/* ============================================================
   Learning Machines Summer Camp — Landing Page
   Design system inspired by generalintelligencecompany.com
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #14181a;
  background: #ffffff;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

:root {
  --cream: #ffffff;
  --ink: #14181a;
  --ink-soft: #2d3530;
  --card-dark: rgba(220, 228, 235, 0.18);   /* very light frosted glass — like GI */
  --border-light: rgba(255, 255, 255, 0.38);
  --text-white: #ffffff;
  --text-mute: rgba(255, 255, 255, 0.72);
  --pad-x: clamp(1.25rem, 4vw, 3.5rem);
  --max-w: 1200px;
  --section-y: clamp(4rem, 10vw, 8rem);
}

/* --- Typography --- */
.serif {
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.01em;
}

h1, h2, h3, h4 {
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.018em;
  line-height: 1.06;
}

h1 {
  font-size: clamp(3rem, 7vw, 6.25rem);
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  line-height: 1.2;
}

p {
  font-family: 'Space Mono', 'DM Sans', monospace;
  font-size: 0.875rem;
  line-height: 1.78;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

/* ============================================================
   NAV PILL — persistent. Apply Now button stays BLACK throughout.
   The rest of the pill (links, bg, border) flips per section.
   ============================================================ */
.nav-pill {
  position: fixed;
  top: 1.1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.3rem 0.3rem 0.3rem 0.8rem;
  border-radius: 14px;
  transition:
    background 0.4s ease,
    border-color 0.4s ease,
    color 0.4s ease,
    box-shadow 0.4s ease;
}

body[data-nav-color="light"] .nav-pill {
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: #ffffff;           /* white text — readable over dark Toronto bg (day + night) */
  box-shadow:
    0 8px 30px rgba(20, 40, 60, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

body[data-nav-color="dark"] .nav-pill {
  background: rgba(20, 25, 22, 0.45);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  box-shadow:
    0 8px 30px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

body[data-nav-color="cream"] .nav-pill {
  background: rgba(255, 252, 245, 0.78);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #14181a;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

/* Logo: clear/transparent so it blends with the pill */
.nav-pill__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: transparent;
  flex-shrink: 0;
  color: inherit;
}

.nav-pill__logo svg {
  width: 18px;
  height: 18px;
  color: inherit;
}

.nav-pill__links {
  display: flex;
  gap: 1.15rem;
  font-size: 0.85rem;
  font-weight: 400;
  color: inherit;
}

.nav-pill__links a {
  position: relative;
  padding: 0.25rem 0;
  color: inherit;
  transition: opacity 0.2s;
}

.nav-pill__links a:hover {
  opacity: 0.65;
}

/* Apply Now CTA — ALWAYS black with white text, like GI */
.nav-pill__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.4rem 0.4rem 0.85rem;
  background: #14181a;
  color: #ffffff;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 400;
  white-space: nowrap;
  transition: background 0.25s;
}

.nav-pill__cta:hover {
  background: #000;
}

.nav-pill__cta-icon {
  display: inline-flex;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.nav-pill__cta-icon svg {
  animation: arrow-nudge 1.8s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.nav-pill__cta:hover .nav-pill__cta-icon svg {
  animation-play-state: paused;
  transform: translateX(3px);
}

@keyframes arrow-nudge {
  0%, 100%   { transform: translateX(0); }
  45%        { transform: translateX(3px); }
  55%        { transform: translateX(3px); }
}

/* Top-right time/location indicator */
.top-meta {
  position: fixed;
  top: 1.95rem;
  right: 2rem;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
  transition: color 0.4s ease, text-shadow 0.4s ease;
}

body[data-nav-color="cream"] .top-meta {
  color: rgba(20, 25, 22, 0.7);
  text-shadow: none;
}

.top-meta__dot {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1px solid currentColor;
  border-radius: 50%;
  position: relative;
}

.top-meta__dot::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.85;
  animation: dot-pulse 2.4s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50%       { opacity: 0.45; transform: scale(0.7); }
}

@media (max-width: 720px) {
  .nav-pill {
    gap: 0.75rem;
    padding: 0.4rem 0.4rem 0.4rem 0.75rem;
  }
  .nav-pill__links {
    gap: 0.85rem;
    font-size: 0.85rem;
  }
  .nav-pill__cta {
    padding: 0.45rem 0.45rem 0.45rem 0.85rem;
    font-size: 0.85rem;
  }
  .top-meta {
    display: none;
  }
}

/* ============================================================
   HERO — taller than viewport. At scroll=0 the user sees only
   the title and the painting. The card (bottom-left) and the
   AI-native tag (bottom-right) are positioned BELOW the viewport
   and slide into view as the user scrolls — matching GI's
   bottom-of-painting reveal pattern.
   ============================================================ */
.hero {
  position: relative;
  min-height: 145vh;       /* GI-style: card below fold at scroll=0, reveals on scroll */
  overflow: clip;          /* clip (not hidden) keeps sticky children working */
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  /* Image is taller than the bg div so we have vertical room to pan. */
  background-image: url('assets/hero-toronto.png');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center 25%;
  will-change: background-position, transform;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 22%, rgba(0, 0, 0, 0.2) 0%, transparent 55%),
    linear-gradient(
      180deg,
      rgba(0, 0, 0, 0.18) 0%,
      rgba(0, 0, 0, 0.02) 28%,
      rgba(0, 0, 0, 0.02) 60%,
      rgba(0, 0, 0, 0.22) 100%
    );
}

