:root {
  --ink: #172033;
  --muted: #647089;
  --line: #dbe2ee;
  --paper: #ffffff;
  --wash: #f4f7fb;
  --brand: #3157d5;
  --brand-dark: #213c9d;
  --success: #167c5a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--wash); }
a { color: inherit; }
.hero { background: linear-gradient(135deg, #182858, #3157d5 62%, #5a80ef); color: white; }
.hero-inner { max-width: 1160px; margin: auto; padding: 72px 24px 58px; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-weight: 700; font-size: .78rem; opacity: .8; }
h1 { font-size: clamp(2.5rem, 7vw, 5.2rem); line-height: .98; margin: 12px 0 20px; }
.lead { max-width: 800px; font-size: 1.15rem; line-height: 1.65; color: #e9efff; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 12px 17px; border-radius: 10px; border: 1px solid currentColor; text-decoration: none; font-weight: 700; }
.hero .button { color: white; }
.hero .button.primary { background: white; color: var(--brand-dark); border-color: white; }
.notice { max-width: 850px; font-size: .88rem; color: #d6e0ff; margin-top: 20px; }
main { max-width: 1160px; margin: auto; padding: 0 24px 70px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: -28px; }
.stats article { background: var(--paper); border: 1px solid var(--line); border-radius: 15px; padding: 22px; box-shadow: 0 8px 28px rgba(31, 47, 88, .08); }
.stats strong { display: block; font-size: 2rem; }
.stats span { color: var(--muted); }
.controls { display: grid; grid-template-columns: 1fr 260px; gap: 12px; margin: 38px 0 12px; }
input, select { width: 100%; padding: 13px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); font: inherit; }
.result-count { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { text-align: left; border: 1px solid var(--line); background: var(--paper); border-radius: 15px; padding: 19px; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(31,47,88,.10); }
.card h3 { margin: 0 0 9px; font-size: 1.05rem; }
.card p { color: var(--muted); line-height: 1.5; min-height: 4.5em; }
.badge { display: inline-block; border-radius: 999px; background: #e8edff; color: var(--brand-dark); padding: 5px 9px; font-size: .75rem; font-weight: 700; }
.metrics { display: flex; gap: 12px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 13px; font-size: .83rem; color: var(--muted); }
.metrics strong { color: var(--ink); }
.contribute { margin-top: 54px; padding: 30px; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; }
.contribute li { margin: 10px 0; line-height: 1.55; }
.contribute .button.primary { background: var(--brand); color: white; border-color: var(--brand); }
dialog { width: min(720px, calc(100vw - 32px)); border: 0; border-radius: 16px; padding: 28px; box-shadow: 0 30px 100px rgba(0,0,0,.3); }
dialog::backdrop { background: rgba(12,20,40,.55); }
.close { float: right; border: 0; background: none; font-size: 2rem; cursor: pointer; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 18px 0; }
.detail-grid div { background: var(--wash); border-radius: 10px; padding: 13px; }
.detail-grid strong { display: block; font-size: 1.2rem; }
@media (max-width: 720px) {
  .stats, .controls { grid-template-columns: 1fr; }
  .hero-inner { padding-top: 48px; }
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
}

.card .community-badge {
  background: #253044;
  color: #ffffff;
  border: 1px solid #253044;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.staging-note {
  margin-top: 22px;
  padding: 14px 16px;
  border-left: 4px solid var(--brand);
  background: var(--wash);
  color: var(--muted);
  line-height: 1.55;
}

.guide-layout {
  display: grid;
  gap: 18px;
  padding-top: 38px;
}

.guide-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px;
}

.guide-card h2 {
  margin-top: 0;
}

.guide-card p,
.guide-card li {
  line-height: 1.65;
}

.guide-card pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 10px;
  background: #111a2e;
  color: #edf2ff;
}

.warning-card {
  border-left: 5px solid #c77a00;
}

.staging-card {
  border-left: 5px solid var(--brand);
}


html {
  scroll-behavior: smooth;
}

.card {
  --category-background: #ffffff;
  --category-border: #dbe2ee;
  --category-accent: #3157d5;
  --category-badge: #e8edff;

  background: var(--category-background);
  border-color: var(--category-border);
  border-top: 5px solid var(--category-accent);
}

.card .badge-row .badge:first-child {
  background: var(--category-badge);
  color: var(--category-accent);
}

