/* ============================================================ PAPERS PULL — Library reveal + Kairu nudge Activates on scroll-to-bottom of papers.html. Existing page chrome (.rr-shell / .rr-side) gets transformed via --pull; the library photograph + dust particles + Kairu bar are overlay layers added by markup at the end of . ============================================================ */ :root{ --pp-pull: 0; /* 0 → 1, smoothed scroll progress (set by JS) */ --pp-pull-pe: none; /* pointer-events for the kairu bar */ --pp-lib-pan-x: -17.5%; /* horizontal pan, set by JS */ --pp-lib-scale: 1.04; /* scale, set by JS */ --pp-gold: #d4912a; --pp-gold-light: #f5a623; --pp-gold-soft: #f4d68f; --pp-paper: #faf9f6; --pp-ink: #1a2332; --pp-mute: #6e6e73; } /* ============================================================ LIBRARY LAYER — fixed at bottom, height grows with --pp-pull ============================================================ */ .pp-library-layer{ position: fixed; left: 0; right: 0; bottom: 0; height: calc(var(--pp-pull) * 100vh); z-index: 5; /* below sticky topbar (z:100), above page chrome */ pointer-events: none; overflow: hidden; will-change: height; } .pp-library-bg{ position: absolute; top: 0; bottom: 0; left: 0; width: 135%; height: 100%; background: url('../img/library-scene.jpg') center 50% / cover no-repeat; transform: translate3d(var(--pp-lib-pan-x), 0, 0) scale(var(--pp-lib-scale)); filter: saturate(0.92) contrast(1.02); will-change: transform; z-index: 1; } /* progressive WebP — overrides the JPEG when the browser supports it */ @supports (background-image: url('a.webp')){ .pp-library-bg{ background-image: url('../img/library-scene.webp'); } } .pp-library-wash{ position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, rgba(250,249,246,0.42) 0%, rgba(250,249,246,0.12) 18%, transparent 40%, transparent 70%, rgba(15,20,30,0.20) 100%), radial-gradient(ellipse 60% 80% at 0% 65%, rgba(20,30,55,0.28), transparent 65%), radial-gradient(ellipse 90% 70% at 50% 70%, transparent 30%, rgba(15,20,30,0.10) 75%, rgba(15,20,30,0.20) 100%); opacity: calc(1 - var(--pp-pull) * 0.45); z-index: 2; } .pp-library-grain{ position: absolute; inset: 0; pointer-events: none; opacity: .05; mix-blend-mode: overlay; z-index: 3; background-image: url("data:image/svg+xml;utf8,"); } /* ============================================================ AMBIENT PARTICLES — same geometry/transform as the photo so they're anchored to the library scene (pan + scale together) ============================================================ */ .pp-particles{ position: absolute; top: 0; bottom: 0; left: 0; width: 135%; height: 100%; pointer-events: none; z-index: 4; opacity: calc(min(var(--pp-pull) * 1.6, 1)); transform: translate3d(var(--pp-lib-pan-x), 0, 0) scale(var(--pp-lib-scale)); transform-origin: 50% 50%; will-change: transform; } .pp-p{ position: absolute; bottom: -12px; border-radius: 50%; background: radial-gradient(circle, rgba(255,236,182,0.95) 0%, rgba(244,214,143,0.65) 55%, rgba(244,214,143,0) 100%); animation-iteration-count: infinite; will-change: transform, opacity; } .pp-p.pp-near{ filter: blur(0.3px); box-shadow: 0 0 10px rgba(244,214,143,0.55), 0 0 18px rgba(244,214,143,0.25); } .pp-p.pp-mid { filter: blur(0.7px); box-shadow: 0 0 5px rgba(244,214,143,0.35); } .pp-p.pp-far { filter: blur(1.4px) saturate(0.9); opacity: 0.85; } @keyframes pp-drift-a{ 0% {transform:translate3d(0, 0, 0); opacity:0} 12% {opacity: var(--pp-max-op, 0.5)} 100% {transform:translate3d(8px, -110vh, 0); opacity:0}} @keyframes pp-drift-b{ 0% {transform:translate3d(0, 0, 0); opacity:0} 12% {opacity: var(--pp-max-op, 0.5)} 100% {transform:translate3d(-9px, -110vh, 0); opacity:0}} @keyframes pp-drift-c{ 0% {transform:translate3d(0, 0, 0); opacity:0} 14% {opacity: var(--pp-max-op, 0.5)} 32% {transform:translate3d(-4px, -28vh, 