/* ==========================================================================
   Anatomy of a Website — styles.css
   A friendly field guide for non-technical readers.
   Design: warm "museum guidebook" — soft paper, ink navy, signal orange.
   Name-tag layer: violet "exhibit label" callouts (visually separate meta layer).
   ========================================================================== */

/* ---------- tokens ---------- */
:root{
  --bg:#faf6ef;
  --panel:#ffffff;
  --ink:#23272f;
  --muted:#6b7280;
  --line:#eae3d5;
  --accent:#e8590c;
  --accent-ink:#ffffff;
  --teal:#0f766e;
  --annot:#6d28d9;
  --annot-bg:#f3eefe;
  --code-bg:#f1ece1;
  --shadow:0 10px 30px rgba(35,39,47,.08);
  --radius:14px;
  --font-display:Georgia,'Times New Roman',serif;
  --font-body:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --font-mono:ui-monospace,'SF Mono',Menlo,Consolas,'Liberation Mono',monospace;
}
[data-theme="dark"]{
  --bg:#12151c;
  --panel:#1a1f29;
  --ink:#ece9e1;
  --muted:#9aa3b2;
  --line:#2a3040;
  --accent:#ff7a33;
  --accent-ink:#14181f;
  --teal:#2dd4bf;
  --annot:#a78bfa;
  --annot-bg:#1e1930;
  --code-bg:#20242f;
  --shadow:0 10px 30px rgba(0,0,0,.45);
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scrollbar-color:var(--accent) var(--code-bg);scrollbar-width:thin}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-body);font-size:1rem;line-height:1.65;
  transition:background .3s ease,color .3s ease;
  padding-top:64px;
}
h1,h2,h3{font-family:var(--font-display);line-height:1.15;margin:0 0 .5em}
p{margin:0 0 1em}
a{color:var(--accent)}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer}
code,kbd{font-family:var(--font-mono);font-size:.85em;background:var(--code-bg);padding:.1em .4em;border-radius:6px}
.container{width:min(1120px,92vw);margin-inline:auto}
::selection{background:var(--accent);color:var(--accent-ink)}

/* custom scrollbar */
::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--code-bg)}
::-webkit-scrollbar-thumb{background:var(--accent);border-radius:8px;border:3px solid var(--code-bg)}
::-webkit-scrollbar-thumb:hover{background:var(--teal)}

/* scroll progress bar */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--accent),var(--teal));
  z-index:1000;pointer-events:none;
}

/* skip link */
.skip-link{
  position:fixed;top:-60px;left:1rem;z-index:1200;
  background:var(--ink);color:var(--bg);padding:.6rem 1rem;border-radius:8px;
  font-family:var(--font-mono);font-size:.8rem;text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:1rem}

/* ==========================================================================
   HEADER / NAVBAR
   ========================================================================== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  background:color-mix(in srgb,var(--bg) 92%,transparent);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:1rem;min-height:64px}
.brand{
  display:flex;align-items:center;gap:.5rem;text-decoration:none;
  font-family:var(--font-display);font-weight:700;font-size:1.1rem;color:var(--ink);
}
.brand svg{color:var(--accent)}
.brand em{font-style:normal;color:var(--muted);font-weight:400;font-size:.9em}
.main-nav{display:flex;gap:.25rem;margin-left:auto}
.main-nav a{
  text-decoration:none;color:var(--muted);font-size:.92rem;font-weight:600;
  padding:.45rem .8rem;border-radius:8px;transition:color .2s,background .2s;
}
.main-nav a:hover{color:var(--ink);background:var(--code-bg)}
.main-nav a.active{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.header-actions{display:flex;align-items:center;gap:.5rem}
.icon-btn{
  display:grid;place-items:center;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:var(--panel);color:var(--ink);
  transition:border-color .2s,transform .15s;
}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn:active{transform:scale(.93)}
.icon-btn svg{width:18px;height:18px}
.icon-btn .moon-icon{display:none}
[data-theme="dark"] .icon-btn .sun-icon{display:none}
[data-theme="dark"] .icon-btn .moon-icon{display:block}