.category-dna {
  --category-background: #eef5ff;
  --category-border: #aac9ef;
  --category-accent: #2869c7;
  --category-badge: #dae9fc;
}

.category-expression,
.category-bulk-expression {
  --category-background: #fff4e9;
  --category-border: #edc69a;
  --category-accent: #b96512;
  --category-badge: #ffe3c3;
}

.category-functional-genomics {
  --category-background: #edf9f1;
  --category-border: #acd8b8;
  --category-accent: #267842;
  --category-badge: #d7f0df;
}

.category-knowledge {
  --category-background: #f5efff;
  --category-border: #cbb5e9;
  --category-accent: #7044ac;
  --category-badge: #e8dcfa;
}

.category-literature {
  --category-background: #fff0f4;
  --category-border: #e8b5c4;
  --category-accent: #ac3e61;
  --category-badge: #f9dce4;
}

.category-multimodal {
  --category-background: #eaf9fb;
  --category-border: #a5d7dd;
  --category-accent: #177684;
  --category-badge: #d3eff2;
}

.category-network {
  --category-background: #fff0ee;
  --category-border: #eab3ab;
  --category-accent: #af4437;
  --category-badge: #f9d9d4;
}

.category-protein {
  --category-background: #edf8f6;
  --category-border: #a5d4cb;
  --category-accent: #187361;
  --category-badge: #d2ede7;
}

.category-rna {
  --category-background: #fff9e7;
  --category-border: #e3cb88;
  --category-accent: #8a6810;
  --category-badge: #f5e7b6;
}

.category-regulatory {
  --category-background: #f0f1ff;
  --category-border: #b7bae7;
  --category-accent: #4c50ae;
  --category-badge: #dedff8;
}

.category-single-cell,
.category-single-cell-expression {
  --category-background: #fff0fa;
  --category-border: #e1b2d2;
  --category-accent: #9f3e7f;
  --category-badge: #f4daeb;
}

.category-other,
.category-uncategorized {
  --category-background: #f3f5f7;
  --category-border: #c7cdd5;
  --category-accent: #596576;
  --category-badge: #e1e5ea;
}

.contribute {
  scroll-margin-top: 24px;
  margin-top: 64px;
  padding: 34px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.section-label {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contribute h2 {
  margin-top: 0;
}

.contribute-intro {
  max-width: 800px;
  color: var(--muted);
  line-height: 1.65;
}

.instruction-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.instruction-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--wash);
}

.instruction-card.full-width {
  grid-column: 1 / -1;
}

.instruction-card h3 {
  margin: 8px 0 12px;
}

.instruction-card p,
.instruction-card li {
  line-height: 1.6;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 29px;
  height: 29px;
  border-radius: 50%;
  background: var(--brand);
  color: white;
  font-size: 0.85rem;
  font-weight: 800;
}

.category-list {
  font-weight: 650;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.cli-alternative {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.cli-alternative summary {
  cursor: pointer;
  font-weight: 700;
}

.cli-alternative pre,
.instruction-card pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 10px;
  background: #111a2e;
  color: #edf2ff;
}

@media (max-width: 720px) {
  .instruction-grid {
    grid-template-columns: 1fr;
  }

  .instruction-card.full-width {
    grid-column: auto;
  }

  .contribute {
    padding: 24px 18px;
  }
}

/* Summary statistic color */
.stats article {
  background: #eaf0ff;
  border-color: #afc2f2;
  box-shadow: 0 8px 28px rgba(49, 87, 213, 0.12);
}

.stats strong {
  color: #2448b8;
}

.stats span {
  color: #53658f;
}
/* End summary statistic color */

/* THEME TOGGLE */

.theme-toggle {
  position: absolute;
  top: 16px;
  right: 18px;
  z-index: 1000;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 42px;
  height: 42px;
  padding: 0;

  border: 1px solid rgba(23, 32, 51, .22);
  border-radius: 50%;

  color: #172033;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 5px 18px rgba(0, 0, 0, .15);

  font: inherit;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;

  transition:
    transform .15s ease,
    background .15s ease,
    color .15s ease,
    border-color .15s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-toggle:focus-visible {
  outline: 3px solid rgba(129, 156, 255, .55);
  outline-offset: 3px;
}