0)} 62% {transform:translate3d(3px, -62vh, 0)} 100% {transform:translate3d(-2px, -110vh, 0); opacity:0}} @keyframes pp-drift-d{ 0% {transform:translate3d(0, 0, 0); opacity:0} 14% {opacity: var(--pp-max-op, 0.5)} 32% {transform:translate3d(5px, -28vh, 0)} 62% {transform:translate3d(-3px, -62vh, 0)} 100% {transform:translate3d(2px, -110vh, 0); opacity:0}} @keyframes pp-drift-e{ 0% {transform:translate3d(0, 0, 0); opacity:0} 18% {opacity: var(--pp-max-op, 0.5)} 100% {transform:translate3d(2px, -110vh, 0); opacity:0}} @keyframes pp-drift-f{ 0% {transform:translate3d(0, 0, 0); opacity:0} 18% {opacity: var(--pp-max-op, 0.5)} 100% {transform:translate3d(-1px, -110vh, 0); opacity:0}} /* ============================================================ PAGE CHROME — pull effect on existing reading-room layout DESKTOP/WIDE TABLET ONLY (≥861px). Below that breakpoint the reading-room sidebar becomes a slide-in drawer that uses transform itself (translateX -100% ↔ 0); applying this pull transform there would override the drawer's open/close state and either trap it open or break the slide. So we strictly gate every chrome-modifying rule to ≥861px and let mobile behave as it always did. ============================================================ */ @media (min-width: 861px){ /* The whole grid (sidebar + main) lifts up as the library rises */ body.rr-active .rr-shell{ position: relative; z-index: 2; transform: translate3d(0, calc(var(--pp-pull) * -260px), 0); -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0, calc(1 - var(--pp-pull) * 1.2)) 0px, rgba(0,0,0, calc(1 - var(--pp-pull) * 0.6)) 60px, black 140px); mask-image: linear-gradient(180deg, rgba(0,0,0, calc(1 - var(--pp-pull) * 1.2)) 0px, rgba(0,0,0, calc(1 - var(--pp-pull) * 0.6)) 60px, black 140px); will-change: transform; } /* Sidebar leads the exit — slides left + fades */ body.rr-active .rr-side{ transform: translate3d(calc(var(--pp-pull) * -360px), 0, 0); opacity: calc(1 - var(--pp-pull) * 1.9); transition: opacity .08s linear; will-change: transform, opacity; } } /* Cross-promo lifts in the pull (safe everywhere — pure opacity) */ body.rr-active .cross-promo{ opacity: calc(1 - var(--pp-pull) * 1.6); transition: opacity .08s linear; } /* ============================================================ MOBILE LIST-DETAIL — replaces the old slide-in drawer with a simple two-state navigation: • body.mobile-list → subject list IS the page • body.mobile-detail → subject's dashboard IS the page No overlay, no drawer chrome, just one screen at a time. Back button in the topbar moves between states. ============================================================ */ @media (max-width: 860px){ /* Drop the old drawer behaviour entirely on mobile */ body.rr-active .rr-side{ position: static !important; transform: none !important; width: auto !important; height: auto !important; inset: auto !important; z-index: auto !important; border-right: none !important; overflow: visible !important; background: transparent !important; top: auto !important; } body.rr-active .rr-side-list{ overflow-y: visible !important; max-height: none !important; flex: 1 1 auto !important; } body.rr-active .rr-shell{ grid-template-columns: 1fr !important; min-height: auto !important; transform: none !important; mask-image: none !important; -webkit-mask-image: none !important; } /* Old chrome no longer needed */ .rr-mobile-bar, .rr-side-close{ display: none !important } /* Two-state visibility */ body.rr-active.mobile-detail .rr-side{ display: none !important } body.rr-active.mobile-detail .rr-main{ display: block !important } body.rr-active.mobile-list .rr-side{ display: flex !important } body.rr-active.mobile-list .rr-main{ display: none !important } /* Default render before JS sets a class — show the list */ body.rr-active:not(.mobile-detail):not(.mobile-list) .rr-main{ display: none !important } /* Tap-friendly list */ body.rr-active .rr-side-item{ padding: 13px 16px 13px 14px !important; font-size: 15px !important; border-bottom: 1px solid var(--rr-border); min-height: 48px; } body.rr-active .rr-side-item::after{ content: "›"; margin-left: 8px; color: var(--rr-text-tertiary); font-size: 22px; line-height: 1; font-weight: 400; } body.rr-active .rr-side-item.no-sols::after{ content: "›"; width: auto; height: auto; background: transparent; border-radius: 0; opacity: 1; } body.rr-active .rr-side-section{ padding: 12px 0 0 !important } body.rr-active .rr-side-section-head{ padding: 10px 18px 6px !important; font-size: 11px !important; } body.rr-active .rr-side-head{ padding: 14px 16px 8px !important; border-bottom: 1px solid var(--rr-border); } body.rr-active .rr-side-foot{ padding: 14px 16px 24px } body.rr-active .rr-recents-flyout{ display: none } /* Mobile detail topbar — swap "‹ Home" for "‹ Subjects" */ .rr-topbar-back-subjects{ display: none } body.rr-active.mobile-detail .rr-topbar-back-home{ display: none !important } body.rr-active.mobile-detail .rr-topbar-back-subjects{ display: inline-flex !important } /* Compress topbar context on mobile detail (so there's room) */ body.rr-active.mobile-detail .rr-topbar-stats{ display: none !important } } @media (min-width: 861px){ .rr-topbar-back-subjects{ display: none !important } } /* Topbar dims slightly so the library reads as the dominant surface */ body.rr-active .rr-topbar, body.rr-active .top-nav{ background: rgba(255,255,255, calc(0.92 - var(--pp-pull) * 0.05)); transition: background-color .15s linear; } /* ============================================================ KAIRU BAR — opaque solid card, slides up + fades in. Whole card is the click target. No close button. ============================================================ */ .pp-kairu-bar{ position: fixed; left: 0; right: 0; /* env() respects iPhone home-indicator + notched displays; fallback 0 on other devices */ bottom: calc(var(--pp-pull) * 22vh + 16px + env(safe-area-inset-bottom, 0px)); z-index: 50; transform: translate3d(0, calc((1 - var(--pp-pull)) * 60px), 0); opacity: var(--pp-pull); pointer-events: var(--pp-pull-pe); transition: opacity .18s linear; will-change: transform, opacity, bottom; } .pp-kairu-inner{ margin: 0 auto; max-width: 760px; background: #fffdf6; border: 1px solid rgba(212,163,65,0.32); border-radius: 16px; box-shadow: 0 1px 0 rgba(255,255,255,0.9) inset, 0 0 0 1px rgba(212,163,65,0.08) inset, 0 26px 70px -16px rgba(15,20,30,0.55), 0 8px 20px -10px rgba(15,20,30,0.30); padding: 14px 16px 14px 14px; display: flex; align-items: center; gap: 14px; position: relative; overflow: hidden; cursor: pointer; font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif; transition: transform .18s ease, box-shadow .25s ease; } .pp-kairu-inner:hover{ transform: translateY(-2px); box-shadow: 0 1px 0 rgba(255,255,255,0.9) inset, 0 0 0 1px rgba(212,163,65,0.14) inset, 0 30px 78px -14px rgba(15,20,30,0.60), 0 10px 22px -10px rgba(15,20,30,0.34); } .pp-kairu-inner::before{ content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse 70% 110% at 0% 50%, rgba(212,163,65,0.10), transparent 60%), linear-gradient(180deg, rgba(255,255,255,0.5) 0%, transparent 30%); } .pp-kairu-bar.pp-arrived .pp-kairu-cta::after{ content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: linear-gradient(110deg, transparent 30%, rgba(255,253,247,0.65) 50%, transparent 70%); transform: translateX(-130%); animation: pp-cta-sheen 4.5s ease-in-out 1.2s infinite; } @keyframes pp-cta-sheen{ 0% { transform: translateX(-130%) } 35% { transform: translateX(130%) } 100% { transform: translateX(130%) } } .pp-kairu-svg-wrap{ width: 50px; height: 50px; flex: none; position: relative; z-index: 1; pointer-events: none; } .pp-kairu-svg-wrap svg{ width: 