/* TFI v5 — futuristic minimal. Space Grotesk + Inter. Visible living background. */
:root{
  --canvas:#081C26; --paper:#EDF3F4;
  --dim:rgba(237,243,244,.62); --faint:rgba(237,243,244,.38);
  --line:rgba(237,243,244,.12); --brass:#D4A24C; --teal:#3E97A3;
  --disp:'Space Grotesk',system-ui,sans-serif; --sans:'Inter',system-ui,sans-serif;
  --pad:24px; --maxw:1060px;
}
@media (min-width:700px){ :root{ --pad:48px; } }
@media (min-width:1100px){ :root{ --pad:72px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0; background:var(--canvas); color:var(--paper);
  font-family:var(--sans); font-size:16.5px; line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
::selection{ background:var(--brass); color:var(--canvas); }
:focus-visible{ outline:2px solid var(--brass); outline-offset:3px; }
.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--pad); }

/* ---------- living background: grid + aurora + light sweep ---------- */
.bg{ position:fixed; inset:0; z-index:-1; overflow:hidden; background:var(--canvas); }
.bg::before{
  content:""; position:absolute; inset:0;
  background:
    linear-gradient(rgba(237,243,244,.03) 1px, transparent 1px) 0 0/100% 88px,
    linear-gradient(90deg, rgba(237,243,244,.03) 1px, transparent 1px) 0 0/88px 100%;
}
.aurora{
  position:absolute; inset:-25%;
  background:
    radial-gradient(42% 55% at 28% 32%, rgba(62,151,163,.26), transparent 62%),
    radial-gradient(38% 52% at 72% 64%, rgba(212,162,76,.14), transparent 62%);
  filter:blur(46px);
  animation:aur 14s ease-in-out infinite alternate;
}
@keyframes aur{
  from{ transform:translate(-3%,2%) scale(1); }
  to{ transform:translate(4%,-3%) scale(1.1); }
}
.sweep{
  position:absolute; inset:0;
  background:linear-gradient(105deg, transparent 42%, rgba(237,243,244,.055) 50%, transparent 58%);
  background-size:260% 100%;
  animation:sweep 8s linear infinite;
}
@keyframes sweep{ from{ background-position:130% 0; } to{ background-position:-130% 0; } }
@media (prefers-reduced-motion:reduce){ .aurora,.sweep{ animation:none; } }

/* ---------- wordmark ---------- */
.mark{ display:inline-block; text-decoration:none; }
.mark b{
  display:block; font-family:var(--disp); font-weight:600; font-size:1.18rem;
  line-height:1; letter-spacing:.44em; text-indent:.44em; color:var(--paper); text-transform:uppercase;
}
.mark span{
  display:block; margin-top:6px; font-family:var(--sans); font-size:.5rem; font-weight:500;
  letter-spacing:.28em; text-transform:uppercase; color:var(--faint);
}

/* ---------- header ---------- */
.head{
  position:sticky; top:0; z-index:60;
  background:rgba(8,28,38,.82); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.head-in{ display:flex; align-items:center; justify-content:space-between; gap:18px; padding-block:14px; }
.head-right{ display:flex; align-items:center; gap:22px; }
.nav-links{ display:none; align-items:center; gap:26px; }
.nav-links a{
  font-family:var(--disp); font-size:.82rem; font-weight:500; letter-spacing:.04em;
  text-decoration:none; color:var(--dim); transition:color .2s;
}
.nav-links a:hover, .nav-links a.on{ color:var(--paper); }
@media (min-width:880px){ .nav-links{ display:flex; } }
.head .btn{ padding:9px 16px; font-size:.8rem; }
.burger{
  display:inline-flex; background:none; border:1px solid var(--line); border-radius:3px;
  color:var(--paper); font-family:var(--disp); font-size:.74rem; letter-spacing:.08em;
  padding:9px 13px; cursor:pointer;
}
@media (min-width:880px){ .burger{ display:none; } }

/* fullscreen menu */
.menu{
  position:fixed; inset:0; z-index:80; background:rgba(8,28,38,.97); backdrop-filter:blur(10px);
  display:none; flex-direction:column; padding:24px var(--pad);
}
.menu.open{ display:flex; }
.menu-top{ display:flex; align-items:center; justify-content:space-between; }
.menu nav{ margin:auto 0; display:grid; gap:6px; }
.menu nav a{
  font-family:var(--disp); font-weight:600; font-size:clamp(1.7rem,7vw,2.4rem);
  letter-spacing:-.02em; text-decoration:none; color:var(--paper);
  padding-block:12px; border-bottom:1px solid var(--line);
}
.menu nav a span{ color:var(--brass); font-size:.8em; margin-right:14px; }
.menu .menu-mail{ font-size:.9rem; color:var(--faint); padding-bottom:14px; }
.menu .menu-mail a{ color:var(--dim); }