/* Night variant — slightly cooler/darker overlay on the night image */
.hero__bg--night::after {
  background:
    radial-gradient(ellipse at 50% 15%, rgba(10, 20, 50, 0.25) 0%, transparent 55%),
    linear-gradient(
      180deg,
      rgba(5, 10, 30, 0.32) 0%,
      rgba(5, 10, 30, 0.05) 30%,
      rgba(5, 10, 30, 0.05) 65%,
      rgba(5, 10, 30, 0.3) 100%
    );
}

/* Film grain overlay — subtle retro texture on hero */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px;
}

.hero__title {
  position: absolute;
  top: 17vh;
  left: 0;
  right: 0;
  text-align: center;
  padding: 0 var(--pad-x);
  color: #fff;
  font-feature-settings: 'liga' on, 'dlig' on;
  z-index: 2;
}

.hero__title-pixel {
  color: #ffffff;
  text-shadow:
    0 1px 3px rgba(0, 0, 0, 0.45),
    0 3px 18px rgba(0, 0, 0, 0.5),
    0 0 50px rgba(0, 0, 0, 0.35);
}

.hero__title h1 {
  font-size: clamp(1.75rem, 4.5vw, 3.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 400;
}

/* Bottom strip — card on the left, tag on the right, stats below.
   JS starts this as position:fixed at viewport bottom (visible from
   scroll=0). When the hero is about to exit, JS switches it to
   position:absolute; bottom:5vh — it "settles" there and scrolls
   away naturally with the section. No visual jump: the two positions
   are identical at the transition threshold. */
.hero__bottom {
  position: absolute;      /* fallback / reduced-motion / JS off */
  bottom: 5vh;
  left: 0;
  right: 0;
  padding: 0 var(--pad-x);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  z-index: 10;
}

.hero__row {
  display: flex;
  justify-content: flex-start;   /* card anchors left; tag pushed right */
  align-items: flex-end;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero__card-wrap {
  flex: 0 1 auto;
  /* Nudge slightly left of the container edge for visual alignment */
  margin-left: -0.5rem;
}

.hero__card {
  max-width: 450px;
  padding: 1.75rem 2rem;
  background: rgba(255, 255, 255, 0.18);   /* up from 0.1 — more readable */
  backdrop-filter: blur(36px) saturate(160%) brightness(1.08);
  -webkit-backdrop-filter: blur(36px) saturate(160%) brightness(1.08);
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 20px;
  color: var(--text-white);
  box-shadow:
    0 24px 64px -20px rgba(0, 0, 0, 0.38),
    inset 0 1px 0 rgba(255, 255, 255, 0.62),
    inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

.hero__card h2 {
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  font-weight: 400;
  margin-bottom: 0.85rem;
  color: #fff;
}

.hero__card p {
  font-family: 'Space Mono', monospace;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem;
  line-height: 1.7;
  letter-spacing: -0.01em;
}

/* Simple text + arrow, like the user's mockup. The arrow nudges right on hover. */
.hero__card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  padding-bottom: 4px;
  transition: gap 0.25s, border-color 0.25s;
}

.hero__card-cta:hover {
  gap: 0.85rem;
  border-color: #fff;
}

.hero__card-cta svg {
  animation: arrow-nudge 1.8s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.hero__card-cta:hover svg {
  animation-play-state: paused;
  transform: translateX(4px);
  transition: transform 0.25s ease;
}

/* Stats line — under the card, never absolute */
.hero__stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding-top: 0.25rem;
}

.hero__stat {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.88);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
}

.hero__stat-icon {
  width: 13px;
  height: 13px;
  opacity: 0.8;
  flex-shrink: 0;
}

/* Dollar sign beside "Free" stat */
.hero__stat-dollar {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1rem;
  line-height: 1;
  opacity: 0.88;
  flex-shrink: 0;
  width: 13px;
  text-align: center;
  display: inline-block;
}

/* Tag — absolutely anchored at bottom-right of the 145vh hero.
   Always stays at its resting position (bottom: 5vh, right edge).
   Hidden at scroll=0 since hero is taller than the viewport.
   Appears naturally as the user scrolls and the hero bottom enters
   the viewport — the card (fixed) drifts down to meet it here. */
.hero__tag {
  position: absolute;
  bottom: 5vh;
  right: var(--pad-x);
  width: clamp(260px, 28vw, 340px);
  text-align: right;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.hero__tag-icon {
  display: inline-flex;
  width: 28px;
  height: 28px;
  margin-bottom: 0.4rem;
  opacity: 0.85;
  color: #fff;
}

.hero__tag-tagline {
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: clamp(1.1rem, 1.8vw, 1.45rem);
  line-height: 1.2;
  color: #fff;
  font-weight: 400;
  margin-bottom: 0.65rem;
}

.hero__tag-sub {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: -0.01em;
}

