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.surface-well{background:var(--sml-visual-canvas)}:focus-visible{outline:var(--sml-focus-ring);outline-offset:var(--sml-focus-offset)}@media (max-width:40rem){.tt-reflow thead{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.tt-reflow tr{border:1px solid var(--sml-border);border-radius:var(--sml-radius);margin-bottom:.75rem;padding:.5rem .75rem;display:block}.tt-reflow td,.tt-reflow th[scope=row]{text-align:right;justify-content:space-between;gap:1rem;padding:.35rem 0;display:flex}.tt-reflow th[scope=row]{font-weight:700}.tt-reflow td:before,.tt-reflow th[scope=row]:before{content:attr(data-label);text-align:left;color:var(--sml-muted);font-weight:600}}.sb-surface{--sb-measure:48rem;background:var(--sml-bg);width:100%;min-height:100%;color:var(--sml-text);flex-direction:column;gap:clamp(1rem,2.5vh,2rem);padding:clamp(1rem,3vw,2.5rem);display:flex}.sb-surface:focus{outline:none}.sb-surface:focus-visible{outline:var(--sml-focus-ring);outline-offset:calc(var(--sml-focus-offset) * -1)}.sb-context,.sb-title,.sb-goal,.sb-board,.sb-support,.sb-controls,.sb-tools,.sb-notices{width:100%;max-width:var(--sb-measure);margin-inline:auto}.sb-context{color:var(--sml-muted);letter-spacing:.02em;font-size:clamp(.9rem,1.4vw,1.25rem);font-weight:600}.sb-title{font-size:clamp(1.6rem,3.6vw,3rem);font-weight:800;line-height:1.15}.sb-goal{color:var(--sml-muted);font-size:clamp(1rem,1.8vw,1.5rem)}.sb-board{padding-block:clamp(.5rem,2vh,1.5rem)}.sb-figure{background:var(--sml-surface-well,#00000008);border:1px solid var(--sml-border,#0000001f);border-radius:.75rem;width:100%;max-width:clamp(30rem,55vw,46rem);margin-block:clamp(.5rem,1.5vh,1rem);margin-inline:auto;padding:clamp(.5rem,1.5vh,1rem)}.sb-figure svg{aspect-ratio:8/5;width:100%;height:auto;display:block}.sb-text-board{overflow-wrap:anywhere;font-size:clamp(1.5rem,3.2vw,2.75rem);font-weight:600;line-height:1.3}.sb-math-board{margin-block:clamp(.5rem,1.5vh,1.25rem);font-size:clamp(1.75rem,4vw,3.5rem)}.sb-text-support{overflow-wrap:anywhere;font-size:clamp(1.1rem,2vw,1.75rem);line-height:1.4}.sb-math-support{margin-block:.5rem;font-size:clamp(1.25rem,2.4vw,2rem)}[role=math],.math-scroll{vertical-align:middle;max-width:100%;display:inline-block;overflow:auto hidden}.sb-support{flex-direction:column;gap:clamp(.75rem,1.5vh,1.25rem);display:flex}.sb-section-heading{text-transform:uppercase;letter-spacing:.06em;color:var(--sml-muted);font-size:clamp(.9rem,1.3vw,1.125rem);font-weight:700}.sb-panel{border-inline-start:6px solid var(--sml-primary);background:var(--sml-surface);border-radius:var(--sml-radius);padding:clamp(.75rem,1.5vw,1.25rem) clamp(.75rem,2vw,1.5rem)}.sb-panel-heading{margin-bottom:.35rem;font-size:clamp(1rem,1.5vw,1.375rem);font-weight:700}.sb-controls{flex-wrap:wrap;align-items:center;gap:clamp(.5rem,1vw,1rem);display:flex}.sb-control{border:2px solid var(--sml-border);border-radius:var(--sml-radius);background:var(--sml-surface);min-width:3.5rem;min-height:3.5rem;color:var(--sml-text);justify-content:center;align-items:center;padding:.75rem 