.nametag-toggle{
  font-family:var(--font-mono);font-size:.78rem;font-weight:700;letter-spacing:.02em;
  border:1px dashed var(--annot);color:var(--annot);background:var(--annot-bg);
  padding:.5rem .85rem;border-radius:10px;transition:all .2s;
}
.nametag-toggle[aria-pressed="true"]{background:var(--annot);color:#fff;border-style:solid}
.nav-burger{display:none}

@media (max-width:768px){
  .nav-burger{display:grid}
  .main-nav{
    position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--panel);border-bottom:1px solid var(--line);padding:.75rem 4vw 1rem;
    transform:translateY(-130%);transition:transform .3s ease;box-shadow:var(--shadow);
  }
  .site-header.nav-open .main-nav{transform:translateY(0)}
  .main-nav a{padding:.7rem .8rem}
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position:relative;overflow:hidden;
  padding:6.5rem 0 5.5rem;
  background:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:44px 44px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(600px 340px at 78% 18%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 70%),
    radial-gradient(500px 320px at 8% 90%,color-mix(in srgb,var(--teal) 14%,transparent),transparent 70%);
}
.hero-inner{position:relative}
.eyebrow{
  font-family:var(--font-mono);font-size:.78rem;font-weight:700;color:var(--teal);
  text-transform:uppercase;letter-spacing:.14em;margin-bottom:1rem;
  display:flex;align-items:center;gap:.6rem;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--teal)}
.hero h1{font-size:clamp(2.3rem,6vw,4rem);max-width:20ch}
.hero h1 .hl{color:var(--accent)}
.hero .lede{font-size:1.15rem;color:var(--muted);max-width:56ch;margin-bottom:2rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:.75rem}

/* page-load stagger */
.stagger-item{opacity:0;transform:translateY(14px)}
body.loaded .stagger-item{animation:rise .55s cubic-bezier(.2,.7,.3,1) forwards}
body.loaded .stagger-item:nth-child(1){animation-delay:.05s}
body.loaded .stagger-item:nth-child(2){animation-delay:.15s}
body.loaded .stagger-item:nth-child(3){animation-delay:.25s}
body.loaded .stagger-item:nth-child(4){animation-delay:.35s}
body.loaded .stagger-item:nth-child(5){animation-delay:.45s}
@keyframes rise{to{opacity:1;transform:none}}

/* ==========================================================================
   SECTIONS
   ========================================================================== */
section{padding:4.5rem 0}
.section-head{margin-bottom:2.5rem;max-width:660px}
.section-kicker{
  font-family:var(--font-mono);font-size:.75rem;font-weight:700;color:var(--accent);
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:.6rem;
}
.section-head h2{font-size:clamp(1.7rem,3.5vw,2.4rem)}
.section-head p{color:var(--muted)}

.frame{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:1.75rem;
}
.frame + .frame, .frame + .grid, .grid + .frame, .grid + .grid, .meta-grid + .frame{margin-top:2rem}
.frame-title{
  font-family:var(--font-mono);font-size:.75rem;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.12em;margin-bottom:1.25rem;
  display:flex;align-items:center;gap:.5rem;
}
.frame-title::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.frame .hint{font-size:.9rem;color:var(--muted);margin:0 0 1rem}

/* ---------- buttons ---------- */
.btn{
  position:relative;overflow:hidden;display:inline-flex;align-items:center;gap:.5rem;
  font-weight:700;font-size:.95rem;text-decoration:none;
  padding:.7rem 1.4rem;border-radius:10px;border:1px solid transparent;
  transition:transform .15s,box-shadow .2s,background .2s,border-color .2s,opacity .2s;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 45%,transparent)}
.btn-primary:active{transform:translateY(0) scale(.97)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-secondary:active{transform:scale(.97)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none!important}
:focus-visible{outline:3px solid var(--teal);outline-offset:3px;border-radius:6px}
.ripple{
  position:absolute;border-radius:50%;pointer-events:none;
  background:color-mix(in srgb,var(--accent-ink) 45%,transparent);
  transform:scale(0);animation:ripple .55s ease-out forwards;
}
@keyframes ripple{to{transform:scale(1);opacity:0}}
.btn-row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}

/* ---------- breadcrumbs ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;font-size:.9rem}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent);text-decoration:underline}
.crumbs .sep{color:var(--line)}
.crumbs [aria-current]{color:var(--ink);font-weight:700}

