/* Interaction layer (2026-10-08), loaded last on every page: motion tokens, hover / press / focus states, the account menu,
   theme toggle, sticky section nav, entrance and loading motion. prefers-reduced-motion switches all motion off. */
:root{--ease:cubic-bezier(.2,.7,.1,1);--ease-out:cubic-bezier(.16,1,.3,1);--dur:.18s;--acct-seal:#a8322a;--acct-seal-ink:#fff8ef;--shadow-pop:0 22px 48px -18px rgba(52,30,14,.32),0 2px 8px rgba(52,30,14,.06)}
:root[data-theme=dark]{--acct-seal:#c0473a;--acct-seal-ink:#fff3ea;--shadow-pop:0 22px 48px -14px rgba(0,0,0,.7),0 2px 8px rgba(0,0,0,.35)}
html{scroll-behavior:smooth;-webkit-tap-highlight-color:transparent;scrollbar-color:color-mix(in srgb,var(--muted) 40%,transparent) transparent}
body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
::selection{background:color-mix(in srgb,var(--blue) 20%,transparent)}
.table-scroll,.suggestions,.viz-sankey{scrollbar-width:thin}

/* Controls: every state change eases; presses give; focus rings stay crisp and cinnabar. */
button,select,.button,a.button{transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),opacity var(--dur),transform .14s var(--ease)}
button:not(:disabled):active,a.button:active{transform:scale(.97)}
.stock-button:active,.stock-cell:active,th button:active,td button:active,.viz button:active{transform:none}
input,select,textarea{transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
input:hover,select:hover,textarea:hover{border-color:color-mix(in srgb,var(--muted) 50%,var(--line))}
input:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 18%,transparent)}
button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:5px}
.research button.primary:not(:disabled):hover{background:color-mix(in srgb,var(--blue) 88%,#000);border-color:color-mix(in srgb,var(--blue) 88%,#000);color:var(--surface)}
summary{cursor:pointer;transition:color var(--dur)}summary:hover{color:var(--blue)}
a{transition:color var(--dur) var(--ease)}

/* Sidebar: soft hover wash, icon nudge, the current-page mark draws in; the seal tilts on hover. */
.site-nav a{transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease)}
.site-nav a:not([aria-current]):hover{background:color-mix(in srgb,var(--ink) 5%,transparent);color:var(--ink)}
.site-nav a>svg:first-child{transition:transform .3s var(--ease-out)}
.site-nav a[aria-current]:before{animation:cev-mark .5s var(--ease-out) both}
.brand img{transition:transform .6s var(--ease-out)}

/* Rows and tables: hover wash fades in instead of snapping. */
.rank-row,tbody tr,tbody tr>*{transition:background-color .15s var(--ease)}
.pick-row:not(.is-open):hover>*{background:var(--raised)}
.chip{transition:border-color var(--dur),color var(--dur),background-color var(--dur)}

/* Tabs and segmented controls: the selected pill settles in. */
.tabs button[aria-selected=true],.seg button[aria-pressed=true]{animation:cev-settle .28s var(--ease-out)}

/* Live numbers: a brief wash in the direction of the change (A-share colours: red up, green down). */
.tick-up,.tick-down{border-radius:4px;animation:cev-tick 1.4s var(--ease) both}
.tick-up{--tick:color-mix(in srgb,var(--up) 18%,transparent)}.tick-down{--tick:color-mix(in srgb,var(--down) 18%,transparent)}
.is-intro .spark{animation:cev-wipe 1.2s var(--ease-out) both}

/* Loading: an indeterminate cinnabar sweep above the status text. */
.loading{align-content:center;justify-items:center;gap:16px}
.loading:before{content:'';display:block;width:min(180px,50%);height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,var(--blue),transparent) no-repeat,var(--line);background-size:40% 100%,100% 100%;animation:cev-sweep 1.15s var(--ease) infinite}
.lp .loading:before{display:none}

/* Page entrance: static sections rise in once, slightly staggered (live re-renders inside them never replay it). */
main>*{animation:cev-rise .55s var(--ease-out) both}
main>:nth-child(2){animation-delay:.04s}main>:nth-child(3){animation-delay:.08s}main>:nth-child(4){animation-delay:.12s}main>:nth-child(n+5){animation-delay:.16s}
.lp main>*{animation:none}

