:root {
  color-scheme: light dark;
  --background-fallback: #050818;
  --text-color: #ffffff;
  --accent-color: #f9d423;
  --button-color: #1a2350;
  --glass-bg: rgba(10, 16, 35, 0.48);
  --glass-stroke: rgba(255, 255, 255, 0.12);
  --font-main: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-main);
  background: radial-gradient(circle at 20% 10%, rgba(249, 212, 67, 0.14), transparent 55%),
    radial-gradient(circle at 80% -10%, rgba(193, 118, 255, 0.18), transparent 55%),
    linear-gradient(150deg, rgba(3, 8, 27, 0.96), rgba(6, 18, 55, 0.94) 45%, rgba(24, 14, 50, 0.9));
  color: var(--text-color);
  text-transform: uppercase;
  padding: clamp(18px, 4vw, 42px);
}

.hero {
  width: min(94vw, 1080px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(18px, 4vw, 48px);
  text-align: center;
}

.hero h1 {
  width: 100%;
  font-size: clamp(3.6rem, 12vw, 8.2rem);
  letter-spacing: clamp(0.35em, 1.8vw, 0.6em);
  margin: 0;
  line-height: 1.1;
  text-shadow: rgba(0, 0, 0, 0.45) 0 22px 38px;
}

.collage {
  width: 100%;
  padding: clamp(14px, 3vw, 34px);
  border-radius: clamp(20px, 3vw, 34px);
  background: var(--glass-bg);
  border: 1px solid var(--glass-stroke);
  backdrop-filter: blur(8px);
  box-shadow: rgba(5, 7, 21, 0.55) 0 32px 70px;
}

.collage__grid {
  position: relative;
  width: 100%;
  margin: 0 auto;
  height: clamp(360px, 58vw, 560px);
}

.collage__item {
  margin: 0;
  position: absolute;
  top: var(--collage-top, 50%);
  left: var(--collage-left, 50%);
  width: calc(var(--collage-width, clamp(150px, 16vw, 240px)) * var(--collage-scale, 1));
  aspect-ratio: var(--collage-ratio, 3 / 4);
  transform: translate(-50%, -50%) rotate(var(--collage-rot, 0deg));
  border-radius: clamp(12px, 1.8vw, 22px);
  overflow: hidden;
  cursor: pointer;
  box-shadow: rgba(0, 0, 0, 0.38) 0 22px 44px;
  transition: transform 0.45s ease, box-shadow 0.45s ease, z-index 0.2s ease;
  isolation: isolate;
  z-index: var(--collage-z, 2);
  --collage-scale: 1;
}

.collage__item:focus-visible {
  outline: 3px solid rgba(249, 212, 67, 0.9);
  outline-offset: 6px;
}

.collage__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: inherit;
  filter: saturate(1.18) contrast(0.95);
  transition: transform 0.45s ease;
}

.collage__item::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(190deg, rgba(3, 6, 17, 0) 45%, rgba(3, 6, 17, 0.5));
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.collage__item:hover,
.collage__item:focus,
.collage__item:focus-visible,
.collage__item:focus-within {
  transform: translate(-50%, -50%) scale(1.45) rotate(calc(var(--collage-rot, 0deg) + 1.5deg)) rotate3d(1, -1, 0, 10deg);
  z-index: 15;
  box-shadow: rgba(0, 0, 0, 0.72) 0 45px 90px;
}

.collage__item:hover img,
.collage__item:focus img,
.collage__item:focus-visible img,
.collage__item:focus-within img {
  transform: scale(1.18);
}

.collage__item:hover::after,
.collage__item:focus::after,
.collage__item:focus-visible::after,
.collage__item:focus-within::after {
  opacity: 1;
}

.collage__item:nth-child(1) {
  --collage-top: 48%;
  --collage-left: 18%;
  --collage-width: clamp(170px, 19vw, 250px);
  --collage-rot: -11deg;
  --collage-z: 8;
}

.collage__item:nth-child(2) {
  --collage-top: 30%;
  --collage-left: 40%;
  --collage-width: clamp(160px, 18vw, 240px);
  --collage-rot: 6deg;
  --collage-z: 9;
}

.collage__item:nth-child(3) {
  --collage-top: 60%;
  --collage-left: 44%;
  --collage-width: clamp(150px, 17vw, 230px);
  --collage-rot: -5deg;
  --collage-z: 10;
}