1.25rem;font-size:clamp(1rem,1.5vw,1.25rem);font-weight:600;display:inline-flex}.sb-control-primary{background:var(--sml-primary);color:var(--sml-on-primary);border-color:#0000}.sb-control-link{text-decoration:underline}.sb-tools{border-top:1px solid var(--sml-border);flex-direction:column;gap:.75rem;padding-top:clamp(.5rem,1.5vh,1rem);display:flex}.sb-timer-readout{flex-wrap:wrap;align-items:baseline;gap:.75rem;display:flex}.sb-timer-value{font-variant-numeric:tabular-nums;font-size:clamp(1.5rem,2.6vw,2.25rem);font-weight:700}.sb-timer-status{color:var(--sml-muted);font-size:clamp(.9rem,1.3vw,1.125rem)}.sb-note{color:var(--sml-muted);max-width:60ch;font-size:clamp(.9rem,1.3vw,1.125rem)}.sb-help-summary{min-height:var(--sml-touch-target);cursor:pointer;align-items:center;font-weight:600;display:inline-flex}.sb-help-list{margin-top:.5rem}.sb-help-row{flex-wrap:wrap;gap:.5rem 1.5rem;padding-block:.25rem;display:flex}.sb-help-row dt{min-width:14rem;font-weight:700}.sb-notices{border-top:1px solid var(--sml-border);padding-top:clamp(.5rem,1.5vh,1rem)}.sb-notice-strong{font-size:clamp(.95rem,1.4vw,1.25rem);font-weight:700}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}:root[data-reduced-motion=reduced] *,:root[data-reduced-motion=reduced] :before,:root[data-reduced-motion=reduced] :after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.t-display{letter-spacing:-.02em;font-size:clamp(2.25rem,1.4rem + 3.4vw,3.75rem);font-weight:800;line-height:1.05}.t-title{letter-spacing:-.015em;font-size:clamp(1.75rem,1.3rem + 1.8vw,2.5rem);font-weight:800;line-height:1.12}.t-section{letter-spacing:-.01em;font-size:clamp(1.375rem,1.15rem + .9vw,1.75rem);font-weight:700;line-height:1.2}.t-card{font-size:1.125rem;font-weight:700;line-height:1.3}.t-body{font-size:1rem;line-height:1.6}.t-lead{font-size:clamp(1.05rem,1rem + .4vw,1.25rem);line-height:1.55}.t-support{color:var(--sml-muted);font-size:.9375rem;line-height:1.55}.t-caption{color:var(--sml-muted);font-size:.8125rem;line-height:1.4}.t-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:var(--sml-accent-strong);font-size:.8125rem;font-weight:700}.surface-card{background:var(--sml-surface-raised);color:var(--sml-text);border:1px solid var(--sml-border);border-radius:var(--sml-radius-lg);box-shadow:var(--sml-shadow-sm)}.surface-flat{background:var(--sml-surface);color:var(--sml-text);border:1px solid var(--sml-border);border-radius:var(--sml-radius-lg)}.surface-well{background:var(--sml-surface-sunken);color:var(--sml-text);border:1px solid var(--sml-border);border-radius:var(--sml-radius-lg)}.lift{transition:transform var(--sml-dur) var(--sml-ease), box-shadow var(--sml-dur) var(--sml-ease), border-color var(--sml-dur) var(--sml-ease)}.lift:hover{box-shadow:var(--sml-shadow-md);border-color:var(--sml-primary);transform:translateY(-2px)}.hero-canvas{background:radial-gradient(120% 120% at 100% 0%, var(--sml-hero-to) 0%, transparent 60%), linear-gradient(160deg, var(--sml-hero-from), var(--sml-surface));border:1px solid var(--sml-border);border-radius:var(--sml-radius-xl)}@keyframes sml-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.animate-rise{animation:sml-rise