:root {
  --bg: oklch(0.79 0.125 58);
  --ink: oklch(0.22 0.02 50);
  --ink-soft: oklch(0.3 0.035 50);
  --cream: oklch(0.975 0.012 85);

  /* Keycap plastics: top face, top face falloff, side wall, bottom edge */
  --cream-top: oklch(0.975 0.012 85);
  --cream-top-2: oklch(0.925 0.018 82);
  --cream-side: oklch(0.87 0.024 78);
  --cream-edge: oklch(0.72 0.04 68);
  --dark-top: oklch(0.34 0.022 50);
  --dark-top-2: oklch(0.27 0.02 50);
  --dark-side: oklch(0.23 0.018 50);
  --dark-edge: oklch(0.15 0.014 50);
  --shadow: oklch(0.45 0.12 45 / 0.55);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: clamp(20px, 5vw, 72px);

  color-scheme: light;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Archivo", system-ui, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 1fr auto auto;
  grid-template-areas: "stage" "ghost" "bottom";
  gap: 56px;
  padding: var(--gutter);
}

@media (min-width: 1200px) {
  .page {
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-rows: 1fr auto;
    grid-template-areas: "stage ghost" "bottom bottom";
  }
}

.stage {
  grid-area: stage;
  align-self: center;
}

/* The three lines share one grid cell, so swapping them never moves the keys */

.kicker {
  display: grid;
  align-items: end;
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  font-weight: 600;
  animation: fade 0.8s var(--ease-out) 0.1s both;
}

.kicker > span {
  grid-area: 1 / 1;
}

.kicker__build,
.kicker__done {
  visibility: hidden;
}

/* Keys */

.keys {
  --size: clamp(76px, 22vw, 172px);

  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 22px);
}

.plus {
  font-size: calc(var(--size) * 0.32);
  font-weight: 500;
  line-height: 1;
  translate: 0 -8%;
  animation: fade 0.6s var(--ease-out) 0.6s both;
}

.key {
  --top: var(--cream-top);
  --top-2: var(--cream-top-2);
  --side: var(--cream-side);
  --edge: var(--cream-edge);
  --legend: var(--ink);
  --lift: calc(var(--size) * 0.075);

  position: relative;
  flex: none;
  width: calc(var(--size) * var(--u, 1));
  height: var(--size);
  border-radius: calc(var(--size) * 0.21);
  background: var(--side);
  box-shadow:
    0 var(--lift) 0 var(--edge),
    0 calc(var(--lift) * 2.2) calc(var(--lift) * 2.6) var(--shadow);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    transform 0.16s var(--ease-out),
    box-shadow 0.16s var(--ease-out);
  animation: drop 0.9s var(--ease-out) both;
  animation-delay: calc(0.15s + var(--i) * 0.14s);
}

.key--dark {
  --top: var(--dark-top);
  --top-2: var(--dark-top-2);
  --side: var(--dark-side);
  --edge: var(--dark-edge);
  --legend: var(--cream);
}

.key input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.key__top {
  position: absolute;
  inset: calc(var(--size) * 0.05) calc(var(--size) * 0.1) calc(var(--size) * 0.16);
  display: flex;
  align-items: flex-end;
  padding: 0 0 calc(var(--size) * 0.1) calc(var(--size) * 0.12);
  border-radius: calc(var(--size) * 0.16);
  background: radial-gradient(130% 100% at 50% 15%, var(--top) 40%, var(--top-2));
  box-shadow: inset 0 1px 0 oklch(0.99 0.01 85 / 0.35);
}

.key__legend {
  color: var(--legend);
  font-size: calc(var(--size) * 0.15);
  font-weight: 600;
  font-stretch: 112%;
  line-height: 1;
}

.key--dark .key__legend {
  font-weight: 700;
}

@media (hover: hover) {
  .key:hover {
    transform: translateY(-2px);
  }
}

.key:active {
  transform: translateY(calc(var(--lift) * 0.8));
}

.key:has(input:checked) {
  transform: translateY(var(--lift));
  box-shadow:
    0 0 0 var(--edge),
    0 calc(var(--lift) * 0.6) var(--lift) var(--shadow);
}

.key:has(input:focus-visible) {
  outline: 3px solid var(--ink);
  outline-offset: 6px;
}

/* = ilovangiz */

.result {
  display: flex;
  gap: 0.28em;
  margin: clamp(32px, 4.5vw, 56px) 0 0;
  font-size: clamp(2.6rem, 0.4rem + 11vw, 9rem);
  font-weight: 800;
  font-stretch: 112%;
  line-height: 0.9;
  letter-spacing: -0.03em;
  animation: fade 0.9s var(--ease-out) 0.75s both;
}

.result__eq {
  font-weight: 500;
}

.result__name {
  padding-inline: 0.04em;
  background: linear-gradient(var(--cream), var(--cream)) no-repeat 0 76% / 0% 22%;
}

