transparent}.nudge-gradient-border:before{content:"";position:absolute;top:-2px;bottom:-2px;left:-2px;right:-2px;z-index:-1;border-radius:inherit;background:linear-gradient(135deg,#ffdcc5,#ffb782)}.dark-mode .nudge-gradient-border,[data-theme=dark] .nudge-gradient-border{background:#1f1f23e6}.dark-mode .nudge-gradient-border:before,[data-theme=dark] .nudge-gradient-border:before{background:linear-gradient(135deg,#ffdcc54d,#ffb7824d)}.iridescent-border{position:relative;padding:1px;background:linear-gradient(135deg,#2c2abc,#c0c1ff,#4648d4)}.dark-mode .iridescent-border,[data-theme=dark] .iridescent-border{background:linear-gradient(135deg,#4e65e0,#6a82ff,#8da0ff)}.glass-effect{background:#ffffffb3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.dark-mode .glass-effect,[data-theme=dark] .glass-effect{background:#1f1f23b3}.primary-gradient{background:linear-gradient(135deg,#2c2abc,#4648d4)}.label-uppercase{font-size:11px;font-weight:700;letter-spacing:.15em;text-transform:uppercase}.gradient-cta{background:linear-gradient(135deg,#4648d4,#6063ee);color:#fff;border:none}.gradient-cta:hover{background:linear-gradient(135deg,#3a3cc0,#5457e0)}.scrollbar-hide::-webkit-scrollbar{display:none}.scrollbar-hide{-ms-overflow-style:none;scrollbar-width:none}.border-success{border-color:#43a047}.dark-mode .border-success,[data-theme=dark] .border-success{border-color:#4fbf7f}.text-warning{color:#b45309}.bg-warning{background-color:#f59e0b}.dark-mode .text-warning,[data-theme=dark] .text-warning{color:#e0b14a}.dark-mode .bg-warning,[data-theme=dark] .bg-warning{background-color:#b8892e}:root{--token-z-study-diagram-overlay: 1300;--token-z-study-diagram-dialog: 1301;--token-surface-base: var(--background);--token-surface-raised: var(--card);--token-surface-sunken: var(--muted);--token-surface-overlay: rgba(255, 255, 255, .85);--token-surface-overlay-subtle: rgba(255, 255, 255, .7);--token-surface-inverse: oklch(.22 .012 260);--token-text-default: var(--foreground);--token-text-muted: var(--muted-foreground);--token-text-subtle: #7C7668;--token-text-inverse: #FFFFFF;--token-text-on-primary: var(--primary-foreground);--token-text-link: var(--primary);--token-primary: var(--primary);--token-primary-hover: #1A31B8;--token-primary-subtle: rgba(39, 71, 232, .1);--token-primary-gradient-from: #2747E8;--token-primary-gradient-to: #1A31B8;--token-primary-gradient-accent: #6A82FF;--token-secondary: var(--secondary);--token-secondary-subtle: rgba(239, 234, 224, .5);--token-accent: var(--primary);--token-accent-hover: #1A31B8;--token-accent-subtle: rgba(39, 71, 232, .08);--token-border-default: var(--border);--token-border-strong: #CDC4B3;--token-border-subtle: rgba(226, 219, 205, .5);--token-border-focus: var(--ring);--token-glass-bg: rgba(246, 241, 232, .8);--token-glass-bg-strong: rgba(246, 241, 232, .92);--token-glass-border: rgba(226, 219, 205, .4);--token-glass-blur: 12px;--token-glass-blur-strong: 16px;--token-shadow-editorial: 0 4px 14px rgba(11, 18, 32, .08);--token-shadow-editorial-hover: 0 20px 40px -16px rgba(11, 18, 32, .18);--token-shadow-cloud: 0px 20px 40px rgba(11, 18, 32, .1);--token-shadow-glow: 0 8px 20px -6px rgba(39, 71, 232, .25);--token-radius-xs: 4px;--token-radius-sm: 8px;--token-radius-md: 12px;--token-radius-lg: 16px;--token-radius-xl: 24px;--token-radius-pill: 9999px;--token-font-size-2xs: .6875rem;--token-font-size-xs: .75rem;--token-font-size-sm: .8125rem;--token-font-size-base: .875rem;--token-font-size-md: .9375rem;--token-font-size-lg: 1rem;--token-font-size-xl: 1.125rem;--token-font-size-2xl: 