/* Keep reader surfaces scoped; share element visuals with the friend preview. */
body.messages-theme dialog.reading-experience[data-presentation=detail]{--reader-bg:#fff;--reader-ink:#1d1d1f;--reader-muted:#62626c;--reader-line:#dfe2e8;background:var(--reader-bg);color:var(--reader-ink)}
body.messages-theme dialog.reading-experience[data-reading-side=dark]{--reader-bg:#252833;--reader-ink:#f5f6fa;--reader-muted:#c1c5d1;--reader-line:#555b6a;color-scheme:dark}
body.messages-theme dialog.reading-experience[data-presentation=detail] .report-modal-head{display:grid;grid-template-columns:44px 1fr 44px;gap:8px;background:var(--reader-bg);color:var(--reader-ink);border:0;padding:12px 20px}
.reading-experience .report-modal-head h2{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
body.messages-theme dialog.reading-experience[data-presentation=detail] .report-modal-head .ui-back{position:static;grid-column:1;grid-row:1;align-self:center}
.reading-mode-ely{position:relative;display:block;grid-column:2;grid-row:1;justify-self:center;width:52px;height:52px;flex:none}
.reading-mode-ely img{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:contain;transition:opacity 180ms ease;pointer-events:none}
.reading-mode-ely .reading-mode-ely-dark{opacity:0}
.reading-experience[data-reading-side=dark] .reading-mode-ely-light{opacity:0}
.reading-experience[data-reading-side=dark] .reading-mode-ely-dark{opacity:1}
@media(prefers-reduced-motion:reduce){.reading-mode-ely img{transition:none}}
.reading-mode-switch{grid-column:2;display:flex;justify-self:center;gap:4px;border:1px solid var(--reader-line);border-radius:28px;padding:3px;background:color-mix(in srgb,var(--reader-bg),transparent 12%)}
.reading-mode-switch button{min-height:44px;padding:0 22px;border:0;border-radius:24px;background:transparent;color:var(--reader-muted);font:inherit;font-size:16px;cursor:pointer}
.reading-mode-switch button[aria-pressed=true]{background:color-mix(in srgb,var(--reader-ink) 12%,var(--reader-bg));color:var(--reader-ink)}
.reading-experience .report-reader-body,.reading-dark-preview{background:var(--reader-bg);color:var(--reader-ink)}
.reading-dark-preview{max-width:640px;margin:0 auto;padding:48px 24px;text-align:center;line-height:1.6}
.reading-dark-preview h3{font-size:clamp(24px,5vw,36px);line-height:1.2}
.reading-dark-preview p{color:var(--reader-muted)}
.reading-experience [hidden]{display:none!important}
.invite-preview-people .reading-element-orb,.reading-experience .reading-element-orb,body.messages-theme #friendChoiceDialog .friend-match-icon.reading-element-orb{position:relative;display:block;width:var(--orb-size,88px);height:var(--orb-size,88px);border-radius:50%;background:radial-gradient(circle at 28% 22%,var(--orb-light),var(--orb-mid) 20%,var(--orb-base) 58%,var(--orb-deep));box-shadow:inset -8px -10px 17px #15272b25,0 12px 24px -14px var(--orb-base)}
body.messages-theme #friendChoiceDialog .friend-match-icon.reading-element-orb{--orb-size:56px}
/* Match the approved prototype: Dark reveals a crescent of the same element. */
.reading-experience[data-reading-side=dark] .reading-element-orb{overflow:hidden}
.reading-experience[data-reading-side=dark] .reading-element-orb::after{content:'';position:absolute;inset:0;border-radius:50%;background:var(--reader-bg);transform:translate(26%,-16%);pointer-events:none}
.reading-element-orb[data-element=wood]{--orb-light:#edfff1;--orb-mid:#a5dfb3;--orb-base:#65be85;--orb-deep:#28754b}
.reading-element-orb[data-element=fire]{--orb-light:#fff5d5;--orb-mid:#ffc081;--orb-base:#ff6967;--orb-deep:#bd342d}
.reading-element-orb[data-element=earth]{--orb-light:#fffbe7;--orb-mid:#ffe8a0;--orb-base:#ffd349;--orb-deep:#ad7b20}
.reading-element-orb[data-element=metal]{--orb-light:#fff;--orb-mid:#edf1f2;--orb-base:#cad3d6;--orb-deep:#758693}
.reading-element-orb[data-element=water]{--orb-light:#eef7ff;--orb-mid:#afd3ff;--orb-base:#4c91f2;--orb-deep:#175ac1}
/* Authorized Light and Dark bodies share the same hierarchy and contrast. */
body.messages-theme dialog.reading-experience .report-reader-body :is(h3,p,summary,.report-person-name,.report-chapter-label){color:var(--reader-ink)}
body.messages-theme dialog.reading-experience .report-reader-body :is(.report-note,.report-chapter-label,.report-person-name){color:var(--reader-muted)}
body.messages-theme dialog.reading-experience :is(.report-chapter,.report-reader-end,.report-contents){border-color:var(--reader-line)}
body.messages-theme dialog.reading-experience .report-chapter{background:transparent}