/* ---------- cards grid ---------- */
.grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem;transition:transform .2s ease,box-shadow .2s ease,border-color .2s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:1rem;
  background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);
}
.card-icon svg{width:22px;height:22px}
.card h3{font-size:1.15rem;margin-bottom:.4rem}
.card p{font-size:.92rem;color:var(--muted);margin-bottom:.9rem}
.card .tag{font-family:var(--font-mono);font-size:.72rem;color:var(--teal);font-weight:700}

/* ---------- carousel ---------- */
.carousel{position:relative}
.car-track{
  display:flex;gap:1rem;overflow-x:auto;scroll-snap-type:x mandatory;
  border-radius:var(--radius);scrollbar-width:none;
}
.car-track::-webkit-scrollbar{display:none}
.car-track:focus-visible{outline:3px solid var(--teal);outline-offset:4px}
.car-slide{
  position:relative;margin:0;flex:0 0 100%;scroll-snap-align:center;
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--panel);
}
.car-slide img{width:100%;aspect-ratio:16/9;object-fit:cover}
.car-slide figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:.8rem 1.1rem;
  font-family:var(--font-mono);font-size:.78rem;color:#fff;
  background:linear-gradient(transparent,rgba(10,12,18,.75));
}
.car-btn{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line);
  background:var(--panel);color:var(--ink);display:grid;place-items:center;
  box-shadow:var(--shadow);transition:background .2s,color .2s;
}
.car-btn:hover{background:var(--accent);color:var(--accent-ink)}
.car-btn svg{width:18px;height:18px}
.car-btn.prev{left:.7rem}
.car-btn.next{right:.7rem}
.car-dots{display:flex;justify-content:center;gap:.5rem;margin-top:1rem}
.car-dots button{
  width:10px;height:10px;border-radius:50%;border:none;padding:0;
  background:var(--line);transition:background .2s,transform .2s;
}
.car-dots button[aria-current="true"]{background:var(--accent);transform:scale(1.3)}
.car-dots button:hover{background:var(--teal)}

/* ---------- icons ---------- */
.icon-set{display:flex;flex-wrap:wrap;gap:1rem}
.icon-cell{
  flex:1 1 120px;display:flex;flex-direction:column;align-items:center;gap:.6rem;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem .75rem;
  transition:transform .2s,border-color .2s;
}
.icon-cell:hover{transform:translateY(-3px);border-color:var(--accent)}
.icon-cell svg{width:26px;height:26px;color:var(--teal)}
.icon-cell span{font-family:var(--font-mono);font-size:.72rem;color:var(--muted)}

/* ---------- badges ---------- */
.badge-row{display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center}
.badge-demo{display:flex;flex-direction:column;align-items:center;gap:.6rem}
.badge-demo .lbl{font-family:var(--font-mono);font-size:.7rem;color:var(--muted)}
.icon-btn.bell{position:relative;width:48px;height:48px}
.icon-btn.bell svg{width:22px;height:22px}
.badge{
  position:absolute;top:-7px;right:-7px;min-width:20px;height:20px;padding:0 5px;
  border-radius:99px;background:var(--accent);color:var(--accent-ink);
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  display:grid;place-items:center;border:2px solid var(--panel);
}
.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  padding:.28rem .7rem;border-radius:99px;
  background:color-mix(in srgb,var(--teal) 14%,transparent);color:var(--teal);
  border:1px solid color-mix(in srgb,var(--teal) 40%,transparent);
}
.chip.orange{background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,transparent)}

/* ---------- avatar ---------- */
.avatar-row{display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}
.avatar{position:relative;width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  font-weight:700;font-size:1.05rem;color:#fff;background:linear-gradient(135deg,var(--teal),var(--accent))}
.avatar.small{width:40px;height:40px;font-size:.85rem}
.avatar .presence{
  position:absolute;bottom:1px;right:1px;width:14px;height:14px;border-radius:50%;
  background:#22c55e;border:2.5px solid var(--panel);
}
.avatar .lbl{font-family:var(--font-mono);font-size:.7rem;color:var(--muted)}

