/* =========================================================
   Tokens. Neutral canvas, white tiles, black ink, and four
   pastel tints that colour the numbers and icons. Brand
   logos keep their own official colours.
   ========================================================= */
:root {
  --bg: #f2f3f5;
  --card: #ffffff;
  --ink: #0f1115;
  --muted: #5b6270;
  --line: #e2e4e9;
  --chip: #f2f3f5;

  --mint: #dcf5e8;   --mint-ink: #0a6b47;
  --sky: #dbeeff;    --sky-ink: #0a58a6;
  --peach: #ffe8d4;  --peach-ink: #a8440a;
  --lav: #e8e4ff;    --lav-ink: #4a34c2;

  --font: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --max: 1180px;
  --radius: 24px;
  --shadow: 0 1px 2px rgba(15, 17, 21, 0.04), 0 14px 32px -22px rgba(15, 17, 21, 0.28);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c0f;
    --card: #16181d;
    --ink: #f1f2f4;
    --muted: #a1a7b3;
    --line: #272b34;
    --chip: #20232b;
    --mint: #0f2b20;   --mint-ink: #62e2ab;
    --sky: #0e2638;    --sky-ink: #77c6ff;
    --peach: #33210f;  --peach-ink: #ffb37c;
    --lav: #1f1b40;    --lav-ink: #b5a8ff;
    --shadow: none;
    --lowlum: #eceef2; /* stand-in for near-black logos on dark surfaces */
    --pale-langgraph: #7fc8ff;
    --logo-filter: brightness(1.3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0c0f;
  --card: #16181d;
  --ink: #f1f2f4;
  --muted: #a1a7b3;
  --line: #272b34;
  --chip: #20232b;
  --mint: #0f2b20;   --mint-ink: #62e2ab;
  --sky: #0e2638;    --sky-ink: #77c6ff;
  --peach: #33210f;  --peach-ink: #ffb37c;
  --lav: #1f1b40;    --lav-ink: #b5a8ff;
  --shadow: none;
  --lowlum: #eceef2;
  --pale-langgraph: #7fc8ff;
  --logo-filter: brightness(1.3);
  color-scheme: dark;
}

.t-mint  { --tint: var(--mint);  --tint-ink: var(--mint-ink); }
.t-sky   { --tint: var(--sky);   --tint-ink: var(--sky-ink); }
.t-peach { --tint: var(--peach); --tint-ink: var(--peach-ink); }
.t-lav   { --tint: var(--lav);   --tint-ink: var(--lav-ink); }

/* =========================================================
   Base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16.5px; scroll-behavior: smooth; scroll-padding-top: 96px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; letter-spacing: -0.025em; line-height: 1.15; }
h2, h3, h4 { text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; }
b { font-weight: 700; }
::selection { background: var(--ink); color: var(--bg); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 8px; }

.container { width: 100%; max-width: calc(var(--max) + 40px); margin-inline: auto; padding-inline: 20px; }
.nowrap { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  padding: 10px 16px; border-radius: 12px; background: var(--ink); color: var(--bg); font-weight: 700;
}
.skip-link:focus { top: 12px; }

/* Icons. .ico = line icons (Lucide), .logo = brand marks (Simple Icons). */
.ico, .logo { display: block; flex-shrink: 0; width: 1.15em; height: 1.15em; }
.ico { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.logo { filter: var(--logo-filter, none); }

.tile {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); box-shadow: var(--shadow);
}

/* =========================================================
   Buttons, chips, tags
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 22px;
  border: 1.5px solid transparent; border-radius: 999px;
  font-weight: 700; font-size: 0.97rem; white-space: nowrap;
  transition: transform 0.15s, background-color 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--sm { height: 42px; padding: 0 18px; font-size: 0.9rem; }
.btn--lg { height: 58px; padding: 0 26px; font-size: 1.02rem; }
.btn--icon { width: 50px; padding: 0; }
.btn--primary { background: var(--ink); color: var(--bg); }
.btn--ghost { background: var(--card); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--invert { background: var(--bg); color: var(--ink); }
.btn--outline { background: transparent; border-color: color-mix(in srgb, var(--bg) 35%, transparent); color: var(--bg); --mono: currentColor; }
.btn--outline:hover { border-color: var(--bg); background: color-mix(in srgb, var(--bg) 10%, transparent); }
.btn--outline .logo { filter: none; }

