/* ─────────────────────────────────────────────────────────────────────────────
   Design tokens — extracted from invisionu.education JSON design export
   Colors: #141414 (×998), #ffffff (×110), #c1f11d (×7)
   Font: Raleway Variable Font Wght, Arial
   Radius: 1920px (buttons/badges), 12px (cards/divs)
   Spacing scale (8px): 4 · 16 · 20 · 32 · 40 · 60 · 100px
   Borders: 1px solid #141414 everywhere — NO box-shadows
───────────────────────────────────────────────────────────────────────────── */
:root {
  /* Palette (verbatim from JSON) */
  --c-black:      #141414;          /* rgb(20,20,20)   ×998 */
  --c-white:      #ffffff;          /* rgb(255,255,255) ×110 */
  --c-lime:       #c1f11d;          /* rgb(193,241,29)  ×7  */
  --c-lime-light: #effbb4;          /* hover/focus tint     */
  --c-lime-alt:   #edfbbc;          /* hover variant        */
  --c-mid:        #595959;          /* secondary text       */
  --c-muted:      #bababa;          /* disabled/placeholder */
  --c-border:     #141414;          /* all borders = black  */
  --c-bg:         #ffffff;
  --c-bg-alt:     #f5f5f0;          /* off-white sections   */

  /* Scroll-driven page colors (updated by JS on scroll) */
  --page-bg:          #ffffff;
  --page-text:        #141414;
  --page-text-muted:  rgba(20,20,20,.55);
  --page-text-faint:  rgba(20,20,20,.3);
  --page-border:      rgba(20,20,20,.15);

  /* Typography (from JSON typography.styles) */
  --font:         "Raleway", Arial, sans-serif;
  --fs-h1:        4.375rem;   /* 70px  w800 lh1.00 */
  --fs-h2:        3.75rem;    /* 60px  w700 lh1.20 */
  --fs-h3:        2.5rem;     /* 40px  w800 lh1.20 */
  --fs-h4:        2rem;       /* 32px  w700 lh1.20 */
  --fs-h5:        1.5rem;     /* 24px  w700 lh1.30 */
  --fs-body:      1.125rem;   /* 18px  w500 lh1.40 */
  --fs-btn:       1rem;       /* 16px  w700        */
  --fs-badge:     1rem;       /* 16px  w500        */
  --fs-caption:   0.875rem;   /* 14px  w500 lh1.30 */

  /* Spacing scale (8px base, from JSON spacing.commonValues) */
  --sp-4:   4px;
  --sp-16:  16px;
  --sp-20:  20px;
  --sp-32:  32px;
  --sp-40:  40px;
  --sp-60:  60px;
  --sp-100: 100px;

  /* Border radius (from JSON borderRadius.values) */
  --r-card:   12px;    /* div cards */
  --r-pill:   1920px;  /* buttons, badges, images */

  /* Navbar */
  --nav-h: 56px;

  /* Tone aliases (keep compat) */
  --tone-100: var(--c-black);
  --accent:   var(--c-lime);
}