/* The keyboard that types by itself: the AI key fires, the code keys follow */

.ghost {
  --size: clamp(52px, 14vw, 78px);
  --cycle: 3.4s;
  --start: 1.6s;

  grid-area: ghost;
  align-self: center;
  justify-self: start;
  display: grid;
  grid-template-columns: repeat(4, var(--size));
  gap: calc(var(--size) * 0.16);
  rotate: -6deg;
  animation: fade 1s var(--ease-out) 1.1s both;
}

@media (min-width: 1200px) {
  .ghost {
    --size: clamp(52px, 4.6vw, 78px);

    justify-self: center;
  }
}

.key--ghost {
  --legend: var(--ink-soft);

  width: auto;
  cursor: default;
  pointer-events: none;
  animation: type var(--cycle) linear infinite;
  animation-delay: calc(var(--start) + var(--t, 0s));
}

.key--ghost .key__top {
  align-items: center;
  justify-content: center;
  gap: calc(var(--size) * 0.07);
  padding: 0;
}

.key--ghost .key__legend {
  font-size: calc(var(--size) * 0.26);
}

.key--idle {
  animation: none;
}

.key--ai,
.key--wide {
  grid-column: span 2;
}

.key--ai {
  --legend: var(--cream);
}

.key--ai .key__top {
  overflow: hidden;
}

.key--ai .key__top::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 45%, oklch(0.8 0.15 58 / 0.6), transparent 70%);
  opacity: 0;
  animation: glow var(--cycle) linear var(--start) infinite;
}

.spark {
  position: relative;
  z-index: 1;
  width: calc(var(--size) * 0.3);
  fill: var(--cream);
  animation: spin var(--cycle) var(--ease-out) var(--start) infinite;
}

.key--ai .key__legend {
  position: relative;
  z-index: 1;
}

/* Bottom row */

.bottom {
  grid-area: bottom;
  display: grid;
  gap: 16px;
  align-items: end;
  animation: fade 0.8s var(--ease-out) 0.9s both;
}

@media (min-width: 820px) {
  .bottom {
    grid-template-columns: 1fr minmax(0, 38ch);
  }
}

.bottom p {
  margin: 0;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.status::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  animation: pulse 2.2s var(--ease-out) 2s infinite;
}

.about {
  color: var(--ink-soft);
  font-size: 1.0625rem;
  line-height: 1.55;
}

/* Both keys pressed: a build bar runs across the top, then the answer */

.page::after {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  height: 5px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}

.page:has(#k-idea:checked):has(#k-stets:checked)::after {
  animation: build 1.3s var(--ease-out) both;
}

.page:has(#k-idea:checked):has(#k-stets:checked) .kicker__idle {
  visibility: hidden;
}

.page:has(#k-idea:checked):has(#k-stets:checked) .kicker__build {
  animation: building 1.1s steps(1) both;
}

.page:has(#k-idea:checked):has(#k-stets:checked) .kicker__done {
  visibility: visible;
  animation: fade 0.6s var(--ease-out) 1.1s both;
}

.page:has(#k-idea:checked):has(#k-stets:checked) .result__name {
  background-size: 100% 22%;
  transition: background-size 0.7s var(--ease-out) 1.1s;
}

/* Motion */

@keyframes drop {
  from {
    opacity: 0;
    translate: 0 -48px;
  }
}

@keyframes fade {
  from {
    opacity: 0;
    translate: 0 14px;
  }
}

@keyframes build {
  0% {
    transform: scaleX(0);
    opacity: 1;
  }
  80% {
    transform: scaleX(1);
    opacity: 1;
  }
  100% {
    transform: scaleX(1);
    opacity: 0;
  }
}

@keyframes building {
  0% {
    visibility: visible;
  }
  100% {
    visibility: hidden;
  }
}

@keyframes type {
  0%,
  10%,
  100% {
    transform: translateY(0);
    box-shadow:
      0 var(--lift) 0 var(--edge),
      0 calc(var(--lift) * 2.2) calc(var(--lift) * 2.6) var(--shadow);
  }
  3% {
    transform: translateY(var(--lift));
    box-shadow:
      0 0 0 var(--edge),
      0 calc(var(--lift) * 0.6) var(--lift) var(--shadow);
  }
}

@keyframes glow {
  0% {
    opacity: 0;
  }
  4% {
    opacity: 1;
  }
  45%,
  100% {
    opacity: 0;
  }
}

/* A four-point star is symmetric at 90°, so the loop is seamless */
@keyframes spin {
  from {
    rotate: 0deg;
  }
  20%,
  to {
    rotate: 90deg;
  }
}

@keyframes pulse {
  from {
    box-shadow: 0 0 0 0 oklch(0.22 0.02 50 / 0.45);
  }
  to {
    box-shadow: 0 0 0 10px oklch(0.22 0.02 50 / 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
}