/* ==================================================
   1. STRUCTURE / GLOBALS
   ================================================== */
/* ==================================================
   SANDBOX IN-PROGRESS NOTICE
   ================================================== */

.sandbox-notice {
  position: fixed;

  top: 82px;
  left: 50%;
  z-index: 9999;

  display: flex;
  align-items: center;
  gap: 10px;

  width: max-content;
  max-width: calc(100% - 30px);

  padding: 10px 16px;

  border: 1px solid rgba(255, 196, 97, 0.75);
  border-radius: 8px;

  background: rgba(54, 39, 8, 0.96);

  color: #ffd36f;

  box-shadow:
    0 12px 30px rgba(0, 0, 0, 0.35),
    0 0 18px rgba(255, 196, 97, 0.15);

  transform: translateX(-50%);

  backdrop-filter: blur(10px);
}

.sandbox-notice > span {
  color: #ffc461;

  font-size: 18px;
}

.sandbox-notice > div {
  display: grid;
  gap: 2px;
}

.sandbox-notice strong {
  color: #ffe0a0;

  font-size: 11px;
  font-weight: 600;

  letter-spacing: 0.08em;

  text-transform: uppercase;
}

.sandbox-notice small {
  color: #d8bd80;

  font-size: 9px;
  line-height: 1.4;
}

/* ---------- MOBILE ---------- */

@media (max-width: 700px) {
  .sandbox-notice {
    top: 62px;

    width: calc(100% - 24px);

    padding: 9px 12px;
  }

  .sandbox-notice small {
    font-size: 8px;
  }
}
:root {
  --blue: #5fc8ff;
  --blue-dark: #2f8dff;
  --violet: #8a67ff;

  --text: #edf6ff;
  --muted: #a8bbcf;

  --background: #030815;
}

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

html,
body {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
}

body {
  background: var(--background);
  color: var(--text);

  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

/* ---------- TYPOGRAPHY ---------- */

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.2;
  font-weight: 500;
}

p {
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- LINKS ---------- */

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

/* ---------- IMAGES ---------- */

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

/* ---------- FORM / BUTTON ELEMENTS ---------- */

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* ---------- MAIN SANDBOX ---------- */

main {
  position: relative;

  width: 100%;
  min-height: 100svh;

  overflow: hidden;

  background:
    linear-gradient(rgba(2, 7, 18, 0.04), rgba(2, 7, 18, 0.08)),
    url("sandbox-background.png") center / cover no-repeat;
}

/* ==================================================
   2. TOP HEADER / NAVIGATION
   ================================================== */

body > header {
  position: fixed;
  top: 22px;
  left: 0;
  z-index: 50;

  width: 100%;

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

  pointer-events: none;
}

body > header > * {
  pointer-events: auto;
}

/* ---------- TOP LEFT BRAND ---------- */

body > header .brand {
  position: absolute;
  left: 28px;
  top: 2px;

  display: flex;
  align-items: center;
  gap: 10px;

  color: white;
}

body > header .brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;

  filter: drop-shadow(0 0 6px rgba(84, 190, 255, 0.45));
}

body > header .brand span {
  display: grid;
  gap: 2px;
}

body > header .brand strong {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

body > header .brand small {
  color: #c8d8ea;
  font-size: 11px;
}

/* ---------- CENTER NAV ---------- */

body > header nav {
  display: flex;
  overflow: hidden;

  border: 1px solid rgba(117, 188, 255, 0.35);
  border-radius: 18px;

  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.07), transparent 30%),
    rgba(5, 18, 43, 0.8);

  box-shadow:
    0 15px 35px rgba(0, 0, 0, 0.3),
    inset 0 1px rgba(255, 255, 255, 0.1),
    0 0 18px rgba(64, 158, 255, 0.12);
}

body > header nav button {
  display: flex;
  align-items: center;
  gap: 8px;

  min-height: 60px;
  padding: 0 20px;

  border: 0;
  background: transparent;

  color: #cbd9e9;

  cursor: pointer;
}

body > header nav button + button {
  border-left: 1px solid rgba(117, 188, 255, 0.1);
}

body > header nav button span {
  color: var(--blue);
  font-size: 17px;
}

body > header nav button:hover,
body > header nav button:focus-visible {
  color: white;
  background: rgba(47, 141, 255, 0.15);
}

body > header nav button[aria-current="page"] {
  color: white;

  background: linear-gradient(
    rgba(47, 141, 255, 0.25),
    rgba(47, 141, 255, 0.08)
  );

  box-shadow: inset 0 -2px var(--blue);
}

body > header nav button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -3px;
}
/* ==================================================
   MOBILE MENU BUTTON
   hidden on desktop
   ================================================== */

