/* RupyAI site styles.
   Layout: a term sheet. Section names sit in a narrow left column and the
   content sits in a wide right column. The corridor drawing in the hero is
   the one loud element. Everything else stays quiet. */

:root {
  color-scheme: light;
  /* colour: navy and sky blue from the logo, cool neutrals biased toward them */
  --bg: #F4F6FA;
  --surface: #FFFFFF;
  --sunk: #E9EEF5;
  --ink: #051A3A;
  --ink-2: #3D4C68;
  --ink-3: #5F6E8A;
  --line: #D5DCE8;
  --line-2: #A9B6CB;
  --sky: #00B0F8;
  --link: #0A66A8;
  --series-1: #0A66A8;
  --series-2: #D9622B;
  --logo: url(rupyai-logo.png);
  /* type: display serif used sparingly, a plain grotesque for reading, mono for figures */
  --f-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --f-body: "Libre Franklin", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
  --gutter: clamp(20px, 5vw, 48px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #051022;
    --surface: #0A1A33;
    --sunk: #0A1830;
    --ink: #EAF0FA;
    --ink-2: #B3C0D8;
    --ink-3: #8A9AB8;
    --line: #1C2C4A;
    --line-2: #3B5079;
    --sky: #1FB8FA;
    --link: #62C8FB;
    --series-1: #3D9BE9;
    --series-2: #D96A32;
    --logo: url(rupyai-logo-dark.png);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #051022;
  --surface: #0A1A33;
  --sunk: #0A1830;
  --ink: #EAF0FA;
  --ink-2: #B3C0D8;
  --ink-3: #8A9AB8;
  --line: #1C2C4A;
  --line-2: #3B5079;
  --sky: #1FB8FA;
  --link: #62C8FB;
  --series-1: #3D9BE9;
  --series-2: #D96A32;
  --logo: url(rupyai-logo-dark.png);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
h1, h2, h3 { font-family: var(--f-display); font-weight: 400; margin: 0; text-wrap: balance; }
p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
img, svg { max-width: 100%; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; border-radius: 2px; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -60px; background: var(--surface); color: var(--ink); padding: 8px 12px; border: 1px solid var(--line-2); z-index: 5; }
.skip:focus { top: 12px; }
.nb { white-space: nowrap; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

/* header */
.site-header { display: flex; align-items: center; gap: 12px 24px; padding-block: 22px; }
.brand { display: block; flex: none; }
.brand-mark { display: block; width: 122px; aspect-ratio: 360 / 106; background: var(--logo) left center / contain no-repeat; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 2px 22px; margin-left: auto; font-size: 0.875rem; }
.nav a { color: var(--ink-2); text-decoration: none; padding-block: 6px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }
.theme-toggle {
  flex: none; font: 500 0.75rem/1 var(--f-body); letter-spacing: 0.04em; color: var(--ink-2);
  background: none; border: 1px solid var(--line-2); border-radius: 999px; padding: 7px 12px; cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
@media (max-width: 800px) { .nav a.opt { display: none; } }
@media (max-width: 480px) { .nav a.opt-2 { display: none; } .nav { gap: 2px 18px; } }

/* hero */
.hero { padding-block: clamp(36px, 6.5vw, 84px) clamp(44px, 6vw, 80px); }
.eyebrow { font: 600 0.75rem/1.3 var(--f-body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.hero h1 { font-size: clamp(2.15rem, 5.5vw, 4rem); line-height: 1.05; letter-spacing: -0.015em; max-width: 23ch; margin-top: 18px; }
.lede { font-size: clamp(1.0625rem, 1.55vw, 1.25rem); line-height: 1.55; color: var(--ink-2); max-width: 58ch; margin-top: 26px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 26px; font-size: 0.9375rem; }

