/* ============================================================
   Plainstocks homepage styles
   "The Ledger": a brass-and-ink research-terminal identity.
   ------------------------------------------------------------
   Themes: light is the base (:root). Dark is applied two ways:
   the viewer's OS preference (prefers-color-scheme) and an
   explicit [data-theme] set by the nav toggle in script.js.
   "Ink" tokens stay dark in BOTH themes on purpose: the hero
   card and charts read like a screenshot of a real terminal.
   ============================================================ */

:root {
  --bg:        #FBFAF6;
  --surface:   #FFFFFF;
  --surface-2: #F3F1EA;
  --text:      #1A1B16;
  --muted:     #5D5F53;
  --faint:     #8A8C7E;
  --border:    #E4E1D6;
  --border-2:  #D6D2C4;
  --accent:    #B77C1E;   /* amber, tuned for AA contrast on paper */
  --accent-2:  #C8892A;
  --accent-soft: #F6EBD6;
  --pos:       #2E8B6F;
  --neg:       #C0553C;

  /* Ink panels, intentionally dark in BOTH themes (a terminal screenshot) */
  --ink:        #14130E;
  --ink-2:      #1B1A12;
  --ink-text:   #F3F1E7;
  --ink-muted:  #A9A595;
  --ink-faint:  #746F60;
  --ink-border: rgba(231,169,60,0.16);
  --ink-line:   rgba(255,255,255,0.07);
  --ink-accent: #E7A93C;

  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1160px;
  --shadow: 0 1px 2px rgba(20,19,14,.04), 0 12px 34px -18px rgba(20,19,14,.18);
  --shadow-ink: 0 30px 70px -34px rgba(0,0,0,.7), 0 2px 0 rgba(255,255,255,.03) inset;
}

/* Dark via OS preference, but let an explicit light toggle win */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #100F0B;
    --surface:   #16150F;
    --surface-2: #1C1B14;
    --text:      #ECEAE0;
    --muted:     #9C998B;
    --faint:     #726F62;
    --border:    #2A2820;
    --border-2:  #383529;
    --accent:    #E7A93C;
    --accent-2:  #F0B451;
    --accent-soft: #241E10;
    --pos:       #43A98B;
    --neg:       #D9694E;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.7);
  }
}

/* Dark via explicit toggle, wins in both directions */
:root[data-theme="dark"] {
  --bg:        #100F0B;
  --surface:   #16150F;
  --surface-2: #1C1B14;
  --text:      #ECEAE0;
  --muted:     #9C998B;
  --faint:     #726F62;
  --border:    #2A2820;
  --border-2:  #383529;
  --accent:    #E7A93C;
  --accent-2:  #F0B451;
  --accent-soft: #241E10;
  --pos:       #43A98B;
  --neg:       #D9694E;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 40px -20px rgba(0,0,0,.7);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}
h1, h2, h3 {
  font-family: "Bricolage Grotesque", "IBM Plex Sans", sans-serif;
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-wrap: balance;
  overflow-wrap: break-word;
  margin: 0;
}
p { margin: 0; }
a { color: inherit; text-decoration: none; }
code { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: .9em; }
.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }
.tnum { font-variant-numeric: tabular-nums; }