/* ── SVG Icons (CSS mask — inherits currentColor) ────────────────────────────── */
.ico {
  display: inline-block;
  background-color: currentColor;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  flex-shrink: 0;
  vertical-align: middle;
}
.ico--person         { -webkit-mask-image: url('/static/icons/person.svg');        mask-image: url('/static/icons/person.svg'); }
.ico--target         { -webkit-mask-image: url('/static/icons/target.svg');        mask-image: url('/static/icons/target.svg'); }
.ico--smart-toy      { -webkit-mask-image: url('/static/icons/smart-toy.svg');     mask-image: url('/static/icons/smart-toy.svg'); }
.ico--group          { -webkit-mask-image: url('/static/icons/group.svg');         mask-image: url('/static/icons/group.svg'); }
.ico--trending-up    { -webkit-mask-image: url('/static/icons/trending-up.svg');   mask-image: url('/static/icons/trending-up.svg'); }
.ico--balance        { -webkit-mask-image: url('/static/icons/balance.svg');       mask-image: url('/static/icons/balance.svg'); }
.ico--work           { -webkit-mask-image: url('/static/icons/work.svg');          mask-image: url('/static/icons/work.svg'); }
.ico--laptop         { -webkit-mask-image: url('/static/icons/laptop.svg');        mask-image: url('/static/icons/laptop.svg'); }
.ico--eco            { -webkit-mask-image: url('/static/icons/eco.svg');           mask-image: url('/static/icons/eco.svg'); }
.ico--corporate-fare { -webkit-mask-image: url('/static/icons/corporate-fare.svg');mask-image: url('/static/icons/corporate-fare.svg'); }
.ico--dashboard      { -webkit-mask-image: url('/static/icons/dashboard.svg');     mask-image: url('/static/icons/dashboard.svg'); }
.ico--assignment     { -webkit-mask-image: url('/static/icons/assignment.svg');    mask-image: url('/static/icons/assignment.svg'); }
.ico--hourglass      { -webkit-mask-image: url('/static/icons/hourglass.svg');     mask-image: url('/static/icons/hourglass.svg'); }
.ico--star           { -webkit-mask-image: url('/static/icons/star.svg');          mask-image: url('/static/icons/star.svg'); }
.ico--check-circle   { -webkit-mask-image: url('/static/icons/check-circle.svg');  mask-image: url('/static/icons/check-circle.svg'); }
.ico--cancel         { -webkit-mask-image: url('/static/icons/cancel.svg');        mask-image: url('/static/icons/cancel.svg'); }
.ico--close          { -webkit-mask-image: url('/static/icons/close.svg');         mask-image: url('/static/icons/close.svg'); }
.ico--refresh        { -webkit-mask-image: url('/static/icons/refresh.svg');       mask-image: url('/static/icons/refresh.svg'); }
.ico--check          { -webkit-mask-image: url('/static/icons/check.svg');         mask-image: url('/static/icons/check.svg'); }
.ico--pending        { -webkit-mask-image: url('/static/icons/pending.svg');       mask-image: url('/static/icons/pending.svg'); }
.ico--warning        { -webkit-mask-image: url('/static/icons/warning.svg');       mask-image: url('/static/icons/warning.svg'); }

/* ── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1.4;
  color: var(--c-black);
  background: var(--c-white);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
button { font-family: var(--font); cursor: pointer; }

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--sp-40);
}

/* Section vertical padding: 100px top/bottom */
.section { padding: var(--sp-100) 0; }
.section > .container { position: relative; z-index: 1; }

/* ── Typography ──────────────────────────────────────────────────────────────── */
/* H1: 70px w800 lh1.0 */
.t-h1 { font-size: var(--fs-h1); font-weight: 800; line-height: 1.0; }
/* H2: 60px w700 lh1.2 */
.t-h2 { font-size: var(--fs-h2); font-weight: 700; line-height: 1.2; }
/* H3: 40px w800 lh1.2 */
.t-h3 { font-size: var(--fs-h3); font-weight: 800; line-height: 1.2; }
/* H4: 32px w700 lh1.2 */
.t-h4 { font-size: var(--fs-h4); font-weight: 700; line-height: 1.2; }
/* H5: 24px w700 lh1.3 */
.t-h5 { font-size: var(--fs-h5); font-weight: 700; line-height: 1.3; }
/* Body: 18px w500 lh1.4 */
.t-body { font-size: var(--fs-body); font-weight: 500; line-height: 1.4; }
/* Caption: 14px w500 lh1.3 */
.t-caption { font-size: var(--fs-caption); font-weight: 500; line-height: 1.3; }

/* Use semantic tags with these exact specs */
h1 { font-size: var(--fs-h1); font-weight: 800; line-height: 1.0; }
h2 { font-size: var(--fs-h3); font-weight: 800; line-height: 1.2; }  /* 40px */
h3 { font-size: var(--fs-h4); font-weight: 700; line-height: 1.2; }  /* 32px */
h4 { font-size: var(--fs-h5); font-weight: 700; line-height: 1.3; }  /* 24px */
p  { font-size: var(--fs-body); font-weight: 500; line-height: 1.4; color: var(--c-mid); }

