/* ==========================================================================
   Velqorena — "analyst's drafting paper"
   1. Tokens (light + dark app mode)
   2. Base & typography
   3. Layout helpers, buttons, cards
   4. Site header / nav / footer / cookie banner
   5. Marketing sections (hero, features, steps, tabs, FAQ)
   6. Inner pages (features, indicators, tools, ideas, learn, legal, contact, 404)
   7. Chart app
   8. Motion & responsive
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --paper: #F6F5F0;
  --surface: #FFFFFF;
  --grid: #E6E3D8;
  --border: #D9D5C7;
  --ink: #15171C;
  --text-2: #626775;
  --accent: #4B3FE0;
  --accent-ink: #3A2FC4;
  --accent-soft: #ECEAFD;
  --amber: #F2A516;
  --amber-soft: #FDF1D8;
  --up: #12A07A;
  --down: #E0484F;
  --up-text: #0B7A5C;
  --down-text: #C3353C;
  --focus: #4B3FE0;
  --shadow: 0 1px 2px rgba(0, 0, 0, .05);
  --shadow-lg: 0 12px 32px rgba(21, 23, 28, .12), 0 2px 6px rgba(21, 23, 28, .06);
  --radius: 10px;
  --font-head: "Space Grotesk", "Manrope", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --wrap: 1180px;
  --gutter: 24px;
  color-scheme: light;
}
/* Dark tokens apply to the chart app only (marketing pages stay on paper) */
:root[data-theme="dark"] .app-body,
:root[data-theme="dark"] body.app-body {
  --paper: #12131A;
  --surface: #1A1C25;
  --grid: #262938;
  --border: #2E3244;
  --ink: #E7E8EF;
  --text-2: #9A9EB0;
  --accent: #7C72FF;
  --accent-ink: #A59EFF;
  --accent-soft: #25244A;
  --amber-soft: #3A2F18;
  --up-text: #3CC79C;
  --down-text: #FF7A80;
  --focus: #A59EFF;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, .5);
}
:root[data-theme="dark"] { color-scheme: dark; }

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(98, 103, 117, .22) 1px, transparent 1.2px);
  background-size: 22px 22px;
  color: var(--ink);
  font: 400 16px/1.65 var(--font-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.015em; }
h1 { font-size: clamp(2.1rem, 1.4rem + 2.6vw, 3.4rem); }
h2 { font-size: clamp(1.55rem, 1.2rem + 1.2vw, 2.1rem); }
h3, .h3 { font-size: 1.18rem; font-weight: 500; letter-spacing: -.005em; }
p { margin: 0 0 1em; }
a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
strong { font-weight: 700; }
kbd { font: 500 .78rem/1 var(--font-mono); padding: 3px 6px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 5px; background: var(--surface); color: var(--ink); white-space: nowrap; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--text-2); }
.small { font-size: .86rem; }
.center { text-align: center; }
.grow { flex: 1 1 auto; min-width: 0; }
.is-up { color: var(--up-text); }
.is-down { color: var(--down-text); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 1000; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.skip-link:focus { top: 12px; color: #fff; }
main:focus { outline: none; }

/* ---------- 3. Layout helpers, buttons, cards ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.narrow { max-width: 820px; }
.section { padding: clamp(56px, 8vw, 104px) 0; }
.section-alt { background: rgba(255, 255, 255, .55); border-top: 1px solid var(--grid); border-bottom: 1px solid var(--grid); }
.section-lead { color: var(--text-2); font-size: 1.08rem; max-width: 640px; margin-bottom: 36px; }
.grid-3, .grid-2 { list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.card > .vq-icon { color: var(--accent); margin-bottom: 14px; }
.card p:last-child { margin-bottom: 0; }
.tag, .eyebrow { font: 500 .78rem/1.3 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 12px; }
.eyebrow::before { content: ""; display: inline-block; width: 18px; height: 2px; background: var(--amber); vertical-align: middle; margin-right: 10px; border-radius: 2px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 .98rem/1 var(--font-body); padding: 13px 20px; min-height: 44px;
  border-radius: 9px; border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: background-color .15s, border-color .15s, color .15s, transform .15s, box-shadow .15s;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 1px 0 rgba(21, 23, 28, .15), inset 0 1px 0 rgba(255, 255, 255, .15); }
.btn-primary:hover { background: var(--accent-ink); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-sm { padding: 9px 14px; min-height: 38px; font-size: .9rem; }
.btn-lg { padding: 15px 24px; font-size: 1.04rem; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.icon-btn {
  display: inline-grid; place-items: center; width: 34px; height: 34px; padding: 0; flex: none;
  border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--text-2); cursor: pointer;
}
.icon-btn:hover { background: var(--paper); color: var(--ink); border-color: var(--border); }
.icon-btn[aria-pressed="true"] { color: var(--accent); }
.text-link { font-weight: 600; text-decoration: none; }
.text-link:hover { text-decoration: underline; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.chip {
  font: 500 .86rem/1 var(--font-mono); padding: 9px 12px; min-height: 36px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink); cursor: pointer;
}
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--surface); }