.collage__item:nth-child(4) {
  --collage-top: 32%;
  --collage-left: 63%;
  --collage-width: clamp(170px, 20vw, 260px);
  --collage-rot: -3deg;
  --collage-ratio: 5 / 4;
  --collage-z: 6;
}

.collage__item:nth-child(5) {
  --collage-top: 72%;
  --collage-left: 26%;
  --collage-width: clamp(165px, 19vw, 250px);
  --collage-rot: 9deg;
  --collage-z: 7;
}

.collage__item:nth-child(6) {
  --collage-top: 72%;
  --collage-left: 62%;
  --collage-width: clamp(150px, 17vw, 230px);
  --collage-rot: -8deg;
  --collage-z: 4;
}

.collage__item:nth-child(7) {
  --collage-top: 20%;
  --collage-left: 26%;
  --collage-width: clamp(140px, 16vw, 220px);
  --collage-rot: 4deg;
  --collage-z: 5;
}

.collage__item:nth-child(8) {
  --collage-top: 82%;
  --collage-left: 46%;
  --collage-width: clamp(150px, 17vw, 230px);
  --collage-rot: -2deg;
  --collage-z: 3;
}

.collage__item:nth-child(9) {
  --collage-top: 42%;
  --collage-left: 82%;
  --collage-width: clamp(160px, 18vw, 240px);
  --collage-rot: 7deg;
  --collage-z: 8;
}

.collage__item:nth-child(10) {
  --collage-top: 64%;
  --collage-left: 78%;
  --collage-width: clamp(150px, 17vw, 230px);
  --collage-rot: -6deg;
  --collage-ratio: 4 / 3;
  --collage-z: 5;
}

.collage__item:nth-child(11) {
  --collage-top: 18%;
  --collage-left: 86%;
  --collage-width: clamp(140px, 16vw, 210px);
  --collage-rot: -2deg;
  --collage-z: 4;
}

.collage__item:nth-child(12) {
  --collage-top: 52%;
  --collage-left: 12%;
  --collage-width: clamp(140px, 16vw, 210px);
  --collage-rot: 7deg;
  --collage-z: 6;
}

.collage__item:nth-child(13) {
  --collage-top: 34%;
  --collage-left: 8%;
  --collage-width: clamp(150px, 17vw, 230px);
  --collage-rot: -5deg;
  --collage-z: 5;
}

.hero__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 1.5vw, 16px) clamp(36px, 5vw, 48px);
  font-size: clamp(0.95rem, 1.2vw, 1.15rem);
  letter-spacing: clamp(0.08em, 0.5vw, 0.12em);
  border: none;
  border-radius: 999px;
  background: var(--accent-color);
  color: var(--button-color);
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  box-shadow: rgba(0, 0, 0, 0.35) 0 16px 28px;
  text-transform: uppercase;
}

.hero__button:focus,
.hero__button:hover {
  outline: 0;
  transform: translateY(-4px);
  background: #ffe866;
  box-shadow: rgba(0, 0, 0, 0.45) 0 22px 34px;
}

.helper-text {
  margin: 0;
  text-transform: none;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.25s ease, max-height 0.25s ease;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.85);
}

.helper-text.visible {
  opacity: 1;
  max-height: 120px;
}

.kbd {
  display: inline-block;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  padding: 2px 10px;
  font-size: 0.85rem;
  margin: 0 3px;
  background: rgba(9, 12, 31, 0.55);
  text-transform: uppercase;
}

@media (max-width: 960px) {
  .collage__grid {
    height: clamp(340px, 65vw, 520px);
  }
}

@media (max-width: 720px) {
  body {
    padding: clamp(18px, 6vw, 32px);
  }

  .collage__grid {
    height: clamp(420px, 135vw, 640px);
  }

  .collage__item {
    --collage-scale: 0.72;
  }

  .collage__item:hover,
  .collage__item:focus,
  .collage__item:focus-visible,
  .collage__item:focus-within {
    transform: translate(-50%, -50%) scale(1.25) rotate(calc(var(--collage-rot, 0deg) + 1deg)) rotate3d(1, -1, 0, 8deg);
  }
}

@media (pointer: coarse) {
  .collage__item:hover,
  .collage__item:focus,
  .collage__item:focus-visible,
  .collage__item:focus-within {
    box-shadow: rgba(0, 0, 0, 0.55) 0 26px 50px;
  }
}