/* corridor drawing */
.corridor { margin-top: clamp(20px, 3vw, 36px); }
.corridor svg { display: block; width: 100%; height: auto; overflow: visible; }
.corridor .narrow { display: none; }
@media (max-width: 640px) {
  .corridor .wide { display: none; }
  .corridor .narrow { display: block; }
}
.sk { fill: none; stroke: var(--ink); stroke-width: 1.15; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.sk-2 { stroke: var(--line-2); }
.sk-fine { stroke-width: 0.8; }
.sk-dash { stroke-dasharray: 2 5; }
.arc { fill: none; stroke: var(--sky); stroke-width: 1.3; vector-effect: non-scaling-stroke; }
.arc-end { fill: var(--bg); stroke: var(--sky); stroke-width: 1.3; vector-effect: non-scaling-stroke; }
.mk-e { fill: var(--sky); }
.mk-w { fill: var(--bg); stroke: var(--ink); stroke-width: 1.15; vector-effect: non-scaling-stroke; }
.mk-static { display: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mk { display: none; }
  .mk-static { display: block; }
}
.clock { display: flex; justify-content: space-between; gap: 16px; margin-top: 12px; font: 400 0.8125rem/1.3 var(--f-mono); color: var(--ink-2); }
.clock b { font: 600 0.6875rem/1.3 var(--f-body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin-right: 8px; }
.clock time { color: var(--ink); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* sections: label column + content column */
.sec {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 3.3fr);
  column-gap: clamp(24px, 5vw, 72px); row-gap: 22px;
  padding-block: clamp(48px, 7.5vw, 100px);
  border-top: 1px solid var(--line);
}
.sec > h2 { font-size: clamp(1.6rem, 2.5vw, 2.05rem); line-height: 1.1; letter-spacing: -0.01em; }
.sec-body { min-width: 0; display: flex; flex-direction: column; gap: clamp(26px, 3.2vw, 40px); }
.intro { font: 400 clamp(1.3rem, 2.1vw, 1.6rem)/1.3 var(--f-display); max-width: 34em; text-wrap: pretty; }
@media (max-width: 860px) { .sec { grid-template-columns: minmax(0, 1fr); } }

/* ruled rows: services and method */
.rows { list-style: none; border-top: 1px solid var(--line); }
.rows > li, .rows > div {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
  gap: 8px clamp(20px, 3vw, 44px); padding-block: 22px; border-bottom: 1px solid var(--line);
}
.rows > :last-child { border-bottom: 0; padding-bottom: 0; }
.rows h3, .rows dt { font: 400 1.3rem/1.22 var(--f-display); }
.rows p, .rows dd { color: var(--ink-2); max-width: 60ch; }
.num { display: block; font: 400 0.75rem/1 var(--f-mono); color: var(--ink-3); margin-bottom: 8px; font-variant-numeric: tabular-nums; }
@media (max-width: 620px) { .rows > li, .rows > div { grid-template-columns: minmax(0, 1fr); } }

/* plain grids: focus, tools, questions */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px clamp(24px, 4vw, 56px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px clamp(20px, 3vw, 40px); }
.item h3, .item dt { font: 400 1.25rem/1.22 var(--f-display); margin-bottom: 8px; text-wrap: wrap; }
.item p, .item dd { color: var(--ink-2); }
@media (max-width: 720px) { .grid-3 { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 620px) { .grid-2 { grid-template-columns: minmax(0, 1fr); } }
.note { font-size: 0.9375rem; color: var(--ink-2); max-width: 62ch; }

/* sample chart */
.figure { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: clamp(16px, 3vw, 28px); }
.fig-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 20px; margin-bottom: 14px; }
.fig-title { font: 600 0.9375rem/1.3 var(--f-body); }
.tag { font: 600 0.6875rem/1 var(--f-body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); border: 1px solid var(--line-2); border-radius: 999px; padding: 5px 10px; white-space: nowrap; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 20px; list-style: none; font-size: 0.8125rem; color: var(--ink-2); margin-bottom: 6px; }
.legend li { display: flex; align-items: center; gap: 8px; }
.legend i { display: block; width: 18px; height: 0; border-top: 2px solid var(--series-1); }
.legend .l2 i { border-top-color: var(--series-2); }
.legend .l3 i { border-top: 1px dashed var(--ink-2); }
.chart { position: relative; }
.chart svg { display: block; width: 100%; height: auto; touch-action: pan-y; }
.chart .chart-narrow { display: none; }
@media (max-width: 640px) {
  .chart .chart-wide { display: none; }
  .chart .chart-narrow { display: block; }
}
.c-grid { stroke: var(--line); stroke-width: 1; fill: none; }
.c-below { fill: var(--sunk); }
.c-thresh { stroke: var(--ink-2); stroke-width: 1; stroke-dasharray: 4 4; fill: none; }
.c-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.c-s1 { stroke: var(--series-1); }
.c-s2 { stroke: var(--series-2); }
.c-dot { stroke: var(--surface); stroke-width: 2; }
.c-dot.c-s1 { fill: var(--series-1); }
.c-dot.c-s2 { fill: var(--series-2); }
.c-txt { font: 400 11px var(--f-mono); fill: var(--ink-3); }
.c-lab { font: 500 12px var(--f-body); fill: var(--ink); }
.c-lab-2 { font: 400 11px var(--f-body); fill: var(--ink-2); }
.c-cross { stroke: var(--ink-3); stroke-width: 1; opacity: 0; }
.tip {
  position: absolute; top: 0; left: 0; pointer-events: none; min-width: 132px;
  background: var(--surface); color: var(--ink); border: 1px solid var(--line-2); border-radius: 4px;
  padding: 8px 10px; font-size: 0.75rem; line-height: 1.5; box-shadow: 0 6px 18px rgb(5 26 58 / 0.12);
}
.tip b { display: block; font-weight: 600; }
.tip span { display: flex; justify-content: space-between; gap: 14px; color: var(--ink-2); }
.tip span em { font: 400 0.75rem var(--f-mono); font-style: normal; color: var(--ink); }
.figcap { font-size: 0.875rem; color: var(--ink-2); margin-top: 14px; max-width: 70ch; }
.fig-data { margin-top: 12px; font-size: 0.8125rem; color: var(--ink-2); }
.fig-data summary { cursor: pointer; color: var(--link); width: fit-content; }
.table-scroll { overflow-x: auto; margin-top: 10px; }
.fig-data table { border-collapse: collapse; font-variant-numeric: tabular-nums; min-width: 420px; }
.fig-data th, .fig-data td { text-align: right; padding: 4px 10px; border-bottom: 1px solid var(--line); font-weight: 400; }
.fig-data th:first-child { text-align: left; padding-left: 0; }
.fig-data thead th { color: var(--ink-3); font-size: 0.75rem; }

