/* ============================================================
   BRAUN HAUS - PRECISION PROFILE
   Motion layer, extracted verbatim from the working prototype.
   Source: lab-braun-precision-profile.html (see reference/)
   Live:   https://earlyspring.nyc/lab/braun-precision-profile
   Demo:   open motion-reference.html
   ============================================================ */

/* ---- 1. Tokens ----
   --ease is the single easing curve used by every transition and
   keyframe in the build. Interaction .2-.3s, entrances .34-.6s,
   ambient loops 3-11s and infinite. Nothing else. */
  :root{
    /* --wordmark: base64 PNG omitted, not motion-related */
    --bg:#0A0A0A;
    --ink:#F5F3EE;
    --ink-dim:rgba(245,243,238,.55);
    --ink-faint:rgba(245,243,238,.30);
    --orange:#EA5B0C;
    --line:#2A2A2A;
    --line-2:#1C1C1C;
    --panel:#111110;
    --tile:#151513;
    --ease:cubic-bezier(.4,0,.2,1);
    --gut:clamp(20px,4vw,64px);
    --sans:"BraunLinear","Helvetica Neue",Helvetica,Arial,sans-serif;
  }

/* ---- 2. Keyframes ----
   Nine loops and entrances. Inventory in README.md. */
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes pulse{0%,100%{opacity:.5}50%{opacity:.95}}
@keyframes idlepulse{0%,100%{opacity:.45}50%{opacity:1}}
@keyframes idleg{0%,100%{opacity:.2}9%{opacity:1}22%{opacity:.2}}
@keyframes idletube{0%,100%{background:#241a10;box-shadow:none}50%{background:#fff4e2;box-shadow:0 0 16px 4px rgba(255,224,178,.5)}}
@keyframes idledawn{0%,100%{opacity:.82}50%{opacity:1}}
@keyframes idlering{0%{transform:scale(.35);opacity:.75}100%{transform:scale(3.4);opacity:0}}
@keyframes idledrift{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ---- 3. Entry + scroll reveal ----
   Driven by motion.js: IntersectionObserver adds .in. */
.fadein{animation:fade .34s var(--ease) both}
.rise{animation:rise .4s var(--ease) both}
.jstep{position:relative;display:grid;grid-template-columns:48px minmax(0,1fr) minmax(0,1.05fr);gap:36px;align-items:center;padding:38px 0;opacity:0;transform:translateY(26px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.jnode{width:48px;height:48px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--orange);background:var(--bg);z-index:2;transition:border-color .5s var(--ease)}
.jvisual{border:1px solid var(--line-2);background:var(--panel);border-radius:8px;padding:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:230px;gap:14px;transition:transform .3s var(--ease),border-color .3s var(--ease)}
.jbody h3{transition:color .3s var(--ease)}
.jstep:hover .jnode{background:var(--orange);color:#0A0A0A;border-color:var(--orange)}
.jstep:hover .jvisual{border-color:rgba(234,91,12,.45);transform:translateY(-3px)}
.jstep:hover h3{color:#fff}
.jstep.in{opacity:1;transform:none}