/* Section label */
.label {
  display: inline-block;
  font-size: var(--fs-caption);
  font-weight: 500;
  color: var(--c-muted);
  margin-bottom: var(--sp-20);
}

/* Links — from JSON links component */
a.link-default {
  color: var(--c-black);
  text-decoration: underline;
  font-weight: 500;
}
a.link-default:hover { color: var(--c-lime); text-decoration: underline; }

a.link-white {
  color: var(--c-white);
  text-decoration: none;
  font-weight: 700;
}
a.link-white:hover { color: var(--c-black); }

/* ── Buttons — from JSON components.buttons ──────────────────────────────────── */
/*
  Filled:  bg #141414, color #fff, border 1px solid #141414, radius 1920px, p 19.2px 20px, fs 16px w700
  Outline: bg transparent, color #141414, border 1px solid #141414, radius 1920px, p 19.2px 20px, fs 16px w700
  Small:   bg transparent, color #141414, border 1px solid #141414, radius 1920px, p 6px 16px, fs 16px w700
  Hover: opacity 0.7 (from JSON hover states)
*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  border-radius: var(--r-pill);
  font-family: var(--font);
  font-size: var(--fs-btn);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid var(--c-black);
  transition: opacity .15s ease;
  white-space: nowrap;
}
.btn:hover { opacity: 0.7; }

/* Filled (primary) */
.btn-filled {
  background: var(--c-black);
  color: var(--c-white);
  padding: 19.2px var(--sp-20);
}

/* Outline on light bg */
.btn-outline {
  background: transparent;
  color: var(--c-black);
  padding: 19.2px var(--sp-20);
}

/* Small outline */
.btn-xs {
  background: transparent;
  color: var(--c-black);
  padding: 6px var(--sp-16);
  font-size: var(--fs-btn);
}

/* Lime filled (accent CTA) */
.btn-lime {
  background: var(--c-lime);
  color: var(--c-black);
  border-color: var(--c-lime);
  padding: 19.2px var(--sp-20);
}

/* On dark background — white outline */
.btn-outline-white {
  background: transparent;
  color: var(--c-white);
  border-color: var(--c-white);
  padding: 19.2px var(--sp-20);
}

/* ── Badges — from JSON components.badges ────────────────────────────────────── */
/*
  Filled:  bg #141414, color #fff, p 0 16px, radius 1920px, border 1px solid #141414, fs 16px w500 lh 25.2px
  Outline: bg transparent, color #141414, same
*/
.badge {
  display: inline-block;
  padding: 0 var(--sp-16);
  border-radius: var(--r-pill);
  font-family: var(--font);
  font-size: var(--fs-badge);
  font-weight: 500;
  line-height: 25.2px;
  letter-spacing: normal;
  text-transform: none;
  border: 1px solid var(--c-black);
  white-space: nowrap;
}
.badge-filled  { background: var(--c-black); color: var(--c-white); }
.badge-outline { background: transparent;    color: var(--c-black); }
.badge-lime    { background: var(--c-lime);  color: var(--c-black); border-color: var(--c-lime); }

/* ── Navbar ──────────────────────────────────────────────────────────────────── */
/*
  Border: 0px 0px 1px solid #141414 (from JSON borders — header)
  bg: white, fixed, height ~56px
*/
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--c-white);
  border-bottom: 1px solid var(--c-black);
  display: flex;
  align-items: center;
}

.nav-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-40);
}

/* Logo: from JSON logo width 260 × height 23 */
.nav-logo {
  font-size: 1.4375rem;  /* ~23px height equivalent */
  font-weight: 800;
  line-height: 1;
  display: flex;
  align-items: center;
  color: var(--c-black);
  letter-spacing: -0.02em;
}
/* "BilimLab" logo style */
.nav-logo .logo-in    { color: var(--c-black); }
.nav-logo .logo-brand { color: var(--c-black); }