/* ---------- rail + bar ---------- */
.rail{ position:fixed; right:20px; top:50%; transform:translateY(-50%); z-index:55; display:none; flex-direction:column; gap:20px; }
@media (min-width:980px){ .rail{ display:flex; } }
.rail a{ display:flex; align-items:center; gap:10px; text-decoration:none; font-family:var(--disp); font-size:.64rem; letter-spacing:.22em; color:var(--faint); transition:color .3s; }
.rail a::before{ content:""; width:20px; height:1px; background:var(--faint); transition:all .3s; }
.rail a.on{ color:var(--brass); }
.rail a.on::before{ background:var(--brass); width:32px; }
.bar{ position:fixed; top:0; left:0; height:2px; background:var(--brass); width:0; z-index:70; }

/* ---------- chapters: tighter on mobile ---------- */
.ch{ padding-block:clamp(52px,9vh,130px); position:relative; }
.ch + .ch{ border-top:1px solid var(--line); }
.ch--first{ padding-top:clamp(40px,6vh,100px); }

.kicker{ display:flex; align-items:center; gap:14px; margin:0 0 26px; font-family:var(--disp); }
.kicker .n{ font-weight:500; font-size:.76rem; letter-spacing:.14em; color:var(--brass); }
.kicker .t{ font-size:.64rem; font-weight:500; letter-spacing:.3em; text-transform:uppercase; color:var(--dim); }
.kicker::after{ content:""; flex:1; height:1px; background:var(--line); }

h1,h2,h3{ font-family:var(--disp); font-weight:600; margin:0; text-wrap:balance; letter-spacing:-.025em; }
h1{ font-size:clamp(2.3rem,8.2vw,4.4rem); line-height:1.05; max-width:17ch; }
h1 em,h2 em{ font-style:normal; color:var(--brass); }
h2{ font-size:clamp(1.75rem,5.2vw,2.9rem); line-height:1.1; max-width:20ch; }

.sub{ margin:22px 0 0; font-size:clamp(1rem,1.35vw,1.16rem); line-height:1.66; color:var(--dim); max-width:47ch; }

.btn{
  display:inline-flex; align-items:center; gap:.6em;
  font-family:var(--disp); font-size:.9rem; font-weight:500; letter-spacing:.02em; text-decoration:none;
  padding:14px 26px; border:1px solid var(--brass); background:var(--brass); color:var(--canvas);
  border-radius:3px; transition:background .25s,color .25s,border-color .25s;
}
.btn:hover{ background:var(--paper); border-color:var(--paper); }
.btn--ghost{ background:transparent; color:var(--paper); border-color:var(--line); }
.btn--ghost:hover{ background:var(--paper); color:var(--canvas); border-color:var(--paper); }

.js .rv{ opacity:0; transform:translateY(10px); transition:opacity .5s ease, transform .5s ease; }
.js .rv.in{ opacity:1; transform:none; }

/* ---------- figures ---------- */
.figures{ display:grid; margin-top:46px; border-top:1px solid var(--line); }
.fig{ display:flex; align-items:baseline; gap:16px; padding-block:17px; border-bottom:1px solid var(--line); }
.fig b{ font-family:var(--disp); font-weight:600; font-size:clamp(1.9rem,5.4vw,2.7rem); line-height:1; min-width:2.6ch; letter-spacing:-.02em; }
.fig span{ font-size:.92rem; color:var(--dim); }
@media (min-width:760px){
  .figures{ grid-template-columns:repeat(3,1fr); border-bottom:1px solid var(--line); }
  .fig{ flex-direction:column; gap:12px; border-bottom:0; border-left:1px solid var(--line); padding:26px 0 26px 30px; }
  .fig:first-child{ border-left:0; padding-left:0; }
}

/* ---------- method rows (fixed markup: number | content) ---------- */
.method{ margin-top:38px; }
.mrow{
  display:grid; grid-template-columns:3.2ch 1fr; gap:22px;
  padding-block:26px; border-bottom:1px solid var(--line); align-items:start;
}
.mrow:first-child{ border-top:1px solid var(--line); }
.mrow .n{ font-family:var(--disp); font-weight:500; font-size:.78rem; letter-spacing:.12em; color:var(--brass); padding-top:.5em; }
.mrow h3{ margin:0 0 8px; font-size:clamp(1.2rem,2.5vw,1.55rem); }
.mrow p{ margin:0; color:var(--dim); font-size:.97rem; max-width:56ch; }
@media (min-width:820px){ .mrow{ grid-template-columns:6ch 1fr; gap:40px; padding-block:34px; } }

/* ---------- world ---------- */
.world-map{ margin-top:40px; }
.world-map svg{ width:100%; height:auto; }
.js g[data-region]{ opacity:.15; transition:opacity .9s ease; }
.js g[data-region].lit{ opacity:1; }
.regions{ list-style:none; margin:30px 0 0; padding:0; display:grid; }
.regions li{
  display:flex; align-items:center; gap:14px; padding-block:13px;
  border-bottom:1px solid var(--line); font-family:var(--disp); font-size:.96rem; font-weight:500;
  color:var(--faint); cursor:pointer; transition:color .5s;
}
.regions li:first-child{ border-top:1px solid var(--line); }
.regions li i{ width:11px; height:11px; border-radius:2px; flex:none; opacity:.25; transition:opacity .5s; }
.regions li.lit{ color:var(--paper); }
.regions li.lit i{ opacity:1; }
@media (min-width:640px){ .regions{ grid-template-columns:1fr 1fr; column-gap:48px; } }
@media (min-width:980px){ .regions{ grid-template-columns:repeat(3,1fr); } }