/*
Only the page background changes in night mode.
Cards, category palettes, badges and panels keep their original colors.
*/

html[data-theme="night"] {
  background: #090f1c;
}

html[data-theme="night"] body {
  background: #090f1c;
}

html[data-theme="night"] .theme-toggle {
  color: #f5f7ff;
  background: rgba(17, 24, 39, .96);
  border-color: #475569;
}

@media (max-width: 720px) {
  .theme-toggle {
    top: 10px;
    right: 10px;
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
  }
}

/* NIGHT COLORED PANELS */

/*
Very subtle darkening:
- preserves each category hue;
- does not recolor text, borders, or badges;
- avoids gray or washed-out cards.
*/

html[data-theme="night"] .card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

html[data-theme="night"] .card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;

  background: rgba(0, 0, 0, .01);

  -webkit-backdrop-filter:
    brightness(.88)
    saturate(1.70);

  backdrop-filter:
    brightness(.88)
    saturate(1.70);
}

html[data-theme="night"] .card > * {
  position: relative;
  z-index: 1;
}

html[data-theme="night"] .card:hover::before {
  -webkit-backdrop-filter:
    brightness(.92)
    saturate(1.90);

  backdrop-filter:
    brightness(.92)
    saturate(1.90);
}


/* HERO BACKGROUND IMAGE */

.hero {
  background-image:
    linear-gradient(
      90deg,
      rgba(3, 12, 32, .88) 0%,
      rgba(3, 17, 43, .72) 48%,
      rgba(3, 17, 43, .38) 100%
    ),
    url("hero-background.jpg");

  background-position: center 46%;
  background-size: cover;
  background-repeat: no-repeat;
}

@media (max-width: 720px) {
  .hero {
    background-position: 58% center;

    background-image:
      linear-gradient(
        rgba(3, 12, 32, .78),
        rgba(3, 12, 32, .78)
      ),
      url("hero-background.jpg");
  }
}


/* THEME-AWARE HERO BRIGHTNESS */

/*
Day mode uses a lighter overlay, making the DNA image brighter.
Night mode keeps a darker overlay for readability.
*/

.hero,
html[data-theme="day"] .hero {
  background-image:
    linear-gradient(
      90deg,
      rgba(3, 12, 32, .62) 0%,
      rgba(3, 17, 43, .38) 48%,
      rgba(3, 17, 43, .15) 100%
    ),
    url("hero-background.jpg");

  background-position: center 46%;
  background-size: cover;
  background-repeat: no-repeat;
}

html[data-theme="night"] .hero {
  background-image:
    linear-gradient(
      90deg,
      rgba(3, 10, 28, .88) 0%,
      rgba(3, 14, 36, .70) 48%,
      rgba(3, 14, 36, .42) 100%
    ),
    url("hero-background.jpg");
}

@media (max-width: 720px) {
  .hero,
  html[data-theme="day"] .hero {
    background-position: 58% center;

    background-image:
      linear-gradient(
        rgba(3, 12, 32, .58),
        rgba(3, 12, 32, .58)
      ),
      url("hero-background.jpg");
  }

  html[data-theme="night"] .hero {
    background-image:
      linear-gradient(
        rgba(3, 10, 28, .80),
        rgba(3, 10, 28, .80)
      ),
      url("hero-background.jpg");
  }
}

/* CONTINUOUS HERO PAGE BACKGROUND */

/*
Continue the blue tones of the DNA hero into the page.
The image itself is not repeated, so the content remains clear.
*/

html:not([data-theme]),
html[data-theme="day"] {
  background: #f5fafc;
}

html:not([data-theme]) body,
html[data-theme="day"] body {
  background:
    radial-gradient(
      circle at 75% 0%,
      rgba(42, 181, 224, .20),
      transparent 34rem
    ),
    linear-gradient(
      180deg,
      #0b3158 0,
      #78b9d5 390px,
      #d8edf5 650px,
      #f5fafc 1050px
    );

  background-attachment: fixed;
}

html[data-theme="night"] {
  background: #07111f;
}

html[data-theme="night"] body {
  background:
    radial-gradient(
      circle at 75% 0%,
      rgba(15, 126, 177, .18),
      transparent 34rem
    ),
    linear-gradient(
      180deg,
      #06182c 0,
      #0a2946 410px,
      #0a192b 720px,
      #07111f 1100px
    );