/* Nav links: 16px w700, hover #c1f11d — from JSON */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-40);
  list-style: none;
}
.nav-links a {
  font-size: var(--fs-btn);
  font-weight: 700;
  color: var(--c-black);
  text-decoration: none;
  transition: color .15s;
}
.nav-links a:hover { color: var(--c-lime); }

/* CTA in nav = small btn-filled */
.nav-cta {
  background: var(--c-black);
  color: var(--c-white) !important;
  border: 1px solid var(--c-black);
  border-radius: var(--r-pill);
  padding: 6px var(--sp-16);
  font-size: var(--fs-btn);
  font-weight: 700;
  transition: opacity .15s;
}
.nav-cta:hover { opacity: 0.7; color: var(--c-white) !important; }
button.nav-cta { cursor: pointer; font-family: var(--font); text-decoration: none; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.burger span { display: block; width: 24px; height: 2px; background: var(--c-black); }

/* ── Hero ────────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: var(--c-black);
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}
.hero .container { position: relative; z-index: 2; width: 100%; }

.hero p { color: rgba(255,255,255,.65); }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  background: transparent;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-pill);
  padding: 0 var(--sp-16);
  font-size: var(--fs-badge);
  font-weight: 500;
  line-height: 25.2px;
  color: var(--c-lime);
  margin-bottom: var(--sp-40);
}

.hero h1 {
  font-size: var(--fs-h1); /* 70px */
  font-weight: 800;
  line-height: 1.0;
  color: var(--c-white);
  max-width: 12ch;
  margin-bottom: var(--sp-20);
}
.hero h1 .accent { color: var(--c-lime); }

.hero-sub {
  font-size: var(--fs-body); /* 18px w500 lh1.4 */
  font-weight: 500;
  line-height: 1.4;
  color: rgba(255,255,255,.65);
  max-width: 600px;
  margin-bottom: var(--sp-40);
}

.hero-actions {
  display: flex;
  gap: var(--sp-20);
  flex-wrap: wrap;
  margin-bottom: var(--sp-60);
}

/* Stats strip — border on right between items (from JSON 0px 1px 0px 0px style) */
.hero-stats {
  display: flex;
  width: fit-content;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-card);
  overflow: hidden;
}
.hero-stat {
  padding: var(--sp-20) var(--sp-40);
  border-right: 1px solid rgba(255,255,255,.2);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-stat:last-child { border-right: none; }
.stat-num   { font-size: 2.5rem; font-weight: 800; line-height: 1.0; color: var(--c-white); }
.stat-label { font-size: var(--fs-caption); font-weight: 500; color: rgba(255,255,255,.55); }

/* ── About ───────────────────────────────────────────────────────────────────── */
.about { background: var(--c-white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-100);
  align-items: start;
  position: relative;
}

.about-text-col { position: relative; z-index: 1; }

/* Background image — spans the full grid, bleeds past left edge */
.about-bg-img {
  position: absolute;
  top: -60px;
  left: -120px;
  right: -40px;
  bottom: -60px;
  width: auto;
  height: calc(100% + 120px);
  object-fit: cover;
  object-position: left center;
  opacity: 0;
  pointer-events: none;
  border-radius: 28px;
  filter: grayscale(10%);
  mix-blend-mode: multiply;
  transition: opacity 1.4s ease;
  z-index: 0;
}
.about-bg-img.visible { opacity: 0.32; }

.features-line-img {
  position: absolute;
  right: -120px;
  top: 50%;
  transform: translateY(-50%);
  width: 63%;
  height: auto;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  mix-blend-mode: multiply;
  transition: opacity 1.4s ease;
  z-index: 0;
}
.features-line-img.visible { opacity: 0.55; }

@media (max-width: 767px) {
  .features-line-img { display: none; }
}

.logo-divider {
  width: 100%;
  overflow: hidden;
  line-height: 0;
  padding: 0;
  margin: 0;
  background: var(--c-white);
}
.logo-divider-img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.logo-divider-img.visible { opacity: 1; }

.features-bg-img {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  height: auto;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  transition: opacity 1.4s ease;
  z-index: 0;
}
.features-bg-img.visible { opacity: 0.6; }