var(--sml-dur-slow) var(--sml-ease-out) both}.focus-token:focus-visible{outline:var(--sml-focus-ring);outline-offset:var(--sml-focus-offset)}:root{--sml-stage-from:#0d2a43;--sml-stage-to:#10405b;--sml-stage-ink:#eef4fb;--sml-stage-muted:#aac4dc;--sml-stage-border:#ffffff29;--sml-stage-rail:#fff3;--sml-stage-rail-fill:#38bdf8;--sml-stage-glow:#38bdf829}@media (prefers-color-scheme:dark){:root:not([data-theme=light]):not([data-theme=high-contrast]){--sml-stage-from:#071722;--sml-stage-to:#0b2433;--sml-stage-ink:#e8eef4;--sml-stage-muted:#9db2c6;--sml-stage-border:#ffffff1f;--sml-stage-rail:#ffffff29;--sml-stage-rail-fill:#38bdf8;--sml-stage-glow:#38bdf829}}:root[data-theme=dark]{--sml-stage-from:#071722;--sml-stage-to:#0b2433;--sml-stage-ink:#e8eef4;--sml-stage-muted:#9db2c6;--sml-stage-border:#ffffff1f;--sml-stage-rail:#ffffff29;--sml-stage-rail-fill:#38bdf8;--sml-stage-glow:#38bdf829}:root[data-theme=high-contrast]{--sml-stage-from:#000;--sml-stage-to:#000;--sml-stage-ink:#fff;--sml-stage-muted:#fff;--sml-stage-border:#fff;--sml-stage-rail:#fff;--sml-stage-rail-fill:#ff0;--sml-stage-glow:transparent}:root[data-deployment=mathnexa]:not([data-theme=dark]):not([data-theme=high-contrast]){--sml-stage-from:#e7f4f1;--sml-stage-to:#f8f6ef;--sml-stage-ink:#0b2945;--sml-stage-muted:#4f6576;--sml-stage-border:#b9d4ce;--sml-stage-rail:#cfe4df;--sml-stage-rail-fill:#00746c;--sml-stage-glow:#b947431a}.practice-stage{background:radial-gradient(120% 140% at 100% 0%, var(--sml-stage-glow) 0%, transparent 55%), linear-gradient(160deg, var(--sml-stage-from), var(--sml-stage-to));width:100%;color:var(--sml-stage-ink);padding:clamp(1rem,.85rem + 1.7vw,2.25rem);position:relative;overflow:hidden}:root[data-theme=high-contrast] .practice-stage{border-block:2px solid var(--sml-stage-border);background:#000}.practice-stage-inner{width:100%;max-width:1500px;margin-inline:auto}.practice-stage-title{color:var(--sml-stage-ink)}.practice-stage-intro{color:var(--sml-stage-muted)}.practice-stage-link{color:var(--sml-stage-ink);font-weight:600;text-decoration:underline}.practice-stage-link:hover{opacity:.85}.stage-progress .t-caption{color:var(--sml-stage-muted)}.stage-progress [role=progressbar]{background:var(--sml-stage-rail);border-color:var(--sml-stage-border)}.stage-progress [role=progressbar]>div{background:var(--sml-stage-rail-fill)}.math-lab-launch{min-height:var(--sml-touch-target);color:var(--sml-stage-ink);border:1px solid var(--sml-stage-border);border-radius:var(--sml-radius-pill);transition:background var(--sml-dur) var(--sml-ease);background:#ffffff1a;justify-content:center;align-items:center;gap:.5rem;padding-inline:1rem;font-weight:700;display:inline-flex}.math-lab-launch:hover{background:#ffffff2e}:root[data-deployment=mathnexa]:not([data-theme=dark]):not([data-theme=high-contrast]) .math-lab-launch{color:var(--sml-text);background:#ffffffc2}:root[data-deployment=mathnexa]:not([data-theme=dark]):not([data-theme=high-contrast]) .math-lab-launch:hover{background:#fff}:root[data-theme=high-contrast] .math-lab-launch{color:#fff;background:#000;border-color:#fff}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@property --tw-content{syntax:"*";inherits:false;initial-value:""}