/* ═══════════════════════════════════════════════════════════════
   TIDD FAMILY HISTORY — shared design system
   Historic-illuminated meets modern. Large, legible, 70+ friendly.
   ═══════════════════════════════════════════════════════════════ */

:root{
  /* palette */
  --ink:#0a0e17;            /* deep midnight parchment-night */
  --ink-2:#0e1421;
  --panel:#121a2b;
  --panel-2:#16203353;
  --line:rgba(212,168,70,.16);
  --line-soft:rgba(255,255,255,.06);
  --gold:#d4a846;           /* illuminated-manuscript gold */
  --gold-bright:#f0cf85;
  --gold-deep:#a9812f;
  --indigo:#6366f1;
  --violet:#8b5cf6;
  --sky:#c7d2fe;
  --emerald:#34d399;
  --rose:#f26d7d;
  --paper:#f4ecd8;          /* aged paper for light cards */
  /* text */
  --fg:#ece7db;             /* warm off-white */
  --fg-soft:#b9b3a4;
  --fg-mute:#8a8574;
  /* type scale — LARGE by default (grandparent-legible) */
  --scale:1;                /* multiplied by the A-/A/A+ control */
  --fs-base:calc(20px * var(--scale));
  --fs-lead:calc(23px * var(--scale));
  --serif:'Cormorant Garamond','Lora',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1180px;
  --r:18px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{
  font-family:var(--sans);
  font-size:var(--fs-base);
  line-height:1.72;
  color:var(--fg);
  background:var(--ink);
  overflow-x:hidden;
  max-width:100vw;
  letter-spacing:.002em;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:rgba(212,168,70,.28);color:#fff}

/* ── backdrop layers ── */
#bg-canvas{position:fixed;inset:0;z-index:-3;pointer-events:none}
.bg-wash{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1200px 700px at 78% -8%,rgba(99,102,241,.16),transparent 60%),
    radial-gradient(1000px 620px at 12% 8%,rgba(139,92,246,.12),transparent 62%),
    radial-gradient(1300px 900px at 50% 120%,rgba(212,168,70,.10),transparent 60%);
}
.bg-grid{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.014) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.014) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 20%,#000 10%,transparent 72%);
  mask-image:radial-gradient(ellipse at 50% 20%,#000 10%,transparent 72%);
}
.bg-vignette{position:fixed;inset:0;z-index:-1;pointer-events:none;
  box-shadow:inset 0 0 240px 60px rgba(0,0,0,.55);}

/* ── nav ── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:200;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px clamp(16px,4vw,40px);
  background:rgba(10,14,23,.72);backdrop-filter:blur(18px) saturate(1.2);
  -webkit-backdrop-filter:blur(18px) saturate(1.2);
  border-bottom:1px solid var(--line);
}
/* Nav is fixed-size chrome: the A-/A/A+ control enlarges reading content,
   not the navigation, so the bar never wraps or overflows when scaled up. */
.brand{display:flex;align-items:center;gap:12px;flex:none;font-family:var(--serif);
  font-weight:600;font-size:21px;letter-spacing:.01em;color:var(--fg);white-space:nowrap}
.brand>span{white-space:nowrap}
.brand .crest{width:30px;height:30px;flex:none;filter:drop-shadow(0 2px 6px rgba(212,168,70,.4))}
.brand small{font-family:var(--mono);font-size:10px;color:var(--gold);
  letter-spacing:.22em;text-transform:uppercase;display:block;line-height:1;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:4px;min-width:0}
.nav-links a{
  font-size:15px;font-weight:500;color:var(--fg-soft);
  padding:9px 12px;border-radius:11px;transition:.18s;white-space:nowrap;
}
.nav-links a:hover{color:var(--fg);background:rgba(255,255,255,.05)}
.nav-links a.active{color:var(--gold-bright);background:rgba(212,168,70,.1)}
/* text-size control */
.textsize{display:flex;align-items:center;gap:2px;margin-left:8px;padding-left:12px;
  border-left:1px solid var(--line-soft)}
.textsize button{
  font-family:var(--serif);color:var(--fg-soft);background:transparent;border:1px solid var(--line-soft);
  cursor:pointer;border-radius:9px;line-height:1;transition:.15s;
}
.textsize button:hover{color:var(--gold-bright);border-color:var(--gold)}
.textsize .ts-sm{font-size:15px;padding:6px 9px}
.textsize .ts-md{font-size:19px;padding:5px 10px}
.textsize .ts-lg{font-size:23px;padding:4px 10px}
.textsize button.on{color:var(--ink);background:var(--gold);border-color:var(--gold);font-weight:600}
.hamb{display:none;background:transparent;border:1px solid var(--line);border-radius:11px;
  padding:9px 11px;cursor:pointer}
.hamb span{display:block;width:22px;height:2px;background:var(--fg);margin:4px 0;border-radius:2px;transition:.2s}