/* about */
.about { display: grid; grid-template-columns: minmax(0, 250px) minmax(0, 1fr); gap: clamp(24px, 4vw, 52px); align-items: start; }
.portrait {
  aspect-ratio: 4 / 5; width: 100%; background: var(--sunk); border: 1px solid var(--line); border-radius: 3px;
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.portrait img { width: 100%; height: 100%; object-fit: cover; display: block; }
.monogram { font: italic 400 3.4rem/1 var(--f-display); letter-spacing: -0.02em; color: var(--ink); }
.monogram span { color: var(--sky); }
.portrait::after { content: ""; position: absolute; inset: 8px; border: 1px solid var(--line); border-radius: 1px; pointer-events: none; }
.about-text { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.about-lead { font: 400 clamp(1.45rem, 2.5vw, 1.95rem)/1.2 var(--f-display); letter-spacing: -0.005em; max-width: 24em; text-wrap: balance; }
.about-text p { color: var(--ink-2); max-width: 62ch; }
.about-text p.about-lead { color: var(--ink); }
.about-name { font-size: 0.875rem; color: var(--ink-3); padding-top: 14px; border-top: 1px solid var(--line); width: fit-content; padding-right: 40px; }
.about-name b { font-weight: 600; color: var(--ink-2); }
@media (max-width: 620px) {
  .about { grid-template-columns: minmax(0, 1fr); }
  .portrait { max-width: 132px; }
  .monogram { font-size: 2.6rem; }
}

/* insights list */
.posts { list-style: none; border-top: 1px solid var(--line); }
.posts li { padding-block: 22px; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.posts li:last-child { border-bottom: 0; padding-bottom: 0; }
.posts h3, .posts h2 { font-size: clamp(1.25rem, 2vw, 1.5rem); line-height: 1.2; }
.posts h3 a, .posts h2 a { color: var(--ink); text-decoration: none; }
.posts h3 a:hover, .posts h2 a:hover { color: var(--link); text-decoration: underline; text-decoration-thickness: 1px; }
.posts p { color: var(--ink-2); max-width: 62ch; }
.meta { font: 400 0.75rem/1.3 var(--f-mono); color: var(--ink-3); }

/* contact */
.email { font: 400 clamp(1.7rem, 4.6vw, 2.9rem)/1.1 var(--f-display); letter-spacing: -0.01em; user-select: all; -webkit-user-select: all; overflow-wrap: anywhere; }
.contact-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; font-size: 0.9375rem; }
.btn-quiet { font: inherit; color: var(--link); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding-block: 40px 56px; font-size: 0.8125rem; line-height: 1.55; color: var(--ink-3); display: grid; gap: 22px; }
.foot-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 28px; }
.foot-top .brand-mark { width: 96px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.foot-nav a { color: var(--ink-2); text-decoration: none; }
.foot-nav a:hover { text-decoration: underline; }
.legal { max-width: 84ch; }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.sister { color: var(--ink-3); text-decoration: none; }
.sister:hover { text-decoration: underline; }