1.25rem;--token-font-size-3xl: 1.5rem;--token-font-size-4xl: 1.875rem;--token-space-xs: .25rem;--token-space-sm: .5rem;--token-space-md: 1rem;--token-space-lg: 1.5rem;--token-space-xl: 2rem;--token-space-2xl: 3rem;--token-space-3xl: 4rem;--token-success: var(--color-confident);--token-warning: #b45309;--token-error: var(--destructive);--token-info: var(--primary);--token-mark-awarded: #10b981;--token-mark-awarded-bg: rgba(16, 185, 129, .08);--token-mark-awarded-border: rgba(16, 185, 129, .4);--token-mark-missed: #d97706;--token-mark-missed-bg: rgba(217, 119, 6, .08);--token-mark-missed-border: rgba(217, 119, 6, .4);--token-mark-missed-badge-bg: rgba(217, 119, 6, .1);--token-mark-missed-badge-text: #92400e}.dark-mode,[data-theme=dark]{--token-surface-base: var(--background);--token-surface-raised: var(--card);--token-surface-sunken: var(--background);--token-surface-overlay: #26262B;--token-surface-overlay-subtle: rgba(38, 38, 43, .7);--token-surface-inverse: #F2EFE8;--token-text-default: var(--foreground);--token-text-muted: var(--muted-foreground);--token-text-subtle: #83807A;--token-text-inverse: #121214;--token-text-on-primary: var(--primary-foreground);--token-text-link: #6A82FF;--token-primary: var(--primary);--token-primary-hover: #4E65E0;--token-primary-subtle: rgba(106, 130, 255, .15);--token-primary-gradient-from: #6A82FF;--token-primary-gradient-to: #4E65E0;--token-primary-gradient-accent: #8DA0FF;--token-secondary: var(--secondary);--token-secondary-subtle: rgba(34, 34, 42, .5);--token-accent: var(--primary);--token-accent-hover: #4E65E0;--token-accent-subtle: rgba(106, 130, 255, .12);--token-border-default: var(--border);--token-border-strong: #3C3C47;--token-border-subtle: rgba(44, 44, 54, .5);--token-border-focus: var(--ring);--token-glass-bg: rgba(18, 18, 20, .8);--token-glass-bg-strong: rgba(18, 18, 20, .92);--token-glass-border: rgba(60, 60, 71, .6);--token-shadow-editorial: 0 4px 14px rgba(0, 0, 0, .3);--token-shadow-editorial-hover: 0 20px 40px -16px rgba(0, 0, 0, .5);--token-shadow-cloud: 0px 20px 40px rgba(0, 0, 0, .4);--token-shadow-glow: 0 8px 20px -6px rgba(106, 130, 255, .35);--token-success: var(--color-confident);--token-warning: #E0B14A;--token-error: var(--destructive);--token-info: var(--primary);--token-mark-awarded: #4FBF7F;--token-mark-awarded-bg: rgba(79, 191, 127, .12);--token-mark-awarded-border: rgba(79, 191, 127, .4);--token-mark-missed: #E0B14A;--token-mark-missed-bg: rgba(224, 177, 74, .12);--token-mark-missed-border: rgba(224, 177, 74, .4);--token-mark-missed-badge-bg: rgba(224, 177, 74, .15);--token-mark-missed-badge-text: #E0B14A}.dark{--token-surface-base: var(--background);--token-surface-raised: var(--card);--token-surface-sunken: var(--background);--token-surface-overlay: #26262B;--token-surface-overlay-subtle: rgba(38, 38, 43, .7);--token-surface-inverse: #F2EFE8;--token-text-default: var(--foreground);--token-text-muted: var(--muted-foreground);--token-text-subtle: #83807A;--token-text-inverse: #121214;--token-text-on-primary: var(--primary-foreground);--token-text-link: #6A82FF;--token-primary: var(--primary);--token-primary-hover: #4E65E0;--token-primary-subtle: rgba(106, 130, 255, .15);--token-primary-gradient-from: #6A82FF;--token-primary-gradient-to: #4E65E0;--token-primary-gradient-accent: #8DA0FF;--token-secondary: var(--secondary);--token-secondary-subtle: rgba(34, 34, 42, .5);--token-accent: var(--primary);--token-accent-hover: #4E65E0;--token-accent-subtle: rgba(106, 130, 255, .12);--token-border-default: var(--border);--token-border-strong: #3C3C47;--token-border-subtle: rgba(44, 44, 54, .5);--token-border-focus: var(--ring);--token-glass-bg: rgba(18, 18, 20, .8);--token-glass-bg-strong: rgba(18, 18, 20, .92);--token-glass-border: rgba(60, 60, 71, .6);--token-shadow-editorial: 0 4px 14px rgba(0, 0, 0, .3);--token-shadow-editorial-hover: 0 20px 40px -16px rgba(0, 0, 0, .5);--token-shadow-cloud: 0px 20px 40px rgba(0, 0, 0, .4);--token-shadow-glow: 0 8px 20px -6px rgba(106, 130, 255, .35);--token-success: var(--color-confident);--token-warning: #E0B14A;--token-error: var(--destructive);--token-info: var(--primary)}:root{--ink: #0B1220;--cobalt: #2747E8;--cobalt-deep: #1A31B8;--cobalt-soft: #E6EAFE;--cobalt-rgb: 39,71,232;--cobalt-wash: #F4F6FE;--signal: #F26A3A;--signal-deep: #D04F20;--signal-soft: #FDE8DE;--paper: #F6F1E8;--paper-deep: #EDE5D3;--chalk: #FFFFFF;--rx-gray-50: #F7F4EE;--rx-gray-100: #EFEAE0;--rx-gray-200: #E2DBCD;--rx-gray-300: #CDC4B3;--rx-gray-400: #A8A191;--rx-gray-500: #7C7668;--rx-gray-600: #55504A;--rx-gray-700: #3A3730;--rx-gray-800: #22201C;--rx-gray-900: #12110F;--correct: #2E8B57;--correct-soft: #DCEEE2;--incorrect: #D64545;--incorrect-soft:#FADBDB;--pending: #B8892E;--pending-soft: #F3E8CB;--subj-math: #2747E8;--subj-physics: #6E3BD4;--subj-chem: #2E8B57;--subj-bio: #118C7A;--subj-econ: #C8522C;--subj-english: #8B4513;--subj-history: #1F3A5F;--subj-tok: #F26A3A;--subj-physics-surface: var(--subj-physics);--rx-bg: var(--paper);--rx-bg-elevated: var(--chalk);--rx-bg-muted: var(--paper-deep);--rx-bg-inset: var(--rx-gray-100);--rx-fg: var(--ink);--rx-fg-muted: var(--rx-gray-600);--rx-fg-subtle: 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var(--tf-recap));color:var(--preview-on-accent, #fff)}.tf-next-chip{font-style:normal;font-size:12px;font-weight:700;letter-spacing:.02em;margin-left:8px;padding:2px 8px;border-radius:999px;color:var(--tf-step, var(--tf-recap));border:1px solid currentColor;vertical-align:1px}.tf-tests,.tf-practice,.tp-page{--tf-calm: var(--calm-accent, #2f6b4f);--tf-calm-wash: var(--calm-wash, #e3efdc)}.tf-btn-add{background:var(--tf-calm);color:#fff;border:1.5px solid var(--tf-calm);box-shadow:0 6px 16px -8px color-mix(in srgb,var(--tf-calm) 70%,transparent)}.tf-btn-add:hover{background:var(--calm-accent-deep, var(--tf-calm))}.tf-btn-add .material-symbols-outlined{font-size:20px}[data-theme=dark] .tf-btn-add{color:#10231a}.tf-hero{border:0;box-shadow:0 1px #202a350a,0 14px 34px -22px #203c2859}.tf-steps{background:var(--tf-calm-wash);border-radius:16px;padding:10px 18px}.tf-step{border-top-color:color-mix(in srgb,var(--tf-calm) 18%,transparent)}.tf-topics 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40px;background:var(--sc-card);border:1px solid var(--sc-line);border-radius:999px;color:var(--sc-ink);font-size:15px}.sheet-collection-filters input:focus-visible,.sheet-collection-filters select:focus-visible{outline:2px solid var(--token-primary);outline-offset:2px}.sheet-collection-alert{margin:0 0 20px;padding:12px 16px;border-radius:12px;background:var(--calm-sun, var(--token-surface-sunken));color:var(--sc-ink)}.sheet-collection-groups{display:flex;flex-direction:column;gap:34px}.sheet-collection-group h2{display:flex;align-items:center;gap:8px;font-family:var(--font-display, "Space Grotesk", sans-serif);font-size:20px;font-weight:550;color:var(--sc-ink)}.sheet-collection-group h2>.material-symbols-outlined{font-size:22px;color:var(--sc-accent)}.sheet-group-count{color:var(--sc-muted);font-weight:400}.sheet-collection-group>summary{list-style:none;cursor:pointer;min-height:44px;display:flex;align-items:center;gap:6px}.sheet-collection-group>summary::-webkit-details-marker{display:none}.sheet-collection-group.is-folded