/* ── direct-line filter (shows only your lineal bloodline) ── */
.nav-links{margin-left:auto;order:5}
.line-toggle{order:7;display:inline-flex;align-items:center;gap:7px;flex:none;
  font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.01em;line-height:1;
  color:var(--fg-soft);background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:100px;padding:8px 13px;cursor:pointer;transition:.18s;white-space:nowrap}
.line-toggle:hover{color:var(--fg);border-color:var(--gold)}
.line-toggle .lt-dot{width:9px;height:9px;border-radius:50%;border:1.6px solid var(--fg-mute);transition:.18s;flex:none}
.line-toggle.on{color:var(--ink);background:var(--gold);border-color:var(--gold)}
.line-toggle.on .lt-dot{background:var(--ink);border-color:var(--ink)}
.hamb{order:9}
html.line-only [data-collateral]{display:none !important}
[data-lineal]{display:none !important}
html.line-only [data-lineal]{display:block !important}

/* ── layout ── */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(18px,5vw,40px)}
section{position:relative;z-index:1}
.pad{padding:clamp(56px,9vw,120px) 0}
.pad-sm{padding:clamp(36px,6vw,72px) 0}

/* ── kicker / headings ── */
.kicker{font-family:var(--mono);font-size:calc(12px*var(--scale));letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);display:inline-flex;align-items:center;gap:12px;margin-bottom:20px}
.kicker::before{content:'';width:34px;height:1px;background:linear-gradient(90deg,transparent,var(--gold))}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.05;letter-spacing:.005em;color:#fff}
.display{font-size:clamp(42px,8vw,86px);font-weight:600;line-height:.98;letter-spacing:-.01em}
h2{font-size:clamp(30px,4.6vw,52px)}
h3{font-size:clamp(22px,2.7vw,30px)}
.gold-text{color:var(--gold-bright)}
.grad-text{background:linear-gradient(120deg,var(--gold-bright),var(--gold) 40%,var(--violet) 90%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.lead{font-size:var(--fs-lead);color:var(--fg-soft);line-height:1.68;max-width:44ch}
p{margin:0 0 1em}
p.big{font-size:var(--fs-lead)}
.muted{color:var(--fg-mute)}
strong{color:#fff;font-weight:600}
em{color:var(--gold-bright);font-style:italic}

/* ── cards ── */
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(22px,3vw,34px);position:relative;overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.2,1),border-color .3s,box-shadow .3s;
}
.card::before{content:'';position:absolute;inset:0;border-radius:var(--r);padding:1px;pointer-events:none;
  background:linear-gradient(140deg,rgba(212,168,70,.5),transparent 40%,rgba(139,92,246,.35));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-4px);border-color:rgba(212,168,70,.32);
  box-shadow:0 24px 60px rgba(0,0,0,.5)}
.card:hover::before{opacity:1}

.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

/* stat */
.stat .num{font-family:var(--serif);font-size:clamp(38px,6vw,64px);font-weight:600;
  line-height:1;color:var(--gold-bright)}
.stat .lbl{font-size:calc(16px*var(--scale));color:var(--fg-soft);margin-top:10px}

/* pill / chip */
.chip{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:calc(12px*var(--scale));letter-spacing:.06em;text-transform:uppercase;
  color:var(--gold);background:rgba(212,168,70,.08);border:1px solid var(--line);
  padding:6px 13px;border-radius:100px}

/* quote / excerpt */
.excerpt{font-family:var(--serif);font-style:italic;font-size:calc(21px*var(--scale));
  line-height:1.6;color:#f3ecd9;border-left:3px solid var(--gold);
  padding:6px 0 6px 22px;margin:18px 0}
.excerpt cite{display:block;font-style:normal;font-family:var(--mono);font-size:calc(12px*var(--scale));
  letter-spacing:.08em;color:var(--fg-mute);margin-top:12px;text-transform:uppercase}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;
  font-size:calc(16px*var(--scale));padding:13px 24px;border-radius:13px;cursor:pointer;
  border:1px solid var(--line);color:var(--fg);background:rgba(255,255,255,.04);transition:.2s}
.btn:hover{border-color:var(--gold);color:var(--gold-bright);transform:translateY(-2px)}
.btn.gold{background:linear-gradient(120deg,var(--gold),var(--gold-deep));color:#1a1205;border:none}
.btn.gold:hover{color:#1a1205;box-shadow:0 12px 30px rgba(212,168,70,.35)}