.process-line-img {
  position: absolute;
  left: -200px;
  top: 50%;
  transform: translateY(-50%) rotate(10deg);
  height: 125%;
  width: auto;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  filter: grayscale(10%) brightness(1.1);
  mix-blend-mode: multiply;
  transition: opacity 1.4s ease;
  z-index: 0;
}
.process-line-img.visible { opacity: 0.38; }

@media (max-width: 767px) {
  .process-line-img { display: none; }
}

.about-grid h2 { color: var(--c-black); margin-bottom: var(--sp-20); }
.about-grid p  { margin-bottom: var(--sp-16); }
.about-grid p strong { color: var(--c-black); font-weight: 700; }

/* Tags = outline badges */
.about-tags  { display: flex; flex-wrap: wrap; gap: var(--sp-16); margin-top: var(--sp-20); }
.tag {
  display: inline-block;
  padding: 0 var(--sp-16);
  border-radius: var(--r-pill);
  border: 1px solid var(--c-black);
  font-size: var(--fs-badge);
  font-weight: 500;
  line-height: 25.2px;
  color: var(--c-black);
  background: transparent;
  cursor: pointer;
  transition: background .35s ease, border-color .35s ease, color .35s ease, box-shadow .35s ease;
}
.tag:hover {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-black);
  box-shadow: 0 0 0 4px rgba(193,241,29,.25);
}

/* ── Bento grid ─────────────────────────────────────────────────────────────── */
.cards-2x2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 10px;
}
.cards-2x2 .info-card:nth-child(1) { grid-column: span 2; }
.cards-2x2 .info-card:nth-child(2) { grid-column: span 1; }
.cards-2x2 .info-card:nth-child(3) { grid-column: span 1; }
.cards-2x2 .info-card:nth-child(4) { grid-column: span 2; }

/* Info card — bento style */
.info-card {
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,.55);
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 20px;
  padding: var(--sp-32);
  display: flex;
  flex-direction: column;
  gap: 10px;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.9),
    inset 0 -1px 0 rgba(0,0,0,.04),
    0 4px 20px rgba(0,0,0,.07),
    0 1px 3px rgba(0,0,0,.06);
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
}
/* Top shine */
.info-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.9), transparent);
  pointer-events: none;
}
/* Corner reflection */
.info-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 55%; height: 45%;
  background: radial-gradient(ellipse at 15% 0%, rgba(255,255,255,.35) 0%, transparent 65%);
  pointer-events: none;
}
.info-card:hover {
  background: rgba(193,241,29,.22);
  border-color: rgba(193,241,29,.6);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.95),
    inset 0 -1px 0 rgba(0,0,0,.03),
    0 8px 32px rgba(193,241,29,.2),
    0 2px 8px rgba(0,0,0,.06);
}
.info-card-icon  { font-size: 1.75rem; line-height: 1; position: relative; z-index: 1; }
.info-card strong { display: block; font-size: var(--fs-btn); font-weight: 700; line-height: 1.2; color: var(--c-black); position: relative; z-index: 1; }
.info-card p     { font-size: 1rem; font-weight: 500; color: var(--c-mid); line-height: 1.4; margin: 0; position: relative; z-index: 1; }
.info-card:hover p { color: rgba(20,20,20,.7); }

/* ── Process (how it works) ──────────────────────────────────────────────────── */
.how { background: var(--c-white); }
.how .label { color: var(--c-black); }
.how h2 { color: var(--c-black); margin-bottom: var(--sp-40); }

/* Steps: left border on each li (from JSON 0px 0px 0px 1px solid) */
/* Steps wrapper */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 0;
  background: transparent;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

/* Liquid glass card */
.step {
  position: relative;
  padding: var(--sp-40) var(--sp-32);
  background: rgba(255,255,255,.55);
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.75);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.9),
    inset 0 -1px 0 rgba(0,0,0,.04),
    0 4px 20px rgba(0,0,0,.07),
    0 1px 3px rgba(0,0,0,.06);
  overflow: hidden;
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
}