/* Section headers with the self-drawing indigo trend line */
.sec-title { position: relative; display: inline-block; padding-bottom: 14px; margin-bottom: 18px; }
.sec-title > span { position: relative; z-index: 1; }
.scribble { position: absolute; left: -4px; right: -8px; bottom: 0; width: calc(100% + 12px); height: 16px; overflow: visible; }
.scribble path { opacity: 0; fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; vector-effect: non-scaling-stroke; transition: stroke-dashoffset 1.3s cubic-bezier(.65, 0, .35, 1), opacity .2s; }
.scribble.is-drawn path { opacity: 1; }

/* Chart containers */
.chart-box { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; position: relative; }
.chart-mount { position: relative; height: var(--h, 320px); }
.chart-mount canvas, .velq-canvas { width: 100%; height: 100%; display: block; }
.chart-mount canvas { cursor: crosshair; }
.chart-mount.is-drawing { box-shadow: inset 0 0 0 2px var(--accent); }
.chart-note { display: flex; gap: 8px; align-items: baseline; font-size: .84rem; color: var(--text-2); margin: 10px 2px 0; }
.dot-live { width: 7px; height: 7px; border-radius: 50%; background: var(--up); flex: none; display: inline-block; box-shadow: 0 0 0 3px rgba(18, 160, 122, .18); }

/* ---------- 4. Header / nav / footer / cookie ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(246, 245, 240, .88); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--grid); }
.header-in { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-name { font: 700 1.24rem/1 var(--font-head); letter-spacing: -.02em; }
.logo-mark { flex: none; color: var(--ink); }
.site-nav { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.site-nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.site-nav a:not(.btn) { display: block; padding: 8px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; font-weight: 500; font-size: .96rem; }
.site-nav a:not(.btn):hover { background: rgba(21, 23, 28, .05); }
.site-nav a[aria-current="page"] { color: var(--accent-ink); background: var(--accent-soft); }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); cursor: pointer; }
.burger, .burger::before, .burger::after { display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; margin: 0 auto; transition: transform .2s, opacity .2s; }
.burger { position: relative; }
.burger::before, .burger::after { content: ""; position: absolute; left: 0; }
.burger::before { top: -6px; } .burger::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .burger { background: transparent; }
.nav-toggle[aria-expanded="true"] .burger::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .burger::after { transform: translateY(-6px) rotate(-45deg); }

.disclaimer-strip { background: var(--amber-soft); border-top: 1px solid #EED7A5; border-bottom: 1px solid #EED7A5; padding: 18px 0; font-size: .93rem; }
.disclaimer-strip p { margin: 0; max-width: 940px; }
.site-footer { background: var(--surface); border-top: 1px solid var(--grid); padding: 56px 0 28px; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; }
.footer-brand p { color: var(--text-2); margin-top: 14px; max-width: 300px; }
.site-footer h2 { font: 500 .78rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); margin-bottom: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a:not(.brand) { color: var(--ink); text-decoration: none; }
.site-footer a:not(.brand):hover { color: var(--accent-ink); text-decoration: underline; }
.footer-base { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--grid); color: var(--text-2); font-size: .86rem; }
.footer-base p { margin: 0; }

.cookie {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 200; max-width: 760px; margin: 0 auto;
  display: flex; gap: 18px; align-items: center; padding: 16px 18px; background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-lg);
  transform: translateY(20px); opacity: 0; transition: transform .25s, opacity .25s;
}
.cookie.is-in { transform: none; opacity: 1; }
.cookie p { margin: 0; font-size: .9rem; line-height: 1.5; }
.cookie-actions { display: flex; gap: 8px; flex: none; }

/* ---------- 5. Marketing sections ---------- */
.hero { padding: clamp(40px, 6vw, 80px) 0 40px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: clamp(28px, 4vw, 56px); align-items: center; }
.hero h1 { margin-bottom: 20px; }
.hl { background: linear-gradient(transparent 62%, rgba(242, 165, 22, .38) 62%, rgba(242, 165, 22, .38) 90%, transparent 90%); padding: 0 2px; }
.lead { font-size: clamp(1.04rem, 1rem + .3vw, 1.2rem); color: var(--text-2); max-width: 620px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 22px; }
.hero-cta.center { justify-content: center; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 20px; list-style: none; padding: 0; margin: 0; font-size: .9rem; color: var(--text-2); }
.hero-points li::before { content: ""; display: inline-block; width: 10px; height: 2px; background: var(--accent); margin-right: 8px; vertical-align: middle; transform: rotate(-24deg); }
.chart-box.is-hero { box-shadow: var(--shadow-lg); }
.quote-strip { list-style: none; margin: 36px 0 0; padding: 0; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); overflow: hidden; }
.quote-strip li { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; padding: 12px 16px; border-left: 1px solid var(--grid); font-size: .86rem; }
.quote-strip li:first-child { border-left: 0; }
.q-sym { font: 600 .84rem/1.2 var(--font-head); grid-column: 1 / -1; }
.q-px { color: var(--ink); } .q-ch { text-align: right; }