.icon-btn {
  display: grid; place-items: center; width: 42px; height: 42px;
  border: 1px solid var(--line); border-radius: 999px; background: transparent;
  transition: border-color 0.15s;
}
.icon-btn:hover { border-color: var(--ink); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 13px; border-radius: 999px; background: var(--chip);
  font-size: 0.88rem; font-weight: 600; line-height: 1.3;
}
.chip .logo { width: 16px; height: 16px; }

.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px; background: var(--chip);
  font-size: 0.9rem; font-weight: 600;
}
.tag .ico { width: 15px; height: 15px; }
.tag__dot { flex-shrink: 0; width: 8px; height: 8px; border-radius: 50%; background: #17b26a; box-shadow: 0 0 0 4px color-mix(in srgb, #17b26a 22%, transparent); }

/* =========================================================
   Nav: a floating pill
   ========================================================= */
.nav { position: sticky; top: 12px; z-index: 50; padding-inline: 20px; margin-top: 12px; }
.nav__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: var(--max); height: 62px; margin-inline: auto; padding: 0 10px 0 12px;
  border: 1px solid var(--line); border-radius: 999px;
  background: color-mix(in srgb, var(--card) 84%, transparent);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  transition: box-shadow 0.2s;
}
.nav.is-scrolled .nav__inner { box-shadow: 0 16px 36px -22px rgba(15, 17, 21, 0.45); }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.02rem; letter-spacing: -0.02em; }
.brand__mark {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--ink); color: var(--bg); font-size: 0.85rem; letter-spacing: 0;
}
.nav__links { display: flex; gap: 2px; }
.nav__links a {
  padding: 8px 14px; border-radius: 999px;
  font-size: 0.92rem; font-weight: 600; color: var(--muted);
  transition: color 0.15s, background-color 0.15s;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a.is-active { color: var(--ink); background: var(--chip); }
.nav__actions { display: flex; align-items: center; gap: 8px; }
.nav__menu { display: none; }
.nav__menu .icon-close, .nav__menu[aria-expanded="true"] .icon-open { display: none; }
.nav__menu[aria-expanded="true"] .icon-close { display: block; }

/* Controls that need JavaScript stay hidden without it */
html:not(.js) :is(#theme-toggle, #menu-toggle, #copy-email) { display: none; }

/* Theme toggle shows the theme you would switch to */
.icon-sun { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* =========================================================
   Hero bento
   ========================================================= */
.hero { padding-top: 24px; }
.bento { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }

.intro {
  grid-column: span 8; grid-row: span 2;
  display: flex; flex-direction: column; justify-content: center; gap: 26px;
  padding: clamp(28px, 4.5vw, 60px);
}
.intro__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.intro h1 { font-size: clamp(2.1rem, 4.3vw, 3.5rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.08; }
.h-logo {
  display: inline-grid; place-items: center; width: 0.82em; height: 0.82em; margin-right: 0.16em;
  border-radius: 0.24em; background: var(--chip); vertical-align: 0.15em;
}
.h-logo .logo { width: 60%; height: 60%; }
.intro__text { max-width: 56ch; font-size: 1.1rem; color: var(--muted); }
.intro__actions { display: flex; flex-wrap: wrap; gap: 10px; }