h2{color:var(--sc-muted)}.sheet-collection-group.is-folded h2>.material-symbols-outlined{color:var(--sc-muted)}.sheet-group-chevron{color:var(--sc-muted);transition:transform .18s ease}.sheet-collection-group[open] .sheet-group-chevron{transform:rotate(180deg)}.sheet-collection-list{list-style:none;padding:0;margin:14px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.sheet-collection-list>li{min-width:0}.sheet-doc{--doc-tone: var(--preview-navy, var(--token-primary));--doc-wash: var(--preview-navy-wash, var(--token-primary-subtle));position:relative;height:100%;display:flex;flex-direction:column;border:1px solid var(--sc-line);border-radius:14px 22px 14px 14px;background:var(--sc-card);box-shadow:var(--sc-shadow);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.sheet-doc[data-subject=maths]{--doc-tone: var(--preview-green, var(--token-success));--doc-wash: var(--preview-green-wash, var(--token-secondary-subtle))}.sheet-doc[data-subject=chemistry]{--doc-tone: var(--preview-terra, var(--token-warning));--doc-wash: var(--preview-terra-wash, var(--token-secondary-subtle))}.sheet-doc:after{content:"";position:absolute;top:-1px;right:-1px;width:24px;height:24px;background:linear-gradient(225deg,var(--sc-page) 0 50%,var(--doc-wash) 50% 100%);border-bottom-left-radius:7px;pointer-events:none}.sheet-doc:hover{transform:translateY(-2px);box-shadow:var(--sc-shadow-hover)}.sheet-doc.is-upcoming{border-color:var(--sc-accent)}.sheet-doc-open{flex:1;display:flex;flex-direction:column;gap:10px;padding:18px 20px;color:var(--sc-ink);text-decoration:none;border-radius:inherit}.sheet-doc-open:focus-visible{outline:3px solid var(--token-primary);outline-offset:2px}.sheet-doc-top{display:flex;align-items:center;gap:10px;padding-right:18px;min-width:0}.sheet-doc-icon{display:inline-grid;place-items:center;width:36px;height:40px;flex-shrink:0;border-radius:8px 12px 8px 8px;background:var(--doc-wash);color:var(--doc-tone)}.sheet-doc-icon .material-symbols-outlined{font-size:21px}.sheet-doc-course{font-size:13px;line-height:1.35;color:var(--sc-muted);overflow-wrap:anywhere}.sheet-doc h3{font-family:var(--font-headline, "Space Grotesk", sans-serif);font-size:18px;line-height:1.3;font-weight:600;letter-spacing:-.01em;overflow-wrap:anywhere}.sheet-doc-chips{display:flex;flex-wrap:wrap;gap:6px}.sheet-doc-chip{max-width:100%;font-size:12px;line-height:1.3;padding:4px 9px;border-radius:999px;background:var(--token-surface-sunken, var(--sc-wash));color:var(--sc-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sheet-doc-chip.is-more{font-variant-numeric:tabular-nums}.sheet-doc-date{margin-top:auto;align-self:flex-start;font-size:13px;font-weight:500;line-height:1.3;padding:5px 10px;border-radius:8px;background:var(--token-surface-sunken, var(--sc-page));color:var(--sc-muted)}.sheet-doc.is-upcoming .sheet-doc-date{background:var(--sc-wash);color:var(--sc-accent);font-weight:600}.sheet-doc-topics{border-top:1px dashed var(--sc-line);padding:6px 20px 10px;font-size:14px}.sheet-doc-topics summary{cursor:pointer;min-height:36px;line-height:36px;color:var(--sc-muted)}.sheet-doc-topics ul{padding:4px 0 6px 18px;display:grid;gap:6px}.sheet-doc-topics li>span{color:var(--sc-muted);font-size:12px}.sheet-collection-empty{padding:36px 0;max-width:52ch}.sheet-collection-empty h2{font-size:22px;margin:16px 0 8px;font-weight:600}.sheet-collection-empty p{color:var(--sc-muted);line-height:1.6}.sheet-collection-home{margin:40px 