.feature-card h3 { margin-top: 2px; }
.feature-card p { color: var(--text-2); }
.steps { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; counter-reset: s; }
.step { position: relative; }
.step-art { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 18px; box-shadow: var(--shadow); }
.step-art svg { width: 100%; height: auto; }
.step-no { display: inline-block; font-size: .8rem; color: var(--accent-ink); border: 1px solid var(--accent); border-radius: 999px; padding: 2px 9px; margin-bottom: 10px; }
.step p { color: var(--text-2); }
.il-card { fill: #FBFAF7; stroke: var(--border); }
.il-accent { fill: var(--accent); } .il-soft { fill: var(--grid); } .il-ink { fill: var(--ink); } .il-zone { fill: rgba(242, 165, 22, .25); stroke: var(--amber); }
.il-line { fill: none; stroke: var(--up); stroke-width: 2.2; stroke-linejoin: round; stroke-linecap: round; }
.il-draw { stroke: var(--accent); stroke-width: 2; stroke-dasharray: 5 4; }
.il-handle { fill: #fff; stroke: var(--accent); stroke-width: 2; }
.il-ink-line { stroke: var(--ink); stroke-width: 2.2; stroke-linecap: round; fill: none; }
.il-white-line { stroke: #fff; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; fill: none; }

.type-strip { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 40px; align-items: center; }
.tabs { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); margin: 8px 0 18px; }
.tabs [role="tab"] { font: 600 .92rem/1 var(--font-body); padding: 10px 14px; min-height: 40px; border: 0; border-radius: 8px; background: transparent; color: var(--text-2); cursor: pointer; }
.tabs [role="tab"]:hover { color: var(--ink); }
.tabs [role="tab"][aria-selected="true"] { background: var(--ink); color: var(--surface); }
.type-caption { color: var(--text-2); min-height: 3.3em; }

.article-card { display: flex; flex-direction: column; position: relative; transition: border-color .15s, transform .15s; }
.article-card h2, .article-card h3 { margin: 0 0 8px; }
.article-card h2 a, .article-card h3 a { color: var(--ink); text-decoration: none; }
.article-card h2 a::after, .article-card h3 a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.article-card:hover { border-color: var(--ink); }
.article-card:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }
.article-card a:focus-visible { outline: none; }
.article-card p { color: var(--text-2); flex: 1; }
.card-link { font-weight: 600; color: var(--accent-ink); font-size: .92rem; margin-top: 12px; }

.faq { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item h3 { margin: 0; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 20px 4px; background: none; border: 0; text-align: left; cursor: pointer; font: 500 1.08rem/1.35 var(--font-head); color: var(--ink); }
.faq-icon { position: relative; width: 14px; height: 14px; flex: none; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; left: 0; top: 6px; width: 14px; height: 2px; background: var(--accent); border-radius: 2px; transition: transform .2s; }
.faq-icon::after { transform: rotate(90deg); }
.faq-q[aria-expanded="true"] .faq-icon::after { transform: rotate(0); }
.faq-a { padding: 0 4px 20px; color: var(--text-2); max-width: 720px; }

/* ---------- 6. Inner pages ---------- */
.page-hero { padding: clamp(44px, 6vw, 84px) 0 clamp(24px, 3vw, 40px); }
.page-hero h1 { margin-bottom: 18px; }
.notice { margin-top: 24px; padding: 16px 18px; border: 1px solid #EED7A5; border-left: 4px solid var(--amber); border-radius: 8px; background: var(--amber-soft); font-size: .95rem; }

.features-list { display: grid; gap: clamp(48px, 7vw, 96px); padding: 24px var(--gutter) clamp(56px, 8vw, 104px); }
.feature-row { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: clamp(24px, 4vw, 56px); align-items: center; }
.feature-row.is-flip .feature-text { order: 2; }
.feature-text p { color: var(--text-2); }

.ind-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; padding-bottom: 80px; align-items: start; }
.toc { position: sticky; top: 92px; font-size: .9rem; }
.toc h2 { font: 500 .78rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); margin-bottom: 12px; }
.toc ol { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; border-left: 2px solid transparent; color: var(--text-2); text-decoration: none; }
.toc a:hover { color: var(--ink); border-left-color: var(--accent); }
.ind-list { display: grid; gap: 28px; }
.ind-sec { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; scroll-margin-top: 90px; }
.ind-text h3 { font-size: .98rem; margin: 18px 0 6px; }
.ind-text p { color: var(--text-2); font-size: .97rem; }
.defaults { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; margin: 0; }
.defaults div { border: 1px solid var(--grid); border-radius: 8px; padding: 8px 10px; background: var(--paper); }
.defaults dt { font-size: .76rem; color: var(--text-2); }
.defaults dd { margin: 0; font-size: .9rem; }
.ind-media { align-self: center; }

.jump ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 32px; padding: 0; }
.jump a { display: inline-block; padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--ink); text-decoration: none; font-weight: 500; font-size: .92rem; }
.jump a:hover { border-color: var(--ink); }
.tool-group-sec { margin-bottom: clamp(44px, 6vw, 72px); scroll-margin-top: 90px; }
.tool-card { display: flex; flex-direction: column; gap: 12px; scroll-margin-top: 90px; }
.tool-card p { color: var(--text-2); margin: 0; font-size: .95rem; }
.tool-head { display: flex; align-items: center; gap: 12px; }
.tool-head h3 { margin: 0; flex: 1; }
.tool-ic { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 9px; background: var(--accent-soft); color: var(--accent); flex: none; }
.tool-card .chart-box { box-shadow: none; }
.tool-card .chart-mount canvas { touch-action: none; }
.tool-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.tool-actions [aria-pressed="true"] { background: var(--ink); }
.tool-status { font-size: .82rem; color: var(--text-2); }
.util-panel { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 20px; }
.util-buttons { display: grid; gap: 6px; align-content: start; }
.util-btn { display: flex; gap: 12px; align-items: flex-start; text-align: left; padding: 10px; border: 1px solid var(--grid); border-radius: 9px; background: var(--surface); cursor: pointer; color: var(--ink); font: inherit; }
.util-btn:hover { border-color: var(--ink); }
.util-btn[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.util-btn strong { display: block; font-size: .93rem; }
.util-btn small { color: var(--text-2); font-size: .8rem; line-height: 1.4; display: block; }
.util-btn .tool-ic { width: 32px; height: 32px; }

