@import url("./theme.css");

/* ——— база ——— */

html,
body {
  height: 100%;
  margin: 0;
  background: var(--ksiom-paper);
  color: var(--ksiom-ink);
  overflow: hidden;
}

/* ——— оболочка ——— */

.app-shell {
  height: 100vh;
  min-height: 100vh;
}

/* ——— шапка в палитре kl.ksiom.ru ——— */

.app-header {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  height: var(--ksiom-header-h);
  min-height: var(--ksiom-header-h);
  max-height: var(--ksiom-header-h);
  background:
    radial-gradient(ellipse 55% 120% at 18% 40%, var(--ksiom-green-a-18), transparent 70%),
    radial-gradient(ellipse 50% 110% at 82% 55%, var(--ksiom-red-a-12), transparent 72%),
    radial-gradient(ellipse 60% 100% at 50% 0%, var(--ksiom-blue-a-14), transparent 65%),
    linear-gradient(180deg, #ffffff 0%, var(--ksiom-paper) 55%, var(--ksiom-pink) 140%);
  border-bottom: none;
  z-index: 10;
  overflow: hidden;
  isolation: isolate;
}

.header-cornice {
  position: absolute;
  left: var(--ksiom-header-pad-x);
  right: var(--ksiom-header-pad-x);
  top: clamp(0.35rem, 1.1vh, 0.7rem);
  height: 0;
  pointer-events: none;
  z-index: 2;
}

.header-cornice::before,
.header-cornice::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
}

.header-cornice::before {
  top: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--ksiom-green) 12%,
    var(--ksiom-blue) 38%,
    var(--ksiom-steel) 50%,
    var(--ksiom-blue) 62%,
    var(--ksiom-red) 88%,
    transparent 100%
  );
  opacity: 0.55;
}

.header-cornice::after {
  top: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--ksiom-gray-line) 15%,
    var(--ksiom-steel) 50%,
    var(--ksiom-gray-line) 85%,
    transparent 100%
  );
  opacity: 0.7;
}

.header-cornice-jewel {
  position: absolute;
  left: 50%;
  top: -3px;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border: 1.5px solid var(--ksiom-blue);
  background: linear-gradient(135deg, var(--ksiom-yellow), var(--ksiom-green));
  transform: rotate(45deg);
  box-shadow:
    0 0 0 3px var(--ksiom-paper),
    -18px 0 0 -2px var(--ksiom-green),
    18px 0 0 -2px var(--ksiom-red);
}

.header-spacetime {
  position: absolute;
  inset: 0 0 var(--ksiom-vyaz-h) 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
  mix-blend-mode: multiply;
  mask-image: radial-gradient(
    ellipse 70% 90% at 50% 45%,
    #000 0%,
    #000 35%,
    transparent 78%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 70% 90% at 50% 45%,
    #000 0%,
    #000 35%,
    transparent 78%
  );
}

.header-spacetime img,
.header-spacetime svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.header-brand {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  align-items: center;
  padding:
    clamp(0.9rem, 2.4vh, 1.5rem)
    var(--ksiom-header-pad-x)
    calc(var(--ksiom-vyaz-h) * 0.55);
  animation: brand-rise 720ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes brand-rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.brand-cluster {
  display: inline-flex;
  align-items: center;
  gap: clamp(0.75rem, 2.2vw, 1.75rem);
  text-decoration: none;
  color: var(--ksiom-blue);
  transition: opacity 180ms ease, filter 220ms ease;
}

.brand-cluster:hover,
.brand-cluster:focus-visible {
  color: var(--ksiom-steel);
  opacity: var(--ksiom-brand-hover-opacity);
}

.brand-cluster:hover .brand-mark,
.brand-cluster:focus-visible .brand-mark {
  transform: translateY(-1px);
}

.brand-cartouche {
  display: block;
  height: var(--ksiom-cartouche-h);
  width: auto;
  flex: 0 0 auto;
  opacity: 0.95;
  transition: opacity 180ms ease, transform 280ms ease, filter 220ms ease;
  filter: drop-shadow(0 0 0 transparent);
}

.brand-cartouche--right {
  transform: scaleX(-1);
}

.brand-cluster:hover .brand-cartouche,
.brand-cluster:focus-visible .brand-cartouche {
  opacity: 1;
  filter: drop-shadow(0 0 4px var(--ksiom-green-a-18));
}

.brand-mark-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.brand-mark {
  display: block;
  height: var(--ksiom-brand-h);
  width: auto;
  max-width: var(--ksiom-brand-max-w);
  color: inherit;
  overflow: visible;
  filter: drop-shadow(0 1px 0 color-mix(in srgb, var(--ksiom-paper) 80%, transparent));
  transition: transform 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.brand-mark-ember {
  pointer-events: none;
}

.brand-mark-ember path {
  stroke: var(--ksiom-red);
  stroke-dasharray: 0.07 0.93;
  stroke-dashoffset: 0;
  animation: brand-ember-run 2.4s linear infinite;
}

.brand-mark-ember path:nth-child(1) { animation-delay: 0s; }
.brand-mark-ember path:nth-child(2) { animation-delay: 0.48s; }
.brand-mark-ember path:nth-child(3) { animation-delay: 0.96s; }
.brand-mark-ember path:nth-child(4) { animation-delay: 1.44s; }
.brand-mark-ember path:nth-child(5) { animation-delay: 1.92s; }

@keyframes brand-ember-run {
  to {
    stroke-dashoffset: -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand-mark-ember path {
    animation: none;
    stroke-dasharray: none;
    opacity: 0.35;
  }
}

.brand-underline {
  display: block;
  width: min(78%, 12rem);
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(
    90deg,
    var(--ksiom-green) 0%,
    var(--ksiom-steel) 28%,
    var(--ksiom-blue) 50%,
    var(--ksiom-red) 78%,
    var(--ksiom-yellow) 100%
  );
  box-shadow: 0 1px 0 color-mix(in srgb, var(--ksiom-navy) 12%, transparent);
  position: relative;
}

.brand-underline::before,
.brand-underline::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 0 2px var(--ksiom-paper);
}

.brand-underline::before {
  left: 8%;
  background: var(--ksiom-green);
}

.brand-underline::after {
  right: 8%;
  background: var(--ksiom-red);
}

/* Нижний цветной фриз */
.header-vyaz {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--ksiom-vyaz-h);
  pointer-events: none;
  z-index: 3;
  background-color: color-mix(in srgb, var(--ksiom-paper) 88%, var(--ksiom-pink));
  background-image:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--ksiom-paper) 75%, transparent) 0%,
      transparent 50%
    ),
    url("../assets/vyaz-frieze.svg");
  background-repeat: no-repeat, repeat-x;
  background-position: center top, center bottom;
  background-size: 100% 100%, auto 92%;
  opacity: 1;
  mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 4%,
    #000 96%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 4%,
    #000 96%,
    transparent 100%
  );
  animation: frieze-in 900ms cubic-bezier(0.22, 1, 0.36, 1) 120ms both;
}

@keyframes frieze-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.header-vyaz::before {
  content: "";
  position: absolute;
  left: var(--ksiom-header-pad-x);
  right: var(--ksiom-header-pad-x);
  top: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--ksiom-green) 15%,
    var(--ksiom-blue) 50%,
    var(--ksiom-red) 85%,
    transparent
  );
  opacity: 0.65;
}

.header-vyaz::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--ksiom-green) 0%,
    var(--ksiom-steel) 25%,
    var(--ksiom-blue) 50%,
    var(--ksiom-red) 75%,
    var(--ksiom-yellow) 100%
  );
  opacity: 0.75;
}

/* ——— сцена ——— */

.app-stage {
  position: relative;
  height: var(--ksiom-stage-h);
  min-height: var(--ksiom-stage-h);
  max-height: var(--ksiom-stage-h);
  background: var(--ksiom-paper);
  overflow: hidden;
}

#viewport {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.stage-veil {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at var(--ksiom-veil-center),
    transparent var(--ksiom-veil-clear),
    var(--ksiom-veil-edge) 100%
  );
  z-index: 2;
}

@media (max-width: 576px) {
  .brand-cartouche {
    height: clamp(1.1rem, 3.6vh, 1.6rem);
  }

  .brand-cluster {
    gap: 0.55rem;
  }
}