/* Top shine streak */
.step::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.9), transparent);
  pointer-events: none;
}

/* Inner light reflection at top-left corner */
.step::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 55%;
  height: 45%;
  background: radial-gradient(ellipse at 15% 0%, rgba(255,255,255,.35) 0%, transparent 65%);
  pointer-events: none;
}

.step:hover {
  background: rgba(193,241,29,.22);
  border-color: rgba(193,241,29,.6);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.95),
    inset 0 -1px 0 rgba(0,0,0,.03),
    0 8px 32px rgba(193,241,29,.2),
    0 2px 8px rgba(0,0,0,.06);
}

.step-num {
  font-size: 3.75rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-black);
  opacity: 0.55;
  margin-bottom: var(--sp-20);
  font-variant-numeric: tabular-nums;
  position: relative; z-index: 1;
}
.step h3 { font-size: var(--fs-btn); font-weight: 700; color: var(--c-black); margin-bottom: var(--sp-16); line-height: 1.2; position: relative; z-index: 1; }
.step p  { font-size: var(--fs-caption); font-weight: 500; color: var(--c-mid); line-height: 1.3; margin: 0; position: relative; z-index: 1; }

/* HITL banner — border 1px solid, lime-light bg, radius 12px */
.hitl-banner {
  display: flex;
  gap: var(--sp-20);
  align-items: flex-start;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-black);
  border-radius: var(--r-card);
  padding: var(--sp-40);
  margin-top: var(--sp-40);
}
.hitl-banner .hitl-icon { font-size: 2rem; flex-shrink: 0; line-height: 1; }
.hitl-banner strong { font-size: var(--fs-btn); font-weight: 700; color: var(--c-black); display: block; margin-bottom: var(--sp-16); }
.hitl-banner p { font-size: var(--fs-body); color: var(--c-mid); line-height: 1.4; margin: 0; }
.hitl-banner em { color: #c94a2a; font-style: normal; }

/* ── Programs (features) ─────────────────────────────────────────────────────── */
.features { background: var(--c-white); }
.section-header { margin-bottom: var(--sp-40); }
.section-header h2 { margin-bottom: var(--sp-20); }

/* 4-col grid with left border dividers */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-20);
}
.feature-card {
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,.55);
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 20px;
  padding: var(--sp-32);
  display: flex;
  flex-direction: column;
  gap: 0;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.9),
    inset 0 -1px 0 rgba(0,0,0,.04),
    0 4px 20px rgba(0,0,0,.07),
    0 1px 3px rgba(0,0,0,.06);
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.9), transparent);
  pointer-events: none;
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 55%; height: 45%;
  background: radial-gradient(ellipse at 15% 0%, rgba(255,255,255,.35) 0%, transparent 65%);
  pointer-events: none;
}
.feature-card:hover {
  background: rgba(193,241,29,.22);
  border-color: rgba(193,241,29,.6);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.95),
    inset 0 -1px 0 rgba(0,0,0,.03),
    0 8px 32px rgba(193,241,29,.2),
    0 2px 8px rgba(0,0,0,.06);
}

.feature-card--dark { background: var(--c-black); color: var(--c-white); border-color: rgba(255,255,255,.12); }
.feature-card--dark::after { background: radial-gradient(ellipse at 15% 0%, rgba(255,255,255,.1) 0%, transparent 65%); }
.feature-card--dark:hover { background: #1a1a1a; border-color: rgba(193,241,29,.4); box-shadow: 0 8px 32px rgba(193,241,29,.15), 0 2px 8px rgba(0,0,0,.2); }
.feature-card--dark .feature-desc { color: rgba(255,255,255,.55); }
.feature-card--dark .feature-list li { color: rgba(255,255,255,.55); }
.feature-card--dark .feature-list li::before { color: var(--c-lime); }

