/* ==========================================================================
   TotalVitalityZone — stylesheet
   Design: "instrument panel" — cool bone ground, sodium-amber signal accent,
   instrument-teal data accent. Hypnogram trace as the recurring motif.
   No webfonts: system stacks only, for speed and zero render-blocking.
   ========================================================================== */

:root {
  /* --- light (default) --- */
  --ground:        #EDEFEC;
  --surface:       #FAFBF9;
  --surface-sunk:  #E3E7E2;
  --ink:           #111A19;
  --ink-soft:      #475855;
  --ink-faint:     #5C6D69;   /* darkened to clear WCAG AA 4.5:1 on --ground */
  --rule:          #D3DAD5;
  --rule-strong:   #B6C1BB;

  --signal:        #9E560D;   /* sodium amber */
  --signal-soft:   #F6E9D8;
  --data:          #10606D;   /* instrument teal */
  --data-soft:     #DDEDEF;
  --flag:          #9C3520;   /* caution */
  --flag-soft:     #F7E2DC;

  --shadow-sm: 0 1px 2px rgba(17,26,25,.06);
  --shadow-md: 0 1px 2px rgba(17,26,25,.05), 0 10px 28px -14px rgba(17,26,25,.22);

  --grotesk: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --serif:   Charter, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --mono:    ui-monospace, "Cascadia Mono", Consolas, "SF Mono", "Roboto Mono", Menlo, monospace;

  --measure: 68ch;
  --page: 1140px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground:        #0B1211;
    --surface:       #121B19;
    --surface-sunk:  #070D0C;
    --ink:           #E3EAE7;
    --ink-soft:      #A2B3AE;
    --ink-faint:     #71837E;
    --rule:          #1F2C29;
    --rule-strong:   #33443F;

    --signal:        #EFA54B;
    --signal-soft:   #2A1C07;
    --data:          #55C2D4;
    --data-soft:     #0B2A2F;
    --flag:          #E4795D;
    --flag-soft:     #2C150F;

    --shadow-sm: 0 1px 2px rgba(0,0,0,.5);
    --shadow-md: 0 1px 2px rgba(0,0,0,.45), 0 10px 28px -14px rgba(0,0,0,.8);
  }
}

:root[data-theme="dark"] {
  --ground:        #0B1211;
  --surface:       #121B19;
  --surface-sunk:  #070D0C;
  --ink:           #E3EAE7;
  --ink-soft:      #A2B3AE;
  --ink-faint:     #71837E;
  --rule:          #1F2C29;
  --rule-strong:   #33443F;

  --signal:        #EFA54B;
  --signal-soft:   #2A1C07;
  --data:          #55C2D4;
  --data-soft:     #0B2A2F;
  --flag:          #E4795D;
  --flag-soft:     #2C150F;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.5);
  --shadow-md: 0 1px 2px rgba(0,0,0,.45), 0 10px 28px -14px rgba(0,0,0,.8);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17.5px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { max-width: 100%; height: auto; display: block; }

a { color: var(--signal); text-decoration-thickness: 1px; text-underline-offset: 2.5px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible,
button:focus-visible,
summary:focus-visible { outline: 2px solid var(--data); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--ground);
  padding: 10px 16px; z-index: 100; font-family: var(--mono); font-size: 13px;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- layout ---------- */

.shell { max-width: var(--page); margin: 0 auto; padding: 0 24px; }
.prose { max-width: var(--measure); }
.prose > * { max-width: var(--measure); }

/* ---------- masthead / nav ---------- */

.site-head {
  border-bottom: 1px solid var(--rule);
  background: var(--ground);
  position: sticky; top: 0; z-index: 40;
}
.head-inner {
  max-width: var(--page); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  min-height: 62px;
}
.brand {
  font-family: var(--grotesk); font-weight: 700; font-size: 16px;
  letter-spacing: -.02em; color: var(--ink); text-decoration: none;
  display: flex; align-items: center; gap: 9px; white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 14px; flex: none; }
.brand-mark polyline { fill: none; stroke: var(--signal); stroke-width: 2; stroke-linejoin: round; }
.brand em { font-style: normal; color: var(--ink-faint); font-weight: 500; }