.metric {
  grid-column: span 4;
  display: flex; flex-direction: column; justify-content: space-between; gap: 22px;
  min-height: 200px; padding: 26px;
  border-color: transparent; background: var(--tint); box-shadow: none;
}
.metric--sm { grid-column: span 3; }
.metric__icon {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  background: var(--card); color: var(--tint-ink);
}
.metric__icon .ico, .metric__icon .logo { width: 21px; height: 21px; }
.metric__route { display: flex; align-items: center; gap: 10px; color: var(--tint-ink); }
.metric__route > .ico { width: 20px; height: 20px; }
.metric__body { display: grid; gap: 8px; }
.metric__num { font-size: clamp(2.3rem, 4.2vw, 3.5rem); font-weight: 800; letter-spacing: -0.045em; line-height: 0.95; color: var(--tint-ink); white-space: nowrap; }
.metric--sm .metric__num { font-size: clamp(2rem, 3.2vw, 2.7rem); }
.metric__label { font-weight: 600; line-height: 1.35; text-wrap: balance; }

.stack { grid-column: span 6; display: flex; flex-direction: column; justify-content: space-between; gap: 20px; padding: 26px; }
.stack__title { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.01em; }
.stack__grid { display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); gap: 10px; }
.stack__grid li {
  display: grid; place-items: center; aspect-ratio: 1; border-radius: 14px; background: var(--chip);
  transition: transform 0.15s;
}
.stack__grid li:hover { transform: translateY(-3px); }
.stack__grid .logo { width: 46%; height: 46%; }

/* =========================================================
   Sections
   ========================================================= */
.section { padding-top: clamp(64px, 8vw, 104px); }
.section__title { margin-bottom: 28px; font-size: clamp(1.8rem, 3.2vw, 2.5rem); font-weight: 800; letter-spacing: -0.035em; }

/* Experience */
.company { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 10px 24px; margin-bottom: 18px; }
.company--second { margin-top: 44px; }
.company h3 { font-size: 1.45rem; font-weight: 800; }
.company__role { margin-top: 4px; font-weight: 700; }
.company__note { margin-top: 2px; color: var(--muted); font-size: 0.95rem; }
.company__meta { display: flex; flex-wrap: wrap; gap: 8px; }
.company__meta span { padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); font-size: 0.88rem; font-weight: 600; }

.works { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.work { display: flex; flex-direction: column; gap: 16px; padding: 26px; transition: transform 0.2s, border-color 0.2s; }
.work:hover { transform: translateY(-3px); border-color: var(--tint-ink); }
.work__head { display: flex; align-items: center; gap: 14px; }
.work__icon {
  display: grid; place-items: center; flex-shrink: 0; width: 48px; height: 48px; border-radius: 15px;
  background: var(--tint); color: var(--tint-ink);
}
.work__icon .ico { width: 22px; height: 22px; }
.work h4 { font-size: 1.18rem; font-weight: 700; letter-spacing: -0.02em; }
.work > p { color: var(--muted); }
.work > p b { color: var(--ink); }
.work .chips { margin-top: auto; }

.intern { display: grid; gap: 20px; padding: 26px; }
.intern__list { display: grid; gap: 10px; }
.intern__list li { position: relative; padding-left: 20px; color: var(--muted); }
.intern__list li::before { content: ""; position: absolute; left: 0; top: 0.65em; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }
.intern__list b { color: var(--ink); }

/* Projects */
.projects { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.project { position: relative; display: flex; flex-direction: column; align-items: flex-start; gap: 16px; padding: clamp(26px, 3vw, 36px); transition: transform 0.2s, border-color 0.2s; }
.project:hover { transform: translateY(-3px); border-color: var(--ink); }
.project h3 a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); } /* the whole card is the link */
.project__more { display: inline-flex; align-items: center; gap: 8px; margin-top: auto; font-weight: 700; }
.project__more .ico { width: 18px; height: 18px; transition: transform 0.15s; }
.project:hover .project__more .ico { transform: translateX(4px); }
.project__kind { padding: 6px 14px; border-radius: 999px; background: var(--tint); color: var(--tint-ink); font-size: 0.86rem; font-weight: 700; }
.project h3 { font-size: clamp(1.7rem, 2.6vw, 2.1rem); font-weight: 800; letter-spacing: -0.035em; }
.project > p:not([class]) { color: var(--muted); }
.project__award {
  display: flex; align-items: center; gap: 14px; width: 100%; padding: 14px 16px;
  border-radius: 16px; background: var(--peach); font-weight: 500; line-height: 1.4;
}
.project__award-icon { display: grid; place-items: center; flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%; background: var(--card); color: var(--peach-ink); }
.project__award-icon .ico { width: 19px; height: 19px; }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.skill { grid-column: span 6; display: grid; align-content: start; gap: 18px; padding: 26px; }
.skill--wide { grid-column: span 12; }
.skill--mid { grid-column: span 8; }
.skill--narrow { grid-column: span 4; }
.skill h3 { display: flex; align-items: center; gap: 10px; font-size: 1.12rem; font-weight: 700; letter-spacing: -0.015em; }
.skill__dot { width: 12px; height: 12px; border-radius: 4px; background: var(--tint-ink); }