.menu-toggle {
  display: none;

  width: 42px;
  height: 42px;

  padding: 10px;

  border: 1px solid rgba(95, 200, 255, 0.35);
  border-radius: 9px;

  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), transparent),
    rgba(5, 18, 43, 0.82);

  box-shadow:
    inset 0 1px rgba(255, 255, 255, 0.08),
    0 0 12px rgba(64, 158, 255, 0.1);

  cursor: pointer;
}

.menu-toggle span {
  display: block;

  width: 100%;
  height: 1px;

  margin: 5px 0;

  background: var(--blue);

  box-shadow: 0 0 5px rgba(95, 200, 255, 0.7);

  transition:
    transform 180ms ease,
    opacity 180ms ease;
}
/* ---------- TOP RIGHT TOOLS ---------- */

body > header .top-tools {
  position: absolute;
  right: 24px;
  top: 0;

  display: flex;
  align-items: flex-start;
  gap: 14px;

  color: white;
}

/* ---------- HELP ORB + TOOLTIP ---------- */

body > header .help {
  position: relative;

  display: flex;
  align-items: flex-start;
}

body > header .help > button {
  width: 44px;
  height: 44px;

  border: 1px solid rgba(95, 200, 255, 0.45);
  border-radius: 50%;

  background: radial-gradient(
    circle,
    rgba(120, 225, 255, 0.95) 0 10%,
    rgba(61, 176, 255, 0.35) 14%,
    rgba(12, 41, 92, 0.92) 35%,
    rgba(4, 17, 43, 0.95) 100%
  );

  box-shadow:
    0 0 10px rgba(76, 181, 255, 0.28),
    inset 0 0 10px rgba(105, 204, 255, 0.12);

  cursor: pointer;
}

body > header .help > button::before,
body > header .help > button::after {
  content: "";

  position: absolute;
  inset: 7px;

  border: 1px solid rgba(77, 183, 255, 0.35);
  border-radius: 50%;
}

body > header .help > button::after {
  inset: 12px;
  border-color: rgba(77, 183, 255, 0.2);
}

body > header .help > div {
  position: absolute;
  top: 50px;
  left: -8px;

  width: 185px;
  padding: 14px 14px 12px;

  border: 1px solid rgba(95, 170, 255, 0.28);
  border-radius: 12px;

  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), transparent 30%),
    rgba(7, 20, 46, 0.9);

  box-shadow:
    0 16px 30px rgba(0, 0, 0, 0.28),
    0 0 16px rgba(73, 162, 255, 0.08);
}

body > header .help > div::before {
  content: "";

  position: absolute;
  top: -8px;
  left: 20px;

  width: 14px;
  height: 14px;

  background: rgba(7, 20, 46, 0.9);

  border-top: 1px solid rgba(95, 170, 255, 0.28);
  border-left: 1px solid rgba(95, 170, 255, 0.28);

  transform: rotate(45deg);
}

body > header .help strong {
  display: block;

  margin-bottom: 8px;

  font-size: 12px;
  font-weight: 500;
}

body > header .help p {
  font-size: 11px;
  line-height: 1.5;
}

/* ---------- RETURN LINK ---------- */

body > header .top-tools > a {
  align-self: center;

  color: #dce7f2;
  font-size: 12px;
}

body > header .top-tools > a:hover,
body > header .top-tools > a:focus-visible {
  color: white;
}

/* ---------- CLOSE BUTTON ---------- */

body > header .close {
  width: 52px;
  height: 52px;

  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;

  background: rgba(4, 16, 38, 0.72);

  color: white;
  font-size: 28px;
  line-height: 1;

  cursor: pointer;
}

body > header .close:hover,
body > header .close:focus-visible {
  background: rgba(47, 141, 255, 0.12);
}
/* ==================================================
   3. CENTER LOGO
   ================================================== */