/* The "ai" inside every "Plainstocks" wordmark, picked out in brass gold. */
.ai { color: var(--accent); }
.terminal .ai, .chart-card .ai, .cta .ai { color: var(--ink-accent); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--accent);
  opacity: .6;
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Nav ---------- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-in { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: "Bricolage Grotesque"; font-weight: 700; font-size: 19px; letter-spacing: -.02em; }
.brand .mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(150deg, var(--accent-2), var(--accent));
  display: grid; place-items: center; flex: none;
  box-shadow: 0 2px 8px -2px color-mix(in srgb, var(--accent) 60%, transparent);
}
.brand .mark span { color: #fff; font-family: "IBM Plex Mono"; font-weight: 600; font-size: 15px; line-height: 1; }
.brand .wordmark { white-space: nowrap; }
.nav-links { display: flex; gap: 26px; margin-left: 14px; }
.nav-links a { font-size: 14.5px; color: var(--muted); transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--surface); color: var(--muted); cursor: pointer;
  display: grid; place-items: center; transition: color .15s, border-color .15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-2); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "IBM Plex Sans"; font-size: 14.5px; font-weight: 500;
  padding: 10px 16px; border-radius: 10px; cursor: pointer;
  border: 1px solid transparent; transition: transform .12s, background .15s, box-shadow .15s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(160deg, var(--accent-2), var(--accent));
  color: #1a1305;
  font-weight: 600;
  box-shadow: 0 2px 10px -3px color-mix(in srgb, var(--accent) 65%, transparent);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 20px -6px color-mix(in srgb, var(--accent) 60%, transparent); }
.btn-ghost { border-color: var(--border-2); background: var(--surface); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.sm-only { display: none; }
.hero { position: relative; padding: 72px 0 80px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; }
/* Let grid children shrink below their content width (the ticker is very wide). */
.hero-copy, .hero-visual, .tr-grid > * { min-width: 0; }
.hero h1 { font-size: clamp(38px, 5.6vw, 62px); font-weight: 800; }
.hero h1 .plain { position: relative; color: var(--accent); white-space: nowrap; }
.hero h1 .plain::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .07em; height: .09em;
  background: var(--accent); opacity: .35; border-radius: 2px;
}
.hero .sub { margin-top: 22px; font-size: clamp(17px, 2vw, 20px); color: var(--muted); max-width: 33ch; }

.form { margin-top: 30px; display: flex; gap: 9px; max-width: 440px; flex-wrap: wrap; }
.form input[type="email"] {
  flex: 1 1 220px; min-width: 0;
  padding: 13px 15px; font-size: 15px; font-family: "IBM Plex Sans";
  border: 1px solid var(--border-2); border-radius: 10px;
  background: var(--surface); color: var(--text); transition: border-color .15s, box-shadow .15s;
}
.form input::placeholder { color: var(--faint); }
.form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.form-note { margin-top: 12px; font-size: 12.5px; color: var(--faint); display: flex; align-items: center; gap: 7px; }
.form-note svg { flex: none; }
.form-ok { margin-top: 14px; font-family: "IBM Plex Mono"; font-size: 13.5px; color: var(--pos); display: none; align-items: center; gap: 8px; }
.form-ok.show { display: flex; }

.trust { margin-top: 34px; display: flex; gap: 26px; flex-wrap: wrap; }
.trust .item { display: flex; flex-direction: column; gap: 2px; }
.trust .n { font-family: "Bricolage Grotesque"; font-weight: 700; font-size: 24px; letter-spacing: -.02em; }
.trust .l { font-family: "IBM Plex Mono"; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }

/* ---------- Terminal card (ink panel) ---------- */
.hero-visual { position: relative; }
.terminal {
  background: linear-gradient(168deg, var(--ink-2), var(--ink));
  border: 1px solid var(--ink-border);
  border-radius: 16px;
  box-shadow: var(--shadow-ink);
  overflow: hidden;
  color: var(--ink-text);
}
.term-top { display: flex; align-items: center; gap: 8px; padding: 12px 15px; border-bottom: 1px solid var(--ink-line); }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.term-title { margin-left: 8px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: "IBM Plex Mono"; font-size: 12px; color: var(--ink-muted); letter-spacing: .04em; }
.term-live { margin-left: auto; flex: none; font-family: "IBM Plex Mono"; font-size: 10.5px; letter-spacing: .12em; color: var(--ink-accent); display: flex; align-items: center; gap: 6px; }
.term-live .pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-accent); animation: pulse 2.2s infinite; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ink-accent) 55%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.ticker { overflow: hidden; border-bottom: 1px solid var(--ink-line); background: rgba(0,0,0,.18); }
.ticker-track { display: inline-flex; gap: 28px; padding: 8px 0; white-space: nowrap; animation: scroll 26s linear infinite; }
.ticker-item { font-family: "IBM Plex Mono"; font-size: 12px; color: var(--ink-muted); }
.ticker-item b { color: var(--ink-text); font-weight: 600; }
.ticker-item .up { color: var(--pos); }
.ticker-item .dn { color: var(--neg); }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.ledger { padding: 6px 4px 8px; }
.ledger-row {
  display: grid; grid-template-columns: 78px 60px 1fr auto; gap: 10px; align-items: center;
  padding: 11px 16px; border-bottom: 1px solid var(--ink-line); font-size: 13.5px;
}
.ledger-row:last-child { border-bottom: 0; }
.ledger-row .ts { font-family: "IBM Plex Mono"; font-size: 11px; color: var(--ink-faint); }
.ledger-row .tk { font-family: "IBM Plex Mono"; font-weight: 600; color: var(--ink-text); }
.tag { font-family: "IBM Plex Mono"; font-size: 10px; letter-spacing: .06em; text-transform: uppercase; padding: 3px 7px; border-radius: 999px; border: 1px solid var(--ink-border); color: var(--ink-muted); justify-self: start; }
.ledger-row .delta { font-family: "IBM Plex Mono"; font-weight: 600; font-size: 13px; text-align: right; }
.delta.up { color: var(--pos); }
.delta.dn { color: var(--neg); }
.term-foot { padding: 11px 16px; display: flex; align-items: center; justify-content: space-between; gap: 10px 12px; flex-wrap: wrap; border-top: 1px solid var(--ink-line); background: rgba(0,0,0,.15); }
.term-foot .lbl { font-family: "IBM Plex Mono"; font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); }
.spark-wrap { display: flex; align-items: center; gap: 10px; }
.spark-legend { font-family: "IBM Plex Mono"; font-size: 10.5px; color: var(--ink-muted); display: flex; gap: 12px; }
.spark-legend .k { display: inline-flex; align-items: center; gap: 5px; }
.swatch { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }

.illus-badge {
  position: absolute; top: 18px; right: 18px; z-index: 3;
  font-family: "IBM Plex Mono"; font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  padding: 5px 9px; border-radius: 7px; background: color-mix(in srgb, var(--accent) 15%, var(--surface));
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

/* faint grid backdrop behind the hero */
.grid-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 70% 30%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 70% 30%, #000 0%, transparent 75%);
}

/* ---------- Sections ---------- */
section { position: relative; }
.band { padding: 84px 0; }
.band.alt { background: var(--surface-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.sec-head { max-width: 640px; margin-bottom: 46px; }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 40px); margin-top: 16px; }
.sec-head p { margin-top: 15px; color: var(--muted); font-size: 18px; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px 28px;
}
.step .idx { font-family: "IBM Plex Mono"; font-size: 12px; color: var(--accent); letter-spacing: .1em; }
.step .ic { width: 42px; height: 42px; border-radius: 11px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; margin: 14px 0 16px; }
.step h3 { font-size: 19px; letter-spacing: -.01em; }
.step p { margin-top: 9px; color: var(--muted); font-size: 15px; }

/* why plain, feature list */
.feats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat { padding: 4px 2px; }
.feat .ic { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border-2); color: var(--accent); display: grid; place-items: center; margin-bottom: 16px; }
.feat h3 { font-size: 18px; }
.feat p { margin-top: 9px; color: var(--muted); font-size: 15px; }

/* track record */
.tr-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: center; }
.chart-card {
  background: linear-gradient(168deg, var(--ink-2), var(--ink));
  border: 1px solid var(--ink-border); border-radius: 16px; padding: 22px 22px 18px;
  box-shadow: var(--shadow-ink); color: var(--ink-text); position: relative;
}
.chart-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.chart-head .t { font-family: "IBM Plex Mono"; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-muted); }
.chart-legend { display: flex; gap: 16px; font-family: "IBM Plex Mono"; font-size: 12px; color: var(--ink-muted); }
.chart-legend .k { display: inline-flex; align-items: center; gap: 6px; }
canvas { display: block; width: 100%; height: auto; }
#spark { width: 128px; height: 32px; flex: none; }
.tr-list { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 14px; }
.tr-list li { display: flex; gap: 13px; align-items: flex-start; font-size: 15.5px; color: var(--muted); }
.tr-list .chk { flex: none; color: var(--accent); margin-top: 2px; }
.tr-list b { color: var(--text); font-weight: 600; }