/* footer */
.foot{border-top:1px solid var(--line);padding:44px 0 60px;margin-top:40px;color:var(--fg-mute);
  font-size:calc(15px*var(--scale))}
.foot a{color:var(--gold);border-bottom:1px solid transparent;transition:.2s}
.foot a:hover{border-color:var(--gold)}
.foot-nav{display:flex;flex-wrap:wrap;gap:8px 20px;margin-bottom:22px}
.foot-nav a{color:var(--fg-soft)}

/* reveal — hidden-initial state applies ONLY when JS confirms a sane viewport
   (html.reveal-on). With no JS, a broken/zero viewport, or reduced-motion,
   content is fully visible by default. Nothing can ever stay invisible. */
html.reveal-on [data-reveal]{opacity:0;transform:translateY(26px);
  transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
html.reveal-on [data-reveal].in{opacity:1;transform:none}

/* page-progress bar */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:300;
  background:linear-gradient(90deg,var(--gold),var(--violet));box-shadow:0 0 12px rgba(212,168,70,.6)}

/* skip / a11y */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ═══ FLIP-BOOK (reusable: books & multi-page letters) ═══ */
.flipbook{--fb-max:600px;margin:8px auto 0;max-width:calc(var(--fb-max) + 40px)}
.flipbook .fb-page{display:none}
.fb-stage{position:relative;perspective:2200px;background:
  radial-gradient(120% 120% at 50% 0%,rgba(30,24,12,.5),rgba(8,11,18,.7));
  border:1px solid var(--line);border-radius:16px;padding:clamp(14px,2.4vw,24px);overflow:hidden}
.fb-paper{position:relative;margin:0 auto;max-width:var(--fb-max);border-radius:4px;
  background:#f4ecd8;box-shadow:0 18px 44px rgba(0,0,0,.55),0 2px 0 rgba(0,0,0,.3);
  transform-style:preserve-3d;transition:transform .5s cubic-bezier(.3,.8,.4,1)}
/* cap the page height so the whole page + its overlay arrows stay in view */
.fb-paper img{display:block;max-width:100%;max-height:78vh;width:auto;margin:0 auto;border-radius:4px;background:#f4ecd8}
.fb-paper.turn-next{transform:rotateY(-13deg)}
.fb-paper.turn-prev{transform:rotateY(13deg)}

/* overlay controls sit ON the page, so you never scroll below to advance */
.fb-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:48px;height:48px;border:none;
  border-radius:50%;cursor:pointer;font-size:26px;line-height:1;color:#1a1205;background:rgba(240,207,133,.94);
  box-shadow:0 5px 16px rgba(0,0,0,.45);transition:.18s;display:flex;align-items:center;justify-content:center}
.fb-nav:hover:not(:disabled){background:var(--gold-bright);transform:translateY(-50%) scale(1.1)}
.fb-nav.prev{left:14px} .fb-nav.next{right:14px}
.fb-nav:disabled{opacity:.28;cursor:default}
.fb-counter{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);z-index:5;font-family:var(--mono);
  font-size:13px;color:#f4ecd8;background:rgba(10,14,23,.72);padding:6px 14px;border-radius:100px}
.fb-counter b{color:var(--gold-bright)}
.fb-toggle{position:absolute;top:16px;right:16px;z-index:5;font-family:var(--sans);font-weight:600;font-size:13px;
  cursor:pointer;padding:9px 13px;border-radius:11px;color:#1a1205;background:rgba(240,207,133,.94);border:none;
  box-shadow:0 4px 12px rgba(0,0,0,.35);transition:.18s}
.fb-toggle:hover{background:var(--gold-bright);transform:translateY(-1px)}
.fb-cap{text-align:center;color:var(--fg-mute);font-size:calc(14px*var(--scale));margin-top:14px}

/* in-frame typed transcription */
.fb-textview{display:none;max-height:min(76vh,760px);overflow-y:auto;padding:clamp(20px,3.4vw,40px);
  color:#241a0c;font-size:calc(17px*var(--scale));line-height:1.72}
.fb-paper.is-text img{display:none}
.fb-paper.is-text .fb-textview{display:block}
.fb-textview h4{font-family:var(--serif);color:#5a3d12;font-size:1.35em;margin:0 0 4px;line-height:1.15}
.fb-textview .rd-src{font-family:var(--mono);font-size:.7em;letter-spacing:.04em;color:#7a5a2e;text-transform:uppercase;margin-bottom:18px}
.fb-textview p{margin:0 0 .9em}
.fb-textview em{color:#5a3d12;font-style:italic}
.fb-textview strong{color:#1a1205}
.fb-textview .rd-note{color:#7a5a2e;font-size:.85em;border-top:1px solid rgba(0,0,0,.16);padding-top:12px;margin-top:6px}
.fb-enlarge{margin-top:10px;font-family:var(--sans);font-weight:600;font-size:calc(14px*var(--scale));cursor:pointer;
  padding:9px 15px;border-radius:9px;color:#f4ecd8;background:#3a2f18;border:none}
.fb-enlarge:hover{background:#5a3d12}