@media (max-width: 720px) {
  .hero {
    min-height: 145vh;
  }
  .hero__bottom {
    bottom: 3vh;
  }
  .hero__row {
    flex-direction: column;
    align-items: stretch;
  }
  .hero__tag {
    width: calc(100% - var(--pad-x) * 2);
    right: var(--pad-x);
    text-align: left;
    bottom: 3vh;
  }
  .hero__title {
    top: 16vh;
  }
}

/* ============================================================
   ORIGIN STORY — three editorial cards, GI-styled
   ============================================================ */
.origin {
  background: var(--cream);
  padding: var(--section-y) 0;
  text-align: center;
  position: relative;
  border-top: 1px solid rgba(20, 24, 26, 0.07);
}

.origin h2 {
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.origin__lede {
  max-width: 600px;
  margin: 0 auto clamp(2.5rem, 5vw, 4rem);
  font-family: 'Space Mono', monospace;
  font-style: italic;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.78;
  letter-spacing: -0.01em;
}

.origin__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  text-align: left;
}

.origin__card {
  position: relative;
  padding: 2.25rem 1.85rem;
  background: rgba(248, 249, 251, 0.9);
  border: 1px solid rgba(20, 24, 26, 0.08);
  border-radius: 18px;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}

.origin__card::before {
  /* a soft top-corner highlight to mimic GI's painterly cards */
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(20, 24, 26, 0.12),
    transparent
  );
}

.origin__card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 1);
  border-color: rgba(20, 24, 26, 0.14);
}

.origin__card-year {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  opacity: 0.55;
  margin-bottom: 1.5rem;
}

.origin__card h3 {
  font-family: 'Instrument Serif', 'Newsreader', serif;
  font-size: 1.45rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.origin__card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-soft);
  opacity: 0.8;
}

/* Accent "Your summer" card — glassy/painterly, mirrors the hero card vibe */
.origin__card--accent {
  background:
    linear-gradient(155deg, rgba(20, 35, 28, 0.92) 0%, rgba(10, 14, 12, 0.98) 100%);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow:
    0 30px 60px -25px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
}

.origin__card--accent::before {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.32),
    transparent
  );
}

.origin__card--accent:hover {
  background:
    linear-gradient(155deg, rgba(28, 48, 38, 0.95) 0%, rgba(14, 20, 16, 1) 100%);
  border-color: rgba(255, 255, 255, 0.22);
}

.origin__card--accent .origin__card-year {
  color: rgba(255, 255, 255, 0.55);
  opacity: 1;
}

.origin__card--accent h3 {
  color: #fff;
}

.origin__card--accent p {
  color: rgba(255, 255, 255, 0.78);
  opacity: 1;
}

@media (max-width: 860px) {
  .origin__cards {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   DARK SECTIONS — vertical & horizontal auto-scroll
   ============================================================ */
.dark-section {
  background: #0a0e0c;
  color: #fff;
  padding: var(--section-y) 0;
  position: relative;
  overflow: hidden;
}

.dark-section .container {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.dark-section__text {
  position: sticky;
  top: 8rem;
  align-self: start;
  padding: 1rem 0;
}

.dark-section__text h2 {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  margin-bottom: 1.5rem;
  color: #fff;
}

.dark-section__text p {
  font-family: 'Space Mono', monospace;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 1.25rem;
  font-size: 0.82rem;
  line-height: 1.78;
  letter-spacing: -0.01em;
}

.dark-section__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background: rgba(120, 220, 130, 0.12);
  border: 1px solid rgba(120, 220, 130, 0.28);
  color: #8ee69a;
  border-radius: 100px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 1rem;
}

.dark-section__tag::before {
  content: '●';
  font-size: 0.5rem;
}

/* Vertical marquee (Your story begins) */
.story-column {
  position: relative;
  height: clamp(440px, 60vh, 680px);
  overflow: hidden;
  mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
}

.story-column__track {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  animation: scrollY 28s linear infinite;
  will-change: transform;
}

@keyframes scrollY {
  from { transform: translateY(0); }
  to   { transform: translateY(-50%); }
}

.story-card {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 14px;
  overflow: hidden;
  background: #1a1f1b;
}

.story-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: ken-burns 9s ease-in-out infinite alternate;
  transform-origin: center center;
}

/* Alternate zoom direction on every other card */
.story-card:nth-child(even) img {
  animation-name: ken-burns-reverse;
  animation-duration: 11s;
}

@keyframes ken-burns {
  from { transform: scale(1.0) translate(0, 0); }
  to   { transform: scale(1.07) translate(-1.5%, 1%); }
}

@keyframes ken-burns-reverse {
  from { transform: scale(1.07) translate(1%, -1%); }
  to   { transform: scale(1.0) translate(0, 0); }
}

.story-card__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.85rem 1rem;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.85));
  font-size: 0.82rem;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.92);
}

/* Horizontal marquee (Work on ideas) */
.dark-section--horizontal-marquee {
  padding-bottom: 0;
}

.dark-section--horizontal-marquee .container {
  display: block;
  text-align: center;
}

.dark-section--horizontal-marquee .dark-section__text {
  position: static;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 0 0 clamp(2rem, 4vw, 3rem);
}