.feature-card--lime { background: var(--c-lime); border-color: rgba(20,20,20,.15); }
.feature-card--lime:hover { background: var(--c-lime-alt); border-color: rgba(20,20,20,.25); box-shadow: 0 8px 32px rgba(193,241,29,.35), 0 2px 8px rgba(0,0,0,.06); }
.feature-card--lime .feature-desc { color: rgba(20,20,20,.65); }

.feature-icon { font-size: 2rem; margin-bottom: var(--sp-20); position: relative; z-index: 1; }
.feature-card h3 { font-size: var(--fs-h5); font-weight: 700; line-height: 1.3; margin-bottom: var(--sp-16); color: inherit; position: relative; z-index: 1; }
.feature-desc { font-size: var(--fs-body); font-weight: 500; color: var(--c-mid); line-height: 1.4; margin-bottom: var(--sp-16); position: relative; z-index: 1; }
.feature-list { display: flex; flex-direction: column; gap: 4px; position: relative; z-index: 1; }
.feature-list li { font-size: var(--fs-caption); font-weight: 500; color: var(--c-mid); padding-left: var(--sp-16); position: relative; line-height: 1.3; }
.feature-list li::before { content: '✓'; position: absolute; left: 0; color: var(--c-black); font-weight: 700; }

/* ── Application Form ────────────────────────────────────────────────────────── */
/* ── CTA section ─────────────────────────────────────────────────────────────── */
.cta-section { background: var(--c-white); }
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-40);
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 24px;
  padding: var(--sp-60);
  box-shadow: 0 24px 64px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.05);
}
.cta-inner h2 { color: var(--c-black); margin-bottom: var(--sp-16); }
.cta-inner .label { color: var(--c-black); opacity: 0.45; margin-bottom: var(--sp-16); display: block; }
.cta-inner p { color: var(--c-mid); max-width: 480px; margin: 0; }
.btn-cta {
  flex-shrink: 0;
  font-size: var(--fs-btn);
  font-weight: 700;
  padding: 18px 40px;
  white-space: nowrap;
  margin-right: 60px;
}

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.footer {
  background: var(--c-black);
  padding: var(--sp-40) 0;
  border-top: 1px solid rgba(255,255,255,.12);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-20);
}
.footer-logo {
  font-size: 1.4375rem;
  font-weight: 800;
  color: var(--c-white);
}
.footer-links { display: flex; gap: var(--sp-40); flex-wrap: wrap; }
.footer-links a {
  font-size: var(--fs-btn);
  font-weight: 700;
  color: rgba(255,255,255,.55);
  text-decoration: none;
  transition: color .15s;
}
.footer-links a:hover { color: var(--c-lime); }   /* hover: #c1f11d from JSON */
.footer-copy { font-size: var(--fs-caption); font-weight: 500; color: rgba(255,255,255,.3); }

/* ── Reveal animation ────────────────────────────────────────────────────────── */
@keyframes fadeUp { from { opacity:0; transform:translateY(var(--sp-20)); } to { opacity:1; transform:none; } }
.hero-eyebrow { animation: fadeUp .4s ease both .05s; }
.hero h1      { animation: fadeUp .4s ease both .1s; }
.hero-sub     { animation: fadeUp .4s ease both .15s; }
.hero-actions { animation: fadeUp .4s ease both .2s; }
.hero-stats   { animation: fadeUp .4s ease both .25s; }

.js-reveal { opacity:0; transform:translateY(var(--sp-20)); transition: opacity .4s ease, transform .4s ease; }
.js-reveal.visible { opacity:1; transform:none; }

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE — mobile-first breakpoints
   1279px  tablet-landscape
    991px  tablet-portrait / burger
    767px  large phone
    479px  small phone
═══════════════════════════════════════════════════════════════════════════ */

/* ── 1279px ─────────────────────────────────────────────────────────────── */
@media (max-width: 1279px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }

  .cards-2x2 { grid-template-columns: repeat(2, 1fr); }
  .cards-2x2 .info-card:nth-child(1) { grid-column: span 2; }
  .cards-2x2 .info-card:nth-child(2) { grid-column: span 1; }
  .cards-2x2 .info-card:nth-child(3) { grid-column: span 1; }
  .cards-2x2 .info-card:nth-child(4) { grid-column: span 2; }
}