/* Credentials */
.creds { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.cred { display: flex; align-items: center; gap: 16px; padding: 22px 24px; }
.cred__icon { display: grid; place-items: center; flex-shrink: 0; width: 52px; height: 52px; border-radius: 16px; background: var(--tint, var(--chip)); color: var(--tint-ink, var(--ink)); }
.cred__icon .logo, .cred__icon .ico { width: 24px; height: 24px; }
.cred p { display: grid; gap: 2px; line-height: 1.35; }
.cred p span { color: var(--muted); font-size: 0.92rem; }

/* Contact */
.contact {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 28px clamp(28px, 5vw, 72px);
  padding: clamp(32px, 5.5vw, 68px); border-radius: calc(var(--radius) + 8px);
  background: var(--ink); color: var(--bg);
}
.contact h2 { font-size: clamp(2.4rem, 5.4vw, 4.2rem); font-weight: 800; letter-spacing: -0.045em; line-height: 1; }
.contact p { max-width: 40ch; margin-top: 16px; font-size: 1.08rem; color: color-mix(in srgb, var(--bg) 72%, transparent); }
.contact__actions { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; justify-items: start; }
.contact__row { display: flex; flex-wrap: wrap; gap: 10px; }
.contact :focus-visible { outline-color: var(--bg); }

/* Footer */
.footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding-block: 32px 40px; color: var(--muted); font-size: 0.92rem; }
.footer__top { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.footer__top:hover { color: var(--ink); }
.footer__top .ico { width: 16px; height: 16px; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 80;
  padding: 12px 20px; border-radius: 999px;
  background: var(--ink); color: var(--bg); font-weight: 700; font-size: 0.92rem;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--bg) 25%, transparent);
  opacity: 0; pointer-events: none; transform: translate(-50%, 12px);
  transition: opacity 0.2s, transform 0.2s;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1020px) {
  .intro { grid-column: span 12; grid-row: auto; }
  .metric, .metric--sm { grid-column: span 6; min-height: 180px; }
  .stack { grid-column: span 12; }
  .skill, .skill--mid, .skill--narrow { grid-column: span 12; }
  .creds { grid-template-columns: minmax(0, 1fr); }
  .contact { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .nav__menu { display: grid; }
  .nav__links {
    position: absolute; left: 20px; right: 20px; top: 70px;
    display: none; flex-direction: column; gap: 2px; padding: 10px;
    border: 1px solid var(--line); border-radius: var(--radius);
    background: var(--card); box-shadow: 0 24px 48px -24px rgba(15, 17, 21, 0.5);
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 12px 14px; font-size: 1.02rem; border-radius: 14px; }
}