.idea-row {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  overflow: hidden;
  padding-bottom: var(--section-y);
  mask-image: linear-gradient(90deg, transparent 0%, #000 6%, #000 94%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 6%, #000 94%, transparent 100%);
}

.idea-row__track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: scrollX 35s linear infinite;
  will-change: transform;
}

.idea-row .story-card {
  flex: 0 0 280px;
  aspect-ratio: 4 / 5;
}

@keyframes scrollX {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@media (max-width: 860px) {
  .dark-section .container {
    grid-template-columns: 1fr;
  }
  .dark-section__text {
    position: static;
  }
  .story-column {
    height: 460px;
  }
}

/* ============================================================
   CADENCE — no FAQ link, simpler subhead
   ============================================================ */
.cadence {
  background: #0a0e0c;
  color: #fff;
  padding: var(--section-y) 0 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cadence__intro {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.cadence__intro .eyebrow {
  margin-bottom: 1.25rem;
}

.cadence__intro h2 {
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
  margin-bottom: 1.5rem;
  color: #fff;
}

.cadence__intro p {
  font-family: 'Space Mono', monospace;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 1rem;
  font-size: 0.82rem;
  line-height: 1.78;
  letter-spacing: -0.01em;
}

.cadence__not {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.1rem;
  border: 1px dashed rgba(255, 255, 255, 0.22);
  border-radius: 100px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 0.02em;
}

.cadence__not strong {
  font-weight: 600;
  color: #fff;
}

.weeks-strip {
  margin-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: #0a0e0c;
  overflow: hidden;
  position: relative;
}

.weeks-strip__track {
  display: flex;
  width: max-content;
  animation: scrollX 32s linear infinite;
}

.weeks-strip__item {
  flex: 0 0 auto;
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: #fff;
  white-space: nowrap;
}

.weeks-strip__item-num {
  font-size: 0.78rem;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  font-weight: 500;
}

/* ============================================================
   ESSAY — Altalogy-style reading section
   Paragraphs start dim; brighten when in viewport; dim when past.
   ============================================================ */
.essay {
  background: #ffffff;
  padding: var(--section-y) 0;
  border-top: 1px solid rgba(20, 24, 26, 0.07);
}

.essay__inner {
  max-width: 680px;
  margin: 0 auto;
}

.essay__inner .eyebrow {
  display: block;
  color: var(--ink-soft);
  opacity: 0.55;
  margin-bottom: 2.5rem;
}

.essay__body {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

/* Default: dimmed. JS adds .is-reading / .is-read via IntersectionObserver */
.essay__p {
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: clamp(1.2rem, 2.1vw, 1.65rem);
  line-height: 1.48;
  letter-spacing: -0.018em;
  color: var(--ink);
  opacity: 0.28;
  transition: opacity 0.45s ease;
  will-change: opacity;
  margin: 0;
}

.essay__p.is-reading {
  opacity: 1;
}

.essay__p.is-read {
  opacity: 0.42;
}

@media (prefers-reduced-motion: reduce) {
  .essay__p {
    opacity: 1 !important;
    transition: none !important;
  }
}

/* Handwritten signature at the end of the essay */
.essay__signature {
  font-family: 'Homemade Apple', 'Caveat', 'Brush Script MT', cursive;
  font-size: clamp(1.05rem, 1.8vw, 1.4rem);
  font-weight: 400;
  color: var(--ink);
  margin-top: 1.25rem;
  line-height: 1.4;
  letter-spacing: 0.005em;
  opacity: 0.85;
  transform: rotate(-1.5deg);
  transform-origin: left center;
  display: inline-block;
}

/* ============================================================
   FAQ — GI careers-page white style
   ============================================================ */
.faq {
  background: #ffffff;
  padding: var(--section-y) 0;
  color: var(--ink);
  border-top: 1px solid rgba(20, 24, 26, 0.07);
}

.faq__inner {
  max-width: 860px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid rgba(20, 24, 26, 0.1);
  border-radius: 20px;
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow:
    0 1px 3px rgba(20, 24, 26, 0.04),
    0 8px 30px rgba(20, 24, 26, 0.05);
}

.faq__eyebrow {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  opacity: 0.7;
  margin-bottom: 0.75rem;
  display: block;
  line-height: 0;
}

.faq__inner h2 {
  margin-bottom: 2rem;
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
}

.faq__list {
  list-style: none;
}

.faq__item {
  border-top: 1px solid rgba(20, 24, 26, 0.08);
}

.faq__item:last-child {
  border-bottom: 1px solid rgba(20, 24, 26, 0.08);
}

.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.15rem 0;
  font-size: 0.98rem;
  text-align: left;
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  transition: color 0.2s;
}

.faq__q:hover {
  color: var(--ink);
  opacity: 0.72;
}

.faq__q-mark {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(20, 24, 26, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 300;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.2s;
}

.faq__item[aria-expanded="true"] .faq__q-mark {
  transform: rotate(45deg);
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: rgba(20, 24, 26, 0.65);
  line-height: 1.7;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.96rem;
}

.faq__item[aria-expanded="true"] .faq__a {
  max-height: 500px;
  padding-bottom: 1.35rem;
  padding-right: 3rem;
}