.ideas-list { display: grid; gap: 32px; padding-bottom: 80px; }
.idea { padding: 0; overflow: hidden; scroll-margin-top: 90px; }
.idea-head { padding: 24px 28px 18px; }
.idea-head h2 { margin: 0; font-size: clamp(1.3rem, 1.1rem + .8vw, 1.7rem); }
.idea .chart-box { border-radius: 0; border-left: 0; border-right: 0; box-shadow: none; }
.idea-body { padding: 22px 28px 4px; columns: 2 320px; column-gap: 36px; color: var(--text-2); }
.idea-body p { break-inside: avoid; }
.idea-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; padding: 8px 28px 26px; margin: 0; font-size: .86rem; }

.article-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); gap: 48px; padding-bottom: 72px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 22px; font-size: .88rem; color: var(--text-2); }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--border); }
.crumbs a { color: var(--text-2); }
.prose { font-size: 1.05rem; }
.prose h2 { font-size: 1.5rem; margin-top: 1.6em; scroll-margin-top: 90px; }
.prose h2:first-child { margin-top: 0; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: .4em; }
.prose .chart-box { margin: 24px 0 6px; }
.figcap { font-size: .84rem; color: var(--text-2); }
.note-box { margin-top: 36px; padding: 14px 16px; border-left: 3px solid var(--amber); background: var(--amber-soft); border-radius: 6px; font-size: .92rem; }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px; }
.prevnext a { display: block; padding: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); text-decoration: none; color: var(--ink); font-weight: 600; }
.prevnext a:hover { border-color: var(--ink); }
.prevnext small { display: block; font: 500 .74rem/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-2); }
.prevnext .next { text-align: right; }
.learn-grid { padding-bottom: 80px; }
.legal .prose h2 { font-size: 1.25rem; }

.about { padding-bottom: 80px; }
.principles { display: grid; gap: 16px; margin: 8px 0 48px; }
.principle { display: grid; grid-template-columns: auto 1fr; column-gap: 18px; }
.principle .p-no { grid-row: span 2; font-size: .86rem; color: var(--accent-ink); padding-top: 4px; }
.principle h3 { margin-bottom: 6px; }
.principle p { color: var(--text-2); }

.contact-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 24px; padding-bottom: 80px; align-items: start; }
.form-card { padding: 28px; }
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field label, .field > span { font-weight: 600; font-size: .94rem; }
.field input, .field select, .field textarea, .layout-form input, .dlg-search input {
  width: 100%; font: 400 1rem/1.4 var(--font-body); color: var(--ink); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 11px 12px; min-height: 44px;
}
.field textarea { resize: vertical; min-height: 140px; }
.field input:focus, .field select:focus, .field textarea:focus, .layout-form input:focus { outline: 2px solid var(--focus); outline-offset: 0; border-color: var(--focus); }
.field [aria-invalid="true"] { border-color: var(--down); background: #FFF7F7; }
.field-error { color: var(--down-text); font-size: .86rem; margin: 0; min-height: 1.2em; }
.field-meta { display: flex; justify-content: space-between; gap: 12px; }
.contact-done { text-align: center; padding: 20px 8px; }
.contact-done svg { margin: 0 auto 14px; }
.contact-done:focus { outline: none; }
.contact-side { display: grid; gap: 16px; }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; color: var(--text-2); font-size: .95rem; }
.ticks li { padding-left: 22px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 10px; height: 6px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

.nf .nf-art { width: min(380px, 100%); margin: 0 auto 24px; overflow: visible; }
.nf-grid { stroke: var(--grid); stroke-width: 1; }
.nf-line { fill: none; stroke: var(--up); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.nf-drop { stroke: var(--down); stroke-width: 3; stroke-dasharray: 4 5; stroke-linecap: round; }
.nf-dot { fill: var(--down); }
.nf-label { font: 700 38px var(--font-head); fill: var(--accent); }

/* ---------- 7. Chart app ---------- */
body.app-body { background-image: none; overflow: hidden; height: 100%; }
.app {
  height: 100vh; height: 100dvh; display: grid; background: var(--paper); color: var(--ink);
  grid-template-columns: 50px minmax(0, 1fr) 290px;
  grid-template-rows: 50px minmax(0, 1fr) 32px;
  grid-template-areas: "top top top" "left main right" "foot foot foot";
}
.app.panel-hidden { grid-template-columns: 50px minmax(0, 1fr) 0; }
.app.panel-hidden .app-right { display: none; }
.app.is-pseudo-fs { position: fixed; inset: 0; z-index: 400; }