.logo-stage {
  position: absolute;
  top: 47%;
  left: 50%;
  z-index: 2;

  width: clamp(240px, 18vw, 440px);
  aspect-ratio: 1;

  display: grid;
  place-items: center;

  transform: translate(-50%, -50%);

  border: 1px solid rgba(89, 178, 255, 0.55);
  border-radius: 50%;

  /*
    bright node lights +
    transparent holographic center
  */
  background:
    radial-gradient(
      circle at 50% 1%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 92% 25%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 98% 56%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 78% 91%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 19% 88%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 2% 56%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle at 8% 25%,
      #d8f6ff 0 2px,
      #4db7ff 3px,
      transparent 6px
    ),
    radial-gradient(
      circle,
      rgba(40, 122, 255, 0.08),
      rgba(20, 65, 145, 0.025) 55%,
      transparent 72%
    );

  box-shadow:
    /* neighboring ring */
    0 0 0 7px rgba(74, 166, 255, 0.12),
    /* outer ring */ 0 0 0 15px rgba(82, 160, 255, 0.08),
    /* thin distant ring */ 0 0 0 17px rgba(112, 200, 255, 0.12),
    /* blue glow */ 0 0 18px rgba(68, 171, 255, 0.35),
    0 0 40px rgba(58, 121, 255, 0.12),
    /* subtle interior glow */ inset 0 0 30px rgba(61, 153, 255, 0.06);

  isolation: isolate;
}

/* ==================================================
   INNER CONCENTRIC RINGS
   ================================================== */

.logo-stage::before {
  content: "";

  position: absolute;
  inset: 8%;

  border: 1px solid rgba(93, 185, 255, 0.42);
  border-radius: 50%;

  box-shadow:
    /* second inside ring */
    0 0 0 8px rgba(78, 161, 255, 0.1),
    /* tiny blue glow */ 0 0 12px rgba(66, 168, 255, 0.17),
    inset 0 0 15px rgba(67, 157, 255, 0.07);

  pointer-events: none;
}
/* blue light beam */
/* hologram light rays rising from platform */

.logo-stage::after {
  content: "";

  position: absolute;

  /* begins around lower half of hologram */
  top: 55%;
  bottom: -20%;
  left: 29%;
  right: 29%;

  z-index: -1;

  /* several vertical hologram rays */
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 9%,
      rgba(105, 205, 255, 0.08) 10%,
      rgba(135, 225, 255, 0.55) 11%,
      rgba(105, 205, 255, 0.08) 12%,
      transparent 13% 20%
    ),
    linear-gradient(
      to top,
      rgba(80, 185, 255, 0.75),
      rgba(66, 160, 255, 0.25) 55%,
      transparent
    );

  /*
    wide at top, narrow at platform:
    rays fan UPWARD
  */
  clip-path: polygon(0 0, 100% 0, 58% 100%, 42% 100%);

  filter: drop-shadow(0 0 5px rgba(80, 190, 255, 0.6)) blur(0.4px);

  opacity: 0.2;

  pointer-events: none;
}
/* logo */

.logo-stage button {
  position: relative;
  z-index: 3;

  width: 58%;

  padding: 0;
  border: 0;
  background: none;

  cursor: pointer;
}
.logo-stage img {
  position: relative;
  z-index: 2;

  width: 100%;

  opacity: 0.95;

  filter: drop-shadow(0 0 4px rgba(220, 247, 255, 0.5))
    drop-shadow(0 0 12px rgba(80, 185, 255, 0.7))
    drop-shadow(0 0 24px rgba(64, 110, 255, 0.4));

  transition:
    transform 800ms ease,
    filter 200ms ease;
}
/* ==================================================
   ORBIT LINES BEHIND LOGO
   ================================================== */