/* ============================================================
   CLOSING — GI-style: centered title + inline pill CTA
   ============================================================ */
.closing {
  background: #ffffff;
  padding: clamp(4rem, 9vw, 7rem) 0;
  color: var(--ink);
  border-top: 1px solid rgba(20, 24, 26, 0.07);
}

.closing__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  flex-wrap: wrap;
}

/* Single-column layout used in the new closing */
.closing__col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.closing__col .closing__inline {
  margin-top: 1.75rem;
}

.closing__left {
  flex: 1 1 460px;
  text-align: left;
}

.closing__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  opacity: 0.65;
  color: var(--ink);
}

.closing h2 {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  max-width: 560px;
  margin: 0 0 0.85rem;
  color: var(--ink);
  letter-spacing: -0.018em;
  line-height: 1.1;
  text-align: left;
}

.closing__sub {
  color: var(--ink-soft);
  font-size: 0.98rem;
  opacity: 0.78;
  margin: 0;
  text-align: left;
}

/* Inline newsletter in closing */
.closing__newsletter {
  display: inline-flex;
  align-items: center;
  margin-top: 1.5rem;
  padding: 0.3rem 0.3rem 0.3rem 0.9rem;
  border: 1px solid rgba(20, 24, 26, 0.15);
  border-radius: 100px;
  background: transparent;
  transition: border-color 0.2s, background 0.2s;
}

.closing__newsletter:focus-within {
  border-color: rgba(20, 24, 26, 0.38);
  background: rgba(0, 0, 0, 0.02);
}

.closing__newsletter input {
  border: 0;
  background: transparent;
  outline: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  color: var(--ink);
  width: 220px;
  min-width: 0;
  padding: 0.35rem 0.5rem 0.35rem 0;
}

.closing__newsletter input::placeholder {
  color: rgba(20, 24, 26, 0.42);
}

.closing__newsletter button {
  display: inline-flex;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: background 0.2s;
}

.closing__newsletter button:hover { background: #000; }

.closing__newsletter button svg {
  transition: transform 0.25s;
}

.closing__newsletter button:hover svg {
  transform: translateX(2px);
}

.closing__right {
  flex: 0 0 auto;
  align-self: center;
}

.closing__inline {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.15rem;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
  transition: gap 0.25s, opacity 0.25s;
}

.closing__inline:hover {
  gap: 0.95rem;
  opacity: 0.7;
}

.closing__inline-arrow {
  display: inline-flex;
  align-items: center;
}

.closing__inline-arrow svg {
  animation: arrow-nudge 1.8s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.closing__inline:hover .closing__inline-arrow svg {
  animation-play-state: paused;
  transform: translateX(4px);
  transition: transform 0.25s ease;
}

@media (max-width: 720px) {
  .closing__row {
    align-items: flex-start;
  }
  .closing__right {
    align-self: flex-start;
  }
}

/* ============================================================
   FOOTER — clean two-column row + double divider + full-width art
   ============================================================ */
.foot {
  background: var(--cream);
  padding: 0;
}

.foot__row {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x) 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.foot__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--ink-soft);
}

.foot__nav a {
  transition: opacity 0.2s;
}

.foot__nav a:hover {
  opacity: 0.55;
}

.foot__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Real email-capture pill: <input> + submit button.
   Border on the wrapping form, transparent input, dark circular submit. */
.foot__signup {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.3rem 0.3rem 0.95rem;
  border: 1px solid rgba(20, 24, 26, 0.18);
  border-radius: 100px;
  background: transparent;
  transition: border-color 0.2s, background 0.2s;
}

.foot__signup:focus-within {
  border-color: rgba(20, 24, 26, 0.45);
  background: rgba(255, 255, 255, 0.7);
}

.foot__signup input {
  border: 0;
  background: transparent;
  outline: none;
  padding: 0.4rem 0.5rem 0.4rem 0;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--ink);
  width: 200px;
  min-width: 0;
}

.foot__signup input::placeholder {
  color: rgba(20, 24, 26, 0.45);
}

.foot__signup button {
  display: inline-flex;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.foot__signup button:hover {
  background: #000;
}

.foot__signup button svg {
  transition: transform 0.3s ease;
}

.foot__signup button:hover svg {
  transform: translateX(2px);
}

.foot__signup--ok {
  pointer-events: none;
}

.foot__signup--ok input {
  color: rgba(20, 24, 26, 0.55);
}

.foot__social {
  display: flex;
  gap: 0.5rem;
}

.foot__social a {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(20, 24, 26, 0.18);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.foot__social a:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

/* Subtle double-line divider just above the footer art (GI-style). */
.foot__divider {
  width: 100%;
  height: 7px;
  background:
    linear-gradient(to bottom,
      rgba(20, 24, 26, 0.1) 0%,
      rgba(20, 24, 26, 0.1) 1px,
      transparent 1px,
      transparent 3px,
      rgba(20, 24, 26, 0.1) 3px,
      rgba(20, 24, 26, 0.1) 4px,
      transparent 4px
    );
  margin: 0;
}

/* Pixel-art Toronto park scene — FULL VIEWPORT WIDTH */
.foot__scene {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  aspect-ratio: 1920 / 720;
  overflow: hidden;
  background-image: url('assets/footer-toronto.png');
  background-size: cover;
  background-position: center;
}

