/* ============================================================
   Trading Guide — dark navy-violet glass theme
   (style direction from AI_Solutions_v2, rebuilt as vanilla CSS)
   ============================================================ */
:root {
  --paper:       oklch(11% 0.035 274);
  --paper-2:     oklch(15% 0.05 274);
  --ink:         oklch(98% 0.005 270);
  --ink-soft:    oklch(82% 0.02 274);
  --muted:       oklch(72% 0.03 272);
  --faint:       oklch(56% 0.035 274);
  --line:        rgba(255,255,255,.10);
  --accent:      oklch(60% 0.22 278);
  --accent-soft: oklch(72% 0.18 278);
  --accent-deep: oklch(50% 0.21 281);
  --green: oklch(76% 0.14 155);
  --red:   oklch(72% 0.17 22);
  --amber: oklch(80% 0.13 80);
  --violet: oklch(74% 0.15 300);
  --font-sans: "Segoe UI", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Mono", Consolas, "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--accent); color: #fff; }
a { color: var(--accent-soft); text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent-soft); outline-offset: 3px; border-radius: 4px;
}

/* ---------- atmosphere ---------- */
#ambient {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(52% 44% at 80% 6%,  oklch(56% 0.22 279 / 0.26), transparent 70%),
    radial-gradient(46% 40% at 10% 26%, oklch(60% 0.16 293 / 0.17), transparent 72%),
    radial-gradient(60% 50% at 50% 108%, oklch(55% 0.20 277 / 0.15), transparent 70%);
  background-size: 130% 130%;
  animation: aurora 30s ease-in-out infinite alternate;
}
@keyframes aurora { 0% { background-position: 0% 0%; } 100% { background-position: 100% 60%; } }
#grain {
  position: fixed; inset: 0; z-index: 60; pointer-events: none;
  opacity: .05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 240px 240px;
}
#progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(90deg, oklch(64% 0.22 278), oklch(72% 0.16 292));
  z-index: 70; transition: width .1s linear;
}

/* ---------- layout ---------- */
.wrap { margin: 0 auto; width: 100%; max-width: 1150px; padding: 0 22px; }
main.wrap { padding-bottom: 60px; }

/* ---------- glass surface ---------- */
.glass {
  position: relative; border-radius: 22px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  box-shadow: inset 0 1px 0 0 rgba(255,255,255,.11), 0 26px 54px -26px rgba(0,0,0,.75);
  transition: border-color .4s, transform .4s, box-shadow .4s;
}
.glass::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(130% 90% at 14% -12%, rgba(255,255,255,.10), transparent 55%);
}
.glass-hover:hover {
  transform: translateY(-3px); border-color: rgba(255,255,255,.20);
  box-shadow: inset 0 1px 0 0 rgba(255,255,255,.13), 0 36px 64px -26px rgba(0,0,0,.85),
              0 0 64px -16px rgba(124,92,246,.42);
}

/* ---------- header / nav ---------- */
header.site {
  position: sticky; top: 0; z-index: 40; padding-top: 14px;
}
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px; padding: 10px 10px 10px 22px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); }
.brand .mark {
  display: inline-block; width: 28px; height: 28px; border-radius: 8px;
  border: 1px solid rgba(255,255,255,.20);
  background: linear-gradient(135deg, oklch(72% 0.18 278), oklch(48% 0.21 283));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.4);
}
.brand .name { font-size: 1.2rem; font-weight: 600; letter-spacing: -.01em; }
.brand .name b { color: var(--accent-soft); font-weight: 600; }

nav.main { display: none; align-items: center; gap: 26px;
  font-family: var(--font-mono); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .05em; color: var(--ink-soft); }
@media (min-width: 1020px) { nav.main { display: flex; } }

.ulink {
  color: inherit; padding: 8px 0;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1px; background-position: 0 100%; background-repeat: no-repeat;
  transition: background-size .35s cubic-bezier(.2,.7,.2,1), color .2s;
}
.ulink:hover { background-size: 100% 1px; color: var(--ink); }
.nav-active { color: var(--ink); }

