:root{--spacing-lg:1rem;--spacing-md:0.75rem;--spacing-sm:0.5rem;--spacing-xl:1.5rem;--spacing-xs:0.25rem;--color-scrim:var(--color-scrim-light);--spacing-2xl:2rem;--spacing-3xl:clamp(1.45rem,4vw,3rem);--spacing-4xl:clamp(1.6rem,5.33vw,4rem);--blur-level-1:6px;--blur-level-2:14px;--blur-level-3:24px;--color-accent:var(--color-accent-light);--color-border:var(--color-border-light);--font-size-lg:clamp(1.125rem,1rem + 1.2vw,1.25rem);--font-size-sm:clamp(0.8125rem,0.75rem + 0.6vw,0.9375rem);--font-size-xl:clamp(1.25rem,1.125rem + 1.6vw,1.5rem);--font-size-xs:clamp(0.6875rem,0.6rem + 0.4vw,0.8125rem);--color-neutral:var(--color-neutral-light);--color-outline:var(--color-outline-light);--color-overlay:var(--color-overlay-light);--color-primary:var(--color-primary-light);--color-surface:var(--color-surface-light);--divider-value:1px solid var(--color-neutral);--font-size-2xl:clamp(1.5rem,1.375rem + 1.8vw,1.875rem);--font-size-3xl:clamp(2.2rem,1.9rem + 2.6vw,2.75rem);--font-size-4xl:clamp(3rem,2.6rem + 3.6vw,4rem);--font-size-base:1rem;--shadow-level-1:0 6px 16px color-mix(in oklab,var(--color-neutral) 10%,transparent);--shadow-level-2:0 12px 28px color-mix(in oklab,var(--color-neutral) 14%,transparent);--shadow-level-3:0 28px 64px color-mix(in oklab,var(--color-neutral) 18%,transparent);--color-backplate:var(--color-backplate-light);--color-on-accent:var(--color-on-accent-light);--color-secondary:var(--color-secondary-light);--border-radius-lg:1.25rem;--border-radius-md:1rem;--border-radius-sm:0.5rem;--border-radius-xl:2rem;--color-on-primary:var(--color-on-primary-light);--color-on-surface:var(--color-on-surface-light);--color-scrim-dark:color-mix(in oklab,#000 65%,transparent);--font-family-body:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-weight-body:400;--line-height-body:1.6;--color-accent-dark:#ffd166;--color-border-dark:color-mix(in oklab,var(--color-surface-dark) 65%,#fff);--color-scrim-light:color-mix(in oklab,#000 65%,transparent);--content-max-width:72rem;--border-radius-card:var(--border-radius-lg);--border-radius-full:9999px;--border-radius-none:0px;--color-accent-light:#f3c12e;--color-border-light:color-mix(in oklab,var(--color-surface-light) 55%,#000);--color-neutral-dark:#2b3a44;--color-on-secondary:var(--color-on-secondary-light);--color-outline-dark:color-mix(in oklab,var(--color-surface-dark) 70%,#fff);--color-overlay-dark:color-mix(in oklab,#000 40%,transparent);--color-primary-dark:#3fd1d9;--color-surface-dark:#111318;--color-surface-tint:var(--color-surface-tint-light);--font-style-heading:normal;--font-weight-medium:600;--color-neutral-light:#bfc7ce;--color-outline-light:color-mix(in oklab,var(--color-surface-light) 70%,#000);--color-overlay-light:color-mix(in oklab,#000 40%,transparent);--color-primary-light:#096066;--color-surface-light:#fefbf6;--font-family-heading:"Nunito",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-weight-heading:700;--letter-spacing-body:0.01em;--line-height-heading:1.25;--color-backplate-dark:color-mix(in oklab,#000 55%,transparent);--color-on-accent-dark:#041217;--color-secondary-dark:#73a7ff;--dl-layout-size-large:144px;--dl-layout-size-small:48px;--dl-layout-space-unit:16px;--border-radius-control:var(--border-radius-md);--color-backplate-light:color-mix(in oklab,#000 55%,transparent);--color-on-accent-light:#111;--color-on-primary-dark:#041217;--color-on-surface-dark:#e7f2f6;--color-secondary-light:#24568d;--dl-layout-size-medium:96px;--dl-layout-size-xlarge:192px;--dl-layout-size-xsmall:16px;--font-style-subheading:normal;--color-on-primary-light:#fff;--color-on-surface-light:#0b1720;--color-surface-elevated:var(--color-surface-elevated-light);--dl-color-theme-accent1:#fff;--dl-color-theme-accent2:#f5d1b0;--dl-layout-radius-round:50%;--dl-layout-size-xxlarge:288px;--letter-spacing-heading:0;--text-transform-heading:capitalize;--color-on-secondary-dark:#041217;--color-surface-tint-dark:color-mix(in oklab,var(--color-surface-dark) 