/* ---------- forms ---------- */
.form-grid{display:grid;gap:1.1rem;max-width:480px}
.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:.35rem}
.field input{
  width:100%;padding:.7rem .9rem;border-radius:10px;font:inherit;
  border:1px solid var(--line);background:var(--bg);color:var(--ink);
  transition:border-color .2s,box-shadow .2s;
}
.field input::placeholder{color:color-mix(in srgb,var(--muted) 65%,transparent);font-style:italic}
.field input:hover{border-color:var(--muted)}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.field input:user-invalid{border-color:#dc2626;box-shadow:0 0 0 3px color-mix(in srgb,#dc2626 18%,transparent)}
.field input:disabled{background:var(--code-bg);cursor:not-allowed}
.field-error{color:#dc2626;font-size:.85rem;margin:.3rem 0 0;display:flex;gap:.35rem;align-items:center}
.form-success{display:flex;gap:.5rem;align-items:center;color:var(--teal);font-weight:700;font-size:.95rem}
.form-success svg{width:18px;height:18px;flex:none}

/* ---------- tooltip ---------- */
.tip{
  position:relative;font-weight:700;color:var(--ink);text-decoration:none;
  border-bottom:2px dotted var(--accent);cursor:help;
}
.tip::after{
  content:attr(data-tip);
  position:absolute;bottom:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(4px);
  width:max-content;max-width:230px;
  background:var(--ink);color:var(--bg);font-family:var(--font-mono);font-size:.74rem;font-weight:400;
  padding:.55rem .8rem;border-radius:8px;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:opacity .18s,transform .18s;z-index:20;
}
.tip::before{
  content:"";position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);
  border:6px solid transparent;border-top-color:var(--ink);
  opacity:0;transition:opacity .18s;z-index:20;
}
.tip:hover::after,.tip:focus-visible::after{opacity:1;transform:translateX(-50%) translateY(0)}
.tip:hover::before,.tip:focus-visible::before{opacity:1}

/* ---------- dropdown menu ---------- */
.dropdown{position:relative;display:inline-block}
.dropdown-menu{
  position:absolute;top:calc(100% + 8px);left:0;min-width:200px;z-index:40;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:.4rem;list-style:none;margin:0;
  opacity:0;transform:translateY(-6px);pointer-events:none;
  transition:opacity .18s,transform .18s;
}
.dropdown.open .dropdown-menu{opacity:1;transform:none;pointer-events:auto}
.dropdown-menu li a{
  display:block;padding:.55rem .8rem;border-radius:8px;text-decoration:none;
  color:var(--ink);font-size:.92rem;
}
.dropdown-menu li a:hover{background:var(--code-bg);color:var(--accent)}
.dropdown-menu hr{border:none;border-top:1px solid var(--line);margin:.35rem 0}
.caret{display:inline-block;transition:transform .2s}
.dropdown.open .caret{transform:rotate(180deg)}

/* ---------- accordion ---------- */
.accordion{display:grid;gap:.6rem;max-width:640px}
.acc-item{border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}
.acc-btn{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:1rem;
  background:none;border:none;text-align:left;font:inherit;font-weight:700;color:var(--ink);
  padding:1rem 1.2rem;
}
.acc-btn:hover{color:var(--accent)}
.acc-btn .acc-icon{flex:none;width:22px;height:22px;display:grid;place-items:center;color:var(--accent);transition:transform .25s}
.acc-btn[aria-expanded="true"] .acc-icon{transform:rotate(45deg)}
.acc-panel{padding:0 1.2rem;color:var(--muted);font-size:.93rem}
.acc-panel[hidden]{display:none}

/* ---------- tabs ---------- */
.tabs{max-width:640px}
.tab-list{display:flex;gap:.25rem;border-bottom:2px solid var(--line);flex-wrap:wrap}
.tab-list [role="tab"]{
  background:none;border:none;font:inherit;font-weight:700;color:var(--muted);
  padding:.6rem 1rem;border-bottom:3px solid transparent;margin-bottom:-2px;
  transition:color .2s,border-color .2s;
}
.tab-list [role="tab"]:hover{color:var(--ink)}
.tab-list [role="tab"][aria-selected="true"]{color:var(--accent);border-bottom-color:var(--accent)}
.tab-panel{padding:1.2rem .2rem;color:var(--muted);font-size:.95rem}