.logo-stage button::before,
.logo-stage button::after {
  content: "";

  position: absolute;

  top: 50%;
  left: 50%;

  width: 145%;
  height: 42%;

  border: 1px solid rgba(69, 167, 255, 0.3);
  border-radius: 50%;

  pointer-events: none;

  transform: translate(-50%, -50%) rotate(-8deg);

  box-shadow: 0 0 8px rgba(66, 164, 255, 0.08);
}

.logo-stage button::after {
  width: 135%;
  height: 35%;

  border-color: rgba(78, 128, 255, 0.2);

  transform: translate(-50%, -50%) rotate(12deg);
}
/* logo spin */

.logo-stage button:hover img,
.logo-stage button:focus-visible img {
  transform: rotateY(360deg);

  filter: drop-shadow(0 0 5px white)
    drop-shadow(0 0 16px rgba(90, 205, 255, 0.9))
    drop-shadow(0 0 30px rgba(70, 120, 255, 0.6));
}

.logo-stage button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 8px;
  border-radius: 50%;
}
/* ==================================================
   4. BOTTOM NAVIGATION
   ================================================== */

body > footer {
  position: fixed;
  bottom: 24px;
  left: 50%;
  z-index: 50;

  transform: translateX(-50%);
}

body > footer nav {
  display: flex;

  padding: 5px;

  overflow: hidden;

  border: 1px solid rgba(117, 188, 255, 0.3);
  border-radius: 9px;

  background: rgba(5, 18, 43, 0.82);

  box-shadow:
    0 15px 35px rgba(0, 0, 0, 0.35),
    inset 0 1px rgba(255, 255, 255, 0.08),
    0 0 18px rgba(64, 158, 255, 0.1);
}

body > footer button {
  display: flex;
  align-items: center;
  gap: 7px;

  min-height: 42px;
  padding: 0 15px;

  border: 0;
  border-radius: 9px;

  background: transparent;
  color: #bdccdc;

  font-size: 12px;

  cursor: pointer;
}

body > footer button span {
  color: var(--blue);
  font-size: 15px;
}

body > footer button:hover,
body > footer button:focus-visible {
  color: white;
  background: rgba(47, 141, 255, 0.15);
}

body > footer button:focus-visible {
  outline: 1px solid var(--blue);
  outline-offset: -2px;
}
/* ==================================================
   5. GLASS PANELS
   ================================================== */

.glass-panel {
  position: absolute;
  z-index: 10;

  padding: 18px;

  border: 1px solid rgba(120, 190, 255, 0.2);
  border-radius: 9px;

  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.05), transparent 25%),
    rgba(5, 18, 43, 0.75);

  box-shadow:
    0 20px 45px rgba(0, 0, 0, 0.3),
    inset 0 1px rgba(255, 255, 255, 0.08),
    0 0 20px rgba(60, 150, 255, 0.08);

  overflow: hidden;
}

/* luminous border */

.glass-panel::before {
  content: "";

  position: absolute;
  inset: 0;

  padding: 1px;

  border-radius: inherit;

  pointer-events: none;

  background: linear-gradient(
    135deg,
    rgba(190, 235, 255, 0.9),
    rgba(90, 170, 255, 0.18) 30%,
    rgba(140, 90, 255, 0.22) 70%,
    rgba(120, 210, 255, 0.85)
  );

  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);

  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

/* brighter corners */

.glass-panel::after {
  content: "";

  position: absolute;
  inset: 0;

  pointer-events: none;

  background:
    radial-gradient(circle at 0 0, rgba(210, 245, 255, 0.65), transparent 12%),
    radial-gradient(
      circle at 100% 0,
      rgba(120, 220, 255, 0.75),
      transparent 12%
    ),
    radial-gradient(circle at 0 100%, rgba(100, 120, 255, 0.4), transparent 14%);

  opacity: 0.9;
}

/* panel heading */

.glass-panel h2 {
  position: relative;
  z-index: 1;

  margin-bottom: 14px;

  color: var(--blue);

  font-size: 15px;
  font-weight: 500;

  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* keep panel content above border effects */

.glass-panel > * {
  position: relative;
  z-index: 1;
}
/* ==================================================
   6. FEATURED
   ================================================== */

.featured {
  top: 14%;
  left: 4%;

  width: 34%;
  min-width: 420px;
}

/* ---------- MAIN FEATURE AREA ---------- */

.featured-content {
  display: grid;
  grid-template-columns: 30px 1fr 30px;
  gap: 8px;
  align-items: center;
}