92%,var(--color-primary-dark));--dl-color-theme-primary1:#bf4408;--dl-color-theme-primary2:#e65103;--dl-layout-size-maxwidth:1400px;--color-on-secondary-light:#fff;--color-surface-tint-light:color-mix(in oklab,var(--color-surface-light) 92%,var(--color-primary-light));--dl-layout-radius-radius2:2px;--dl-layout-radius-radius4:4px;--dl-layout-radius-radius8:8px;--dl-layout-space-halfunit:8px;--dl-layout-space-sixunits:96px;--dl-layout-space-twounits:32px;--dl-color-theme-secondary1:#fff;--dl-color-theme-secondary2:#fbf1eb;--dl-layout-space-fiveunits:80px;--dl-layout-space-fourunits:64px;--color-on-surface-secondary:var(--color-on-surface-secondary-light);--dl-layout-space-threeunits:48px;--color-surface-elevated-dark:color-mix(in oklab,var(--color-surface-dark) 92%,var(--color-secondary-dark));--dashboard-content-max-width:48rem;--dl-color-theme-neutral-dark:#191818;--dl-layout-radius-cardradius:8px;--color-surface-elevated-light:color-mix(in oklab,var(--color-surface-light) 92%,var(--color-secondary-light));--dl-color-theme-neutral-light:#fbfaf9;--dl-layout-radius-imageradius:8px;--dl-layout-radius-inputradius:24px;--dl-layout-radius-buttonradius:24px;--color-on-surface-secondary-dark:#97b0bd;--dl-layout-space-oneandhalfunits:24px;--color-on-surface-secondary-light:#35505d}.teleport-show{display:flex!important;transform:none!important}.btn{gap:var(--spacing-xs);border:1px solid transparent;cursor:pointer;display:inline-flex;padding:0 var(--spacing-lg);font-size:var(--font-size-base);box-shadow:var(--shadow-level-1);box-sizing:border-box;min-height:2.75rem;text-align:center;transition:transform .12s ease,box-shadow .12s ease,background-color .2s ease-in-out,color .2s ease-in-out;align-items:center;font-family:var(--font-family-body);font-weight:var(--font-weight-medium);line-height:var(--line-height-body);-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;white-space:nowrap;border-radius:var(--border-radius-md);letter-spacing:var(--letter-spacing-body);text-transform:none;justify-content:center;text-decoration:none}.btn-primary{color:var(--color-on-primary);border-color:var(--color-primary);background-color:var(--color-primary)}.btn-secondary{color:var(--color-on-surface);border:1px solid var(--color-outline);background-color:transparent}.btn-accent{color:var(--color-on-accent);border-color:var(--color-accent);background-color:var(--color-accent)}.btn-link{color:var(--color-primary);box-shadow:none;border-color:transparent;padding-left:0;padding-right:0;text-decoration:underline;background-color:transparent}.btn-sm{padding:0 var(--spacing-sm);font-size:var(--font-size-sm);min-height:calc(2.75rem - .5rem)}.btn-lg{padding:0 var(--spacing-lg);font-size:var(--font-size-lg);min-height:calc(2.75rem + .5rem)}.btn-xl{padding:0 var(--spacing-xl);font-size:var(--font-size-xl);min-height:calc(2.75rem + 1rem)}.section-title{font-size:var(--font-size-3xl);font-style:var(--font-style-heading);letter-spacing:var(--letter-spacing-heading);text-transform:var(--text-transform-heading)}.section-subtitle,.section-title{font-family:var(--font-family-heading);font-weight:var(--font-weight-heading);line-height:var(--line-height-heading)}.section-subtitle{opacity:.85;font-size:var(--font-size-lg);font-style:var(--font-style-subheading)}.section-content{font-size:var(--font-size-base);font-family:var(--font-family-body);font-weight:var(--font-weight-body);line-height:var(--line-height-body);letter-spacing:var(--letter-spacing-body)}.hero-title{color:var(--color-on-surface);font-size:var(--font-size-4xl);font-style:var(--font-style-heading);font-family:var(--font-family-heading);font-weight:var(--font-weight-heading);line-height:var(--line-height-heading);letter-spacing:var(--letter-spacing-heading);text-transform:var(--text-transform-heading)}.hero-subtitle{opacity:.85;font-size:var(--font-size-lg);font-style:var(--font-style-subheading);font-family:var(--font-family-body);font-weight:var(--font-weight-body);line-height:var(--line-height-body)}.form-field{gap:var(--spacing-xs);display:flex;min-width:0;flex-direction:column}.form-label{color:var(--color-on-surface);font-size:var(--font-size-sm);font-family:var(--font-family-body);font-weight:var(--font-weight-medium);text-transform:none}.form-input,.form-select{color:var(--color-on-surface);width:100%;border:1px