/* Dashboard section nav: sticky under a frosted strip, the section in view is marked. */
.anchor{position:sticky;top:0;z-index:6;margin:0 -36px 28px;padding:14px 36px;background:color-mix(in srgb,var(--bg) 86%,transparent);-webkit-backdrop-filter:saturate(1.3) blur(12px);backdrop-filter:saturate(1.3) blur(12px)}
.anchor a{position:relative;padding:4px 0;transition:color var(--dur) var(--ease)}
.anchor a:after{content:'';position:absolute;left:0;right:0;bottom:-15px;height:2px;border-radius:2px;background:var(--blue);transform:scaleX(0);transition:transform .3s var(--ease-out)}
.anchor a:hover{color:var(--ink)}.anchor a[aria-current=true]{color:var(--blue)}.anchor a[aria-current=true]:after{transform:scaleX(1)}
.section{scroll-margin-top:76px}

/* Theme toggle: icon + label; the switch itself is a circular reveal from the button (View Transitions). */
.theme-toggle,.lp-theme#theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px}
#theme-toggle svg{width:16px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;transition:transform .5s var(--ease-out)}
#theme-toggle[aria-pressed=true]{background:var(--surface);color:var(--ink);border-color:var(--line)}#theme-toggle[aria-pressed=true]:hover{background:var(--tint)}
.lp #theme-toggle[aria-pressed=true]{background:transparent;color:var(--muted)}.lp #theme-toggle[aria-pressed=true]:hover{color:var(--ink);border-color:var(--muted)}
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}

/* ===== Account control ===== */
.acct{position:relative;margin-top:auto;min-width:0}
.acct-signin{display:flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:14.5px;font-weight:500;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease)}
.acct-signin svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.acct-signin .acct-go{width:14px;height:14px;margin-left:auto;color:var(--muted);transition:transform .3s var(--ease-out),color var(--dur)}
.acct-signin:hover{border-color:var(--blue);color:var(--blue)}.acct-signin:hover .acct-go{color:var(--blue)}
.acct-trigger{display:flex;align-items:center;gap:10px;width:100%;min-height:50px;padding:8px 10px 8px 8px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);text-align:left;font-size:14.5px}
.acct-trigger:hover{background:var(--surface);border-color:color-mix(in srgb,var(--blue) 45%,var(--line))}
.acct-trigger:not(:disabled):active{transform:scale(.985)}
.acct.is-open .acct-trigger{border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 12%,transparent)}
.acct-seal{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:7px;background:var(--acct-seal);color:var(--acct-seal-ink);font:700 16px/1 'Noto Serif SC','Songti SC','SimSun',serif;box-shadow:inset 0 0 0 2px var(--acct-seal),inset 0 0 0 3px color-mix(in srgb,var(--acct-seal-ink) 45%,transparent);transition:transform .45s var(--ease-out)}
.acct-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}
.acct-chev{flex:none;width:16px;height:16px;fill:none;stroke:var(--muted);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .3s var(--ease-out)}
.acct.is-open .acct-chev{stroke:var(--blue)}
.acct-menu{position:absolute;left:0;bottom:calc(100% + 10px);z-index:40;width:max(100%,264px);padding:6px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-pop);transform-origin:24px 100%;opacity:0;visibility:hidden;transform:translateY(6px) scale(.97);transition:opacity .14s var(--ease),transform .2s var(--ease),visibility 0s .2s}
.acct.is-open .acct-menu{opacity:1;visibility:visible;transform:none;transition:opacity .18s var(--ease),transform .32s var(--ease-out),visibility 0s}
.acct-head{display:flex;align-items:center;gap:12px;padding:10px 10px 14px;margin-bottom:6px;border-bottom:1px solid var(--line)}
.acct-head .acct-seal{width:38px;height:38px;font-size:19px;border-radius:8px}
.acct-email{min-width:0;font-size:14.5px;line-height:1.45;color:var(--ink);overflow-wrap:anywhere}
.acct-item{display:flex;align-items:center;gap:11px;width:100%;min-height:42px;padding:9px 10px;border:0;border-radius:7px;background:none;color:var(--ink);font-size:15px;text-align:left;cursor:pointer}
.acct-item svg{width:17px;height:17px;flex:none;fill:none;stroke:var(--muted);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:stroke var(--dur),transform .3s var(--ease-out)}
.acct-item:hover,.acct-item:focus-visible{background:var(--tint);color:var(--blue);outline:none}
.acct-item:hover svg,.acct-item:focus-visible svg{stroke:currentColor;transform:translateX(1px)}
.acct-item:not(:disabled):active{transform:scale(.98)}
.acct-item.is-danger{color:var(--up)}.acct-item.is-danger svg{stroke:currentColor}
.acct-item.is-danger:hover,.acct-item.is-danger:focus-visible{background:color-mix(in srgb,var(--up) 10%,transparent);color:var(--up)}
.acct-item:disabled{opacity:.55;cursor:wait}
.acct-menu hr{border:0;border-top:1px solid var(--line);margin:6px 4px}
.acct-note{margin:6px 10px 4px;font-size:14px;color:var(--up)}.acct-note:empty{display:none}
.acct.is-open .acct-item{animation:cev-item .34s var(--ease-out) both}
.acct.is-open .acct-item:nth-of-type(2){animation-delay:.03s}.acct.is-open .acct-item:nth-of-type(3){animation-delay:.06s}
.account-link~.theme-toggle,.acct~.theme-toggle{margin-top:-16px}