/* ---------- ARROWS ---------- */

.featured .arrow {
  width: 30px;
  height: 30px;

  padding: 0;

  border: 1px solid rgba(95, 200, 255, 0.35);
  border-radius: 50%;

  background: rgba(5, 18, 43, 0.75);
  color: var(--blue);

  font-size: 22px;

  cursor: pointer;
}

.featured .arrow:hover {
  background: rgba(47, 141, 255, 0.2);
}

/* ---------- STACKED CARDS ---------- */

.card-stack {
  position: relative;
  min-height: 220px;
}

.card-stack > span,
.card-stack article {
  position: absolute;
  inset: 0;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  background: rgba(4, 16, 38, 0.65);
}

.card-stack > span:first-child {
  transform: translateX(-24px) scale(0.92);
  opacity: 0.25;
}

.card-stack > span:nth-child(2) {
  transform: translateX(-12px) scale(0.96);
  opacity: 0.45;
}

/* ---------- ACTIVE CARD ---------- */

.card-stack article {
  position: relative;
  z-index: 2;

  display: grid;
  grid-template-columns: 42% 1fr;
  gap: 14px;

  padding: 12px;
}

/* ---------- PROJECT IMAGE ---------- */

.project-image {
  min-height: 190px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  background:
    radial-gradient(
      circle at center,
      rgba(95, 200, 255, 0.35),
      transparent 30%
    ),
    #07152f;
}

/* ---------- PROJECT INFORMATION ---------- */

.project-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-info small {
  color: var(--blue);
  font-size: 9px;

  letter-spacing: 0.08em;
}

.project-info h3 {
  margin: 5px 0 8px;

  font-size: 21px;
}

.project-info p {
  font-size: 12px;
}

/* ---------- TAGS ---------- */

.tags {
  display: flex;
  flex-wrap: wrap;

  gap: 5px;

  margin: 10px 0;
}

.tags span {
  padding: 4px 6px;

  border-radius: 6px;

  background: rgba(47, 141, 255, 0.15);

  color: #acd9f7;

  font-size: 9px;
}

/* ---------- PROJECT LINK ---------- */

.project-info a {
  margin-top: auto;
  padding: 8px 10px;

  border: 1px solid rgba(95, 200, 255, 0.4);
  border-radius: 8px;

  background: rgba(47, 141, 255, 0.15);

  text-align: center;

  font-size: 11px;
}

.project-info a:hover {
  background: rgba(47, 141, 255, 0.28);
}

/* ---------- DOTS ---------- */

.dots {
  display: flex;
  justify-content: center;

  gap: 6px;

  margin-top: 12px;
}

.dots span {
  width: 6px;
  height: 6px;

  border-radius: 50%;

  background: #46617d;
}

.dots .active {
  background: var(--blue);

  box-shadow: 0 0 7px var(--blue);
}
/* ==================================================
   7. ROSETTA STONES
   ================================================== */

.rosetta {
  top: 14%;
  right: 4%;

  width: 30%;
  min-width: 420px;
}

/* ---------- HORIZONTAL SCROLL ---------- */

.stones {
  display: flex;
  gap: 14px;

  overflow-x: auto;
  overflow-y: hidden;

  padding: 4px 2px 10px;

  scrollbar-width: thin;
  scrollbar-color: rgba(95, 200, 255, 0.25) transparent;

  padding: 8px;
  /* background: rgba(47, 141, 255, 0.15); */
  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;
}

.stones::-webkit-scrollbar {
  height: 4px;
}

.stones::-webkit-scrollbar-track {
  background: transparent;
}

.stones::-webkit-scrollbar-thumb {
  background: rgba(95, 200, 255, 0.25);
  border-radius: 9px;
}

/* ---------- EACH STONE BUTTON ---------- */

.stones button {
  flex: 0 0 72px;

  display: grid;
  justify-items: center;
  gap: 7px;

  padding: 0;

  border: 0;
  background: none;

  color: var(--text);

  cursor: pointer;

  padding: 8px;
  background: rgba(47, 141, 255, 0.15);
  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;
}

/* ==================================================
   HEXAGON
   ================================================== */