100%; height: 100%; display: block; overflow: visible; filter: drop-shadow(0 2px 5px rgba(15,20,30,0.30)); } /* Kairu hop / shadow / blink — verbatim from physics-formula-mastery */ @keyframes pp-kairu-hop{ 0%{transform:translateY(0) scaleY(1) scaleX(1)} 8%{transform:translateY(0) scaleY(.84) scaleX(1.12)} 28%{transform:translateY(-11px) scaleY(1.1) scaleX(.94)} 52%{transform:translateY(-14px) scaleY(1.04) scaleX(.98)} 72%{transform:translateY(-3px) scaleY(.9) scaleX(1.08)} 88%{transform:translateY(0) scaleY(1.02) scaleX(.98)} 100%{transform:translateY(0) scaleY(1) scaleX(1)}} @keyframes pp-kairu-shadow{ 0%,100%{transform:scaleX(1);opacity:.18} 30%,55%{transform:scaleX(.55);opacity:.08} 72%{transform:scaleX(1.12);opacity:.22}} @keyframes pp-kairu-blink{ 0%,92%,100%{transform:scaleY(1)} 95%,99%{transform:scaleY(.08)}} .pp-kairu-svg-wrap #ppKairuBird { transform-origin: 32px 50px; transform-box: fill-box } .pp-kairu-svg-wrap #ppKairuWing { transform-origin: 23px 34px; transform-box: fill-box } /* Eye + shadow pivot from their own centres. With transform-box: fill-box the element's bounding box is the reference, so 50%/50% lands at the centre of that small box — the blink stays where the eye actually is. (Pixel coords like 42px/22px would be measured from the bbox top-left, which puts the pivot far outside the tiny eye and flings it off the face when scaled.) */ .pp-kairu-svg-wrap #ppKairuEye { transform-origin: 50% 50%; transform-box: fill-box; animation: pp-kairu-blink 5.5s ease-in-out infinite } .pp-kairu-svg-wrap #ppKairuShadow { transform-origin: 50% 50%; transform-box: fill-box } .pp-kairu-msg{ flex: 1; min-width: 0; font-size: 14px; line-height: 1.4; letter-spacing: -.005em; color: var(--pp-ink); font-weight: 500; position: relative; z-index: 1; } .pp-kairu-msg .pp-tag{ display: inline-block; font-style: italic; font-size: 12px; color: var(--pp-gold); letter-spacing: .02em; margin-right: 4px; font-weight: 500; } .pp-kairu-msg .pp-text{ display: inline-block; transition: opacity .35s ease; will-change: opacity; } .pp-kairu-msg .pp-text.pp-fading{ opacity: 0 } .pp-kairu-cta{ flex: none; background: var(--pp-gold); color: #1a1300; border: 0; border-radius: 10px; padding: 9px 14px; font: 600 13px/1 'Poppins', sans-serif; letter-spacing: -.005em; cursor: pointer; box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset, 0 6px 14px -6px rgba(212,163,65,0.55); text-decoration: none; display: inline-flex; align-items: center; gap: 5px; position: relative; z-index: 1; overflow: hidden; transition: background .15s ease, transform .15s ease; } .pp-kairu-cta:hover{ background: var(--pp-gold-light); transform: translateY(-1px) } /* return-to-papers chevron — appears at full pull at the very top */ .pp-return-hint{ position: fixed; left: 50%; top: 70px; z-index: 45; transform: translate(-50%, calc((1 - var(--pp-pull)) * -20px)); opacity: calc(max(0, var(--pp-pull) - 0.85) * 6.5); pointer-events: none; font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,0.85); font-weight: 600; text-shadow: 0 2px 8px rgba(0,0,0,0.4); } /* responsive */ @media (max-width: 640px){ .pp-kairu-inner{ margin: 0 12px; flex-wrap: wrap } .pp-kairu-msg{ order: 2; flex-basis: 100%; font-size: 13px } .pp-kairu-cta{ order: 3; flex: 1; justify-content: center } } /* Reduced motion: desktop-only chrome reset (so we don't fight the mobile drawer's transform) */ @media (prefers-reduced-motion: reduce) and (min-width: 861px){ body.rr-active .rr-shell, body.rr-active .rr-side{ transform: none !important; opacity: 1 !important; mask-image: none !important; -webkit-mask-image: none !important } } @media (prefers-reduced-motion: reduce){ .pp-library-layer{ height: 0 !important } .pp-kairu-bar{ display: none } .pp-kairu-svg-wrap *{ animation: none !important } .pp-p{ animation: none !important; opacity: 0 !important } }