@media (max-width: 760px) {
  .works, .projects { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 560px) {
  html { font-size: 16px; }
  :root { --radius: 20px; }
  .container, .nav { padding-inline: 14px; }
  .nav__links { left: 14px; right: 14px; }
  .brand__name { display: none; }
  .bento, .works, .projects, .skills, .creds { gap: 12px; }
  .metric, .metric--sm { min-height: 164px; padding: 18px; gap: 16px; }
  .metric__num, .metric--sm .metric__num { font-size: clamp(1.6rem, 7.6vw, 2.2rem); }
  .metric__label { font-size: 0.88rem; }
  .stack__grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .intro__actions .btn:not(.btn--icon) { flex: 1 1 auto; }
  .work, .intern, .skill, .stack { padding: 20px; }
  .contact__actions { justify-items: stretch; }
  .contact__row .btn { flex: 1 1 auto; }
  .btn--lg { height: 54px; padding: 0 16px; font-size: 0.93rem; }
}

@media (max-width: 380px) {
  .contact { padding: 24px 20px; }
  .contact .btn--lg {
    height: auto; min-height: 52px; padding: 10px 14px;
    font-size: 0.86rem; white-space: normal; overflow-wrap: anywhere;
  }
  .contact__row .btn { padding: 0 14px; }
}
@media (max-width: 340px) {
  .contact .btn--lg .ico { display: none; } /* keeps the address on one line */
}

/* =========================================================
   Project pages
   ========================================================= */
[hidden] { display: none !important; }
.nav__links a[aria-current="page"] { color: var(--ink); background: var(--chip); }

.page { padding-top: 24px; }
.back { display: inline-flex; align-items: center; gap: 8px; margin: 8px 0 18px; font-weight: 600; color: var(--muted); transition: color 0.15s; }
.back:hover { color: var(--ink); }
.back .ico { width: 18px; height: 18px; transition: transform 0.15s; }
.back:hover .ico { transform: translateX(-3px); }

.p-hero { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; padding: clamp(28px, 5vw, 60px); }
.p-hero h1 { font-size: clamp(2.6rem, 7vw, 5rem); font-weight: 800; letter-spacing: -0.045em; line-height: 1; }
.p-hero__lead { max-width: 60ch; font-size: 1.15rem; color: var(--muted); }

.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 16px; }
.fact {
  display: flex; flex-direction: column; justify-content: space-between; gap: 18px;
  min-height: 150px; padding: 24px; border-radius: var(--radius); background: var(--tint);
}
.fact__big { font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 800; letter-spacing: -0.045em; line-height: 1; color: var(--tint-ink); }
.fact__label { max-width: 30ch; font-weight: 600; line-height: 1.35; text-wrap: balance; }

.demo { margin-top: 16px; padding: 12px; overflow: hidden; }
.demo video { display: block; width: 100%; aspect-ratio: 16 / 9; border-radius: calc(var(--radius) - 8px); background: #000; }

/* The walkthrough */
.explainer { display: grid; gap: 26px; margin-top: 16px; padding: clamp(20px, 3.5vw, 40px); }
.explainer__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.explainer__head h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 800; letter-spacing: -0.035em; }
.explainer__controls { display: flex; gap: 8px; }
html:not(.js) .explainer__controls, html:not(.js) .caption { display: none; }
.icon-btn--solid { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.icon-btn--solid:hover { opacity: 0.85; }
.explainer:not(.is-playing) .icon-pause, .explainer.is-playing .icon-play { display: none; }

.flow { display: grid; gap: 20px; }
.lane__label { margin: 0 0 10px; font-size: 0.9rem; font-weight: 700; color: var(--muted); }
.lane__nodes { display: flex; align-items: stretch; gap: 6px; }
.lane__arrow { display: grid; place-items: center; flex: 0 0 auto; color: var(--muted); }
.lane__arrow .ico { width: 16px; height: 16px; }
.node {
  display: flex; flex: 1 1 0; flex-direction: column; gap: 12px; min-width: 0; padding: 14px;
  border: 1px solid var(--line); border-radius: 18px; background: var(--chip);
  transition: opacity 0.3s, background-color 0.3s, border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.node--wide { flex-direction: row; align-items: center; }
.node__tiles { display: flex; gap: 6px; }
.node__tile { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--card); color: var(--ink); }
.node__tile .logo, .node__tile .ico { width: 20px; height: 20px; }
.node__text { display: grid; gap: 2px; min-width: 0; line-height: 1.3; }
.node__text b { font-size: 0.98rem; font-weight: 700; }
.node__text small { font-size: 0.84rem; color: var(--muted); }
.is-live .node { opacity: 0.5; }
.is-live .node.is-active {
  opacity: 1; border-color: var(--ink); background: var(--card); transform: translateY(-3px);
  box-shadow: 0 14px 28px -18px rgba(15, 17, 21, 0.5);
}