.nav-dd { position: relative; }
.nav-dd > a .caret { font-size: .6rem; margin-left: 4px; }
.dd-panel {
  visibility: hidden; opacity: 0; position: absolute; left: 50%; top: 100%; z-index: 50;
  width: 300px; transform: translate(-50%, 8px);
  border-radius: 18px; border: 1px solid rgba(255,255,255,.10);
  background: oklch(16% 0.05 274 / 0.97);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  padding: 8px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 30px 60px -20px rgba(0,0,0,.85);
  transition: opacity .25s, transform .25s, visibility .25s;
}
.nav-dd:hover .dd-panel, .nav-dd:focus-within .dd-panel {
  visibility: visible; opacity: 1; transform: translate(-50%, 0);
}
.dd-link { display: block; border-radius: 12px; padding: 11px 14px; transition: background .2s; }
.dd-link:hover { background: rgba(255,255,255,.06); }
.dd-link strong { display: block; font-family: var(--font-sans); font-size: .96rem; font-weight: 500;
  text-transform: none; letter-spacing: 0; color: var(--ink); }
.dd-link small { display: block; margin-top: 2px; font-family: var(--font-sans); font-size: .82rem;
  text-transform: none; letter-spacing: 0; color: var(--muted); }

/* buttons */
.btn-primary {
  position: relative; display: inline-flex; align-items: center; gap: 9px; overflow: hidden;
  border-radius: 999px; padding: 11px 22px; cursor: pointer;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: .08em; color: #fff;
  background: linear-gradient(180deg, oklch(64% 0.22 278), oklch(50% 0.21 282));
  border: 1px solid rgba(255,255,255,.20);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 12px 30px -10px rgba(124,92,246,.55);
  transition: transform .25s, box-shadow .25s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.42), 0 18px 42px -10px rgba(124,92,246,.72);
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 9px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.04);
  padding: 10px 20px; cursor: pointer;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: .08em; color: var(--ink);
  backdrop-filter: blur(10px); transition: border-color .2s, background .2s;
}
.btn-ghost:hover { border-color: rgba(255,255,255,.30); background: rgba(255,255,255,.08); }
.btn-sheen::after {
  content: ""; position: absolute; top: 0; left: -130%; width: 55%; height: 100%;
  transform: skewX(-20deg); pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.45), transparent);
  transition: left .7s ease;
}
.btn-sheen:hover::after { left: 130%; }

/* mobile menu */
#mmBtn {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.04);
  color: var(--ink); cursor: pointer;
}
@media (min-width: 1020px) { #mmBtn { display: none; } }
#mmPanel { display: none; }
#mmPanel.open { display: block; }
@media (min-width: 1020px) { #mmPanel { display: none !important; } }
#mmPanel nav {
  margin-top: 8px; display: flex; flex-direction: column; padding: 8px;
  font-family: var(--font-mono); font-size: .82rem; text-transform: uppercase;
  letter-spacing: .05em; color: var(--ink-soft);
}
#mmPanel a { border-radius: 12px; padding: 12px 16px; color: inherit; }
#mmPanel a:hover { background: rgba(255,255,255,.06); }

/* ---------- typography blocks ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px; margin: 0 0 18px;
  font-family: var(--font-mono); font-size: .82rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .16em; color: var(--accent-soft);
}
.eyebrow::before {
  content: ""; width: 28px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.hero { padding: 56px 0 34px; }
.hero h1 {
  margin: 0; max-width: 22ch;
  font-size: clamp(2.3rem, 5.5vw, 4.2rem); font-weight: 500;
  line-height: 1.02; letter-spacing: -.03em;
}
.hero .sub { margin-top: 22px; max-width: 62ch; color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.4vw, 1.25rem); line-height: 1.55; }
.text-grad {
  background: linear-gradient(100deg, #ffffff 10%, oklch(72% 0.18 280) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin: 26px 0 6px; }