.app-top { grid-area: top; display: flex; align-items: center; gap: 6px; padding: 0 8px 0 10px; background: var(--surface); border-bottom: 1px solid var(--border); min-width: 0; }
.app-logo { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; color: var(--ink); flex: none; }
.app-logo:hover { background: var(--paper); }
.app-logo .logo-mark { width: 26px; height: 26px; }
.app-toolbar { display: flex; align-items: center; gap: 2px; flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.app-toolbar::-webkit-scrollbar { display: none; }
.tb-btn {
  position: relative; display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 9px; flex: none;
  border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--ink); cursor: pointer;
  font: 500 .9rem/1 var(--font-body); white-space: nowrap;
}
.tb-btn .vq-icon { color: var(--text-2); }
.tb-btn:hover { background: var(--paper); }
.tb-btn:hover .vq-icon { color: var(--ink); }
.tb-btn[aria-pressed="true"], .tb-btn[aria-expanded="true"] { background: var(--accent-soft); color: var(--accent-ink); }
.tb-btn[aria-pressed="true"] .vq-icon { color: var(--accent); }
.tb-btn:disabled { opacity: .38; cursor: default; background: transparent; }
.tb-symbol { font: 700 .98rem/1 var(--font-head); padding: 0 10px; border-color: var(--border); }
.sym-price { font-size: .84rem; font-weight: 500; }
.tb-sep { width: 1px; height: 22px; background: var(--border); margin: 0 6px; flex: none; }
.tb-spacer { flex: 1; min-width: 8px; }
.tf-group { display: flex; gap: 1px; flex: none; }
.tb-tf { font: 500 .86rem/1 var(--font-mono); padding: 0 8px; }
.tb-select { height: 36px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--ink); font: 500 .9rem var(--font-mono); padding: 0 8px; }

.app-left { grid-area: left; background: var(--surface); border-right: 1px solid var(--border); overflow-y: auto; overflow-x: visible; scrollbar-width: none; }
.app-left::-webkit-scrollbar { display: none; }
.tools { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 0 12px; }
.tool-btn { position: relative; display: grid; place-items: center; width: 38px; height: 36px; border: 0; border-radius: 8px; background: transparent; color: var(--text-2); cursor: pointer; }
.tool-btn:hover { background: var(--paper); color: var(--ink); }
.tool-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }
.tool-sep { width: 26px; height: 1px; background: var(--border); margin: 6px 0; }
.tool-group { position: relative; display: flex; align-items: center; }
.tool-caret { position: absolute; right: -9px; top: 50%; transform: translateY(-50%); width: 12px; height: 22px; display: grid; place-items: center; border: 0; background: transparent; color: var(--text-2); cursor: pointer; border-radius: 4px; padding: 0; opacity: .7; }
.tool-caret:hover, .tool-caret[aria-expanded="true"] { background: var(--paper); color: var(--ink); opacity: 1; }
.flyout, .menu {
  position: fixed; z-index: 300; min-width: 230px; padding: 6px; background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow-lg);
}
.flyout-title, .menu-title { font: 500 .72rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); margin: 8px 10px; }
.flyout button, .menu [role="menuitemradio"], .menu-foot {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; min-height: 36px; border: 0; border-radius: 7px;
  background: transparent; color: var(--ink); font: 500 .92rem/1.2 var(--font-body); text-align: left; cursor: pointer;
}
.flyout button span { flex: 1; }
.flyout button:hover, .flyout button:focus-visible, .menu [role="menuitemradio"]:hover, .menu-foot:hover, .menu [role="menuitemradio"]:focus-visible { background: var(--paper); outline: none; }
.flyout .vq-icon { color: var(--text-2); }
.flyout kbd { font-size: .7rem; padding: 2px 5px; }
.menu [role="menuitemradio"][aria-checked="true"] { color: var(--accent-ink); font-weight: 700; }
.menu [role="menuitemradio"][aria-checked="true"]::after { content: ""; margin-left: auto; width: 10px; height: 6px; border-left: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg) translateY(-2px); }
.menu-wide { width: 320px; }
.layout-form { padding: 8px 10px 4px; }
.layout-form .row { display: flex; gap: 6px; margin-top: 6px; }
.layout-form input { min-height: 38px; padding: 7px 10px; font-size: .92rem; }
.layout-list { list-style: none; margin: 0; padding: 0; max-height: 240px; overflow: auto; }
.layout-list li { display: flex; align-items: center; gap: 4px; }
.layout-list [data-load] { display: grid; text-align: left; padding: 8px 10px; border: 0; background: transparent; border-radius: 7px; color: var(--ink); cursor: pointer; font: inherit; }
.layout-list [data-load]:hover { background: var(--paper); }
.layout-list small { color: var(--text-2); font-size: .78rem; }
.menu-foot { border-top: 1px solid var(--grid); border-radius: 0 0 7px 7px; margin-top: 4px; color: var(--text-2); }
.menu-note { margin: 4px 10px 6px; }
.empty { color: var(--text-2); font-size: .88rem; padding: 10px; list-style: none; }

