@import url("https://fonts.googleapis.com/css2?family=Bad+Script&family=Caveat:wght@500&family=Comforter&family=Comforter+Brush&family=Great+Vibes&family=Manrope:wght@400;500;600&family=Marck+Script&family=Prata&display=swap");

:root {
  color-scheme: dark;
  --glow: #ff9cc2;
  --sway: 2.4deg;
  --sky-image: url("assets/fon-1.jpg");
  --sky-opacity: 0.7;
  --title-font: "Great Vibes";
  /* тёмный оттенок цвета свечения, полупрозрачный — для надписей поверх ядра */
  --ink-dark: color-mix(in srgb, var(--glow) 14%, #000);
  /* перелив надписей: глубокий, яркий и светлый оттенки цвета свечения */
  --txt-deep: oklch(from var(--glow) 0.42 calc(c * 1.9) h / 0.92);
  --txt-vivid: oklch(from var(--glow) 0.64 calc(c * 2) h / 0.92);
  --txt-bright: oklch(from var(--glow) 0.9 calc(c * 0.8) h / 0.95);
  --ink: #f7f4ee;
  --muted: #b4ada1;
  --glass: rgba(14, 13, 11, 0.7);
  --line: rgba(255, 248, 230, 0.14);
  --accent: #f1d9a0;
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  background: #000;
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  background: #000;
}

/* фоновый рисунок: медленно наплывает, звезда светит поверх него */
.sky {
  position: fixed;
  inset: -6%;
  background: var(--sky-image) center / cover no-repeat;
  opacity: var(--sky-opacity);
  animation: sky-drift 90s ease-in-out infinite alternate;
}

@keyframes sky-drift {
  to {
    transform: scale(1.12) rotate(1.5deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .sky {
    animation: none;
  }
}

/* режим «экран»: чёрное на холсте прозрачно, свечение подсвечивает рисунок */
.star {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  mix-blend-mode: screen;
}

/* ---------- запаска без WebGL2 ---------- */

.star-fallback {
  display: none;
}

.no-gl .star {
  display: none;
}

.no-gl .star-fallback {
  position: fixed;
  inset: 0;
  display: block;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #fff 0 1%, color-mix(in srgb, var(--glow, #ffdc9a) 85%, transparent) 2.5%, color-mix(in srgb, var(--glow, #ffdc9a) 28%, transparent) 8%, color-mix(in srgb, var(--glow, #ffdc9a) 8%, transparent) 18%, transparent 36%), #000;
}

.no-gl .star-fallback::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 90vmin;
  height: 90vmin;
  content: "";
  translate: -50% -50%;
  background: repeating-conic-gradient(from 0deg, rgba(255, 240, 205, 0.5) 0deg 0.6deg, transparent 1.4deg 11deg);
  mask: radial-gradient(circle, #000 2%, transparent 50%);
  animation: fallback-spin 90s linear infinite;
}

.no-gl .star-fallback {
  mix-blend-mode: screen;
}

@keyframes fallback-spin {
  to {
    rotate: 360deg;
  }
}

/* ---------- текст по центру, поверх ядра ---------- */

.stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  user-select: none;
}

.stage[hidden] {
  display: none;
}

/* заголовок с подписью мягко качаются маятником вокруг центра надписи */
.title-block {
  transform-origin: 50% 45%;
  animation: sway 7s ease-in-out infinite;
}

@keyframes sway {
  0%,
  100% {
    rotate: calc(var(--sway) * -1);
  }

  50% {
    rotate: var(--sway);
  }
}

@media (prefers-reduced-motion: reduce) {
  .title-block {
    animation: none;
  }
}

/* все надписи лежат на светлом свечении — тёмные полупрозрачные, без теней */
.stage h1 {
  /* поля под росчерки рукописного шрифта: иначе градиент их обрежет */
  margin: -0.18em -0.4em;
  padding: 0.18em 0.4em;
  font-family: var(--title-font), "Prata", Georgia, serif;
  font-size: clamp(3rem, 10vw, 7.5rem);
  font-weight: 400;
  line-height: 1.15;
  color: color-mix(in srgb, var(--ink-dark) 78%, transparent);
}