/* ---------- pagination ---------- */
.pagination{display:flex;gap:.35rem;align-items:center;flex-wrap:wrap}
.pagination button{
  min-width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);color:var(--ink);font-weight:700;font-size:.9rem;
  transition:background .2s,color .2s,border-color .2s;
}
.pagination button:hover{border-color:var(--accent);color:var(--accent)}
.pagination button[aria-current="page"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.pagination .dots{border:none;background:none;color:var(--muted)}

/* ---------- modal ---------- */
.modal-overlay{
  position:fixed;inset:0;z-index:1100;display:grid;place-items:center;padding:1rem;
  background:rgba(10,12,18,.6);backdrop-filter:blur(4px);
  animation:fadeIn .2s ease;
}
.modal{
  position:relative;
  width:min(460px,100%);background:var(--panel);color:var(--ink);
  border:1px solid var(--line);border-radius:18px;padding:1.75rem;box-shadow:var(--shadow);
  animation:popIn .25s cubic-bezier(.2,.9,.3,1.2);
}
.modal h3{font-size:1.35rem;padding-right:2rem}
.modal .close-x{position:absolute;top:.9rem;right:.9rem}
.modal code{word-break:break-all}
body.modal-open{overflow:hidden}
@keyframes fadeIn{from{opacity:0}}
@keyframes popIn{from{opacity:0;transform:scale(.92) translateY(10px)}}

/* ---------- toast ---------- */
.toast{
  position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(20px);
  z-index:1050;display:flex;align-items:center;gap:.6rem;
  background:var(--ink);color:var(--bg);font-size:.92rem;font-weight:600;
  padding:.8rem 1.2rem;border-radius:12px;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;
  max-width:min(90vw,420px);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast svg{width:18px;height:18px;color:#4ade80;flex:none}

/* ---------- motion demos ---------- */
.demo-row{display:flex;flex-wrap:wrap;gap:1.25rem}
.demo-cell{
  flex:1 1 160px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.4rem;display:flex;flex-direction:column;align-items:center;gap:1rem;text-align:center;
}
.demo-cell .lbl{font-family:var(--font-mono);font-size:.72rem;color:var(--muted)}
.spinner{
  width:34px;height:34px;border-radius:50%;
  border:4px solid var(--line);border-top-color:var(--accent);
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.hover-tile{
  width:64px;height:64px;border-radius:14px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--teal) 15%,transparent);color:var(--teal);
  transition:transform .25s cubic-bezier(.2,.9,.3,1.4),box-shadow .25s;
}
.demo-cell:hover .hover-tile{transform:rotate(8deg) scale(1.15);box-shadow:var(--shadow)}
.pulse-dot{width:16px;height:16px;border-radius:50%;background:var(--accent);animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{50%{transform:scale(1.6);opacity:.5}}
.stagger-demo{display:flex;gap:6px}
.stagger-demo i{width:10px;height:34px;border-radius:5px;background:var(--annot);animation:bob 1.2s ease-in-out infinite}
.stagger-demo i:nth-child(2){animation-delay:.1s}
.stagger-demo i:nth-child(3){animation-delay:.2s}
.stagger-demo i:nth-child(4){animation-delay:.3s}
.stagger-demo i:nth-child(5){animation-delay:.4s}
@keyframes bob{50%{transform:translateY(-10px);opacity:.55}}