/* strategies */
.strats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.strat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: border-color .18s, transform .18s; }
.strat:hover { border-color: var(--accent); transform: translateY(-3px); }
.strat .k { font-family: "IBM Plex Mono"; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
.strat h3 { margin-top: 6px; font-size: 20px; }
.strat p { margin-top: 10px; color: var(--muted); font-size: 15px; }
.strat .agent { margin-top: 16px; font-family: "IBM Plex Mono"; font-size: 12px; color: var(--accent); display: inline-flex; align-items: center; gap: 7px; }

/* CTA */
.cta {
  background: linear-gradient(168deg, var(--ink-2), var(--ink));
  border-radius: 22px; padding: 56px 40px; text-align: center; color: var(--ink-text);
  position: relative; overflow: hidden; border: 1px solid var(--ink-border); box-shadow: var(--shadow-ink);
}
.cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(120% 80% at 50% -10%, color-mix(in srgb, var(--ink-accent) 16%, transparent), transparent 60%); }
.cta > * { position: relative; }
.cta h2 { font-size: clamp(28px, 4vw, 42px); color: var(--ink-text); }
.cta p { margin-top: 14px; color: var(--ink-muted); font-size: 18px; }
.cta .form { margin: 26px auto 0; justify-content: center; }
.cta .form input { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.14); color: var(--ink-text); }
.cta .form input::placeholder { color: var(--ink-faint); }
.cta .form-note { justify-content: center; color: var(--ink-faint); }
.cta .form-note code { color: var(--ink-muted); }

/* disclaimer */
.disc-section { padding: 0 0 20px; }
.disc { border: 1px dashed var(--border-2); border-radius: var(--radius); padding: 20px 22px; display: flex; gap: 14px; align-items: flex-start; background: var(--surface); }
.disc .ic { flex: none; color: var(--accent); margin-top: 1px; }
.disc p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.disc b { color: var(--text); }

/* footer */
footer { border-top: 1px solid var(--border); padding: 40px 0 48px; margin-top: 10px; }
.foot-in { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-links a { font-size: 14px; color: var(--muted); }
.foot-links a:hover { color: var(--accent); }
.foot-copy { font-family: "IBM Plex Mono"; font-size: 12px; color: var(--faint); }

/* ---------- Responsive ---------- */

/* Tablet: collapse the two-column layouts, drop the inline nav links. */
@media (max-width: 900px) {
  .hero-grid, .tr-grid { grid-template-columns: 1fr; gap: 40px; }
  .steps, .feats, .strats { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding: 48px 0 60px; }
  .band { padding: 60px 0; }
  .sec-head { margin-bottom: 34px; }
}

/* Phones. */
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding: 0 18px; }

  /* Keep the nav on one row: tighter gaps, a lighter CTA button. */
  .nav-in { gap: 10px; }
  .brand { font-size: 17px; gap: 9px; }
  .nav-right { gap: 6px; }
  .btn { padding: 9px 13px; font-size: 14px; }
  .nav-right .lg-only { display: none; }
  .nav-right .sm-only { display: inline; }

  .hero { padding: 40px 0 52px; }
  .hero .sub { max-width: none; }
  .form { margin-top: 24px; }
  .trust { gap: 18px 22px; margin-top: 28px; }

  /* Ledger: tighter columns, hide the "vs SPY" suffix so nothing clips. */
  .ledger-row { grid-template-columns: 66px 46px 1fr auto; gap: 8px; padding: 10px 14px; font-size: 13px; }
  .ledger-row .vs { display: none; }
  .tag { font-size: 9.5px; padding: 3px 6px; }

  .cta { padding: 40px 22px; }
  .cta p { font-size: 16px; }
  .disc { padding: 18px; }
  .foot-in { gap: 18px; }
}

/* Small phones: stack the footer, ease the headline. */
@media (max-width: 380px) {
  .hero h1 { font-size: clamp(30px, 8.6vw, 40px); }
  .foot-in { flex-direction: column; align-items: flex-start; }
  .trust { flex-direction: column; gap: 14px; }
  .ledger-row { grid-template-columns: 60px 44px 1fr auto; }
}