/* ── 991px — tablet / burger ─────────────────────────────────────────────── */
@media (max-width: 991px) {
  :root {
    --sp-100: 60px;
    --sp-60:  40px;
    --fs-h1:  3.25rem;
    --fs-h2:  2.5rem;
    --fs-h3:  2rem;
  }

  /* Navbar */
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    background: var(--c-white);
    border-bottom: 1px solid rgba(20,20,20,.1);
    padding: var(--sp-20) var(--sp-40);
    gap: var(--sp-20);
    z-index: 999;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
  }
  .burger { display: flex; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: var(--sp-40); }
  .about-bg-img { left: -40px; right: -20px; }

  /* Steps */
  .steps { grid-template-columns: repeat(2, 1fr); }

  /* Features */
  .features-grid { grid-template-columns: repeat(2, 1fr); }

  /* CTA */
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-32);
    padding: var(--sp-40);
  }
  .btn-cta { margin-right: 0; width: 100%; justify-content: center; }
}

/* ── 767px — large phone ─────────────────────────────────────────────────── */
@media (max-width: 767px) {
  :root {
    --fs-h1:  2.5rem;
    --fs-h2:  2rem;
    --fs-h3:  1.625rem;
    --fs-h4:  1.375rem;
    --fs-h5:  1.25rem;
    --sp-100: 48px;
    --sp-60:  32px;
    --sp-40:  28px;
  }

  /* Layout */
  .container { padding: 0 var(--sp-20); }
  .section   { padding: var(--sp-60) 0; }

  /* Navbar */
  .nav-inner { padding: 0 var(--sp-20); }
  .nav-links.open { padding: var(--sp-20); }

  /* Hero */
  .hero {
    padding-top: calc(var(--nav-h) + 48px);
    padding-bottom: 48px;
    min-height: 100vh;
  }
  .hero h1 { max-width: 100%; }
  .hero-sub { max-width: 100%; }

  .about-bg-img { display: none; }

  /* Bento — single column */
  .cards-2x2 { grid-template-columns: 1fr; gap: 8px; }
  .cards-2x2 .info-card:nth-child(n) { grid-column: span 1; }

  /* Tags */
  .about-tags { gap: 8px; }

  /* Steps — single column */
  .steps { grid-template-columns: 1fr; gap: 8px; }

  /* HITL banner */
  .hitl-banner { flex-direction: column; padding: var(--sp-20); }

  /* Features */
  .features-grid { grid-template-columns: 1fr; }

  /* CTA */
  .cta-inner { padding: var(--sp-32); border-radius: 16px; }
  .cta-inner h2 { font-size: var(--fs-h3); }

  /* Footer */
  .footer-inner { flex-direction: column; gap: var(--sp-20); text-align: center; }
  .footer-links { justify-content: center; gap: var(--sp-20); flex-wrap: wrap; }

  /* Admin sidebar */
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; }
}

/* ── 479px — small phone ─────────────────────────────────────────────────── */
@media (max-width: 479px) {
  :root {
    --fs-h1: 2rem;
    --fs-h2: 1.75rem;
  }

  /* Nav */
  .nav-logo { font-size: 1.125rem; }

  /* Hero */
  .hero { padding-top: calc(var(--nav-h) + 32px); padding-bottom: 32px; min-height: 100vh; }

  /* About tags */
  .about-tags { gap: 6px; }
  .tag { font-size: 0.8125rem; padding: 0 12px; line-height: 22px; }

  /* Steps num */
  .step-num { font-size: 2.5rem; }
  .step { padding: var(--sp-20) var(--sp-20); }

  /* Feature cards */
  .feature-card { padding: var(--sp-20); }

  /* CTA */
  .cta-inner { padding: var(--sp-20); gap: var(--sp-20); }
  .btn-cta { padding: 14px var(--sp-20); font-size: 0.9375rem; }

  /* Footer links */
  .footer-links { gap: var(--sp-16); }
  .footer-links a { font-size: var(--fs-caption); }
}