.app-main { grid-area: main; position: relative; min-width: 0; min-height: 0; background: var(--surface); }
.chart-wrap { position: absolute; inset: 0; }
.chart-wrap canvas { width: 100%; height: 100%; touch-action: none; outline: none; }
.chart-wrap canvas:focus-visible { box-shadow: inset 0 0 0 2px var(--focus); }
.tool-hint { position: absolute; left: 50%; bottom: 40px; transform: translateX(-50%); margin: 0; padding: 7px 12px; border-radius: 8px; background: var(--ink); color: var(--surface); font-size: .84rem; white-space: nowrap; pointer-events: none; box-shadow: var(--shadow-lg); max-width: calc(100% - 24px); overflow: hidden; text-overflow: ellipsis; }
.style-pop { position: absolute; top: 10px; right: 84px; display: flex; align-items: center; flex-wrap: wrap; gap: 6px; padding: 6px 8px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow-lg); max-width: calc(100% - 24px); z-index: 5; }
.pop-name { font: 600 .82rem/1 var(--font-head); padding: 0 6px 0 4px; color: var(--text-2); }
.pop-row { display: flex; gap: 3px; }
.swatch-btn { width: 22px; height: 22px; border-radius: 6px; border: 2px solid var(--surface); background: var(--c); cursor: pointer; box-shadow: 0 0 0 1px var(--border); padding: 0; }
.swatch-btn[aria-pressed="true"] { box-shadow: 0 0 0 2px var(--ink); }
.pop-field select { height: 30px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); color: var(--ink); font: 500 .82rem var(--font-body); padding: 0 6px; }
.pop-range { display: flex; align-items: center; gap: 6px; font-size: .8rem; color: var(--text-2); }
.pop-range input { width: 80px; accent-color: var(--accent); }
.pop-btn { height: 30px; padding: 0 10px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); color: var(--ink); font: 600 .82rem var(--font-body); cursor: pointer; }
.style-pop .icon-btn { width: 30px; height: 30px; }

.app-right { grid-area: right; display: flex; flex-direction: column; min-height: 0; background: var(--surface); border-left: 1px solid var(--border); outline: none; }
.side-head { display: flex; align-items: center; border-bottom: 1px solid var(--border); padding: 0 6px; }
.side-tabs { display: flex; gap: 2px; flex: 1; }
.side-tabs [role="tab"] { flex: 1; height: 42px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--text-2); font: 600 .9rem var(--font-body); cursor: pointer; }
.side-tabs [role="tab"][aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.count { font-size: .72rem; background: var(--paper); border: 1px solid var(--border); border-radius: 999px; padding: 1px 6px; margin-left: 4px; }
.side-body { flex: 1; overflow: auto; min-height: 0; }
.watch-head { display: grid; grid-template-columns: 1fr 88px 64px; gap: 6px; padding: 8px 12px 6px; font: 500 .7rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-2); }
.watch-head span:not(:first-child) { text-align: right; }
.watchlist, .obj-list { list-style: none; margin: 0; padding: 0; }
.watch-row { display: grid; grid-template-columns: 1fr 88px 64px; gap: 6px; align-items: center; width: 100%; padding: 8px 12px; border: 0; border-left: 2px solid transparent; background: transparent; color: var(--ink); text-align: left; cursor: pointer; font: inherit; }
.watch-row:hover { background: var(--paper); }
.watch-row[aria-current="true"] { background: var(--accent-soft); border-left-color: var(--accent); }
.w-sym { font: 700 .9rem/1.2 var(--font-head); min-width: 0; }
.w-sym small { display: block; font: 400 .74rem/1.2 var(--font-body); color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.w-px, .w-ch { font-size: .82rem; text-align: right; border-radius: 4px; padding: 1px 3px; }
.flash-up { animation: flashUp .9s ease-out; } .flash-down { animation: flashDown .9s ease-out; }
@keyframes flashUp { from { background: rgba(18, 160, 122, .25); } to { background: transparent; } }
@keyframes flashDown { from { background: rgba(224, 72, 79, .25); } to { background: transparent; } }
.side-h { font: 500 .72rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); margin: 16px 12px 6px; }
.obj-row { display: flex; align-items: center; gap: 4px; padding: 2px 6px 2px 12px; min-height: 38px; font-size: .88rem; }
.obj-row:hover { background: var(--paper); }
.obj-row.is-selected { background: var(--accent-soft); }
.obj-row .icon-btn { width: 30px; height: 30px; }
.swatch { width: 10px; height: 10px; border-radius: 3px; flex: none; margin-right: 6px; }
.obj-ic { display: grid; place-items: center; flex: none; margin-right: 4px; }
.obj-name { border: 0; background: transparent; text-align: left; color: var(--ink); font: inherit; cursor: pointer; padding: 6px 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.is-dim { opacity: .5; }

.app-foot { grid-area: foot; display: flex; align-items: center; gap: 16px; padding: 0 12px; background: var(--surface); border-top: 1px solid var(--border); font-size: .78rem; color: var(--text-2); min-width: 0; }
.app-foot p { margin: 0; white-space: nowrap; }
.foot-note { display: flex; align-items: center; gap: 8px; }
.foot-disc { overflow: hidden; text-overflow: ellipsis; }
.foot-disc a { color: var(--text-2); }
.foot-ctl { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.foot-ctl .icon-btn { width: 28px; height: 26px; }
.clock { margin-left: 8px; font-size: .78rem; }
.app-mbar { grid-area: mbar; display: none; }