/* article pages */
.article {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 3.3fr);
  column-gap: clamp(24px, 5vw, 72px); row-gap: 18px;
  padding-block: clamp(32px, 6vw, 72px) clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line);
}
.article-side { display: flex; flex-direction: column; gap: 8px; font-size: 0.875rem; color: var(--ink-3); }
.article-side a { color: var(--ink-2); }
.prose { min-width: 0; max-width: 66ch; }
.prose h1 { font-size: clamp(2rem, 4.4vw, 3rem); line-height: 1.08; letter-spacing: -0.012em; }
.prose .standfirst { font: 400 clamp(1.2rem, 2vw, 1.4rem)/1.4 var(--f-display); color: var(--ink-2); margin-top: 20px; }
.prose h2 { font-size: 1.45rem; line-height: 1.2; margin-top: 2.1em; }
.prose p { margin-top: 0.95em; }
.prose h2 + p { margin-top: 0.55em; }
.prose .example { border-left: 2px solid var(--sky); padding-left: 16px; color: var(--ink-2); }
.prose .endnote { margin-top: 2.4em; padding-top: 16px; border-top: 1px solid var(--line); font-size: 0.875rem; color: var(--ink-3); }
.more { margin-top: 2.2em; }
.more h2 { font: 600 0.75rem/1.3 var(--f-body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 6px; }
.more ul { list-style: none; }
.more li { padding-block: 8px; border-bottom: 1px solid var(--line); }
.more a { color: var(--ink); text-decoration: none; font: 400 1.15rem/1.3 var(--f-display); }
.more a:hover { color: var(--link); text-decoration: underline; text-decoration-thickness: 1px; }
@media (max-width: 860px) {
  .article { grid-template-columns: minmax(0, 1fr); }
  .article-side { flex-direction: row; flex-wrap: wrap; gap: 4px 18px; }
}
.page-head { padding-block: clamp(32px, 6vw, 72px) clamp(20px, 3vw, 36px); }
.page-head h1 { font-size: clamp(2rem, 4.4vw, 3rem); line-height: 1.08; letter-spacing: -0.012em; margin-top: 14px; }
.page-head p { color: var(--ink-2); max-width: 58ch; margin-top: 16px; font-size: 1.125rem; }

@media print {
  .theme-toggle, .nav, .corridor { display: none; }
}

/* two cities and the roadmap */
.city-k, .road-k { font: 400 0.75rem/1.3 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.cities .item { border-top: 1px solid var(--line); padding-top: 18px; }
.cities .item h3 { font-size: clamp(1.7rem, 3vw, 2.2rem); margin: 6px 0 10px; }
.road { margin-top: clamp(34px, 5vw, 56px); display: flex; flex-direction: column; gap: 16px; }
.road h3 { font: 400 1.25rem/1.22 var(--f-display); }
.road ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(20px, 3vw, 40px); }
.road li { border-top: 1px solid var(--line); padding-top: 14px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.road li:first-child { border-top-color: var(--sky); }
.road li p { color: var(--ink-2); }
.road li b { font-weight: 600; color: var(--ink); }
@media (max-width: 760px) { .road ol { grid-template-columns: minmax(0, 1fr); gap: 18px; } }

/* sign in, opportunity figures, credentials */
.nav a.signin { color: var(--ink); border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px; }
.nav a.signin:hover { border-color: var(--sky); text-decoration: none; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 30px clamp(18px, 3vw, 40px); margin: 0; }
.stats > div { border-top: 1px solid var(--sky); padding-top: 16px; min-width: 0; }
.stats dt { font: 400 clamp(1.9rem, 3.4vw, 2.7rem)/1.05 var(--f-display); letter-spacing: -0.01em; font-variant-numeric: tabular-nums; margin-bottom: 10px; text-wrap: balance; }
.stats dd { margin: 0; color: var(--ink-2); font-size: 0.9375rem; }
.stats .src { display: block; margin-top: 8px; font: 400 0.6875rem/1.3 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.sides { margin-top: clamp(34px, 5vw, 52px); }
.sides .item { border-top: 1px solid var(--line); padding-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.sides .item p:last-child { color: var(--ink); font: 400 1.15rem/1.4 var(--f-display); max-width: 30em; }
#india .note { margin-top: 26px; font-size: 0.8125rem; color: var(--ink-3); }
@media (max-width: 900px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .stats { grid-template-columns: minmax(0, 1fr); } }
.creds { list-style: none; margin: 4px 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); max-width: 62ch; }
.creds li { display: grid; grid-template-columns: minmax(0, 15em) minmax(0, 1fr); gap: 2px 18px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 0.9375rem; }
.creds b { font-weight: 600; color: var(--ink); }
.creds span { color: var(--ink-2); }
@media (max-width: 620px) { .creds li { grid-template-columns: minmax(0, 1fr); } }
.rooms { margin-top: 22px; font-size: 0.9375rem; color: var(--ink-2); }
.stats dt small { display: block; margin-top: 8px; font: 400 0.6875rem/1.3 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }

/* about: wide photograph above the text */
.about { display: flex; flex-direction: column; gap: clamp(26px, 3.4vw, 42px); }
.about-photo { margin: 0; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: var(--sunk); }
.about-photo img { display: block; width: 100%; height: auto; }
.about-lead { max-width: 26em; }
.creds li { grid-template-columns: minmax(0, 17em) minmax(0, 1fr); padding: 12px 0; }
@media (max-width: 620px) { .creds li { grid-template-columns: minmax(0, 1fr); } }

.legal a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }