/* Motion is a presentation layer, never an inspection or verification signal. */
@property --turn { syntax: '<angle>'; inherits: true; initial-value: 0deg; }
:root { --motion-ease: cubic-bezier(.2,.75,.2,1); }
.intro, .lab { animation: none; }
.intro h1 > .headline-line { display: block; color: var(--ink); overflow: hidden; padding: 0 .08em .09em 0; margin-bottom: -.09em; }
.intro h1 > .headline-line::after { content: none; }
.headline-line > span { display: block; animation: headline-in 1.1s var(--motion-ease) both; }
.headline-line:nth-child(2) > span { animation-delay: .13s; }
.hash-word { font-style: normal; color: var(--green); position: relative; display: inline-block; }
.hash-word::after { content: ''; position: absolute; bottom: -.015em; left: 0; right: 0; height: 3px; background: var(--green); transform: rotate(-2deg); transform-origin: left; animation: ink-in 1.2s .45s var(--motion-ease) both; }
.intro .eyebrow, .intro-aside { animation: soft-entry .95s .18s var(--motion-ease) both; }
.lab { animation: soft-entry 1.1s .28s var(--motion-ease) both; }
html[data-entrance-complete="true"] .lab, html[data-entrance-complete="true"] .headline-line > span, html[data-entrance-complete="true"] .hash-word::after, html[data-entrance-complete="true"] .intro .eyebrow, html[data-entrance-complete="true"] .intro-aside { animation: none; }
.intro-rule > [data-icon] { animation: direction-nudge 3s 1s ease-in-out infinite; }
.site-header nav a { position: relative; }
.site-header nav a::after { content: ''; position: absolute; height: 1px; background: currentColor; left: 0; right: 0; bottom: -7px; transform: scaleX(0); transform-origin: left; transition: transform .35s var(--motion-ease); }
.site-header nav a:hover::after, .site-header nav a:focus-visible::after { transform: scaleX(1); }
.layer-viewer { --spread: 1; --turn: 0deg; --pointer-x: 0deg; --pointer-y: 0deg; transition: --turn 1.1s var(--motion-ease); }
.layer-viewer::before { background: radial-gradient(ellipse at 50% 36%,#32654e70,transparent 62%),linear-gradient(140deg,#15251e,#0c1816); }
.model-stage { height: 390px; }
.model-rig { position: absolute; inset: 0; transform-style: preserve-3d; transform: rotateX(var(--pointer-y)) rotateY(var(--pointer-x)); transition: transform .65s var(--motion-ease); pointer-events: none; }
.layer-model { top: 52%; animation: boundary-drift 14s ease-in-out infinite; transition: transform 1.2s var(--motion-ease); }
.model-plane { transition: transform 1.2s var(--motion-ease),opacity .8s,border-color .8s,box-shadow .8s,background .8s; }
.plane-base { transform: translateZ(0); }
.plane-format { transform: translateZ(calc(36px * var(--spread))); }
.plane-cipher { transform: translateZ(calc(75px * var(--spread))); }
.plane-limit { transform: translateZ(calc(112px * var(--spread))); }
.layer-viewer[data-spread="expanded"] { --spread: 1.48; }
[data-layer="public"] .plane-format { transform: translateZ(calc(56px * var(--spread))); }
[data-layer="public"] .plane-cipher { transform: translateZ(calc(103px * var(--spread))); }
[data-layer="public"] .plane-limit { transform: translateZ(calc(135px * var(--spread))); }
[data-layer="limits"] .plane-limit { transform: translateZ(calc(116px * var(--spread))); }
.plane-cipher::after { content: ''; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(110deg,transparent 30%,#dbffe625 45%,#edfff74d 49%,transparent 60%); background-size: 260% 100%; animation: glass-pass 8s ease-in-out infinite; pointer-events: none; }
.envelope-grid i { animation: envelope-glow 5s ease-in-out infinite; }
.envelope-grid i:nth-child(3n) { animation-delay: -2.1s; }
.envelope-grid i:nth-child(3n + 1) { animation-delay: -3.3s; }
.stage-halo { animation: halo-breathe 9s ease-in-out infinite; }
.orbital-system { position: absolute; inset: 0; pointer-events: none; }
.orbital-ring { position: absolute; width: 78%; height: 53%; left: 11%; top: 27%; border: 1px solid #b0ebc52b; border-radius: 50%; transform: rotate(-26deg); }
.orbital-ring i { position: absolute; inset: -1px; border-radius: 50%; animation: orbit-particle 16s linear infinite; }
.orbital-ring i::before { content: ''; position: absolute; left: 50%; top: -2px; width: 5px; height: 5px; border-radius: 50%; background: #d0f8d9; box-shadow: 0 0 14px #b7ffca; }
.ring-two { width: 65%; height: 82%; left: 17.5%; top: 7%; transform: rotate(40deg); opacity: .45; border-style: dashed; }
.ring-two i { animation-duration: 23s; animation-direction: reverse; }
.ring-three { width: 68%; height: 37%; left: 16%; top: 41%; transform: rotate(-19deg); opacity: .55; }
.ring-three i { animation-duration: 12s; }
.data-stream { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.data-stream i { position: absolute; width: 2px; height: 2px; left: var(--x); top: var(--y); background: #b8ecc6; border-radius: 50%; animation: data-float var(--duration) var(--delay) ease-in-out infinite; opacity: 0; }
.stage-scan { position: absolute; left: 10%; right: 10%; top: 20%; bottom: 14%; overflow: hidden; pointer-events: none; opacity: 0; transition: opacity .5s; }
.stage-scan::after { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 25%; border-bottom: 1px solid #dbffe9a8; background: linear-gradient(transparent,#b8f7cb13); animation: evidence-scan 2.3s linear infinite paused; }
[data-inspecting="true"] .stage-scan { opacity: .75; }
[data-inspecting="true"] .stage-scan::after { animation-play-state: running; }
.viewer-tools { display: flex; gap: 4px; padding: 0 0 13px; border-bottom: 1px solid #b9d6bc26; margin-bottom: 14px; }
.viewer-tools button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; flex: 1; min-height: 38px; padding: 8px 5px; border: 1px solid #bddbc522; border-radius: 5px; color: #bdcfbe; font: 9px var(--mono); white-space: nowrap; transition: background .3s,color .3s,border-color .3s; }
.viewer-tools button:hover, .viewer-tools button[aria-pressed="true"] { background: #c9f3d416; border-color: #c0e9c654; color: #f0ffed; }
.viewer-tools button:focus-visible { outline-color: var(--mint); }
.viewer-tools button:disabled { opacity: .7; cursor: default; }
.motion-symbol { display: flex; align-items: center; gap: 2px; height: 12px; }
.motion-symbol i { width: 2px; height: 9px; background: currentColor; animation: bars 1.3s ease-in-out infinite; }
.motion-symbol i:nth-child(2) { animation-delay: -.4s; }
.motion-symbol i:nth-child(3) { animation-delay: -.8s; }
.spread-symbol { width: 12px; height: 12px; border-top: 1px solid; border-bottom: 1px solid; transform: rotate(-25deg); position: relative; }
.spread-symbol::before { content: ''; position: absolute; top: 4px; width: 12px; border-top: 1px solid; }
.rotate-symbol { font: 20px/10px var(--sans); }
.viewer-caption { margin-top: 0; }
.layer-explanation { animation: explanation-in .5s var(--motion-ease); }
.primary-button { position: relative; overflow: hidden; }
.primary-button::before { content: ''; position: absolute; inset: -30% -30%; background: linear-gradient(110deg,transparent 38%,#d3f9cd21 50%,transparent 62%); transform: translateX(-100%); transition: transform .85s var(--motion-ease); pointer-events: none; }
.primary-button:hover::before { transform: translateX(100%); }
.primary-button > [data-icon] { transition: transform .35s var(--motion-ease),background .35s; }
.primary-button:hover > [data-icon] { transform: rotate(-35deg); background: #d6ecd52c; }
.input-wrap { transition: border-color .3s,box-shadow .3s,background .3s; }
.input-wrap:focus-within { background: #f7fbef; box-shadow: 0 0 0 4px #2d7c5b10,0 9px 26px #173e2609; }
.byte-cloud-wrap { position: relative; overflow: hidden; }
.byte-cell { transition: opacity .55s var(--motion-ease),background .55s,transform .55s var(--motion-ease); }
.byte-cell:not(.is-dim) { transform: translateY(-1px); }
.byte-cell.is-dim { transform: scale(.8); }
.motion-arrival .byte-cell { animation: byte-arrive .8s var(--tile-delay,0ms) var(--motion-ease) backwards; }
.evidence-tabpanel:not([hidden]) { animation: evidence-entry .45s var(--motion-ease); }
.method-list article { position: relative; transition: background .4s,padding .4s var(--motion-ease); }
.method-list article::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px; background: var(--green); transform: scaleX(0); transform-origin: left; transition: transform .7s var(--motion-ease); }
.method-list article:hover::after { transform: scaleX(1); }
.boundary-asterisk { display: inline-block; transition: transform 1.4s var(--motion-ease); }
.boundary-note:hover .boundary-asterisk { transform: rotate(90deg); }
.motion-reveal.is-revealed { animation: evidence-entry .85s var(--motion-ease) both; }
.motion-reveal:nth-child(2).is-revealed { animation-delay: .08s; }
.motion-reveal:nth-child(3).is-revealed { animation-delay: .16s; }
.layer-viewer[data-in-view="false"] *, .layer-viewer[data-in-view="false"] *::before, .layer-viewer[data-in-view="false"] *::after { animation-play-state: paused !important; }
html[data-page-hidden="true"] *, html[data-page-hidden="true"] *::before, html[data-page-hidden="true"] *::after { animation-play-state: paused !important; }
html[data-motion="paused"] { scroll-behavior: auto; }
html[data-motion="paused"] *, html[data-motion="paused"] *::before, html[data-motion="paused"] *::after { animation: none !important; transition: none !important; }
html[data-motion="paused"] .layer-model { transform: translate(-50%,-34%) rotateX(53deg) rotateZ(calc(-33deg + var(--turn))); }
html[data-motion="paused"] .model-rig { transform: none; }
@keyframes headline-in { from { transform: translateY(110%) rotate(2deg); } to { transform: translateY(0) rotate(0); } }
@keyframes ink-in { from { transform: scaleX(0) rotate(-2deg); } to { transform: scaleX(1) rotate(-2deg); } }
@keyframes soft-entry { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }
@keyframes direction-nudge { 0%,30%,100% { transform: translateY(0); } 15% { transform: translateY(5px); } }
@keyframes boundary-drift { 0%,100% { transform: translate(-50%,-34%) rotateX(55deg) rotateZ(calc(-38deg + var(--turn))); } 50% { transform: translate(-50%,-39%) rotateX(49deg) rotateZ(calc(-24deg + var(--turn))); } }
@keyframes glass-pass { 0%,25% { background-position: 120% 0; } 65%,100% { background-position: -120% 0; } }
@keyframes envelope-glow { 0%,100% { background: #b8f8d308; } 50% { background: #b8f8d32b; } }
@keyframes halo-breathe { 0%,100% { opacity: .55; transform: translateX(-50%) rotate(-26deg) scale(.9); } 50% { opacity: 1; transform: translateX(-50%) rotate(-26deg) scale(1.12); } }
@keyframes orbit-particle { to { transform: rotate(360deg); } }
@keyframes data-float { 0%,100% { opacity: 0; transform: translate3d(0,20px,0); } 30%,60% { opacity: .5; } 80% { opacity: 0; transform: translate3d(18px,-52px,0); } }
@keyframes evidence-scan { from { transform: translateY(-110%); } to { transform: translateY(510%); } }
@keyframes explanation-in { from { opacity: .4; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes byte-arrive { from { transform: translate3d(0,13px,0) scale(.2); opacity: 0; } }
@keyframes evidence-entry { from { opacity: .15; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@media(min-width:1600px) { .model-stage { height: 415px; } }
@media(max-width:1200px) { .model-stage { height: 363px; } .viewer-tools button { font-size: 8px; gap: 6px; } }
@media(max-width:960px) { .viewer-tools { gap: 3px; } .viewer-tools button { font-size: 7px; gap: 5px; padding-inline: 3px; } .model-stage { height: 345px; } }
@media(max-width:740px) { .model-stage { height: 355px; } .viewer-tools button { font-size: 8px; min-height: 42px; } .orbital-ring { width: 86%; left: 7%; } .ring-two { width: 70%; left: 15%; } .ring-three { width: 75%; left: 12.5%; } .intro h1 > .headline-line { padding-bottom: .11em; margin-bottom: -.11em; } .layer-viewer[data-spread="expanded"] { --spread: 1.36; } }
@media(max-width:370px) { .model-stage { height: 325px; } .viewer-tools button { font-size: 7px; gap: 5px; } .motion-symbol { gap: 1px; } }
@media(prefers-reduced-motion:reduce) { *,*::before,*::after { animation: none !important; transition: none !important; } .model-rig { transform: none; } .layer-model { transform: translate(-50%,-34%) rotateX(53deg) rotateZ(calc(-33deg + var(--turn))); } }