/* tooltips (pointer devices only) */
@media (hover: hover) {
  .tb-btn[data-tip]:hover::after, .tool-btn[data-tip]:hover::after {
    content: attr(data-tip); position: absolute; z-index: 20; pointer-events: none; white-space: nowrap;
    background: var(--ink); color: var(--surface); font: 500 .76rem/1 var(--font-body); padding: 7px 9px; border-radius: 6px;
  }
  .tb-btn[data-tip]:hover::after { top: calc(100% + 6px); left: 50%; transform: translateX(-50%); }
  .tool-btn[data-tip]:hover::after { left: calc(100% + 10px); top: 50%; transform: translateY(-50%); }
}
.app-toolbar { overflow-y: visible; }

/* dialogs */
.dlg {
  width: min(560px, calc(100vw - 24px)); max-height: min(86vh, 760px); padding: 0; border: 1px solid var(--border); border-radius: 14px;
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow-lg); overflow: auto;
}
.dlg-wide { width: min(860px, calc(100vw - 24px)); }
.dlg::backdrop { background: rgba(21, 23, 28, .38); backdrop-filter: blur(2px); }
.dlg > *:not(.dlg-head):not(form), .dlg form > *:not(.dlg-head) { margin-left: 20px; margin-right: 20px; }
.dlg-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 14px 12px 20px; background: var(--surface); border-bottom: 1px solid var(--grid); margin-bottom: 14px; }
.dlg-head h2 { font-size: 1.15rem; margin: 0; }
.dlg-search { display: flex; align-items: center; gap: 8px; border: 1px solid var(--border); border-radius: 9px; padding: 0 10px; color: var(--text-2); }
.dlg-search:focus-within { outline: 2px solid var(--focus); border-color: var(--focus); }
.dlg-search input { border: 0; padding: 10px 0; outline: none; min-height: 42px; background: transparent; }
.dlg-foot { display: flex; align-items: center; gap: 8px; padding: 14px 0 18px; }
.sym-list { list-style: none; padding: 0; margin-top: 10px; max-height: 420px; overflow: auto; }
.sym-list li[role="option"] { display: grid; grid-template-columns: 90px 1fr auto 72px; gap: 10px; align-items: center; padding: 10px; border-radius: 8px; cursor: pointer; font-size: .92rem; }
.sym-list li[role="option"]:hover, .sym-list li[role="option"]:focus { background: var(--paper); outline: none; }
.sym-list li[role="option"]:focus-visible { box-shadow: inset 0 0 0 2px var(--focus); }
.sym-list li[aria-selected="true"] { background: var(--accent-soft); }
.sym-list li[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }
.sym-id { font: 700 .95rem var(--font-head); }
.sym-name { color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sym-px, .sym-ch { text-align: right; font-size: .86rem; }
#ind-cats { margin: 12px 20px 8px; }
.ind-cols { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 20px; padding-bottom: 20px; }
.ind-pick { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; align-content: start; }
.ind-add { display: grid; grid-template-columns: 74px 1fr auto; grid-template-rows: auto auto; column-gap: 12px; align-items: center; width: 100%; padding: 10px 12px; border: 1px solid var(--grid); border-radius: 9px; background: var(--surface); color: var(--ink); text-align: left; cursor: pointer; font: inherit; }
.ind-add:hover { border-color: var(--accent); background: var(--accent-soft); }
.ind-short { grid-row: span 2; font-weight: 600; font-size: .86rem; color: var(--accent-ink); }
.ind-name { font-weight: 600; font-size: .93rem; }
.ind-where { grid-column: 2; font-size: .78rem; color: var(--text-2); }
.ind-plus { grid-column: 3; grid-row: 1 / span 2; font: 500 1.3rem/1 var(--font-mono); color: var(--accent); }
.ind-on { background: var(--paper); border: 1px solid var(--grid); border-radius: 10px; padding: 12px; align-self: start; }
.ind-on h3 { font-size: .95rem; margin-bottom: 6px; }
.ind-on .obj-list li { display: flex; align-items: center; gap: 4px; min-height: 36px; font-size: .88rem; padding-left: 4px; }
.set-fields fieldset { border: 1px solid var(--grid); border-radius: 10px; padding: 12px 14px 4px; margin: 0 0 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 0 14px; }
.set-fields legend { font: 500 .74rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); padding: 0 6px; }
.set-fields .field input { min-height: 40px; padding: 8px 10px; }
.field-color input { padding: 3px; height: 40px; cursor: pointer; }
#set-error { margin-top: 4px; }
.keys-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.keys-grid h3 { font-size: .95rem; }
.keys { margin: 0; display: grid; gap: 6px; }
.keys div { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; font-size: .86rem; border-bottom: 1px dashed var(--grid); padding-bottom: 6px; }
.keys dd { margin: 0; color: var(--text-2); text-align: right; }
.dlg > p.small { padding-bottom: 18px; }
.sheet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 6px; }
.sheet-tool { display: grid; justify-items: center; gap: 6px; padding: 12px 6px; min-height: 76px; border: 1px solid var(--grid); border-radius: 10px; background: var(--surface); color: var(--ink); font: 500 .78rem/1.2 var(--font-body); text-align: center; cursor: pointer; }
.sheet-tool .vq-icon { color: var(--text-2); }
.sheet-tool[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-ink); }
.sheet-tool[aria-pressed="true"] .vq-icon { color: var(--accent); }
.toast { position: fixed; left: 50%; bottom: 52px; z-index: 500; transform: translate(-50%, 16px); opacity: 0; pointer-events: none; padding: 10px 16px; border-radius: 9px; background: var(--ink); color: var(--surface); font-size: .88rem; font-weight: 600; box-shadow: var(--shadow-lg); transition: opacity .2s, transform .2s; max-width: calc(100vw - 32px); }
.toast.is-in { opacity: 1; transform: translate(-50%, 0); }
.only-mobile { display: none !important; }
.app-body .cookie { bottom: 44px; }