/* region detail rows (regions page) */
.rrow{ display:grid; gap:8px; padding-block:26px; border-bottom:1px solid var(--line); }
.rrow:first-child{ border-top:1px solid var(--line); }
.rrow .tag{ font-family:var(--disp); font-size:.66rem; font-weight:500; letter-spacing:.22em; text-transform:uppercase; color:var(--brass); }
.rrow h3{ font-size:clamp(1.2rem,2.5vw,1.5rem); }
.rrow p{ margin:0; color:var(--dim); font-size:.97rem; max-width:60ch; }
@media (min-width:820px){
  .rrow{ grid-template-columns:16ch 1fr; gap:40px; align-items:start; padding-block:34px; }
  .rrow .tag{ padding-top:.5em; }
  .rrow h3{ grid-column:2; }
  .rrow p{ grid-column:2; }
  .rrow .tag{ grid-row:1 / span 2; }
}

/* ---------- operator + book ---------- */
.op{ display:grid; gap:36px; margin-top:6px; }
.op-photo{ position:relative; aspect-ratio:4/5; max-width:320px; overflow:hidden; border-radius:4px; background:linear-gradient(165deg,#12303e,#081C26); border:1px solid var(--line); }
.op-photo img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.op-photo .ph{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; text-align:center; font-size:.64rem; letter-spacing:.22em; text-transform:uppercase; color:var(--faint); padding:20px; }
.op h2{ font-size:clamp(1.75rem,4.4vw,2.5rem); }
.op .role{ margin:8px 0 0; font-family:var(--disp); font-size:.64rem; font-weight:500; letter-spacing:.28em; text-transform:uppercase; color:var(--brass); }
.quote{ margin:22px 0 0; font-family:var(--disp); font-weight:500; font-size:clamp(1.1rem,2.5vw,1.45rem); line-height:1.42; letter-spacing:-.01em; max-width:34ch; }
.pedigree{ margin:22px 0 0; padding-top:20px; border-top:1px solid var(--line); color:var(--dim); font-size:.95rem; max-width:48ch; }
.pedigree b{ color:var(--paper); font-weight:600; }
@media (min-width:860px){ .op{ grid-template-columns:320px 1fr; gap:60px; align-items:center; } }

.book{ display:flex; gap:20px; align-items:center; margin-top:26px; padding-top:24px; border-top:1px solid var(--line); }
.book-cover{ position:relative; width:88px; aspect-ratio:2/3; flex:none; border-radius:3px; overflow:hidden; background:linear-gradient(165deg,#143240,#081C26); border:1px solid var(--line); }
.book-cover img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.book-cover .ph{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; text-align:center; font-size:.48rem; letter-spacing:.16em; text-transform:uppercase; color:var(--faint); padding:8px; }
.book p{ margin:0; font-size:.94rem; color:var(--dim); max-width:38ch; }
.book b{ color:var(--paper); }
.book a{ color:var(--brass); text-decoration:none; border-bottom:1px solid rgba(212,162,76,.4); }

/* ---------- begin + footer ---------- */
.begin .btn{ margin-top:30px; }
.begin .alt{ margin:22px 0 0; font-size:.9rem; color:var(--faint); }
.begin .alt a{ color:var(--dim); }
.foot{ border-top:1px solid var(--line); padding-block:34px 26px; font-size:.84rem; color:var(--faint); }
.foot-in{ display:flex; flex-wrap:wrap; gap:18px 40px; align-items:center; justify-content:space-between; }
.foot nav{ display:flex; flex-wrap:wrap; gap:10px 22px; }
.foot nav a{ text-decoration:none; color:var(--dim); font-size:.84rem; }
.foot nav a:hover{ color:var(--paper); }

/* ---------- form ---------- */
.form{ display:grid; gap:18px; max-width:540px; margin-top:36px; }
.field{ display:grid; gap:8px; }
.field label{ font-family:var(--disp); font-size:.62rem; font-weight:500; letter-spacing:.24em; text-transform:uppercase; color:var(--dim); }
.field input,.field select,.field textarea{
  font-family:var(--sans); font-size:1rem; color:var(--paper);
  background:rgba(237,243,244,.05); border:1px solid var(--line); border-radius:3px;
  padding:13px; width:100%;
}
.field select option{ color:#081C26; }
.field textarea{ min-height:120px; resize:vertical; }
.field input:focus,.field select:focus,.field textarea:focus{ border-color:var(--brass); outline:none; }
.form .btn{ justify-self:start; }
.note{ font-size:.85rem; color:var(--faint); }
.note a{ color:var(--dim); }