.foot__scene::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.35) 100%);
}

.foot__copyline {
  position: absolute;
  bottom: 1.25rem;
  left: clamp(1.5rem, 4vw, 3.5rem);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  z-index: 2;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.foot__credit {
  position: absolute;
  bottom: 1.25rem;
  right: clamp(1.5rem, 4vw, 3.5rem);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  z-index: 2;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.foot__credit a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============================================================
   SUB-PAGES
   ============================================================ */
.subpage {
  background: var(--cream);
  min-height: 100vh;
  padding: 9rem var(--pad-x) 6rem;
  color: var(--ink);
}

.subpage__inner {
  max-width: 760px;
  margin: 0 auto;
}

.subpage__inner .eyebrow {
  color: var(--ink-soft);
  opacity: 0.65;
  margin-bottom: 1rem;
}

.subpage__inner h1 {
  margin-bottom: 2rem;
  color: var(--ink);
}

.subpage__inner h2 {
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-size: 1.6rem;
}

.subpage__inner p,
.subpage__inner li {
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

.subpage__inner p {
  margin-bottom: 1.25rem;
}

.subpage__inner ul {
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;
}

.subpage__inner li {
  margin-bottom: 0.5rem;
}

.subpage__inner a {
  color: var(--ink);
  border-bottom: 1px solid rgba(0, 0, 0, 0.4);
  transition: opacity 0.2s;
}

.subpage__inner a:hover {
  opacity: 0.6;
}

.writing-list {
  list-style: none;
  padding: 0 !important;
  margin: 2rem 0 !important;
}

.writing-list li {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding: 1.25rem 0;
}

.writing-list li:last-child {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.writing-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  border: none !important;
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: 1.4rem;
}

.writing-list time {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--ink-soft);
  opacity: 0.6;
  white-space: nowrap;
}

/* ============================================================
   UTILITY
   ============================================================ */
section[id] {
  scroll-margin-top: 6rem;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.word-reveal {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  filter: blur(8px);
  animation: wordIn 0.9s cubic-bezier(0.2, 0.65, 0.25, 1) forwards;
}

@keyframes wordIn {
  to {
    opacity: 1;
    transform: none;
    filter: blur(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .word-reveal,
  .story-column__track,
  .idea-row__track,
  .weeks-strip__track {
    animation: none !important;
    opacity: 1;
    transform: none;
    filter: none;
  }
}

@media print {
  .nav-pill, .top-meta, .foot__scene { display: none; }
}

/* ============================================================
   SOCIAL PROOF BAR
   ============================================================ */
/* ============================================================
   MENTOR LOGOS — "Access to mentors and alumni from"
   ============================================================ */

.mentor-logos {
  background: #fff;
  padding: clamp(3rem, 6vw, 5rem) var(--pad-x);
  text-align: center;
  border-bottom: 1px solid rgba(20,24,26,0.07);
}

.mentor-logos__inner {
  max-width: 600px;
  margin: 0 auto;
}

.mentor-logos__label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(20,24,26,0.4);
  margin-bottom: 2.75rem;
}

.mentor-logos__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  row-gap: 2.25rem;
  column-gap: 1.5rem;
}

.mentor-logos__item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  justify-content: flex-start;
  padding-left: 1rem;
}

.mentor-logos__icon {
  flex-shrink: 0;
}

.mentor-logos__name {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: #14181a;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.mentor-logos__wordmark {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #14181a;
  letter-spacing: -0.02em;
}

.mentor-logos__wordmark--spacex {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

@media (max-width: 520px) {
  .mentor-logos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .mentor-logos__item {
    padding-left: 0.5rem;
  }
}

/* ============================================================
   DARK ALUMNI — embedded in "Your story begins" dark section
   ============================================================ */

.dark-alumni {
  margin-top: 2.25rem;
}

.dark-alumni__label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.22);
  margin-bottom: 1.25rem;
}

.dark-alumni__grid {
  display: grid;
  grid-template-columns: repeat(3, auto);
  justify-content: start;
  row-gap: 1rem;
  column-gap: 2rem;
}

.dark-alumni__item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.dark-alumni__item svg {
  flex-shrink: 0;
}

.dark-alumni__item span {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255,255,255,0.72);
  white-space: nowrap;
}

.dark-alumni__wordmark {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: rgba(255,255,255,0.72);
  letter-spacing: -0.02em;
}

/* a16z gold wordmark (legacy, no longer used as badge) */
.dark-alumni__a16z {
  display: none;
}

/* ============================================================
   DEMOS PAGE
   ============================================================ */

.demos-hero {
  padding: clamp(4rem, 10vw, 7rem) var(--pad-x) 2rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.demos-hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin: 0.5rem 0 1rem;
  line-height: 1.08;
}

.demos-hero p {
  color: var(--ink-soft);
  max-width: 44ch;
  font-size: 1.05rem;
}

.demos-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 var(--pad-x) 2.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.demos-filter {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.35em 0.9em;
  border-radius: 99px;
  border: 1px solid rgba(20,24,26,0.18);
  background: transparent;
  color: rgba(20,24,26,0.55);
  cursor: pointer;
  transition: all 0.15s ease;
}