  background-attachment: fixed;
}

main {
  background: transparent;
}

/* SEAMLESS HERO CONTINUATION */

/*
One continuous image is placed behind the hero and the beginning
of the page. It gradually fades into the normal page background.
*/

html,
body {
  min-height: 100%;
}

body {
  position: relative;
  background: #f5fafc !important;
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;

  height: clamp(820px, 58vw, 1120px);

  background-image:
    linear-gradient(
      90deg,
      rgba(3, 12, 32, .60) 0%,
      rgba(3, 17, 43, .32) 50%,
      rgba(3, 17, 43, .10) 100%
    ),
    url("hero-background.jpg");

  background-position: center top;
  background-size: cover;
  background-repeat: no-repeat;

  -webkit-mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 48%,
      rgba(0, 0, 0, .93) 58%,
      rgba(0, 0, 0, .68) 72%,
      rgba(0, 0, 0, .30) 87%,
      transparent 100%
    );

  mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 48%,
      rgba(0, 0, 0, .93) 58%,
      rgba(0, 0, 0, .68) 72%,
      rgba(0, 0, 0, .30) 87%,
      transparent 100%
    );

  filter:
    brightness(1.06)
    saturate(1.06);

  pointer-events: none;
  z-index: 0;
}

.hero,
main,
.theme-toggle {
  position: relative;
  z-index: 1;
}

.hero {
  background: transparent !important;
  border-bottom-color: transparent;
}

main {
  background: transparent !important;
}


/* Night version */

html[data-theme="night"] body {
  background: #07111f !important;
}

html[data-theme="night"] body::before {
  background-image:
    linear-gradient(
      90deg,
      rgba(2, 8, 22, .80) 0%,
      rgba(3, 13, 34, .60) 50%,
      rgba(3, 13, 34, .30) 100%
    ),
    url("hero-background.jpg");

  filter:
    brightness(.86)
    saturate(1.12);
}


@media (max-width: 720px) {
  body::before {
    height: 900px;
    background-position: 58% top;

    -webkit-mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 46%,
        rgba(0, 0, 0, .75) 68%,
        transparent 100%
      );

    mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 46%,
        rgba(0, 0, 0, .75) 68%,
        transparent 100%
      );
  }
}

/* SMALLER IMAGE WITH BLUE FADE */

/*
The image uses its full width rather than being enlarged to cover
a very tall area. It ends sooner and fades into the blue page
background underneath it.
*/

html[data-theme="day"] body,
html:not([data-theme]) body {
  background:
    linear-gradient(
      180deg,
      #071a33 0,
      #0b355b 480px,
      #176b94 720px,
      #64afd0 980px,
      #b8dfea 1320px,
      #edf7fa 1720px,
      #f5fafc 2050px
    ) !important;
}

body::before {
  height: clamp(680px, 49vw, 900px);

  background-size: 100% auto;
  background-position: center top;

  -webkit-mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 52%,
      rgba(0, 0, 0, .92) 62%,
      rgba(0, 0, 0, .68) 75%,
      rgba(0, 0, 0, .32) 88%,
      transparent 100%
    );

  mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 52%,
      rgba(0, 0, 0, .92) 62%,
      rgba(0, 0, 0, .68) 75%,
      rgba(0, 0, 0, .32) 88%,
      transparent 100%
    );
}


/* Night mode uses the same transition with deeper blue tones. */

html[data-theme="night"] body {
  background:
    linear-gradient(
      180deg,
      #030b18 0,
      #061a30 500px,
      #082d4b 760px,
      #0a3655 1020px,
      #091e32 1420px,
      #07111f 1800px
    ) !important;
}


@media (max-width: 720px) {
  body::before {
    height: 720px;

    /*
    Slight enlargement is retained on narrow screens so the image
    does not leave empty horizontal space.
    */
    background-size: auto 720px;
    background-position: 56% top;

    -webkit-mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 48%,
        rgba(0, 0, 0, .82) 66%,
        rgba(0, 0, 0, .38) 84%,
        transparent 100%
      );

    mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 48%,
        rgba(0, 0, 0, .82) 66%,
        rgba(0, 0, 0, .38) 84%,
        transparent 100%
      );
  }

  html[data-theme="day"] body,
  html:not([data-theme]) body {
    background:
      linear-gradient(
        180deg,
        #071a33 0,
        #0b355b 430px,
        #247da3 700px,
        #8bc7dd 1000px,
        #e3f2f7 1450px,
        #f5fafc 1750px
      ) !important;
  }
}