.site-nav { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-soft); text-decoration: none;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--signal); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--signal); }

@media (max-width: 720px) {
  .head-inner { flex-direction: column; align-items: flex-start; padding: 12px 18px; gap: 10px; }
  .site-head { position: static; }
  .site-nav { gap: 14px; }
}

/* ---------- hypnogram motif ---------- */

.hypno { width: 100%; height: auto; display: block; }
.hypno .trace { fill: none; stroke: var(--signal); stroke-width: 1.6; stroke-linejoin: miter; vector-effect: non-scaling-stroke; }
.hypno .grid  { stroke: var(--rule); stroke-width: 1; vector-effect: non-scaling-stroke; }
.hypno .lbl   { font-family: var(--mono); font-size: 9px; fill: var(--ink-faint); letter-spacing: .12em; }

@media (prefers-reduced-motion: no-preference) {
  .hypno.animate .trace {
    stroke-dasharray: 2600; stroke-dashoffset: 2600;
    animation: draw 2.4s cubic-bezier(.4,0,.2,1) .2s forwards;
  }
}
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ---------- hero ---------- */

.hero { padding: 56px 0 40px; border-bottom: 1px solid var(--rule); }
.hero-grid { display: grid; grid-template-columns: minmax(0,1fr); gap: 30px; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--data); margin: 0 0 16px;
}
h1 {
  font-family: var(--grotesk); font-weight: 700;
  font-size: clamp(2rem, 5.2vw, 3.25rem); line-height: 1.04;
  letter-spacing: -.03em; margin: 0 0 18px; text-wrap: balance;
}
.standfirst { font-size: 1.15rem; color: var(--ink-soft); max-width: 60ch; margin: 0 0 22px; }

/* ---------- typography ---------- */

h2 {
  font-family: var(--grotesk); font-weight: 650;
  font-size: clamp(1.35rem, 3vw, 1.8rem); line-height: 1.16;
  letter-spacing: -.02em; margin: 46px 0 14px; text-wrap: balance;
}
h3 {
  font-family: var(--grotesk); font-weight: 640; font-size: 1.1rem;
  letter-spacing: -.01em; margin: 32px 0 10px;
}
h4, h3.src-head {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .13em;
  text-transform: uppercase; color: var(--ink-faint); margin: 26px 0 8px; font-weight: 600;
}
h3.src-head { border-top: 1px solid var(--rule); padding-top: 18px; margin-top: 40px; }
p { margin: 0 0 17px; }
ul, ol { margin: 0 0 17px; padding-left: 1.2em; }
li { margin-bottom: 8px; }
li::marker { color: var(--ink-faint); }
strong { font-weight: 700; }
blockquote {
  margin: 24px 0; padding: 4px 0 4px 22px; border-left: 3px solid var(--signal);
  color: var(--ink-soft); font-size: 1.05rem;
}
hr { border: 0; border-top: 1px solid var(--rule); margin: 44px 0; }
code {
  font-family: var(--mono); font-size: .88em; background: var(--surface-sunk);
  padding: 1px 5px; border-radius: 2px;
}

/* ---------- section head ---------- */

.sec-head { border-top: 1px solid var(--rule-strong); padding-top: 12px; margin: 56px 0 20px; }
.sec-head .eyebrow { margin-bottom: 8px; color: var(--ink-faint); }
.sec-head h2 { margin: 0; }

/* ---------- article meta ---------- */

.artmeta {
  display: flex; flex-wrap: wrap; gap: 6px 20px; align-items: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-faint);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 11px 0; margin: 0 0 30px;
}
.artmeta a { color: var(--ink-soft); text-decoration: none; }
.artmeta a:hover { color: var(--signal); text-decoration: underline; }