/* ═══ TRANSCRIPT READER (accessible, text-size slider) ═══ */
.reader{position:fixed;inset:0;z-index:500;display:none;flex-direction:column;
  background:rgba(9,12,18,.97);backdrop-filter:blur(6px)}
.reader.open{display:flex}
.reader-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:14px clamp(16px,4vw,40px);
  border-bottom:1px solid var(--line);background:rgba(10,14,23,.9)}
.reader-title{font-family:var(--serif);font-size:clamp(18px,2.4vw,24px);color:var(--gold-bright);flex:1;min-width:180px}
.reader-size{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;
  letter-spacing:.06em;text-transform:uppercase;color:var(--fg-soft)}
.reader-size input[type=range]{width:clamp(120px,20vw,220px);height:6px;-webkit-appearance:none;appearance:none;
  background:linear-gradient(90deg,var(--gold),var(--gold));border-radius:6px;outline:none}
.reader-size input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;
  background:var(--gold-bright);cursor:pointer;box-shadow:0 0 0 4px rgba(212,168,70,.25)}
.reader-size input[type=range]::-moz-range-thumb{width:22px;height:22px;border:none;border-radius:50%;background:var(--gold-bright);cursor:pointer}
.reader-size .a-sm{font-size:13px}.reader-size .a-lg{font-size:22px}
.reader-close{width:44px;height:44px;flex:none;border-radius:50%;cursor:pointer;font-size:18px;color:#fff;
  background:rgba(255,255,255,.08);border:1px solid var(--line);transition:.2s}
.reader-close:hover{background:var(--gold);color:#1a1205;border-color:var(--gold)}
.reader-scroll{flex:1;overflow-y:auto;padding:clamp(24px,5vw,56px) clamp(16px,5vw,40px)}
.reader-body{max-width:74ch;margin:0 auto;color:#ece7db;line-height:1.75;
  font-size:calc(19px * var(--rd, 1.15))}
.reader-body h4{font-family:var(--serif);color:var(--gold-bright);font-size:1.25em;margin:0 0 4px}
.reader-body .rd-src{font-family:var(--mono);font-size:.72em;letter-spacing:.05em;color:var(--fg-mute);
  text-transform:uppercase;margin-bottom:22px}
.reader-body p{margin:0 0 1em}
.reader-body .rd-note{color:var(--fg-mute);font-size:.8em;border-top:1px solid var(--line-soft);padding-top:14px;margin-top:8px}
@media(max-width:560px){ .reader-title{order:0;flex-basis:100%} }

/* ── responsive ── */
/* No hamburger: below 1420px the links become a second row, a thin
   horizontally-scrollable bar that is always visible under the brand. */
/* squeeze tier: full 8-link bar, compacted, on mid-size desktops */
@media(min-width:1421px) and (max-width:1640px){
  .nav-links a{font-size:13px;padding:8px 8px}
  .nav-links{gap:2px}
  .textsize{margin-left:4px;padding-left:6px}
  .line-toggle{font-size:12px;padding:7px 10px}
}
@media(max-width:1420px){
  .brand small{display:none}            /* compact one-line brand on small screens */
  .hamb{display:none}
  .nav{flex-wrap:wrap;padding-top:10px;padding-bottom:0;row-gap:0}
  .nav-links{order:20;flex-basis:100%;min-width:100%;display:flex;flex-direction:row;
    align-items:center;gap:2px;overflow-x:auto;scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
    margin:4px calc(-1*clamp(16px,4vw,40px)) 0;
    padding:2px clamp(16px,4vw,40px) 10px}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{flex:none;font-size:14.5px;padding:8px 11px}
  .textsize{flex:none;margin-left:6px;padding-left:10px;border-left:1px solid var(--line-soft)}
  .line-toggle{margin-left:auto;font-size:12px;padding:7px 11px}
}
@media(max-width:900px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
}
@media(max-width:720px){
  :root{--fs-base:calc(19px*var(--scale));--fs-lead:calc(21px*var(--scale))}
  .g2{grid-template-columns:1fr}
  .pad{padding:clamp(44px,10vw,70px) 0}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.12s!important}
  html{scroll-behavior:auto}
}