solid var(--color-border);padding:0 var(--spacing-lg);font-size:var(--font-size-base);min-width:0;background:var(--color-surface);box-sizing:border-box;min-height:2.75rem;transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;font-family:var(--font-family-body);line-height:var(--line-height-body);border-radius:var(--border-radius-md)}.form-select{cursor:pointer;-moz-appearance:none;appearance:none;padding-right:var(--spacing-xl);background-size:.65em;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;-webkit-appearance:none;background-position:right var(--spacing-md) center}.form-textarea{color:var(--color-on-surface);width:100%;border:1px solid var(--color-border);resize:vertical;padding:0 var(--spacing-lg);font-size:var(--font-size-base);min-width:0;background:var(--color-surface);box-sizing:border-box;min-height:calc(2.75rem * 2.2);transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;font-family:var(--font-family-body);line-height:var(--line-height-body);padding-top:var(--spacing-sm);border-radius:var(--border-radius-md);padding-bottom:var(--spacing-sm)}.surface-card{padding:var(--spacing-lg)}.surface-card,.surface-panel{border:1px solid var(--color-outline);box-shadow:var(--shadow-level-1);box-sizing:border-box;border-radius:var(--border-radius-card);background-color:var(--color-surface-elevated)}.surface-panel{padding:var(--spacing-xl)}.surface-media{width:100%;display:block;overflow:hidden;border-radius:var(--border-radius-sm)}.btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn:disabled{cursor:not-allowed;opacity:.6;pointer-events:none}.btn.btn-primary{color:var(--color-on-primary);border-color:var(--color-primary);background-color:var(--color-primary)}.btn.btn-secondary{color:var(--color-on-secondary);border-color:var(--color-secondary);background-color:var(--color-secondary)}.btn.btn-accent{color:var(--color-on-accent);border-color:var(--color-accent);background-color:var(--color-accent)}.btn.btn-outline{border-color:var(--color-primary)}.btn.btn-link,.btn.btn-outline{color:var(--color-primary);background-color:transparent}.btn.btn-link{border-color:transparent}.btn-primary:hover:not(:disabled){box-shadow:var(--shadow-level-2);background-color:color-mix(in oklab,var(--color-primary) 88%,var(--color-on-surface))}.btn-primary:active:not(:disabled){transform:translateY(2px);box-shadow:var(--shadow-level-1)}.btn-secondary:hover:not(:disabled){box-shadow:var(--shadow-level-2)}.btn-accent:hover:not(:disabled){background-color:color-mix(in oklab,var(--color-accent) 88%,var(--color-on-surface))}.btn-link:hover:not(:disabled){text-decoration-thickness:2px}.form-input::-moz-placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-input:-ms-input-placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-input::placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-input:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.form-input:user-invalid{border-color:#d92d20}.form-textarea::-moz-placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-textarea:-ms-input-placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-textarea::placeholder{color:color-mix(in oklab,currentColor 58%,transparent)}.form-textarea:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.form-textarea:user-invalid{border-color:#d92d20}.form-select:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.form-select:user-invalid{border-color:#d92d20}.surface-media>a,.surface-media>figure,.surface-media>picture{width:100%;height:100%;margin:0;display:block}.surface-media>a>img,.surface-media>a>video,.surface-media>figure>img,.surface-media>img,.surface-media>picture>img,.surface-media>video{width:100%;height:100%;display:block;-o-object-fit:cover;object-fit:cover}.mrpipes-footer-root{color:#fff;width:100%;padding:var(--spacing-4xl) 