.crumbs {
  font-family: var(--mono); font-size: 11px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-faint);
  padding: 18px 0 0; margin: 0;
}
.crumbs a { color: var(--ink-soft); text-decoration: none; }
.crumbs a:hover { color: var(--signal); text-decoration: underline; }
.crumbs span { padding: 0 7px; color: var(--rule-strong); }

/* ---------- answer box (AI-extraction target) ---------- */

.answer {
  background: var(--surface); border: 1px solid var(--rule);
  border-left: 4px solid var(--data);
  padding: 20px 22px; margin: 0 0 28px; box-shadow: var(--shadow-sm);
}
.answer .lbl {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .15em;
  text-transform: uppercase; color: var(--data); display: block; margin-bottom: 9px;
}
.answer p { margin-bottom: 0; font-size: 1.04rem; }
.answer p + p { margin-top: 12px; }

/* ---------- callouts ---------- */

.note, .caution, .disclose {
  padding: 16px 19px; margin: 0 0 24px; border: 1px solid var(--rule);
  background: var(--surface-sunk); font-size: .97rem;
}
.note .lbl, .caution .lbl, .disclose .lbl {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em;
  text-transform: uppercase; display: block; margin-bottom: 7px; color: var(--ink-faint);
}
.caution { background: var(--flag-soft); border-color: var(--flag); }
.caution .lbl { color: var(--flag); }
.note { background: var(--data-soft); border-color: var(--data); }
.note .lbl { color: var(--data); }
.note > :last-child, .caution > :last-child, .disclose > :last-child { margin-bottom: 0; }

.disclose { background: var(--signal-soft); border-color: var(--signal); font-size: .92rem; }
.disclose .lbl { color: var(--signal); }

/* ---------- status pill ---------- */

.pill {
  font-family: var(--mono); font-size: 10px; letter-spacing: .11em;
  text-transform: uppercase; padding: 3px 8px; border: 1px solid currentColor;
  display: inline-block; white-space: nowrap; line-height: 1.5;
}
.pill.live    { color: var(--data);   background: var(--data-soft); }
.pill.testing { color: var(--signal); background: var(--signal-soft); }
.pill.flag    { color: var(--flag);   background: var(--flag-soft); }

/* ---------- tables ---------- */

.tbl { overflow-x: auto; margin: 0 0 26px; border: 1px solid var(--rule); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-family: var(--grotesk); font-size: 14.5px; }
caption {
  caption-side: top; text-align: left; font-family: var(--mono);
  font-size: 10.5px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); padding: 13px 15px 11px; border-bottom: 1px solid var(--rule);
}
th, td { text-align: left; padding: 11px 15px; border-bottom: 1px solid var(--rule); vertical-align: top; line-height: 1.45; }
thead th {
  font-weight: 640; font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-soft); background: var(--surface-sunk); white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
tbody th { font-weight: 640; }
td.num, th.num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
td.win { color: var(--data); font-weight: 600; }

/* ---------- cards ---------- */

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); gap: 18px; margin: 0 0 30px; }
.card {
  background: var(--surface); border: 1px solid var(--rule); padding: 20px 21px 22px;
  display: flex; flex-direction: column; gap: 9px; text-decoration: none; color: inherit;
  transition: border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
a.card:hover { border-color: var(--signal); transform: translateY(-2px); box-shadow: var(--shadow-md); text-decoration: none; }
.card .kick {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .13em;
  text-transform: uppercase; color: var(--data);
}
.card h3 { margin: 0; font-size: 1.06rem; }
.card p { margin: 0; font-size: 15px; color: var(--ink-soft); }
.card .more {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--signal); margin-top: auto; padding-top: 4px;
}

/* ---------- spec grid ---------- */

.specs { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); margin: 0 0 26px; }
.specs div { background: var(--surface); padding: 15px 17px; }
.specs dt { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 5px; }
.specs dd { margin: 0; font-family: var(--grotesk); font-size: 1.15rem; font-weight: 650; letter-spacing: -.015em; font-variant-numeric: tabular-nums; }
.specs dd small { display: block; font-size: 12px; font-weight: 400; color: var(--ink-faint); letter-spacing: 0; margin-top: 3px; }