/* ---- 4. Interaction states ----
   Base rule carries the transition; the :hover/:focus rule below it
   is the state being transitioned TO. Both are needed. */
.demonav a{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);transition:color .2s var(--ease)}
.btn{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);padding:14px 22px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;transition:border-color .25s var(--ease),background .25s var(--ease),color .25s var(--ease)}
.braceProg{transition:stroke-dashoffset .6s linear;stroke-linecap:round}
.choice{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;text-align:left;padding:26px 4px;border-bottom:1px solid var(--line);font-size:clamp(20px,2.4vw,32px);font-weight:500;letter-spacing:-.01em;color:var(--ink);transition:padding-left .3s var(--ease),color .25s var(--ease)}
.choice .dot{width:9px;height:9px;border-radius:50%;background:var(--orange);opacity:0;transform:scale(.4);transition:opacity .25s var(--ease),transform .25s var(--ease)}
.obj{background:var(--tile);padding:18px 16px 16px;display:flex;flex-direction:column;gap:14px;text-align:left;min-height:190px;transition:background .25s var(--ease)}
.obj .thumb{flex:1;display:flex;align-items:center;justify-content:center;color:rgba(245,243,238,.42);transition:color .25s var(--ease)}
.obj .oline{height:1px;background:var(--orange);width:0;transition:width .3s var(--ease);margin-top:2px}
.mrow{display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding:22px 4px;border-bottom:1px solid var(--line);transition:padding-left .3s var(--ease)}
.field input{background:transparent;border:none;border-bottom:1px solid var(--line);color:var(--ink);font-size:19px;padding:8px 0;transition:border-color .25s var(--ease)}
.slot{padding:9px 4px;border:1px solid var(--line);background:none;text-align:center;font-size:13px;font-weight:600;color:var(--ink);cursor:pointer;transition:border-color .2s var(--ease),background .2s var(--ease);border-radius:3px;line-height:1.15;font-family:var(--sans)}
.glrow{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 4px;border-bottom:1px solid var(--line);width:100%;text-align:left;transition:padding-left .25s var(--ease)}
.brcard{cursor:pointer;transition:transform .25s var(--ease)}
.brimg{transition:border-color .25s var(--ease)}
.brcue{position:absolute;right:12px;bottom:10px;color:var(--ink);background:rgba(10,10,10,.55);padding:4px 9px;border-radius:3px;opacity:0;transition:opacity .25s var(--ease);font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}
.demonav a:hover{color:var(--ink)}
.btn:hover{border-color:var(--ink)}
.choice:hover{padding-left:20px}
.choice:hover .dot,.choice.sel .dot{opacity:1;transform:none}
.obj:hover{background:#1b1b18}
.obj:hover .thumb,.obj.sel .thumb{color:var(--ink)}
.mrow:hover{padding-left:16px}
.field input:focus{outline:none;border-color:var(--orange)}
.slot:hover:not(.full):not(.sel){border-color:var(--ink)}
.glrow:hover{padding-left:12px}
.brcard:hover{transform:translateY(-4px)}
.brcard:hover .brimg{border-color:rgba(234,91,12,.5)}
.brcard:hover .brcue{opacity:1}
.choice.sel{color:#fff}
.obj.sel{background:#1b1b18}
.slot.sel{border-color:var(--orange);background:rgba(234,91,12,.14)}
.pill.on{border-color:var(--orange);color:var(--orange)}
.jchoice.sel{color:#fff}

/* ---- 5. Ambient / attract loop ----
   Idle-screen motion for the in-room iPads. Pure CSS, always running.
   Stagger comes from inline animation-delay set at render time. */
.braceBase{animation:pulse 3.4s var(--ease) infinite}
.tube{flex:1;max-width:5px;margin:0 auto;border-radius:3px;background:#171717;box-shadow:0 0 0 rgba(255,236,200,0);transition:background .5s var(--ease),box-shadow .5s var(--ease)}
.jtube{flex:1;max-width:5px;margin:0 auto;border-radius:3px;background:#171717;transition:background .4s var(--ease),box-shadow .4s var(--ease)}
.idle-tab{padding:12px 16px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--ink-dim);border-bottom:2px solid transparent;cursor:pointer;transition:color .2s var(--ease),border-color .2s var(--ease);background:none}
.idle-nfc .r0{animation:idlepulse 3.2s var(--ease) infinite}
.idle-g{opacity:.22;animation:idleg 6.4s linear infinite}
.idle-amb--tubes i{flex:1;max-width:5px;margin:0 auto;border-radius:3px;background:#241a10;animation:idletube 3s ease-in-out infinite}
.idle-amb--dawn{background:radial-gradient(130% 95% at 50% 118%,#f7c98a 0%,#e8823c 20%,#7a3410 42%,#1a0f08 66%,#0a0a0a 100%);animation:idledawn 7s ease-in-out infinite}
.idle-amb--rings i{position:absolute;border:1px solid rgba(234,91,12,.4);border-radius:50%;width:70px;height:70px;animation:idlering 4.2s ease-out infinite}
.idle-amb--objects .o{position:absolute;opacity:.14;color:#fff;animation:idledrift 11s ease-in-out infinite}
.stn-tubes i{flex:1;max-width:6px;margin:0 auto;border-radius:3px;background:#241a10;animation:idletube 3s ease-in-out infinite}
.stn-dawn{background:radial-gradient(130% 95% at 50% 122%,#f7c98a 0%,#e8823c 20%,#7a3410 42%,#1a0f08 66%,#0a0a0a 100%);animation:idledawn 7s ease-in-out infinite}
.stn-objects .o{position:absolute;opacity:.12;color:#fff;animation:idledrift 11s ease-in-out infinite}
.idle-tab:hover{color:var(--ink)}
.tube.on{background:#fff4e2;box-shadow:0 0 26px 5px rgba(255,224,178,.75)}
.jtube.on{background:#fff4e2;box-shadow:0 0 20px 4px rgba(255,224,178,.7)}
.idle-tab.on{color:var(--ink);border-color:var(--orange)}