0 var(--spacing-2xl);overflow:visible;position:relative;box-sizing:border-box;font-family:var(--font-family-body);background-color:var(--color-on-surface)}.mrpipes-footer-scroll-container{top:0;left:50%;z-index:10;position:absolute;transform:translate(-50%,-50%)}.mrpipes-footer-inner{gap:var(--spacing-2xl);margin:0 auto;display:flex;padding:0 var(--spacing-3xl);max-width:var(--content-max-width);text-align:center;align-items:center;flex-direction:column}.mrpipes-footer-scroll-tab{color:var(--color-on-primary);width:56px;border:2px solid var(--color-outline);cursor:pointer;height:56px;display:flex;box-shadow:0 4px 0 var(--color-neutral);transition:transform .2s cubic-bezier(.34,1.56,.64,1),box-shadow .2s ease;align-items:center;border-radius:var(--border-radius-full);justify-content:center;background-color:var(--color-primary)}.mrpipes-footer-brand,.mrpipes-footer-nav{margin-bottom:var(--spacing-md)}.mrpipes-footer-nav{gap:var(--spacing-xl);display:flex;flex-wrap:wrap;justify-content:center}.mrpipes-footer-legal-stack{gap:var(--spacing-xs);display:flex;flex-direction:column}.mrpipes-footer-badge-area{margin-top:var(--spacing-md)}.mrpipes-footer-logo-link{height:40px;display:block}.mrpipes-footer-link{color:#fff;cursor:pointer;font-size:var(--font-size-sm);transition:color .2s ease;font-weight:var(--font-weight-medium);text-decoration:none}.mrpipes-footer-link-dummy{cursor:default;opacity:.5}.mrpipes-footer-copyright{margin:0;opacity:.7;font-size:var(--font-size-xs)}.mrpipes-footer-legal-links{gap:var(--spacing-md);display:flex;justify-content:center}.mrpipes-footer-trust-badge{gap:var(--spacing-sm);border:1px dashed color-mix(in srgb,#fff 30%,transparent);display:inline-flex;padding:var(--spacing-sm) var(--spacing-lg);font-size:var(--font-size-xs);background:color-mix(in srgb,var(--color-surface) 10%,transparent);align-items:center;font-weight:var(--font-weight-medium);border-radius:var(--border-radius-sm);letter-spacing:.05em;text-transform:uppercase}.mrpipes-footer-legal-item{color:#fff;opacity:.7;font-size:var(--font-size-xs);text-decoration:underline;text-underline-offset:2px}.mrpipes-footer-badge-icon{color:var(--color-secondary);width:18px;height:18px}.mrpipes-footer-scroll-tab:hover{transform:translateY(-4px);box-shadow:0 8px 0 var(--color-neutral)}.mrpipes-footer-scroll-tab:active{transform:translateY(2px);box-shadow:0 2px 0 var(--color-neutral)}.mrpipes-footer-link:hover:not(.mrpipes-footer-link-dummy){color:var(--color-primary)}.mrpipes-footer-legal-item:hover{opacity:1}.logo-variant-light{color:var(--color-primary);display:inline-flex;align-items:center;flex-shrink:0}.logo-mark{gap:var(--spacing-sm);white-space:nowrap}.logo-icon-wrapper,.logo-mark{display:flex;align-items:center}.logo-icon-wrapper{width:40px;height:40px;background:color-mix(in srgb,currentColor 10%,transparent);flex-shrink:0;border-radius:var(--border-radius-sm);justify-content:center}.logo-text-stack{display:flex;line-height:1.1;flex-direction:column}.logo-svg{width:28px;height:28px}.logo-text-primary{font-size:1.125rem;font-family:var(--font-family-heading);font-weight:800;letter-spacing:-.01em}.logo-text-secondary{opacity:.85;font-size:.75rem;font-family:var(--font-family-body);font-weight:600;letter-spacing:.05em;text-transform:uppercase}.logo-variant-dark{color:var(--color-surface);display:inline-flex;align-items:center;flex-shrink:0}.navigation-section{top:0;color:#fff;width:100%;z-index:1000;position:sticky;background:var(--color-scrim);box-sizing:border-box;transition:background-color .3s ease}.navigation-texture{inset:0;opacity:.1;z-index:1;position:absolute;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");background-repeat:repeat}.navigation-bar{margin:0 