.reading-dark-preview ol{text-align:left;padding-left:24px;margin:28px 0;color:var(--reader-muted)}
.reading-dark-preview li{margin:12px 0}
body.messages-theme dialog.reading-experience .reading-dark-preview .primary{display:block;width:100%;min-height:48px;margin-top:18px;border:0;border-radius:26px;background:#007aff;color:white;padding:12px 20px;font:inherit;cursor:pointer}
.reading-mode-switch button:disabled{cursor:wait;opacity:.7}

/* Element-specific surface treatments from the approved prototype. */
.reading-element-orb::before{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:.65}
.reading-element-orb[data-element=wood]::before{background:linear-gradient(105deg,transparent 35%,#efffe91a 39%,transparent 43%,transparent 60%,#efffe927 63%,transparent 66%)}
.reading-element-orb[data-element=fire]::before{background:radial-gradient(ellipse at 45% 110%,#fff0aab3,transparent 62%),linear-gradient(35deg,transparent 25%,#ffe8ae4d 42%,transparent 60%)}
.reading-element-orb[data-element=earth]::before{background:radial-gradient(ellipse at 50% 110%,#a4752426,transparent 60%),linear-gradient(165deg,transparent 25%,#fff8d326 40%,transparent 70%)}
.reading-element-orb[data-element=metal]::before{opacity:1;background:linear-gradient(115deg,transparent 18%,#ffffffa6 34%,#64748433 43%,#fff8 55%,transparent 68%)}
.reading-element-orb[data-element=water]::before{background:radial-gradient(ellipse at 70% -15%,transparent 46%,#ffffff30 49%,transparent 53%,transparent 60%,#ffffff20 63%,transparent 66%)}
.reading-element-orb{animation:reading-orb-arrive .24s ease-out}
@keyframes reading-orb-arrive{from{opacity:.6;transform:scale(.95)}to{opacity:1;transform:none}}
.report-element-label{display:block;font-size:13px;line-height:1.6;color:var(--reader-muted);margin-top:6px}
.reading-experience .report-feedback{text-align:center;margin:32px 0 48px}
.reading-experience .report-feedback>div{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}
.reading-experience .report-feedback button{min-height:44px;padding:8px 18px;border:1px solid var(--reader-line);border-radius:24px;background:transparent;color:var(--reader-ink);font:inherit;cursor:pointer}
.reading-experience .report-feedback button[aria-pressed=true]{background:var(--reader-ink);color:var(--reader-bg)}
.reading-credit-bubble{display:inline-block;padding:5px 10px;border-radius:10px;background:#e7effc;color:#273c5b;font-size:13px}
@media(prefers-reduced-motion:reduce){.reading-element-orb{animation:none}}
body.messages-theme .reading-experience .report-feedback,body.messages-theme .reading-experience .report-feedback p,body.messages-theme .reading-experience .report-feedback button{font-size:16px;line-height:1.6}
.report-ely-form{position:relative;display:inline-block}
.report-ely-light::before{content:'';position:absolute;z-index:1;left:27%;top:0;width:46%;height:12%;border:2px solid #ffe8a0;border-radius:50%;box-shadow:0 0 9px #ffe8a080;transform:rotate(-12deg);pointer-events:none}
/* Keep the surface and the preloaded Ely layers on the same transition beat. */
body.messages-theme dialog.reading-experience,
body.messages-theme dialog.reading-experience .report-modal-head,
.reading-experience .report-reader-body,
.reading-experience .reading-dark-preview,
.reading-mode-switch button{transition:background-color 180ms ease,color 180ms ease}
@media(prefers-reduced-motion:reduce){body.messages-theme dialog.reading-experience,body.messages-theme dialog.reading-experience .report-modal-head,.reading-experience .report-reader-body,.reading-experience .reading-dark-preview,.reading-mode-switch button{transition:none}}

/* A single selection pill slides between equal-sized tabs. */
.reading-mode-switch{position:relative;isolation:isolate;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));min-width:196px}
.reading-mode-switch::before{content:'';position:absolute;z-index:0;left:4px;top:4px;bottom:4px;width:calc((100% - 12px)/2);border-radius:24px;background:color-mix(in srgb,var(--reader-ink) 12%,var(--reader-bg));transform:translateX(0);transition:transform 260ms cubic-bezier(.22,.7,.2,1),background-color 180ms ease;pointer-events:none}
.reading-experience[data-reading-side=dark] .reading-mode-switch::before{transform:translateX(calc(100% + 4px))}
.reading-mode-switch button{position:relative;z-index:1;padding-inline:18px}
.reading-mode-switch button[aria-pressed=true]{background:transparent}
body.messages-theme dialog.reading-experience{overflow-x:hidden}
@media(prefers-reduced-motion:reduce){.reading-mode-switch::before{transition:none}}