.demos-filter:hover,
.demos-filter.is-active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.demos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 2rem;
  padding: 0 var(--pad-x) clamp(4rem, 8vw, 6rem);
  max-width: var(--max-w);
  margin: 0 auto;
}

.demo-card__video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #e8eaec;
  border-radius: 10px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.demo-card__video-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(20,24,26,0.25);
}

.demo-card__video-placeholder svg {
  opacity: 0.5;
}

.demo-card__video-placeholder span {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-card__tag {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(20,24,26,0.45);
  background: rgba(20,24,26,0.06);
  padding: 0.2em 0.55em;
  border-radius: 3px;
  margin-bottom: 0.6rem;
}

.demo-card h3 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
  color: var(--ink);
}

.demo-card__creator {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  color: rgba(20,24,26,0.45);
  margin-bottom: 0.5rem;
}

.demo-card__desc {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  color: rgba(20,24,26,0.6);
  line-height: 1.5;
}

.demos-back {
  padding: 0 var(--pad-x) 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

@media (max-width: 860px) {
  .demos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .demos-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   PROOF BAR (legacy — kept for reference)
   ============================================================ */

.proof-bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.85rem var(--pad-x);
  background: var(--ink);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.proof-bar__label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: 1.25rem;
  border-right: 1px solid rgba(255,255,255,0.12);
}

.proof-bar__track-wrap {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.proof-bar__track-wrap::before,
.proof-bar__track-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 4rem;
  z-index: 2;
  pointer-events: none;
}
.proof-bar__track-wrap::before {
  left: 0;
  background: linear-gradient(to right, var(--ink), transparent);
}
.proof-bar__track-wrap::after {
  right: 0;
  background: linear-gradient(to left, var(--ink), transparent);
}

.proof-bar__track {
  display: flex;
  align-items: center;
  gap: 3.5rem;
  white-space: nowrap;
  animation: proofScroll 34s linear infinite;
}

.proof-bar__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.proof-bar__logo {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.85;
  vertical-align: middle;
}

.proof-bar__wordmark {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.72);
  flex-shrink: 0;
  text-transform: none;
  white-space: nowrap;
}

.proof-bar__wordmark--green {
  color: #76b900;
}

.proof-bar__badge {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 0.08rem 0.35rem;
  border-radius: 3px;
  flex-shrink: 0;
}

.proof-bar__name {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 0.9rem;
  font-style: italic;
  color: rgba(255,255,255,0.72);
  letter-spacing: 0.01em;
  flex-shrink: 0;
}

.proof-bar__sep {
  color: rgba(255,255,255,0.18);
  font-size: 0.75rem;
  flex-shrink: 0;
}

@keyframes proofScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .proof-bar__track { animation: none; }
}

/* ============================================================
   PIXEL BRAIN — neuron-fire animation on hero tag logo
   ============================================================ */
@keyframes neuronBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.15; }
}

.hero__tag-icon svg rect:nth-child(14),
.hero__tag-icon svg rect:nth-child(19) {
  animation: neuronBlink 2.4s ease-in-out infinite;
}
.hero__tag-icon svg rect:nth-child(20),
.hero__tag-icon svg rect:nth-child(23) {
  animation: neuronBlink 2.4s ease-in-out infinite 0.4s;
}
.hero__tag-icon svg rect:nth-child(21),
.hero__tag-icon svg rect:nth-child(25) {
  animation: neuronBlink 2.4s ease-in-out infinite 0.8s;
}
.hero__tag-icon svg rect:nth-child(22),
.hero__tag-icon svg rect:nth-child(24) {
  animation: neuronBlink 2.4s ease-in-out infinite 1.2s;
}
.hero__tag-icon svg rect:nth-child(26),
.hero__tag-icon svg rect:nth-child(29) {
  animation: neuronBlink 2.4s ease-in-out infinite 1.6s;
}
.hero__tag-icon svg rect:nth-child(27),
.hero__tag-icon svg rect:nth-child(30) {
  animation: neuronBlink 2.4s ease-in-out infinite 2.0s;
}

@media (prefers-reduced-motion: reduce) {
  .hero__tag-icon svg rect { animation: none !important; }
}

/* ============================================================
   /os PAGE — Learning Machines OS — desktop-OS, no-scroll
   ============================================================ */

/* Lock body to viewport on this page only (class added via JS) */
html.os-page,
html.os-page body {
  overflow: hidden;
  height: 100%;
}

/* --- Full-viewport background --- */
.os-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url('assets/footer-toronto.png');
  background-size: cover;
  background-position: center bottom;
}

/* Dark overlay so UI elements read clearly */
.os-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 10, 22, 0.55) 0%,
    rgba(6, 10, 22, 0.38) 50%,
    rgba(6, 10, 22, 0.65) 100%
  );
}

/* --- Week pill: centered at top, replaces nav pill --- */
.os-week-pill {
  position: fixed;
  top: 1.1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 1.1rem 0.42rem 0.75rem;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 99px;
  color: rgba(255, 255, 255, 0.9);
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  white-space: nowrap;
}

.os-week-pill__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7ed87e;
  box-shadow: 0 0 6px rgba(126, 216, 126, 0.7);
  flex-shrink: 0;
}

