/* Sticky glass header + mobile + effects bay */
:root {
  --header-h: 88px;
  --scroll-gap: 20px;
  --anchor-offset: calc(var(--header-h) + var(--scroll-gap));
}

html {
  scroll-padding-top: var(--anchor-offset);
}

body {
  padding-top: var(--header-h);
}

/* Keep sticky header from clipping section tops (cards → playground) */
#workspace,
#presets,
#effects {
  scroll-margin-top: var(--anchor-offset);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  margin: 0 !important;
  display: block !important;
  gap: 0 !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 12, 12, 0.55);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header .logo {
  color: var(--text);
  text-decoration: none;
}

.site-header.is-scrolled {
  background: rgba(10, 10, 10, 0.78);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.site-header__bar {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 30px;
  margin: 0 3%;
  max-width: 1740px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 0;
}

@media (min-width: 1700px) {
  .site-header__bar {
    padding-left: 40px;
    padding-right: 40px;
  }
}

.site-nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  align-items: center;
  font-size: 8px;
}

.site-nav a,
.site-nav button {
  color: var(--muted);
  font-size: 8px;
  padding: 10px 0;
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
}

.site-nav .active,
.site-nav a:hover,
.site-nav button:hover {
  color: var(--text);
}

.nav-admin {
  border: 1px solid #4a4a4a !important;
  padding: 7px 10px !important;
  letter-spacing: 0.08em;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  cursor: pointer;
  z-index: 120;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: #e0e0e0;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.site-header.is-open .menu-toggle span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.site-header.is-open .menu-toggle span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.menu-veil {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  z-index: 90;
}

.site-footer {
  display: flex;
  align-items: center;
  gap: 35px;
  padding: 31px 0 35px;
  margin-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 6px;
  line-height: 1.8;
  color: #6d6d6d;
  letter-spacing: 0.4px;
}

.site-footer .footlogo {
  font-family: "Pixelify Sans", monospace;
  font-size: 29px;
  color: #939393;
  letter-spacing: -1px;
}

.site-footer .footlogo span {
  font-size: 8px;
  vertical-align: top;
  margin-left: 4px;
  font-family: "JetBrains Mono", monospace;
}

.footer-copy {
  margin-left: auto;
  text-align: right;
  color: #8a8a8a;
}

.effects-bay {
  margin-top: 42px;
  padding-bottom: 10px;
}

.effects-lead {
  font-size: 8px;
  color: #8a8a8a;
  line-height: 1.8;
  margin: 0 0 18px;
  max-width: 52ch;
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.effect-card {
  border: 1px solid #373737;
  background: #101010;
  padding: 16px;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s, background 0.2s, transform 0.35s ease;
  width: 100%;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
  border-radius: 0;
}

.effect-card:hover {
  border-color: #949494;
  background: #1c1c1c;
}

.effect-card:focus-visible {
  outline: 1px solid #cfcfcf;
  outline-offset: 2px;
}

.effect-card:active:not(.is-soon) {
  transform: translateY(1px);
}

.effect-card.is-soon {
  cursor: default;
}

.effect-card__meta {
  display: flex;
  justify-content: space-between;
  font-size: 6px;
  color: #757575;
  letter-spacing: 0.08em;
}

.effect-card__title {
  font-family: "Pixelify Sans", monospace;
  font-size: 16px;
  letter-spacing: 0.02em;
  margin: 0;
}

.effect-card__desc {
  font-size: 8px;
  color: #8e8e8e;
  line-height: 1.7;
  margin: 0;
  flex: 1;
}

.effect-card__status {
  font-size: 7px;
  color: #b5b5b5;
  border-top: 1px solid #2a2a2a;
  padding-top: 10px;
  letter-spacing: 0.06em;
}