.stage p {
  margin: 0;
}

.stage .tagline {
  margin-top: 0.4rem;
  font-size: clamp(0.75rem, 1.1vw, 0.9rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--ink-dark) 72%, transparent);
}

.stage .status {
  margin-top: clamp(2.5rem, 7vh, 4.5rem);
  font-size: clamp(0.75rem, 1vw, 0.85rem);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--ink-dark) 72%, transparent);
}

.stage .soon {
  margin-top: 0.5rem;
  font-family: "Prata", Georgia, serif;
  font-size: clamp(1.1rem, 1.9vw, 1.45rem);
  letter-spacing: -0.01em;
  color: color-mix(in srgb, var(--ink-dark) 78%, transparent);
}

/* перелив: блик из оттенков цвета свечения бежит по буквам, строка за строкой */
@supports ((background-clip: text) or (-webkit-background-clip: text)) and (color: oklch(from red l c h)) {
  .stage h1,
  .stage p {
    color: transparent;
    background-image: linear-gradient(90deg, var(--txt-deep) 0%, var(--txt-vivid) 18%, var(--txt-bright) 27%, var(--txt-vivid) 36%, var(--txt-deep) 52%, var(--ink-dark) 74%, var(--txt-deep) 100%);
    background-size: 200% 100%;
    background-repeat: repeat-x;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: text-shimmer 6s linear infinite;
  }

  .stage .tagline {
    animation-delay: 0.3s;
  }

  .stage .status {
    animation-delay: 0.6s;
  }

  .stage .soon {
    animation-delay: 0.9s;
  }
}

@keyframes text-shimmer {
  from {
    background-position: 200% 50%;
  }

  to {
    background-position: 0% 50%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .stage h1,
  .stage p {
    animation: none;
  }
}

/* ---------- панель ---------- */

.panel {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 2;
  width: min(300px, calc(100vw - 32px));
  max-height: calc(100svh - 32px);
  overflow-y: auto;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 13px;
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.panel-head strong {
  font-weight: 600;
  letter-spacing: 0.01em;
}

.panel.is-collapsed {
  width: auto;
}

.panel.is-collapsed .panel-body,
.panel.is-collapsed .panel-head strong {
  display: none;
}

.panel-body {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.group {
  margin: 6px 0 -2px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.group:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-row input[type="color"] {
  width: 44px;
  height: 32px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.color-row output {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.channel-r input {
  accent-color: #ff6b6b;
}

.channel-g input {
  accent-color: #5fd68a;
}

.channel-b input {
  accent-color: #6ba8ff;
}

.swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.swatch {
  width: 26px;
  min-height: 26px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--c);
}

.swatch:hover {
  background: var(--c);
  transform: scale(1.1);
}

.range {
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 4px;
  color: var(--muted);
}

.range output {
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.range input {
  grid-column: 1 / -1;
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin: 0;
  padding: 0;
  border: 0;
}

.segmented legend {
  margin-bottom: 6px;
  padding: 0;
  color: var(--muted);
}

.segmented label {
  position: relative;
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  display: grid;
  min-height: 30px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  cursor: pointer;
}

.segmented input:checked + span {
  border-color: var(--accent);
  color: var(--ink);
  background: rgba(241, 217, 160, 0.12);
}

.segmented input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.select {
  display: grid;
  gap: 4px;
  color: var(--muted);
}

.select select {
  min-height: 32px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  color: var(--ink);
  background: rgba(255, 248, 230, 0.08);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.check input {
  margin: 0;
  accent-color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

button {
  min-height: 32px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font: inherit;
  font-weight: 500;
  color: var(--ink);
  background: rgba(255, 248, 230, 0.08);
  cursor: pointer;
}

button:hover {
  background: rgba(255, 248, 230, 0.14);
}

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button.ghost {
  min-height: 28px;
  padding: 0 9px;
  font-size: 12px;
  background: transparent;
}

.hint,
.stats {
  margin: 0;
  font-size: 12px;
  line-height: 1.4;
  color: var(--muted);
}

.stats {
  font-variant-numeric: tabular-nums;
  opacity: 0.8;
}

@media (max-width: 560px) {
  .panel {
    right: 16px;
    width: auto;
  }
}