/* Delete-account dialog. */
.acct-dialog{width:min(440px,calc(100vw - 32px));padding:28px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);box-shadow:0 40px 90px -24px rgba(30,16,6,.5)}
.acct-dialog[open]{animation:cev-pop .32s var(--ease-out)}
.acct-dialog::backdrop{background:rgba(29,26,22,.42);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);animation:cev-fade .2s var(--ease)}
.acct-dialog h2{margin:0 0 10px;font:700 22px/1.3 'Noto Serif SC','Songti SC','SimSun',serif}
.acct-dialog p{margin:0 0 20px;color:var(--muted);line-height:1.75}
.acct-dialog label{display:grid;gap:8px;font-size:14.5px;font-weight:500}
.acct-dialog input{width:100%;min-height:46px;padding:10px 12px;font-size:16px;border-radius:7px}
.acct-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
.acct-actions button{min-height:42px;padding:9px 18px;border-radius:7px}
.acct-actions .is-danger{background:var(--up);border-color:var(--up);color:#fff;font-weight:600}
.acct-actions .is-danger:not(:disabled):hover{background:color-mix(in srgb,var(--up) 86%,#000);border-color:color-mix(in srgb,var(--up) 86%,#000)}
.acct-actions button:disabled{opacity:.6;cursor:wait}
.acct-dialog .acct-error{margin:12px 0 0;color:var(--up);font-size:14px;line-height:1.6}.acct-dialog .acct-error:empty{display:none}

/* Account page (/login/ when signed in): seal + email, shortcut rows, danger zone. */
.research .account-card{max-width:640px;padding:0;overflow:hidden}
.account-head{display:flex;align-items:center;gap:16px;padding:26px 26px 24px;border-bottom:1px solid var(--line)}
.account-head .acct-seal{width:52px;height:52px;font-size:25px;border-radius:11px}
.account-head .auth-email{flex:1;min-width:0;margin:0;font-size:18px;overflow-wrap:anywhere}
.account-links{display:grid;padding:8px}
.account-links a{display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:9px;color:var(--ink);transition:background-color var(--dur) var(--ease)}
.account-links a>svg{width:22px;height:22px;flex:none;fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:stroke var(--dur)}
.account-links a>svg:last-child{width:17px;height:17px;margin-left:auto;transition:transform .3s var(--ease-out),stroke var(--dur)}
.account-links span{display:grid;gap:2px;min-width:0}.account-links b{font-weight:600;font-size:16px}.account-links small{font-size:14px;color:var(--muted)}
.account-links a:hover{background:var(--tint)}.account-links a:hover>svg{stroke:var(--blue)}.account-links a:hover b{color:var(--blue)}
.account-card #auth-message{margin:0 26px}.account-card #auth-message:empty{display:none}
.account-danger{margin:0;padding:18px 26px 22px;border-top:1px solid var(--line)}
.account-danger summary{color:var(--muted);font-size:14.5px;width:max-content}.account-danger summary:hover{color:var(--up)}
.account-danger[open] summary{color:var(--up);margin-bottom:6px}
.account-danger p{color:var(--muted);font-size:14.5px}
@media(hover:hover){.account-links a:hover>svg:last-child{transform:translateX(3px)}}
@media(max-width:700px){.account-head{padding:20px 18px;flex-wrap:wrap}.account-head .auth-email{font-size:16.5px}.account-head #logout{flex:1 1 100%}.account-links a{padding:14px 12px;gap:12px}.account-danger{padding:16px 18px 20px}}
@media(min-width:701px) and (max-height:720px){.sidebar{gap:16px;padding-top:20px;padding-bottom:20px}.site-nav{gap:4px}.site-nav a{padding:9px 14px}.acct~.theme-toggle{margin-top:-8px}}