/* ---------- 8. Responsive & motion ---------- */
@media (max-width: 1100px) {
  .site-nav ul { gap: 0; }
  .site-nav a:not(.btn) { padding: 8px 9px; font-size: .92rem; }
  .ind-sec { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .app { grid-template-columns: 50px minmax(0, 1fr) 250px; }
  .tb-text { display: none; }
  .tb-symbol .tb-text, #sym-label { display: inline; }
}
@media (max-width: 960px) {
  .nav-toggle { display: grid; place-items: center; }
  .site-nav {
    position: fixed; inset: 69px 0 auto 0; z-index: 60; flex-direction: column; align-items: stretch; gap: 12px;
    padding: 16px var(--gutter) 24px; background: var(--paper); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    display: none; max-height: calc(100vh - 69px); overflow: auto;
  }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; }
  .site-nav a:not(.btn) { padding: 12px 10px; font-size: 1.05rem; border-bottom: 1px solid var(--grid); border-radius: 0; }
  .nav-cta { align-self: flex-start; }
  .hero-grid, .type-strip, .feature-row { grid-template-columns: minmax(0, 1fr); }
  .feature-row.is-flip .feature-text { order: 0; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: minmax(0, 1fr); max-width: 560px; }
  .quote-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .quote-strip li:nth-child(4) { border-left: 0; }
  .quote-strip li:nth-child(n+4) { border-top: 1px solid var(--grid); }
  .ind-layout, .article-layout { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; }
  .ind-layout .toc ol { display: flex; flex-wrap: wrap; border: 0; gap: 6px; }
  .ind-layout .toc a { border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; background: var(--surface); margin: 0; }
  .article-toc { display: none; }
  .contact-grid, .util-panel { grid-template-columns: minmax(0, 1fr); }
  .util-buttons { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .keys-grid { grid-template-columns: minmax(0, 1fr); }
  .ind-cols { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  :root { --gutter: 16px; }
  .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cookie { flex-direction: column; align-items: stretch; left: 12px; right: 12px; bottom: 12px; }
  .cookie-actions .btn { flex: 1; }
  .chart-box.is-hero .chart-mount { height: 320px; }
  .idea-head, .idea-body, .idea-foot { padding-left: 18px; padding-right: 18px; }
  .ind-sec { padding: 18px; }
  .prevnext { grid-template-columns: minmax(0, 1fr); }
  .prevnext .next { text-align: left; }
  .footer-base { flex-direction: column; }

  /* chart app on phones: toolbars move to bottom sheets */
  .only-mobile { display: revert !important; }
  .hide-mobile { display: none !important; }
  .app {
    grid-template-columns: minmax(0, 1fr); grid-template-rows: 48px minmax(0, 1fr) 26px 58px;
    grid-template-areas: "top" "main" "foot" "mbar";
  }
  .app.panel-hidden { grid-template-columns: minmax(0, 1fr); }
  .app-left { display: none; }
  .app-top { padding: 0 6px; }
  .tf-group { display: none; }
  .app-toolbar { gap: 6px; }
  .app-right, .app.panel-hidden .app-right {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 250; height: min(72vh, 560px);
    border: 1px solid var(--border); border-radius: 16px 16px 0 0; box-shadow: var(--shadow-lg);
    transform: translateY(105%); transition: transform .25s ease; visibility: hidden;
  }
  .app.sheet-panel .app-right { transform: none; visibility: visible; }
  .app-foot { font-size: .7rem; gap: 10px; padding: 0 8px; }
  .foot-disc, .clock { display: none; }
  .app-mbar { display: grid !important; grid-template-columns: repeat(4, 1fr); background: var(--surface); border-top: 1px solid var(--border); padding-bottom: env(safe-area-inset-bottom); }
  .app-mbar button { display: grid; justify-items: center; align-content: center; gap: 3px; border: 0; background: transparent; color: var(--ink); font: 600 .72rem/1 var(--font-body); cursor: pointer; }
  .app-mbar .vq-icon { color: var(--text-2); }
  .dlg.sheet { width: 100vw; max-width: 100vw; margin: auto 0 0; border-radius: 16px 16px 0 0; max-height: 80vh; }
  .style-pop { top: auto; bottom: 10px; }
  .tool-hint { bottom: auto; top: 64px; white-space: normal; text-align: center; }
  .sym-list li[role="option"] { grid-template-columns: 76px 1fr auto; }
  .sym-list .sym-name { display: none; }
  .menu, .flyout { max-width: calc(100vw - 16px); }
  .app-body .cookie { bottom: 64px; }
}
@media (max-width: 420px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-cta .btn { width: 100%; }
  .quote-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quote-strip li:nth-child(odd) { border-left: 0; }
  .quote-strip li:nth-child(4) { border-left: 1px solid var(--grid); }
  .quote-strip li:nth-child(n+3) { border-top: 1px solid var(--grid); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  html { scroll-behavior: auto; }
}
@media print {
  .site-header, .site-footer, .cookie, .disclaimer-strip { display: none; }
  body { background: #fff; }
}