.steps { display: grid; grid-template-columns: repeat(var(--n), minmax(0, 1fr)); gap: 8px; }
.step {
  position: relative; display: flex; flex-direction: column; align-items: flex-start; gap: 10px;
  width: 100%; height: 100%; padding: 12px 12px 17px; overflow: hidden;
  border: 1px solid var(--line); border-radius: 16px; background: transparent;
  color: var(--muted); text-align: left;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}
.step:hover { border-color: var(--ink); color: var(--ink); }
.step__num { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--chip); color: var(--ink); font-size: 0.8rem; font-weight: 700; }
.step__title { font-size: 0.92rem; font-weight: 700; line-height: 1.3; }
.step__text { display: block; font-size: 0.9rem; font-weight: 400; line-height: 1.45; }
.js .step__text { display: none; }
.step__bar { position: absolute; right: 0; bottom: 0; left: 0; height: 3px; }
.step__bar::after { content: ""; position: absolute; inset: 0; background: var(--ink); transform: scaleX(0); transform-origin: left; }
.step[aria-current="step"] { border-color: var(--ink); background: var(--chip); color: var(--ink); }
.step[aria-current="step"] .step__num { background: var(--ink); color: var(--bg); }
.is-playing .step[aria-current="step"] .step__bar::after { animation: step-fill var(--step-ms, 5500ms) linear forwards; }
@keyframes step-fill { to { transform: scaleX(1); } }

.caption { padding: 20px 22px; border-radius: 18px; background: var(--chip); }
.caption h3 { font-size: 1.2rem; font-weight: 700; }
.caption p { max-width: 70ch; margin-top: 6px; color: var(--muted); }

/* Detail cards, tools, next project */
.section-tight { padding-top: clamp(48px, 7vw, 80px); }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.feature { display: flex; flex-direction: column; gap: 10px; padding: 24px; }
.feature__icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 6px; border-radius: 15px; background: var(--tint); color: var(--tint-ink); }
.feature__icon .ico { width: 22px; height: 22px; }
.feature h3 { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em; }
.feature p { color: var(--muted); }
.built { padding: 24px; }

.pager {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  margin-top: clamp(48px, 7vw, 80px); padding: 26px 30px;
  transition: border-color 0.15s, transform 0.15s;
}
.pager:hover { border-color: var(--ink); transform: translateY(-3px); }
.pager__text { display: grid; gap: 2px; }
.pager__text small { font-weight: 600; color: var(--muted); }
.pager__text b { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1.1; }
.pager__text span { color: var(--muted); }
.pager__icon { display: grid; place-items: center; flex-shrink: 0; width: 52px; height: 52px; border-radius: 50%; background: var(--ink); color: var(--bg); transition: transform 0.15s; }
.pager:hover .pager__icon { transform: translateX(4px); }

@media (max-width: 1100px) {
  .steps { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 1020px) {
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  /* On small screens the flow becomes a two-column grid, and the caption moves up so it
     stays near the controls instead of far below a tall diagram. */
  .lane__nodes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .lane__arrow { display: none; }
  .node { gap: 8px; }
  .node--wide { grid-column: 1 / -1; }
  .caption { order: 1; }
  .flow { order: 2; }
  .steps { order: 3; }
}
@media (max-width: 760px) {
  .facts, .features { grid-template-columns: minmax(0, 1fr); }
  .fact { min-height: 0; }
}
@media (max-width: 640px) {
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .explainer { padding: 18px; }
  .pager { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}