0}.sheet-collection-home>header{display:flex;justify-content:space-between;align-items:center;gap:16px}.sheet-collection-home h2{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:600}.sheet-heading-icon{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--sc-wash);color:var(--sc-accent)}.sheet-heading-icon .material-symbols-outlined{font-size:20px}.sheet-collection-home>p{margin-top:16px;color:var(--sc-muted)}.sheet-collection-home-empty{padding:16px 18px;border:1px dashed var(--sc-line);border-radius:14px}.sheet-collection-list.is-compact{grid-template-columns:repeat(3,minmax(0,1fr))}.sheet-collection-list.is-compact .sheet-doc h3{font-size:17px}@media (max-width: 760px){.sheet-collection{padding-top:22px}.sheet-collection-heading{grid-template-columns:auto minmax(0,1fr)}.sheet-collection-heading>.study-button{grid-column:1 / -1;justify-self:start}.sheet-collection-mark{width:44px;height:44px;border-radius:13px}.sheet-collection-list,.sheet-collection-list.is-compact{grid-template-columns:1fr}.sheet-filter-course,.sheet-filter-search{flex-basis:100%}}@media (prefers-reduced-motion: reduce){.sheet-doc,.sheet-group-chevron{transition:none}.sheet-doc:hover{transform:none}}.rm-landing,.radius-entry,.radius-onboarding,.rm-prep-journey,.rm-home-promise{--rm-ink: var(--preview-ink, var(--token-text-default));--rm-muted: var(--preview-muted, var(--token-text-muted));--rm-paper: var(--preview-paper, var(--token-surface-base));--rm-raised: var(--preview-raised, var(--token-surface-raised));--rm-border: var(--preview-border, var(--token-border-default));--rm-green: var(--preview-green, var(--token-primary));--rm-green-wash: var(--preview-green-wash, var(--token-primary-subtle));--rm-navy: var(--preview-navy, var(--token-primary));--rm-navy-wash: var(--preview-navy-wash, var(--token-primary-subtle));--rm-orange: var(--preview-terra, var(--token-primary));--rm-orange-wash: var(--preview-terra-wash, var(--token-primary-subtle));color:var(--rm-ink);font-family:Inter,sans-serif;font-size:16px;line-height:1.55}.rm-tone-recap{--rm-accent: var(--rm-navy);--rm-wash: var(--rm-navy-wash)}.rm-tone-identify{--rm-accent: var(--rm-green);--rm-wash: var(--rm-green-wash)}.rm-tone-solve{--rm-accent: var(--rm-orange);--rm-wash: var(--rm-orange-wash)}.rm-landing{background:var(--rm-paper)}.rm-landing *,.radius-entry *,.rm-prep-journey *,.rm-home-promise *{box-sizing:border-box}.rm-landing h1,.rm-landing h2,.rm-landing h3,.rm-entry-brand h2,.rm-sheet h3,.rm-home-promise h3,.rm-prep-journey h2,.rm-prep-journey h3{font-family:Space Grotesk,sans-serif;font-weight:500;letter-spacing:-.045em}.rm-container{width:min(1240px,calc(100% - 96px));margin-inline:auto}.rm-landing :is(a,button):focus-visible,.radius-entry :is(a,button):focus-visible{outline:2px solid var(--rm-green);outline-offset:5px}.rm-landing a,.radius-entry a{text-decoration:none}.rm-button{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:14px 25px;border-radius:10px;background:var(--rm-green);color:var(--preview-on-accent, var(--token-text-on-primary));font-size:16px;font-weight:600;line-height:1.4;transition:transform .18s ease-out,background .18s ease-out;text-align:center}.rm-button:hover{background:color-mix(in srgb,var(--rm-green) 88%,var(--rm-ink));transform:translateY(-2px)}.rm-button-small{min-height:44px;padding:10px 18px;font-size:14px}.rm-text-link{display:inline-flex;min-height:44px;padding:10px 12px;align-items:center;font-weight:600}.rm-text-link:hover{text-decoration:underline;text-underline-offset:5px}.rm-skip{position:absolute;top:-80px;left:20px;z-index:100;background:var(--rm-raised);padding:12px}.rm-skip:focus{top:12px}.rm-nav-wrap{border-bottom:1px solid var(--rm-border)}.rm-nav{min-height:90px;display:flex;align-items:center;gap:42px}.rm-nav-actions{display:flex;align-items:center;gap:18px;margin-left:auto}.rm-nav-explore{color:var(--rm-muted);font-size:14px;min-height:44px;display:flex;align-items:center}.rm-nav-explore:hover{color:var(--rm-green)}.rm-wordmark{display:inline-flex;gap:9px;align-items:center;font:600 30px/1 Space Grotesk,sans-serif;letter-spacing:-.055em;width:fit-content;color:var(--rm-ink, var(--token-text-default));min-height:44px}.rm-brand-stop{color:var(--rm-green, var(--token-primary));margin-left:-8px}.rm-brand-mark{width:29px;height:29px;border:2px solid currentColor;border-radius:50%;position:relative;margin-right:3px}.rm-brand-mark:after{content:"";position:absolute;width:12px;height:2px;background:currentColor;top:12px;left:12px;transform:rotate(-35deg);transform-origin:left}.rm-brand-mark i{width:4px;height:4px;position:absolute;border-radius:50%;background:currentColor;top:11px;left:11px}.rm-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(30px,5vw,86px);padding-block:76px 80px;align-items:center}.rm-kicker{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:550;color:var(--rm-green);margin:0 0 24px}.rm-ink-dot{width:7px;height:7px;border-radius:50%;display:inline-block;background:currentColor;flex-shrink:0}.rm-hero h1{font-size:clamp(58px,6.6vw,92px);line-height:.99;margin:0 0 29px;letter-spacing:-.065em}.rm-hero h1>span{color:var(--rm-green)}.rm-hero-description{font-size:clamp(20px,2vw,25px);line-height:1.4;letter-spacing:-.025em;margin:0 0 14px}.rm-hero-detail{color:var(--rm-muted);line-height:1.7;max-width:40ch;margin:0}.rm-hero-actions{margin-top:28px;display:flex;gap:13px;align-items:flex-start;flex-direction:column}.rm-hero-actions>span{font-size:14px;color:var(--rm-muted)}.rm-product-preview{min-width:0;padding:24px 16px 0}.rm-preview-caption{display:flex;gap:9px;align-items:center;font-size:14px;margin-bottom:22px;color:var(--rm-green)}.rm-preview-caption .material-symbols-outlined{font-size:21px}.rm-preview-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;position:relative;z-index:2;margin:0 0 20px}.rm-preview-tabs button{display:flex;gap:8px;justify-content:center;align-items:center;min-height:48px;padding:10px 9px;border:1px solid transparent;border-radius:8px;font-weight:550;font-size:14px;color:var(--rm-accent);transition:background .16s}.rm-preview-tabs button .material-symbols-outlined{font-size:21px}.rm-preview-tabs button:hover{background:var(--rm-wash)}.rm-preview-tabs button[aria-pressed=true]{background:var(--rm-wash);border-color:var(--rm-accent)}.rm-preview-stage{position:relative;margin:0 12px 25px;padding-top:10px}.rm-sheet-underlay{position:absolute;top:14px;right:4px;bottom:-4px;left:4px;border:1px solid var(--rm-border);border-radius:5px 18px 5px 5px}.rm-underlay-one{background:var(--rm-navy-wash);transform:rotate(-6deg)}.rm-underlay-two{background:var(--rm-orange-wash);transform:rotate(4deg)}.rm-sheet{background:var(--rm-raised);border:1px solid var(--rm-border);border-radius:5px 20px 5px 5px;padding:24px 28px 18px;position:relative;color:var(--rm-ink);box-shadow:0 12px 25px -18px color-mix(in srgb,var(--rm-ink) 40%,transparent)}.rm-sheet-top{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--rm-muted);font-size:12px;font-weight:500;letter-spacing:.025em}.rm-sheet-top .material-symbols-outlined{color:var(--rm-green);font-size:24px}.rm-sheet-heading{margin-top:23px}.rm-sheet-heading small{display:block;color:var(--rm-muted);font-size:13px;margin-bottom:7px;overflow-wrap:anywhere}.rm-sheet-heading h3{font-size:clamp(24px,2.3vw,31px);line-height:1.12;margin:0}.rm-sheet-rule{height:1px;background:var(--rm-border);margin:22px 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span:last-child{width:68%}.rm-sheet-bottom{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--rm-green);padding-top:10px}.rm-sheet-bottom .material-symbols-outlined{font-size:18px}.rm-example{display:block;font-size:11px;color:var(--rm-muted);margin-top:14px}.rm-preview-benefit{display:flex;align-items:flex-start;gap:13px;padding:16px 0 0;min-height:104px}.rm-preview-benefit>.material-symbols-outlined{color:var(--rm-accent);font-size:26px;margin-top:3px}.rm-preview-benefit strong{font-size:17px;font-weight:550;color:var(--rm-accent)}.rm-preview-benefit p{margin:4px 0 0;color:var(--rm-muted);font-size:14px}.rm-course-strip{border-block:1px solid var(--rm-border);display:flex;align-items:center;gap:40px;padding-block:25px}.rm-course-strip>span{color:var(--rm-muted);font-size:14px}.rm-course-strip ul{flex:1;display:flex;justify-content:space-around;gap:24px;padding:0;margin:0;list-style:none}.rm-course-strip li{font-family:Space Grotesk,sans-serif;font-size:21px;letter-spacing:-.03em}.rm-course-strip li small{color:var(--rm-muted);font-family:Inter,sans-serif;font-size:12px;letter-spacing:0;margin-left:7px;white-space:nowrap}.rm-loop{padding-block:100px 90px;scroll-margin-top:32px}.rm-section-intro{display:grid;grid-template-columns:1.4fr 1fr;gap:35px;align-items:end;margin-bottom:48px}.rm-section-intro h2{font-size:clamp(33px,4.1vw,54px);line-height:1.13;margin:0}.rm-section-intro h2 span{color:var(--rm-green)}.rm-section-intro>p{color:var(--rm-muted);margin:0 0 3px;font-size:18px}.rm-mode-row{display:grid;grid-template-columns:58px 1fr 1.25fr;gap:24px;padding:27px 0;border-top:1px solid var(--rm-border);align-items:center}.rm-mode-row:last-child{border-bottom:1px solid var(--rm-border)}.rm-mode-number{font-size:14px;color:var(--rm-muted)}.rm-mode-name{display:flex;align-items:center;gap:19px;color:var(--rm-accent)}.rm-mode-name>.material-symbols-outlined{font-size:29px}.rm-mode-name h3{margin:0;font-size:36px}.rm-mode-copy h4{margin:0 0 5px;font-weight:550;font-size:17px}.rm-mode-copy p{color:var(--rm-muted);font-size:16px;margin:0}.rm-availability{color:var(--rm-muted);font-size:14px;margin-top:22px}.rm-test-feature{background:var(--rm-green-wash)}.rm-test-feature-grid{display:grid;grid-template-columns:1fr 1.2fr;align-items:center;gap:clamp(45px,8vw,120px);padding-block:85px}.rm-feature-paper{padding:16px 25px 0 8px}.rm-feature-paper .rm-sheet{transform:rotate(-4deg)}.rm-paper-caption{display:flex;gap:10px;margin-top:32px;justify-content:center;color:var(--rm-green);font-size:14px}.rm-feature-copy h2{font-size:clamp(35px,4vw,54px);line-height:1.08;margin:0 0 24px}.rm-feature-copy h2 span{color:var(--rm-green)}.rm-feature-copy>p:not(.rm-kicker){max-width:45ch;margin:0;line-height:1.75}.rm-benefit-list{list-style:none;margin:25px 0 29px;padding:0;display:grid;gap:11px}.rm-benefit-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px}.rm-benefit-list .material-symbols-outlined{color:var(--rm-green);font-size:20px;margin-top:1px}.rm-feature-copy>small{display:block;font-size:13px;margin-top:12px;color:var(--rm-muted)}.rm-finish{padding-block:90px;display:flex;gap:35px;align-items:center;justify-content:space-between}.rm-finish .rm-kicker{margin-bottom:14px}.rm-finish