.stone {
  --stone-color: #eaf7ff;

  position: relative;

  width: 64px;
  height: 64px;

  display: grid;
  place-items: center;

  color: var(--stone-color);

  /*
     OUTER HEXAGON BORDER
     intentionally thin + translucent
  */
  background: color-mix(in srgb, var(--stone-color) 42%, transparent);

  clip-path: polygon(25% 6.7%, 75% 6.7%, 100% 50%, 75% 93.3%, 25% 93.3%, 0 50%);

  /*
     glow around outside of hexagon
  */
  filter: drop-shadow(
      0 0 2px color-mix(in srgb, var(--stone-color) 60%, transparent)
    )
    drop-shadow(0 0 7px color-mix(in srgb, var(--stone-color) 35%, transparent));

  transition:
    transform 180ms ease,
    filter 180ms ease;
}

/* ==================================================
   DARK INTERIOR
   Creates thin outer border
   ================================================== */

.stone::before {
  content: "";

  position: absolute;
  inset: 1.5px;

  background: rgba(5, 15, 35, 0.95);

  clip-path: inherit;

  z-index: 0;
}

/* ==================================================
   SECOND INNER BORDER
   thinner + more transparent
   ================================================== */

.stone::after {
  content: "";

  position: absolute;
  inset: 7px;

  background: color-mix(in srgb, var(--stone-color) 22%, transparent);

  clip-path: inherit;

  filter: drop-shadow(
    0 0 2px color-mix(in srgb, var(--stone-color) 20%, transparent)
  );

  z-index: 1;
}

/* ==================================================
   CENTER OF HEXAGON
   text / img / svg / coded icon
   ================================================== */

.stone > span {
  position: relative;
  z-index: 2;

  width: 46px;
  height: 46px;

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

  overflow: hidden;

  clip-path: polygon(25% 6.7%, 75% 6.7%, 100% 50%, 75% 93.3%, 25% 93.3%, 0 50%);

  background: radial-gradient(
    circle,
    rgba(35, 82, 145, 0.18),
    rgba(5, 15, 35, 0.97) 72%
  );

  color: inherit;

  /*
     sized for 1–3 characters
  */
  font-size: 14px;
  font-weight: 600;
  line-height: 1;

  text-align: center;
  white-space: nowrap;

  text-shadow:
    0 0 4px color-mix(in srgb, var(--stone-color) 75%, transparent),
    0 0 8px color-mix(in srgb, var(--stone-color) 35%, transparent);
}

/* ==================================================
   IMAGE / SVG ICONS
   Automatically scale inside center
   ================================================== */

.stone img,
.stone svg {
  display: block;

  width: 60%;
  height: 60%;

  max-width: 100%;
  max-height: 100%;

  object-fit: contain;

  color: inherit;
}

.stone img {
  filter: drop-shadow(
    0 0 4px color-mix(in srgb, var(--stone-color) 45%, transparent)
  );
}

/* ==================================================
   COLOR CLASSES
   White is default
   ================================================== */

.stone.blue {
  --stone-color: #4b96ff;
}

.stone.cyan {
  --stone-color: #41dce9;
}

.stone.purple {
  --stone-color: #a768ff;
}

.stone.gold {
  --stone-color: #ffc461;
}

.stone.green {
  --stone-color: #65e5a0;
}

.stone.red {
  --stone-color: #ff6c80;
}

/* ==================================================
   STONE LABEL
   ================================================== */

.stones small {
  width: 72px;

  color: #d4dfeb;

  font-size: 10px;
  line-height: 1.2;

  text-align: center;
}

/* ==================================================
   HOVER / FOCUS
   ================================================== */

.stones button:hover .stone,
.stones button:focus-visible .stone {
  transform: translateY(-2px);

  filter: drop-shadow(0 0 3px var(--stone-color))
    drop-shadow(
      0 0 10px color-mix(in srgb, var(--stone-color) 50%, transparent)
    );
}

.stones button:focus-visible {
  outline: 1px solid var(--blue);
  outline-offset: 3px;
}

/* ==================================================
   VIEW ALL
   ================================================== */