.effect-card.is-soon {
  opacity: 0.72;
}

.effect-card.is-soon .effect-card__status {
  color: #6f6f6f;
}

/* Glass blur back-to-top */
.back-top {
  position: fixed;
  right: max(16px, 3vw);
  bottom: max(18px, 3vh);
  z-index: 120;
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(12, 12, 12, 0.45);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  color: #e8e8e8;
  font: 18px/1 "JetBrains Mono", monospace;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.2s, background 0.2s;
}

.back-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(20, 20, 20, 0.62);
}

.back-top:focus-visible {
  outline: 1px solid #cfcfcf;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .back-top {
    transition: none;
  }
}

.reveal {
  opacity: 1;
}

/* Engine list: 18 generators */
#engineList {
  overflow-y: auto;
  max-height: min(520px, 58vh);
  scrollbar-width: thin;
  scrollbar-color: #3a3a3a transparent;
  overscroll-behavior: contain;
}

#viewport,
.preset-viewport,
.parameters {
  overscroll-behavior: contain;
}

@media (max-width: 980px) {
  #engineList {
    max-height: none;
    overflow: visible;
    grid-template-columns: repeat(6, 1fr) !important;
  }
}

/* Preset pages slider — rest of page stays static */
.preset-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}

.preset-controls > span {
  font-size: 7px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.preset-arrows {
  display: flex;
  gap: 6px;
}

.preset-arrow {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #3a3a3a;
  background: #121212;
  color: var(--text);
  font: 14px/1 "JetBrains Mono", monospace;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, opacity 0.2s;
}

.preset-arrow:hover:not(:disabled) {
  border-color: #8a8a8a;
  background: #1c1c1c;
}

.preset-arrow:disabled {
  opacity: 0.35;
  cursor: default;
}

.preset-slider {
  position: relative;
}

.preset-viewport {
  overflow: hidden;
  width: 100%;
  touch-action: pan-y;
}

.preset-track {
  display: flex;
  width: 100%;
  will-change: transform;
}

.preset-page.presetList {
  flex: 0 0 100%;
  width: 100%;
  min-width: 100%;
  box-sizing: border-box;
}

.preset-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

.preset-dot {
  width: 7px;
  height: 7px;
  padding: 0;
  border: 1px solid #555;
  border-radius: 0;
  background: transparent;
  cursor: pointer;
}

.preset-dot.is-active {
  background: #d0d0d0;
  border-color: #d0d0d0;
}

@media (max-width: 900px) {
  .sectionheading {
    flex-wrap: wrap;
    gap: 12px;
  }
  .preset-controls {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 1200px) {
  .site-header__bar {
    gap: 18px;
  }
  .system {
    display: none;
  }
  .site-nav {
    gap: 18px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 72px;
    --scroll-gap: 16px;
  }
  .version {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: min(320px, 88vw);
    height: calc(100dvh - var(--header-h));
    margin: 0;
    padding: 24px 22px 40px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(12, 12, 12, 0.92);
    backdrop-filter: blur(22px) saturate(150%);
    -webkit-backdrop-filter: blur(22px) saturate(150%);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateX(104%);
    transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    z-index: 110;
    overflow: auto;
  }
  .site-header.is-open .site-nav {
    transform: translateX(0);
  }
  .site-nav a,
  .site-nav button {
    font-size: 11px;
    padding: 14px 4px;
    border-bottom: 1px solid #222;
    text-align: left;
  }
  .nav-admin {
    margin-top: 12px;
    text-align: center !important;
  }
  .effects-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  :root {
    --header-h: 64px;
    --scroll-gap: 14px;
  }
  .site-header__bar {
    margin: 0 4%;
    gap: 10px;
  }
  .logo {
    font-size: 28px;
  }
  .effects-grid {
    grid-template-columns: 1fr;
  }
  .site-footer {
    flex-wrap: wrap;
    gap: 14px;
  }
  .footer-copy {
    margin-left: 0;
    width: 100%;
    text-align: left;
  }
  .site-footer .footlogo {
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-nav,
  .menu-toggle span,
  .effect-card {
    transition: none !important;
  }
}