h2.section {
  margin: 46px 0 8px; font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 500;
  letter-spacing: -.02em; line-height: 1.05;
}
h2 .back-top { float: right; font-size: .8rem; margin-top: 10px; font-family: var(--font-mono);
  letter-spacing: .04em; color: var(--faint); }
h2 .back-top:hover { color: var(--accent-soft); }
.muted { color: var(--muted); }
p.muted.lead { max-width: 90ch; margin: 6px 0 22px; font-size: 1.02rem; }

/* legacy heading class from content fragments */
h2:not(.section) {
  margin: 46px 0 10px; font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 500;
  letter-spacing: -.02em; line-height: 1.05; border: none; padding: 0;
}

/* ---------- tags ---------- */
.tag {
  display: inline-block; font-family: var(--font-mono); font-size: .62rem; font-weight: 600;
  letter-spacing: .08em; padding: 3px 10px; border-radius: 999px;
  vertical-align: middle; text-transform: uppercase;
  border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.04);
}
.tag.trend    { color: var(--accent-soft); border-color: oklch(60% 0.22 278 / .45); background: oklch(60% 0.22 278 / .12); }
.tag.momentum { color: var(--green);  border-color: oklch(76% 0.14 155 / .40); background: oklch(76% 0.14 155 / .10); }
.tag.vol      { color: var(--amber);  border-color: oklch(80% 0.13 80 / .40);  background: oklch(80% 0.13 80 / .10); }
.tag.volume   { color: var(--violet); border-color: oklch(74% 0.15 300 / .40); background: oklch(74% 0.15 300 / .10); }
.tag.levels   { color: var(--red);    border-color: oklch(72% 0.17 22 / .40);  background: oklch(72% 0.17 22 / .10); }

/* ---------- collapsible cards ---------- */
details.card {
  position: relative; margin: 14px 0; border-radius: 20px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 0 rgba(255,255,255,.10), 0 20px 44px -24px rgba(0,0,0,.7);
  transition: border-color .3s, box-shadow .3s;
}
details.card:hover { border-color: rgba(255,255,255,.18); }
details.card[open] {
  border-color: oklch(60% 0.22 278 / .45);
  box-shadow: inset 0 1px 0 0 rgba(255,255,255,.12), 0 26px 54px -24px rgba(0,0,0,.8),
              0 0 54px -18px rgba(124,92,246,.35);
}
details.card > summary {
  cursor: pointer; padding: 16px 22px; font-weight: 600; font-size: 1.02rem;
  list-style: none; display: flex; align-items: center; gap: 12px; user-select: none;
  color: var(--ink); flex-wrap: wrap;
}
details.card > summary::-webkit-details-marker { display: none; }
details.card > summary::before {
  content: "▸"; color: var(--accent-soft); font-size: .9em; transition: transform .2s;
}
details.card[open] > summary::before { transform: rotate(90deg); }
details.card > .body {
  padding: 4px 24px 20px; border-top: 1px solid rgba(255,255,255,.08);
  color: var(--ink-soft); font-size: .98rem;
}
details.card > .body > *:first-child { margin-top: 14px; }
details.card strong { color: var(--ink); font-weight: 600; }

/* ---------- content elements ---------- */
code, .formula {
  font-family: var(--font-mono); font-size: .86em;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08);
  padding: 1px 7px; border-radius: 6px; color: var(--ink);
}
.formula { display: block; padding: 12px 16px; margin: 10px 0; white-space: pre-wrap;
  border-radius: 12px; line-height: 1.6; color: oklch(85% 0.06 278); }