.rosetta .view-all {
  display: block;

  margin-top: 5px;

  color: var(--blue);

  font-size: 11px;
  text-align: center;

  text-decoration: none;
}

.rosetta .view-all:hover,
.rosetta .view-all:focus-visible {
  color: white;
}
/* ==================================================
   8. PROJECT LIBRARY
   ================================================== */

.library {
  top: 49%;
  left: 4%;

  width: 34%;
  min-width: 420px;
}

/* ---------- PROJECT GRID ---------- */

.projects {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.projects > a {
  min-width: 0;

  padding: 10px 6px;

  display: grid;
  justify-items: center;
  gap: 5px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  background: rgba(47, 141, 255, 0.08);

  text-align: center;
}

.projects > a:hover,
.projects > a:focus-visible {
  background: rgba(47, 141, 255, 0.16);
}

/* ---------- PROJECT ICON ---------- */

.project-icon {
  --icon-color: #eaf7ff;

  width: 52px;
  height: 52px;

  display: grid;
  place-items: center;

  border: 1px solid color-mix(in srgb, var(--icon-color) 45%, transparent);

  border-radius: 9px;

  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--icon-color) 14%, transparent),
    rgba(5, 15, 35, 0.9) 70%
  );

  color: var(--icon-color);

  font-size: 13px;
  font-weight: 600;

  text-shadow: 0 0 7px var(--icon-color);

  box-shadow:
    inset 0 0 10px color-mix(in srgb, var(--icon-color) 10%, transparent),
    0 0 8px color-mix(in srgb, var(--icon-color) 18%, transparent);
}

/* image / svg support */

.project-icon img,
.project-icon svg {
  width: 65%;
  height: 65%;

  object-fit: contain;
}

/* ---------- ICON COLORS ---------- */

.project-icon.blue {
  --icon-color: #4b96ff;
}

.project-icon.cyan {
  --icon-color: #41dce9;
}

.project-icon.purple {
  --icon-color: #a768ff;
}

.project-icon.gold {
  --icon-color: #ffc461;
}

.project-icon.green {
  --icon-color: #65e5a0;
}

/* ---------- TEXT ---------- */

.projects strong {
  font-size: 11px;
  font-weight: 500;
  line-height: 1.15;
}

.projects small {
  color: #7890aa;

  font-size: 8px;
  letter-spacing: 0.04em;
}

/* ---------- VIEW ALL ---------- */

.library .view-all {
  display: block;

  margin-top: 10px;

  color: var(--blue);

  font-size: 11px;
  text-align: center;
}

.library .view-all:hover,
.library .view-all:focus-visible {
  color: white;
}
/* ==================================================
   9. REFERENCE GUIDES
   ================================================== */

.guides {
  top: 38%;
  right: 4%;

  width: 30%;
  min-width: 420px;
}

/* ---------- HORIZONTAL LIST ---------- */

.guide-list {
  display: flex;
  gap: 10px;

  overflow-x: auto;
  overflow-y: hidden;

  padding: 8px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  scrollbar-width: thin;
  scrollbar-color: rgba(95, 200, 255, 0.25) transparent;
}

.guide-list::-webkit-scrollbar {
  height: 4px;
}

.guide-list::-webkit-scrollbar-thumb {
  background: rgba(95, 200, 255, 0.25);
  border-radius: 9px;
}

/* ---------- GUIDE ITEM ---------- */

.guide-list > a {
  flex: 0 0 76px;

  display: grid;
  justify-items: center;
  gap: 7px;

  padding: 8px 5px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  background: rgba(47, 141, 255, 0.08);

  text-align: center;
}

.guide-list > a:hover,
.guide-list > a:focus-visible {
  background: rgba(47, 141, 255, 0.16);
}

/* ---------- SQUARE ICON ---------- */

.guide-icon {
  --icon-color: #eaf7ff;

  width: 48px;
  height: 48px;

  display: grid;
  place-items: center;

  border: 1px solid color-mix(in srgb, var(--icon-color) 45%, transparent);

  border-radius: 7px;

  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--icon-color) 18%, transparent),
    rgba(5, 15, 35, 0.9)
  );

  color: var(--icon-color);

  font-size: 11px;
  font-weight: 700;

  text-shadow: 0 0 6px var(--icon-color);

  box-shadow:
    inset 0 0 10px color-mix(in srgb, var(--icon-color) 10%, transparent),
    0 0 8px color-mix(in srgb, var(--icon-color) 18%, transparent);
}