auto;display:flex;padding:var(--spacing-md) var(--spacing-3xl);z-index:2;position:relative;max-width:var(--content-max-width);min-height:4.5rem;align-items:center;justify-content:space-between}.navigation-checkbox{display:none}.navigation-mobile-overlay{color:#fff;inset:0;display:none;padding:var(--spacing-xl);z-index:1100;position:fixed;background:var(--color-scrim);box-sizing:border-box;min-height:100vh;overflow-y:auto;flex-direction:column}.navigation-left{flex-shrink:0}.navigation-right{gap:var(--spacing-2xl);display:flex;align-items:center}.navigation-overlay-header{display:flex;align-items:center;margin-bottom:var(--spacing-3xl);justify-content:space-between}.navigation-overlay-links{gap:var(--spacing-xl);display:flex;flex-direction:column}.navigation-logo-link{height:32px;display:flex;align-items:center;text-decoration:none}.navigation-desktop-links{gap:var(--spacing-xl);display:flex;align-items:center}.navigation-actions{gap:var(--spacing-lg);display:flex;align-items:center}.navigation-close{cursor:pointer;padding:var(--spacing-sm)}.navigation-overlay-link-dummy{color:#fff;opacity:.5;font-size:var(--font-size-xl);font-family:var(--font-family-heading);font-weight:var(--font-weight-heading);text-decoration:none}.navigation-overlay-divider{height:1px;margin:var(--spacing-lg) 0;background:color-mix(in srgb,#fff 20%,transparent)}.navigation-overlay-contact{gap:var(--spacing-md);color:#fff;display:flex;font-size:var(--font-size-lg);align-items:center;font-family:var(--font-family-body);font-weight:var(--font-weight-medium);text-decoration:none}.navigation-link-dummy{cursor:default;opacity:.6;transition:opacity .2s ease}.navigation-contact-link,.navigation-link-dummy{color:#fff;font-size:var(--font-size-sm);font-family:var(--font-family-body);font-weight:var(--font-weight-medium);white-space:nowrap}.navigation-contact-link{gap:var(--spacing-sm);display:flex;padding:var(--spacing-sm) var(--spacing-lg);background:color-mix(in srgb,#fff 10%,transparent);transition:background .2s ease,transform .2s ease;align-items:center;border-radius:var(--border-radius-full);text-decoration:none}.navigation-theme-btn{border:none;display:flex;background:none;transition:background .2s ease;align-items:center;border-radius:var(--border-radius-full);justify-content:center}.navigation-hamburger,.navigation-theme-btn{color:#fff;cursor:pointer;padding:var(--spacing-sm)}.navigation-hamburger,.navigation-theme-icon-sun{display:none}.navigation-theme-icon-moon{display:block}.navigation-contact-link:hover{transform:translateY(-2px);background:color-mix(in srgb,#fff 20%,transparent)}.navigation-theme-btn:hover{background:color-mix(in srgb,#fff 10%,transparent)}.pipes-hero{display:flex;padding:var(--spacing-4xl) var(--spacing-3xl);overflow:hidden;position:relative;min-height:100svh;text-align:center;align-items:center;justify-content:center;background-color:var(--color-surface)}.pipes-hero-background{inset:0;z-index:1;position:absolute;pointer-events:none}.pipes-hero-container{width:100%;z-index:2;position:relative;max-width:48rem}.pipes-hero-orbit{top:50%;left:50%;width:80vw;border:2px dashed color-mix(in srgb,var(--color-primary) 30%,transparent);height:60vh;opacity:.6;position:absolute;transform:translate(-50%,-50%);border-radius:50%}.pipes-hero-doodle{opacity:.2;position:absolute}.doodle-atom{top:10%;left:10%;transform:rotate(-15deg)}.doodle-beaker{top:15%;right:12%;transform:rotate(10deg)}.doodle-microscope{left:15%;bottom:10%;transform:rotate(5deg)}.doodle-rocket{right:10%;bottom:15%;transform:rotate(-20deg)}.pipes-hero-content{gap:var(--spacing-xl);display:flex;align-items:center;flex-direction:column}.pipes-hero-actions{margin-top:var(--spacing-lg)}.grade-links{padding:var(--spacing-4xl) var(--spacing-3xl);background-size:24px 24px;background-color:var(--color-surface-tint);background-image:radial-gradient(var(--color-neutral) 1px,transparent 1px)}.grade-links-container{margin:0 