/* --- Canvas: fills viewport, holds left + right panels --- */
.os-canvas {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 60px;
  /* leave room for week pill at top */
  padding-top: 60px;
  padding-bottom: 20px;
  pointer-events: none; /* canvas itself is not interactive */
}

/* Re-enable pointer events on actual interactive children */
.os-canvas > * {
  pointer-events: auto;
}

/* --- LEFT: frosted-glass CTA cards --- */
.os-left {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 300px;
}

.os-cta-primary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.6rem 1.75rem;
  background: rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 16px;
  color: #ffffff;
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: clamp(1.25rem, 1.8vw, 1.65rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.22;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
  text-decoration: none;
}

.os-cta-primary:hover {
  background: rgba(255, 255, 255, 0.17);
  border-color: rgba(255, 255, 255, 0.34);
  transform: translateY(-1px);
}

.os-cta-primary__arrow {
  font-size: 1.35rem;
  opacity: 0.55;
  flex-shrink: 0;
  font-family: sans-serif;
}

.os-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.2rem;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 99px;
  color: rgba(255, 255, 255, 0.7);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 400;
  transition: background 0.2s, color 0.2s, transform 0.15s;
  text-decoration: none;
  align-self: flex-start;
}

.os-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.92);
  transform: translateY(-1px);
}

/* --- RIGHT: pixel-art desktop shortcuts --- */
.os-shortcuts {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.6rem;
  align-items: center;
}

.os-shortcut {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease;
  cursor: pointer;
}

.os-shortcut:hover {
  transform: scale(1.08);
  filter: brightness(1.18);
}

/* Frosted-glass folder frame around each icon */
.os-shortcut__icon {
  width: 64px;
  height: 68px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  border: 1px solid rgba(255, 255, 255, 0.20);
  clip-path: polygon(0 0, 72% 0, 100% 28%, 100% 100%, 0 100%);
  image-rendering: pixelated;
}

/* Fold corner — subtly brighter frosted area */
.os-shortcut__icon::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 28%;
  height: 28%;
  background: rgba(255, 255, 255, 0.14);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

/* Pixel art glyph sits centred inside the frame */
.os-shortcut__icon svg {
  position: relative;
  z-index: 1;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 44px;
  height: 44px;
}

.os-shortcut__label {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  font-weight: 400;
  color: #ffffff;
  text-align: center;
  line-height: 1.3;
  letter-spacing: 0.02em;
  white-space: nowrap;
  text-shadow:
    1px 1px 0 rgba(0,0,0,0.9),
    -1px -1px 0 rgba(0,0,0,0.9),
    1px -1px 0 rgba(0,0,0,0.9),
    -1px 1px 0 rgba(0,0,0,0.9),
    0 2px 6px rgba(0,0,0,0.8);
}

/* --- BOTTOM TICKER --- */
.os-ticker {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 28px;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  display: flex;
  align-items: center;
  z-index: 50;
}

.os-ticker__track {
  display: flex;
  align-items: center;
  white-space: nowrap;
  animation: os-ticker-scroll 28s linear infinite;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
}

.os-ticker__track a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s;
}

.os-ticker__track a:hover {
  color: #ffffff;
}

@keyframes os-ticker-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* --- OS top-meta week label --- */
.top-meta__week {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

/* --- Mobile: stack layout, allow slight scroll if needed --- */
@media (max-width: 720px) {
  html.os-page,
  html.os-page body {
    overflow: auto;
    height: auto;
  }

  .os-bg {
    position: fixed; /* still cover viewport as bg */
  }

  .os-canvas {
    position: relative;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    padding: 100px 24px 60px;
    min-height: 100svh;
  }

  .os-left {
    width: 100%;
    max-width: 320px;
    align-items: center;
  }

  .os-cta-primary {
    width: 100%;
  }

  .os-shortcuts {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    height: auto;
    gap: 1.5rem 2rem;
    width: 100%;
    max-width: 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .os-ticker__track {
    animation: none;
  }
}

/* --- Countdown (above submit CTA) --- */
.os-countdown {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.48);
  margin: 0 0 0.15rem 0.2rem;
  min-height: 1em;
  transition: color 0.4s ease;
}

.os-countdown--warn {
  color: #f5c54a;
}

.os-countdown--urgent {
  color: #ff6b6b;
  animation: os-pulse 1s ease-in-out infinite;
}

@keyframes os-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* --- Week progress dots --- */
.os-week-dots {
  position: fixed;
  top: 3.6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 5px;
  align-items: center;
  z-index: 100;
}

.os-week-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.28);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.os-week-dot.is-done {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(255, 255, 255, 0.72);
}

.os-week-dot.is-current {
  background: #7ed87e;
  border-color: #7ed87e;
  box-shadow: 0 0 6px rgba(126, 216, 126, 0.85);
}

/* --- Centred motivational headline --- */
.os-headline {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Instrument Serif', 'Newsreader', Georgia, serif;
  font-size: clamp(3.5rem, 6vw, 6rem);
  font-style: italic;
  color: rgba(255, 255, 255, 0.22);
  text-align: center;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.025em;
  z-index: 2;
}

/* --- Confetti canvas overlay --- */
#os-confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}