/* ---------- IMG / SVG ---------- */

.guide-icon img,
.guide-icon svg {
  width: 60%;
  height: 60%;

  object-fit: contain;
}

/* ---------- ICON COLORS ---------- */

.guide-icon.blue {
  --icon-color: #4b96ff;
}

.guide-icon.cyan {
  --icon-color: #41dce9;
}

.guide-icon.purple {
  --icon-color: #a768ff;
}

.guide-icon.gold {
  --icon-color: #ffc461;
}

.guide-icon.red {
  --icon-color: #ff6c80;
}

.guide-icon.green {
  --icon-color: #65e5a0;
}

/* ---------- LABEL ---------- */

.guide-list small {
  color: #d4dfeb;

  font-size: 9px;
  line-height: 1.2;
}

/* ---------- VIEW ALL ---------- */

.guides .view-all {
  display: block;

  margin-top: 8px;

  color: var(--blue);

  font-size: 11px;
  text-align: center;
}

.guides .view-all:hover,
.guides .view-all:focus-visible {
  color: white;
}
/* ==================================================
   10. DATA SCIENCE
   ================================================== */

.data {
  top: 62%;
  right: 4%;

  width: 30%;
  min-width: 420px;
}

/* ---------- HORIZONTAL LIST ---------- */

.data-list {
  display: flex;
  gap: 10px;

  overflow-x: auto;
  overflow-y: hidden;

  padding: 8px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  scrollbar-width: thin;
  scrollbar-color: rgba(95, 200, 255, 0.25) transparent;
}

.data-list::-webkit-scrollbar {
  height: 4px;
}

.data-list::-webkit-scrollbar-thumb {
  background: rgba(95, 200, 255, 0.25);
  border-radius: 9px;
}

/* ---------- TOPIC ---------- */

.data-list > a {
  flex: 0 0 82px;

  display: grid;
  justify-items: center;
  gap: 7px;

  padding: 8px 5px;

  border: 1px solid rgba(95, 170, 255, 0.2);
  border-radius: 9px;

  background: rgba(47, 141, 255, 0.08);

  text-align: center;
}

.data-list > a:hover,
.data-list > a:focus-visible {
  background: rgba(47, 141, 255, 0.16);
}

/* ---------- ICON ---------- */

.data-icon {
  --icon-color: #eaf7ff;

  width: 48px;
  height: 48px;

  display: grid;
  place-items: center;

  border: 1px solid color-mix(in srgb, var(--icon-color) 40%, transparent);

  border-radius: 9px;

  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--icon-color) 16%, transparent),
    rgba(5, 15, 35, 0.9) 72%
  );

  color: var(--icon-color);

  font-size: 12px;
  font-weight: 700;

  text-shadow: 0 0 6px var(--icon-color);

  box-shadow:
    inset 0 0 10px color-mix(in srgb, var(--icon-color) 10%, transparent),
    0 0 8px color-mix(in srgb, var(--icon-color) 18%, transparent);
}

/* image / svg */

.data-icon img,
.data-icon svg {
  width: 60%;
  height: 60%;

  object-fit: contain;

  color: inherit;
}

/* ---------- COLORS ---------- */

.data-icon.blue {
  --icon-color: #4b96ff;
}

.data-icon.cyan {
  --icon-color: #41dce9;
}

.data-icon.purple {
  --icon-color: #a768ff;
}

.data-icon.gold {
  --icon-color: #ffc461;
}

.data-icon.green {
  --icon-color: #65e5a0;
}

.data-icon.red {
  --icon-color: #ff6c80;
}

/* ---------- LABEL ---------- */

.data-list small {
  color: #d4dfeb;

  font-size: 9px;
  line-height: 1.25;
}

/* ---------- VIEW ALL ---------- */

.data .view-all {
  display: block;

  margin-top: 8px;

  color: var(--blue);

  font-size: 11px;
  text-align: center;
}

.data .view-all:hover,
.data .view-all:focus-visible {
  color: white;
}