/* ---- 6. Overlays ----
   Modal, toast, readline. Enter/exit driven by motion.js. */
.readline.show{opacity:1;transition:opacity .4s var(--ease)}
.toast{position:fixed;left:50%;bottom:120px;transform:translateX(-50%) translateY(10px);background:var(--ink);color:#0A0A0A;font-size:12px;font-weight:700;letter-spacing:.06em;padding:12px 20px;opacity:0;pointer-events:none;transition:opacity .3s var(--ease),transform .3s var(--ease);z-index:80}
.blx{position:fixed;inset:0;z-index:100;background:rgba(8,8,8,.96);display:flex;align-items:center;justify-content:center;padding:5vh 5vw;opacity:0;transition:opacity .25s var(--ease)}
.toast.show{opacity:1;transform:translateX(-50%)}
.blx.show{opacity:1}

/* ---- 7. Agenda view ----
   Light-themed timeline screen. Same easing token, same scale. */
.ag-menu{position:absolute;top:8vh;right:var(--gut);font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:#0A0A0A;border:1px solid rgba(10,10,10,.2);padding:12px 20px;text-decoration:none;transition:border-color .2s var(--ease)}
.ag-item{break-inside:avoid;padding:12px 16px;margin-bottom:10px;border-left:2px solid transparent;border-radius:4px;transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.ag-subs li:before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;background:#c4c4c4;border-radius:50%;transition:background .2s var(--ease)}
.ag-syncdot.syncing{background:var(--orange);animation:idlepulse 1s ease-in-out infinite}
.ag-refresh{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;border:1px solid rgba(10,10,10,.2);padding:8px 15px;cursor:pointer;background:none;color:#0A0A0A;font-family:var(--sans);transition:border-color .2s var(--ease)}
.ag-checkname{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#0A0A0A;cursor:pointer;border-bottom:1px solid transparent;transition:border-color .2s var(--ease),color .2s var(--ease)}
.ag-allbtn{font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;border:1px solid rgba(10,10,10,.2);padding:8px 14px;cursor:pointer;background:none;color:#0A0A0A;font-family:var(--sans);transition:border-color .2s var(--ease)}
.ag-menu:hover{border-color:#0A0A0A}
.ag-item:hover{background:#F4F2ED;border-left-color:var(--orange);transform:translateX(3px)}
.ag-item:hover .ag-subs li:before{background:var(--orange)}
.ag-refresh:hover{border-color:#0A0A0A}
.ag-checkname:hover{border-bottom-color:currentColor}
.ag-allbtn:hover{border-color:#0A0A0A}

/* ---- 8. Reduced motion ----
   NOT present in the prototype; written here as the recommended
   production default. Ship this. The ambient loops in section 5 run
   continuously and are the ones that matter most for vestibular
   sensitivity, so they are stopped rather than shortened.
   Note: the attract screens may deserve a designed static frame
   rather than a frozen one - worth a design call, not a default. */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  /* land reveal-on-scroll elements in their final state */
  .jstep{opacity:1;transform:none}
  /* hold ambient loops on a legible frame instead of a blank one */
  .idle-amb--tubes i,.stn-tubes i{background:#fff4e2;box-shadow:0 0 16px 4px rgba(255,224,178,.5)}
  .idle-g{opacity:1}
  .idle-amb--rings i{opacity:.4;transform:scale(1.6)}
}