h2{font-size:clamp(38px,5vw,68px);margin:0;line-height:1.1}.rm-footer{border-top:1px solid var(--rm-border);padding-block:30px;display:flex;gap:30px;align-items:center}.rm-footer p{flex:1;color:var(--rm-muted);font-size:14px}.rm-footer small{color:var(--rm-muted);font-size:12px}.radius-entry{min-height:100dvh;display:grid;grid-template-columns:1fr 1fr;background:var(--rm-paper)}.rm-entry-brand{padding:36px clamp(30px,6vw,100px) 32px;background:var(--rm-green-wash);display:flex;flex-direction:column}.rm-entry-copy{margin-block:56px 28px}.rm-entry-copy .rm-kicker{margin-bottom:15px}.rm-entry-copy h2{font-size:clamp(35px,3.7vw,58px);margin:0 0 20px;line-height:1.07}.rm-entry-copy>p:last-child{max-width:37ch;font-size:16px;color:var(--rm-muted);margin:0}.rm-entry-paper{max-width:320px;margin:3px auto 25px;width:100%;transform:rotate(-3deg)}.rm-sheet-compact{padding:18px 21px 13px}.rm-sheet-compact .rm-sheet-heading{margin-top:15px}.rm-sheet-compact .rm-sheet-heading h3{font-size:24px}.rm-sheet-compact .rm-sheet-rule{margin-block:15px}.rm-sheet-compact .rm-sheet-bottom{margin-top:12px}.rm-sheet-compact .rm-sheet-note p{font-size:13px}.rm-entry-modes{display:flex;justify-content:center;gap:23px;margin-top:auto;padding-top:16px}.rm-entry-modes>span{display:flex;align-items:center;gap:7px;color:var(--rm-accent);font-size:14px}.rm-entry-modes .material-symbols-outlined{font-size:20px}.radius-entry-form{align-self:center;justify-self:center;width:min(440px,calc(100% - 80px));padding-block:60px;--cobalt: var(--rm-green);--cobalt-deep: var(--rm-green)}.radius-entry-form>div{max-width:none;background:none;border:none;border-radius:0;box-shadow:none;padding:0}.radius-entry-form h1{font:500 clamp(34px,3vw,44px)/1.12 "Space Grotesk",sans-serif;letter-spacing:-.045em}.radius-entry-form input{min-height:52px}.radius-entry-form form button[type=submit]{min-height:52px;margin-top:25px;background:var(--rm-green);color:var(--preview-on-accent,var(--token-text-on-primary));border-radius:10px}.radius-entry-form form button[type=submit]:hover{background:color-mix(in srgb,var(--rm-green) 88%,var(--rm-ink))}.radius-entry-form input:focus{border-color:var(--rm-green)}.radius-entry-form .rm-auth-heading{margin-bottom:32px;text-align:left}.radius-onboarding .rm-wordmark{margin-bottom:26px}.radius-onboarding .onboarding-heading{text-align:left}.radius-onboarding .onboarding-heading h2{font-size:clamp(29px,3.5vw,44px)}.radius-onboarding .onboarding-heading>p{max-width:52ch}.radius-onboarding .onboarding-heading label{font-size:14px;letter-spacing:0;text-transform:none}.radius-onboarding nav button{text-transform:none;letter-spacing:0;font-size:16px}.radius-onboarding.onboarding-flow{--token-text-on-primary: var(--preview-on-accent,var(--primary-foreground))}.radius-onboarding.onboarding-flow nav>button:last-child{font-size:16px;letter-spacing:0;text-transform:none}.radius-onboarding-layout{display:grid;grid-template-columns:minmax(280px,.72fr) minmax(0,1.4fr);align-items:start}.radius-onboarding-layout>.rm-entry-brand{position:sticky;top:0;min-height:calc(100dvh - 88px);padding:28px clamp(24px,3vw,50px) 40px}.radius-onboarding-layout .rm-entry-copy{margin-top:40px}.radius-onboarding-layout .rm-entry-copy h2{font-size:clamp(32px,3.3vw,48px)}.radius-onboarding-form{min-width:0;padding-top:40px}.rm-home-promise{display:flex;width:100%;gap:26px;align-items:center;justify-content:space-between;text-align:left}.rm-home-promise h3{font-size:clamp(25px,2.6vw,34px);line-height:1.2;margin:0 0 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