/* ---------- loading skeleton ---------- */
.skeleton-set{display:grid;gap:.8rem;max-width:480px}
.skel{border-radius:10px;
  background:linear-gradient(90deg,#e2e2e2 25%,#f5f5f5 50%,#e2e2e2 75%);
  background-size:200% 100%;animation:shimmer 1.4s infinite}
[data-theme="dark"] .skel{background:linear-gradient(90deg,#2c3342 25%,#3d4554 50%,#2c3342 75%);background-size:200% 100%}
.skel.line{height:16px}
.skel.line.w60{width:60%}
.skel.block{height:90px}
@keyframes shimmer{to{background-position:-200% 0}}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- meta / favicon ---------- */
.meta-grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.favicon-show{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}
.favicon-show figure{margin:0;text-align:center}
.favicon-show img{border:1px dashed var(--line);border-radius:6px;padding:6px;background:var(--bg)}
.favicon-show figcaption{font-family:var(--font-mono);font-size:.68rem;color:var(--muted);margin-top:.4rem}
.mini-progress{height:8px;border-radius:99px;background:var(--code-bg);overflow:hidden}
.mini-progress i{display:block;height:100%;width:72%;background:linear-gradient(90deg,var(--accent),var(--teal));border-radius:99px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--bg);margin-top:3rem}
[data-theme="dark"] .site-footer{background:#0a0d13}
.footer-inner{display:grid;gap:2rem;grid-template-columns:2fr 1fr 1fr;padding:3.5rem 0 2rem}
.site-footer h4{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;margin:0 0 .9rem;color:color-mix(in srgb,var(--bg) 60%,transparent)}
.site-footer a{color:color-mix(in srgb,var(--bg) 80%,transparent);text-decoration:none;display:block;padding:.22rem 0;font-size:.92rem}
.site-footer a:hover{color:var(--accent)}
.footer-brand{display:flex;align-items:center;gap:.5rem;font-family:var(--font-display);font-weight:700;margin-bottom:.8rem;color:var(--bg)}
.footer-social{display:flex;gap:.6rem;margin-top:1rem}
.footer-social a{display:grid;place-items:center;width:36px;height:36px;border:1px solid color-mix(in srgb,var(--bg) 25%,transparent);border-radius:10px;padding:0}
.footer-social svg{width:16px;height:16px}
.footer-bottom{
  border-top:1px solid color-mix(in srgb,var(--bg) 15%,transparent);
  padding:1.1rem 0 1.4rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:.74rem;color:color-mix(in srgb,var(--bg) 55%,transparent);
}
@media (max-width:700px){.footer-inner{grid-template-columns:1fr}}

/* ==========================================================================
   NAME-TAG LAYER (the annotation system)
   ========================================================================== */
.has-annot{position:relative}
.annot-chip{
  position:absolute;top:-0.55rem;left:0;transform:translateY(-100%);
  display:none;align-items:center;gap:.4rem;white-space:nowrap;
  font-family:var(--font-mono);font-size:.66rem;font-weight:700;letter-spacing:.06em;
  color:var(--annot);background:var(--annot-bg);
  border:1px solid var(--annot);border-radius:6px;padding:.18rem .5rem;
  z-index:30;pointer-events:none;
}
.annot-chip::before{content:"";width:6px;height:6px;background:var(--annot);border-radius:50%}
body.annot-on .annot-chip{display:inline-flex}
body.annot-on .has-annot{outline:2px dashed color-mix(in srgb,var(--annot) 65%,transparent);outline-offset:4px}
body.annot-on .has-annot:hover{outline-style:solid;outline-width:2px}

/* name-tag detail card */
.annot-card{
  position:fixed;z-index:1150;width:min(330px,calc(100vw - 2rem));
  background:var(--annot-bg);border:1.5px solid var(--annot);border-radius:12px;
  box-shadow:0 16px 40px rgba(20,10,50,.28);padding:1rem 1.1rem;
  font-size:.88rem;
}
.annot-card header{
  display:flex;align-items:baseline;justify-content:space-between;gap:.6rem;
  font-family:var(--font-mono);margin-bottom:.55rem;
}
.annot-card .ac-name{font-weight:700;font-size:.82rem;color:var(--annot);letter-spacing:.05em;text-transform:uppercase}
.annot-card .ac-kind{font-size:.64rem;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:.05rem .5rem;flex:none}
.annot-card .ac-def{margin:0 0 .55rem}
.annot-card .ac-tech{
  margin:0;font-size:.8rem;color:var(--ink);
  border-left:3px solid var(--annot);padding-left:.6rem;
}
.annot-card .ac-a11y{
  margin:.55rem 0 0;font-size:.76rem;color:var(--teal);font-weight:600;
  display:flex;gap:.4rem;align-items:flex-start;
}
.annot-card .ac-a11y svg{width:14px;height:14px;flex:none;margin-top:.15rem}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important;
  }
  .stagger-item,.reveal{opacity:1!important;transform:none!important}
  .skel{background:var(--code-bg)!important}
  html{scroll-behavior:auto}
}