/* Landing header: pill trigger, menu drops below. */
.acct--lp{margin:0}
.acct--lp .acct-signin{min-height:0;padding:8px 15px;border-radius:999px;background:transparent;color:var(--muted);font-size:15px;font-weight:400}
.acct--lp .acct-signin:hover{color:var(--ink);border-color:var(--muted)}
.acct--lp .acct-trigger{width:auto;min-height:40px;max-width:240px;padding:3px 12px 3px 3px;border-radius:999px;background:transparent;font-size:15px}
.acct--lp .acct-trigger .acct-seal{width:32px;height:32px;border-radius:50%}
.acct--lp .acct-menu,.acct--top .acct-menu{left:auto;right:0;bottom:auto;top:calc(100% + 10px);width:min(280px,calc(100vw - 32px));transform-origin:calc(100% - 20px) 0;transform:translateY(-6px) scale(.97)}

@media(hover:hover){
 .brand:hover img{transform:rotate(-5deg) scale(1.05)}.site-nav a:hover>svg:first-child{transform:translateX(2px)}
 .acct-trigger:hover .acct-seal{transform:rotate(-6deg)}#theme-toggle:hover svg{transform:rotate(-20deg)}.acct-signin:hover .acct-go{transform:translateX(3px)}
}
/* Narrow index cards: the change wraps under the price instead of being clipped. */
.index-card .quote{flex-wrap:wrap;row-gap:2px}
@media(max-width:1100px){.anchor{margin:0 -22px 26px;padding:12px 22px}.brand{font-size:16px}}
@media(max-width:700px){
 .acct{margin:0}.acct~.theme-toggle{margin-top:0}
 .sidebar{grid-template-areas:"brand acct theme" "nav nav nav";align-items:center;gap:14px 10px}.sidebar .brand{grid-area:brand}.sidebar .site-nav{grid-area:nav}.sidebar .acct{grid-area:acct}.sidebar .theme-toggle{grid-area:theme}
 .sidebar .acct-trigger{width:auto;min-height:40px;padding:2px;border-color:transparent;background:transparent;border-radius:10px;gap:0}.sidebar .acct-trigger .acct-seal{width:36px;height:36px;font-size:17px;border-radius:8px}
 .sidebar .acct-name,.sidebar .acct-chev{display:none}
 .sidebar .acct-menu{left:auto;right:0;bottom:auto;top:calc(100% + 10px);width:min(280px,calc(100vw - 32px));transform-origin:calc(100% - 18px) 0;transform:translateY(-6px) scale(.97)}
 .sidebar .acct-signin{min-height:40px;padding:7px 12px}.sidebar .acct-signin .acct-go{display:none}
 .sidebar .theme-toggle{width:40px;min-height:40px;padding:0}.sidebar .theme-toggle span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
 .anchor{margin:0 -16px 22px;padding:10px 16px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;gap:20px}.anchor::-webkit-scrollbar{display:none}.anchor a{white-space:nowrap}.anchor{-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 36px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 36px),transparent)}.anchor a:after{bottom:-11px}
 .section{scroll-margin-top:60px}
 .lp-tools-bar{position:relative}.acct--lp{position:static}
 .acct--lp .acct-name{display:none}.acct--lp .acct-trigger{padding:3px 8px 3px 3px;gap:6px}
}

@keyframes cev-rise{from{opacity:0;transform:translateY(10px)}}
@keyframes cev-fade{from{opacity:0}}
@keyframes cev-pop{from{opacity:0;transform:translateY(10px) scale(.97)}}
@keyframes cev-item{from{opacity:0;transform:translateY(4px)}}
@keyframes cev-mark{from{transform:scaleY(0)}}
@keyframes cev-settle{from{transform:scale(.94)}}
@keyframes cev-sweep{from{background-position:-60% 0,0 0}to{background-position:160% 0,0 0}}
@keyframes cev-wipe{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0 0 0 0)}}
@keyframes cev-tick{0%,35%{background:var(--tick)}100%{background:transparent}}

@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*:before,*:after{animation-duration:.01ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
 .loading:before{display:none}
}