.example, .trap {
  position: relative; margin: 14px 0; padding: 14px 18px; font-size: .95rem;
  border-radius: 14px; border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
}
.example { border-left: 3px solid var(--green); }
.trap    { border-left: 3px solid var(--red); }
.example .lbl, .trap .lbl {
  font-family: var(--font-mono); font-weight: 600; font-size: .68rem;
  text-transform: uppercase; letter-spacing: .1em;
}
.example .lbl { color: var(--green); }
.trap .lbl    { color: var(--red); }

.checklist {
  border-radius: 16px; border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03); padding: 14px 20px 14px 40px; margin: 14px 0;
}
.checklist li { margin: 7px 0; }
.checklist li::marker { color: var(--accent-soft); font-weight: 600; }

ul, ol { margin: 10px 0; padding-left: 26px; }
li { margin: 4px 0; }
li::marker { color: var(--faint); }
p { margin: 10px 0; }

.kv { margin: 10px 0; }
.kv dt { font-weight: 600; color: var(--ink); margin-top: 14px;
  font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase;
  letter-spacing: .1em; color: var(--accent-soft); }
.kv dd { margin: 4px 0 0 0; }

/* ---------- tables ---------- */
.table-scroll { overflow-x: auto; border-radius: 18px; border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03); backdrop-filter: blur(10px); }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.table-scroll table { margin: 0; }
th, td { padding: 11px 16px; text-align: left; vertical-align: top;
  border-bottom: 1px solid rgba(255,255,255,.07); }
th { font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .1em; color: var(--accent-soft); font-weight: 600;
  background: rgba(255,255,255,.04); }
tr:last-child td { border-bottom: none; }
tbody tr:hover td, table tr:hover td { background: rgba(255,255,255,.03); }
td a { color: var(--ink); font-weight: 500; }
td a:hover { color: var(--accent-soft); }

/* ---------- index feature cards ---------- */
.feature-grid { display: grid; gap: 18px; margin: 30px 0 10px; }
@media (min-width: 820px) { .feature-grid { grid-template-columns: repeat(3, 1fr); } }
.feature { display: block; padding: 26px; color: var(--ink-soft); }
.feature .num {
  display: inline-flex; height: 34px; align-items: center; border-radius: 10px; padding: 0 12px;
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .06em;
  color: oklch(80% 0.13 278);
  border: 1px solid oklch(60% 0.22 278 / .35);
  background: linear-gradient(180deg, oklch(60% 0.22 278 / .16), oklch(60% 0.22 278 / .06));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12);
}
.feature h3 { margin: 16px 0 8px; font-size: 1.3rem; font-weight: 500; color: var(--ink);
  letter-spacing: -.01em; }
.feature p { margin: 0; font-size: .96rem; color: var(--muted); }
.feature .go { display: inline-block; margin-top: 16px; font-family: var(--font-mono);
  font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent-soft); }

/* chips row on index */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.chip { border-radius: 999px; border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04); padding: 9px 18px;
  font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--ink-soft); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="2"] { transition-delay: .08s; }
.reveal[data-d="3"] { transition-delay: .16s; }

/* ---------- footer ---------- */
footer.site {
  margin-top: 70px; border-top: 1px solid rgba(255,255,255,.08);
  padding: 40px 0 50px; color: var(--muted); font-size: .9rem;
}
footer.site .cols { display: grid; gap: 28px; }
@media (min-width: 760px) { footer.site .cols { grid-template-columns: 2fr 1fr 1fr 1fr; } }
footer.site h4 { margin: 0 0 12px; font-family: var(--font-mono); font-size: .7rem;
  text-transform: uppercase; letter-spacing: .12em; color: var(--accent-soft); }
footer.site a { display: block; color: var(--muted); padding: 3px 0; }
footer.site a:hover { color: var(--ink); }
footer.site .fine { margin-top: 30px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.06);
  font-size: .8rem; color: var(--faint); }

/* legacy plain footer element inside content (single-page leftovers) */
main footer { margin-top: 40px; color: var(--faint); font-size: .85rem;
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 14px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  #ambient { animation: none; }
  #progress { transition: none; }
}