/* ---------- verdict ---------- */

.verdict { border: 1px solid var(--rule-strong); border-top: 3px solid var(--signal); background: var(--surface); padding: 24px 26px; margin: 0 0 30px; box-shadow: var(--shadow-md); }
.verdict h2 { margin: 0 0 12px; font-size: 1.3rem; }
.verdict > :last-child { margin-bottom: 0; }
.verdict .lbl { font-family: var(--mono); font-size: 10.5px; letter-spacing: .15em; text-transform: uppercase; color: var(--signal); display: block; margin-bottom: 10px; }

/* ---------- pick row ---------- */

.picks { display: grid; gap: 14px; margin: 0 0 28px; }
.pick { display: grid; grid-template-columns: 132px 1fr; gap: 0 22px; border: 1px solid var(--rule); background: var(--surface); padding: 18px 20px; align-items: start; }
.pick-for { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--data); line-height: 1.5; padding-top: 3px; }
.pick h3 { margin: 0 0 6px; font-size: 1.05rem; }
.pick p { margin: 0; font-size: 15px; color: var(--ink-soft); }
@media (max-width: 620px) { .pick { grid-template-columns: 1fr; gap: 8px; } }

/* ---------- FAQ ---------- */

.faq { border-top: 1px solid var(--rule); margin: 0 0 28px; }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  cursor: pointer; padding: 15px 34px 15px 0; position: relative; list-style: none;
  font-family: var(--grotesk); font-weight: 640; font-size: 1rem; letter-spacing: -.008em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); color: var(--signal); font-size: 18px; line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details > div { padding: 0 0 18px; }
.faq details > div > :last-child { margin-bottom: 0; }

/* ---------- next / related ---------- */

.next { border-top: 1px solid var(--rule-strong); margin-top: 54px; padding-top: 22px; }
.next h2 { margin-top: 0; font-size: 1.2rem; }
.next ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 2px; }
.next li { margin: 0; border-bottom: 1px solid var(--rule); }
.next li a { display: flex; gap: 14px; align-items: baseline; padding: 12px 0; text-decoration: none; color: var(--ink); font-family: var(--grotesk); font-size: 15px; font-weight: 600; }
.next li a:hover { color: var(--signal); }
.next li a span { font-family: var(--mono); font-size: 10.5px; letter-spacing: .11em; text-transform: uppercase; color: var(--ink-faint); flex: none; width: 92px; padding-top: 2px; }
@media (max-width: 560px) { .next li a { flex-direction: column; gap: 3px; } .next li a span { width: auto; } }

/* ---------- footer ---------- */

.site-foot { border-top: 2px solid var(--ink); margin-top: 80px; padding: 40px 0 56px; background: var(--surface-sunk); }
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 30px; margin-bottom: 34px; }
.foot-grid h2 { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 12px; font-weight: 600; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; }
.foot-grid li { margin-bottom: 7px; }
.foot-grid a { font-family: var(--grotesk); font-size: 14px; color: var(--ink-soft); text-decoration: none; }
.foot-grid a:hover { color: var(--signal); text-decoration: underline; }
.foot-legal { border-top: 1px solid var(--rule); padding-top: 20px; font-size: 13.5px; color: var(--ink-faint); max-width: 78ch; }
.foot-legal p { margin-bottom: 10px; }

/* ---------- utility ---------- */

.lede { font-size: 1.12rem; color: var(--ink-soft); }
.mono-note { font-family: var(--mono); font-size: 12px; letter-spacing: .05em; color: var(--ink-faint); }
.center-narrow { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.stack-lg > * + * { margin-top: 20px; }

@media (max-width: 620px) {
  body { font-size: 16.5px; }
  .shell { padding: 0 18px; }
  .hero { padding: 34px 0 28px; }
}