auto;max-width:var(--content-max-width)}.grade-links-grid{grid-gap:var(--spacing-2xl);gap:var(--spacing-2xl);display:grid;grid-template-columns:repeat(2,1fr)}.grade-card{display:flex;padding:var(--spacing-2xl);box-shadow:var(--shadow-level-1);transition:transform .2s ease,box-shadow .2s ease;border-radius:var(--border-radius-card);flex-direction:column;background-color:var(--color-surface-elevated);border-top-left-radius:var(--border-radius-xl)}.grade-card-header{gap:var(--spacing-xl);display:flex;flex-grow:1}.grade-card-footer{display:flex;margin-top:var(--spacing-xl)}.grade-card-icon{color:var(--color-primary);width:64px;height:64px;display:flex;background:color-mix(in srgb,var(--color-primary) 10%,transparent);align-items:center;flex-shrink:0;border-radius:var(--border-radius-md);justify-content:center}.grade-card-text{gap:var(--spacing-sm);display:flex;flex-direction:column}.grade-card-title{color:var(--color-on-surface);margin:0;font-size:var(--font-size-2xl);font-family:var(--font-family-heading)}.grade-card-description{color:var(--color-on-surface-secondary);font-size:var(--font-size-base);line-height:var(--line-height-body)}.how-to-use{padding:var(--spacing-4xl) var(--spacing-3xl);background-color:var(--color-surface)}.how-to-container{margin:0 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1fr}.teacher-editorial{position:relative;max-width:100%;min-width:0;box-sizing:border-box}.teacher-resources-rail{gap:var(--spacing-xl);display:flex;flex-direction:column}.teacher-eyebrow{color:var(--color-primary);font-size:var(--font-size-xs);font-weight:800;margin-bottom:var(--spacing-xs);letter-spacing:.1em;text-transform:uppercase}.teacher-actions{margin:var(--spacing-xl) 0}.teacher-signup{border-top:1px dashed var(--color-border);margin-top:var(--spacing-2xl);padding-top:var(--spacing-xl)}.resource-row{gap:var(--spacing-lg);display:flex;align-items:center}.teacher-help-text{color:var(--color-on-surface-secondary);font-size:var(--font-size-sm);font-style:italic;margin-top:var(--spacing-sm)}.signup-row{gap:var(--spacing-sm);display:flex;margin-top:var(--spacing-sm)}.resource-thumb{width:100px;border:1px solid var(--color-border);height:70px;overflow:hidden;flex-shrink:0;border-radius:var(--border-radius-sm)}.resource-info{gap:2px;display:flex;flex-direction:column}.resource-title{margin:0;font-size:var(--font-size-base);font-weight:700}.resource-excerpt{color:var(--color-on-surface-secondary);margin:0;font-size:var(--font-size-xs)}.time-select:focus,.topic-select:focus{outline:2px solid var(--color-primary);outline-offset:1px}.grade-pill.active{color:var(--color-on-primary);background:var(--color-primary);border-color:var(--color-primary)}.game-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-level-3)}.resource-thumb img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.games-grid>*,.teacher-panel-inner>*{min-width:0}.teacher-editorial 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var(--border-radius-md)}.btn-link-secondary{color:var(--color-primary);font-family:var(--font-family-body);font-weight:var(--font-weight-medium);text-decoration:underline}.games-hero-img{width:100%;display:block;-o-object-fit:cover;object-fit:cover;aspect-ratio:4/3;border-radius:inherit}.games-hero-doodle{color:var(--color-primary);filter:drop-shadow(2px 2px 0 var(--color-secondary));z-index:3;position:absolute}.games-hero-doodle-1{top:-20px;right:-20px}.games-hero-doodle-2{left:-20px;bottom:-20px}.browse-bar{padding:var(--spacing-3xl) var(--spacing-3xl);background:var(--color-surface-tint);border-top:1px solid var(--color-outline);border-bottom:1px solid var(--color-outline)}.browse-bar-container{gap:var(--spacing-2xl);margin:0 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.875rem;font-size:var(--font-size-base);max-width:20rem;background:var(--color-surface);box-sizing:border-box;min-height:2.75rem;font-family:var(--font-family-body);border-radius:var(--border-radius-control)}.browse-select,.duration-tag{color:var(--color-on-surface)}.duration-tag{border:1px