/* FINAL HERO SIZE AND TOGGLE POSITION */

/*
The theme icon stays in the top-right corner of the page.
It is not fixed, so it disappears normally when scrolling.
*/

body > #theme-toggle,
.theme-toggle {
  position: absolute;
  top: 16px;
  right: 18px;
  z-index: 10000;
}


/*
Use a shorter image layer and begin fading it earlier.
The image disappears into the existing blue background.
*/

body::before {
  height: clamp(560px, 42vw, 720px);

  background-size: 100% auto;
  background-position: center top;

  -webkit-mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 34%,
      rgba(0, 0, 0, .92) 43%,
      rgba(0, 0, 0, .68) 55%,
      rgba(0, 0, 0, .38) 68%,
      rgba(0, 0, 0, .14) 78%,
      transparent 88%
    );

  mask-image:
    linear-gradient(
      to bottom,
      #000 0%,
      #000 34%,
      rgba(0, 0, 0, .92) 43%,
      rgba(0, 0, 0, .68) 55%,
      rgba(0, 0, 0, .38) 68%,
      rgba(0, 0, 0, .14) 78%,
      transparent 88%
    );
}


/* Keep the button and transition balanced on smaller screens. */

@media (max-width: 720px) {
  body > #theme-toggle,
  .theme-toggle {
    top: 10px;
    right: 10px;
  }

  body::before {
    height: 610px;
    background-size: auto 610px;
    background-position: 56% top;

    -webkit-mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 30%,
        rgba(0, 0, 0, .86) 42%,
        rgba(0, 0, 0, .52) 58%,
        rgba(0, 0, 0, .18) 73%,
        transparent 84%
      );

    mask-image:
      linear-gradient(
        to bottom,
        #000 0%,
        #000 30%,
        rgba(0, 0, 0, .86) 42%,
        rgba(0, 0, 0, .52) 58%,
        rgba(0, 0, 0, .18) 73%,
        transparent 84%
      );
  }
}

/* BEGIN FINAL MODALITY LABEL PALETTES */
/* These selectors mirror the existing Space palette under the final taxonomy labels. */
.category-dna-sequence {
  --category-background: #eef5ff;
  --category-border: #aac9ef;
  --category-accent: #2869c7;
  --category-badge: #dae9fc;
}

.category-expression,
.category-bulk-expression {
  --category-background: #fff4e9;
  --category-border: #edc69a;
  --category-accent: #b96512;
  --category-badge: #ffe3c3;
}

.category-functional-genomics,
.category-functional {
  --category-background: #edf9f1;
  --category-border: #acd8b8;
  --category-accent: #267842;
  --category-badge: #d7f0df;
}

.category-knowledge-graph,
.category-ontologies {
  --category-background: #f5efff;
  --category-border: #cbb5e9;
  --category-accent: #7044ac;
  --category-badge: #e8dcfa;
}

.category-biomedical-text {
  --category-background: #fff0f4;
  --category-border: #e8b5c4;
  --category-accent: #ac3e61;
  --category-badge: #f9dce4;
}

.category-multimodal {
  --category-background: #eaf9fb;
  --category-border: #a5d7dd;
  --category-accent: #177684;
  --category-badge: #d3eff2;
}

.category-networks {
  --category-background: #fff0ee;
  --category-border: #eab3ab;
  --category-accent: #af4437;
  --category-badge: #f9d9d4;
}

.category-protein-sequence {
  --category-background: #edf8f6;
  --category-border: #a5d4cb;
  --category-accent: #187361;
  --category-badge: #d2ede7;
}

.category-rna-sequence {
  --category-background: #fff9e7;
  --category-border: #e3cb88;
  --category-accent: #8a6810;
  --category-badge: #f5e7b6;
}

.category-regulatory-genomics {
  --category-background: #f0f1ff;
  --category-border: #b7bae7;
  --category-accent: #4c50ae;
  --category-badge: #dedff8;
}

.category-single-cell,
.category-single-cell-expression {
  --category-background: #fff0fa;
  --category-border: #e1b2d2;
  --category-accent: #9f3e7f;
  --category-badge: #f4daeb;
}
/* END FINAL MODALITY LABEL PALETTES */