solid var(--color-outline);padding:var(--spacing-xs) var(--spacing-lg);font-size:var(--font-size-sm);background:var(--color-surface-elevated);border-radius:var(--border-radius-full)}.games-grid-inner{margin:0 auto;max-width:var(--content-max-width)}.games-grid-header{text-align:center;margin-bottom:var(--spacing-3xl)}.portfolio-matrix{grid-gap:var(--spacing-xl);gap:var(--spacing-xl);display:grid;grid-template-columns:repeat(3,1fr)}.portfolio-card{display:flex;padding:0;transition:transform .2s ease,box-shadow .2s 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var(--spacing-md);font-size:var(--font-size-xs);background:var(--color-surface-elevated);box-shadow:var(--shadow-level-1);font-weight:var(--font-weight-medium);border-radius:var(--border-radius-sm)}.how-to-inner{margin:0 auto;max-width:var(--content-max-width)}.how-to-intro{margin:0 auto var(--spacing-3xl);max-width:36rem;text-align:center}.how-to-triptych{grid-gap:var(--spacing-3xl);gap:var(--spacing-3xl);display:grid;grid-template-columns:repeat(3,1fr)}.how-to-step{gap:var(--spacing-md);text-align:center;flex-direction:column}.how-to-icon-box,.how-to-step{display:flex;align-items:center}.how-to-icon-box{color:var(--color-primary);width:80px;border:1px solid var(--color-outline);height:80px;background:var(--color-surface-elevated);box-shadow:var(--shadow-level-1);border-radius:var(--border-radius-xl) var(--border-radius-md) var(--border-radius-md) var(--border-radius-md);margin-bottom:var(--spacing-sm);justify-content:center}.how-to-step-title{color:var(--color-on-surface);font-size:var(--font-size-lg)}.how-to-step-text{color:var(--color-on-surface-secondary);font-size:var(--font-size-sm);max-width:18rem}.browse-select:focus{outline:2px solid var(--color-primary);outline-offset:1px}.portfolio-card:hover{transform:translateY(-6px) scale(1.02);box-shadow:var(--shadow-level-3)}.browse-bar-row>*,.how-to-triptych>*,.portfolio-matrix>*{min-width:0}.browse-bar-feature img:not([class]),.browse-bar-item img:not([class]){height:auto;max-width:100%}.Content{font-size:16px;line-height:1.15;text-transform:none;text-decoration:none}.BodyFont,.Content{font-family:Inter;font-weight:400}.BodyFont{font-size:1rem;line-height:1.6;letter-spacing:.01em}.Headings{font-size:2em;font-family:Nunito;font-weight:700;line-height:1.2;letter-spacing:.02em}@media(max-width:991px){.navigation-bar{padding:var(--spacing-md) var(--spacing-xl)}.navigation-desktop-links{display:none}.grade-links-grid{grid-template-columns:1fr}.how-to-grid{grid-template-columns:1fr 1fr}.filter-bar-inner{gap:var(--spacing-lg)}.games-grid{grid-template-columns:repeat(2,1fr)}.teacher-panel-inner{grid-template-columns:1fr}.games-hero-actions{justify-content:center}.portfolio-matrix{grid-template-columns:repeat(2,1fr)}.how-to-triptych{gap:var(--spacing-xl)}}@media(max-width:767px){.mrpipes-footer-root{padding:var(--spacing-3xl) 0 var(--spacing-xl)}.mrpipes-footer-inner{padding:0 var(--spacing-xl)}.mrpipes-footer-nav{gap:var(--spacing-md);flex-direction:column}.navigation-contact-link{padding:var(--spacing-sm)}.navigation-checkbox:checked~.navigation-mobile-overlay,.navigation-hamburger{display:flex}.pipes-hero{padding:var(--spacing-3xl) var(--spacing-xl)}.pipes-hero-orbit{width:90vw}.grade-links{padding:var(--spacing-3xl) 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var(--spacing-xl)}.browse-bar-row{align-items:flex-start;grid-template-columns:1fr}.browse-bar-item-meta{justify-content:flex-start}.how-to-triptych,.portfolio-matrix{grid-template-columns:1fr}}@media(max-width:479px){.logo-icon-wrapper{width:32px;height:32px}.logo-svg{width:22px;height:22px}.logo-text-primary{font-size:1rem}.logo-text-secondary{font-size:.65rem}.navigation-bar{padding:var(--spacing-md) var(--spacing-lg)}.grade-card{padding:var(--spacing-xl)}.pipes-hero .hero-title{font-size:var(--font-size-3xl)}.games-hero-actions{width:100%;flex-direction:column}.games-hero-actions .btn{width:100%}}