/* ═══════════════════════════════════════
   Lemon DOM — effect library
   ═══════════════════════════════════════ */

:root {
  --lemon-blur: 20px;
  --lemon-radius: 20px;
  --lemon-border-opacity: 0.18;
  --lemon-glow-opacity: 0.38;
  --lemon-squeeze-scale-x: 1.015;
  --lemon-squeeze-scale-y: 0.985;
  --lemon-squeeze-active-x: 1.028;
  --lemon-squeeze-active-y: 0.965;
  --lemon-squeeze-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --lemon-accent: #f3d056;
  --lemon-accent-bright: #ffe66d;
  --lemon-accent-soft: rgba(243, 208, 86, 0.45);
  --lemon-surface: rgba(14, 17, 26, 0.72);
  --lemon-zest-opacity: 0.07;
  --lemon-peel-duration: 0.85s;
  --lemon-peel-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --lemon-juice-size: 480px;
  --lemon-juice-color: rgba(255, 230, 109, 0.38);
  --lemon-shadow: 0 28px 64px rgba(0, 0, 0, 0.42);
  --lemon-highlight: rgba(255, 255, 255, 0.12);
  --lemon-zest-noise: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

.lemon-glass {
  position: relative;
  isolation: isolate;
  border-radius: var(--lemon-radius);
  background:
    linear-gradient(148deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.015)),
    var(--lemon-surface);
  border: 1px solid rgba(255, 255, 255, var(--lemon-border-opacity));
  box-shadow:
    inset 0 1px 0 var(--lemon-highlight),
    var(--lemon-shadow);
  overflow: hidden;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .lemon-glass {
    -webkit-backdrop-filter: blur(var(--lemon-blur)) saturate(1.4);
    backdrop-filter: blur(var(--lemon-blur)) saturate(1.4);
  }
}

.lemon-glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    radial-gradient(circle at 16% 10%, rgba(255, 230, 109, 0.14), transparent 44%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), transparent 42%);
  opacity: 0.88;
}

.lemon-juice {
  --lemon-x: 50%;
  --lemon-y: 50%;
  position: relative;
  overflow: hidden;
}

.lemon-juice::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.32s ease;
  background: radial-gradient(
    var(--lemon-juice-size) circle at var(--lemon-x) var(--lemon-y),
    var(--lemon-juice-color),
    transparent 64%
  );
}

.lemon-juice.is-juicing::after {
  opacity: var(--lemon-glow-opacity);
}

.lemon-juice.lemon-zest::after {
  background:
    radial-gradient(
      var(--lemon-juice-size) circle at var(--lemon-x) var(--lemon-y),
      var(--lemon-juice-color),
      transparent 64%
    ),
    var(--lemon-zest-noise);
  background-size: auto, 180px 180px;
  mix-blend-mode: normal, soft-light;
}

.lemon-zest:not(.lemon-juice)::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: var(--lemon-zest-opacity);
  mix-blend-mode: soft-light;
  background-image: var(--lemon-zest-noise);
  background-size: 180px 180px;
}

.lemon-squeeze {
  --lemon-squeeze-dx: 0;
  --lemon-squeeze-dy: 0;
  transform: translateZ(0);
  transform-origin: center center;
  touch-action: manipulation;
  transition:
    transform 0.38s var(--lemon-squeeze-spring),
    box-shadow 0.32s ease,
    filter 0.32s ease;
  will-change: transform;
}

.lemon-squeeze::before {
  transition: transform 0.38s var(--lemon-squeeze-spring), opacity 0.28s ease;
}

@media (hover: hover) {
  .lemon-squeeze:hover {
    transform:
      scale(var(--lemon-squeeze-scale-x), var(--lemon-squeeze-scale-y))
      rotate(calc(var(--lemon-squeeze-dx) * -0.6deg));
    filter: brightness(1.03);
    box-shadow:
      inset 0 -10px 24px rgba(255, 230, 109, 0.06),
      inset 0 1px 0 rgba(255, 255, 255, 0.16),
      0 20px 48px rgba(0, 0, 0, 0.38),
      0 0 0 1px rgba(255, 230, 109, 0.12);
  }

  .lemon-squeeze:hover::before {
    transform: translate(calc(var(--lemon-squeeze-dx) * 3%), calc(var(--lemon-squeeze-dy) * -4% - 2%));
  }
}

.lemon-squeeze.is-squeezing,
.lemon-squeeze:active {
  transform:
    scale(
      calc(var(--lemon-squeeze-active-x) + (var(--lemon-squeeze-dx) * 0.012)),
      calc(var(--lemon-squeeze-active-y) - (var(--lemon-squeeze-dy) * 0.018))
    );
  filter: brightness(1.05);
  transition-duration: 0.1s;
  box-shadow:
    inset 0 -14px 28px rgba(255, 230, 109, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 12px 32px rgba(0, 0, 0, 0.34),
    0 0 24px rgba(255, 230, 109, 0.14);
}

.lemon-peel {
  opacity: 0;
  transform: translateY(24px);
  clip-path: inset(100% 0 0 0 round var(--lemon-radius));
  transition:
    opacity var(--lemon-peel-duration) var(--lemon-peel-ease),
    transform var(--lemon-peel-duration) var(--lemon-peel-ease),
    clip-path calc(var(--lemon-peel-duration) * 1.05) var(--lemon-peel-ease);
}

.lemon-peel.is-peeled {
  opacity: 1;
  transform: translateY(0);
  clip-path: inset(0 0 0 0 round var(--lemon-radius));
}

@media (prefers-reduced-motion: reduce) {
  .lemon-squeeze,
  .lemon-squeeze::before,
  .lemon-juice::after,
  .lemon-peel {
    transition: none !important;
  }

  .lemon-squeeze:hover,
  .lemon-squeeze:active,
  .lemon-squeeze.is-squeezing {
    transform: none;
    filter: none;
  }

  .lemon-peel {
    opacity: 1;
    transform: none;
    clip-path: none;
  }

  .lemon-juice::after {
    opacity: 0.16;
  }
}

/* ═══════════════════════════════════════
   Demo page
   ═══════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #e8ebf4;
  background: #07090e;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 55% at 15% -5%, rgba(243, 208, 86, 0.11), transparent 58%),
    radial-gradient(ellipse 60% 45% at 92% 18%, rgba(90, 120, 200, 0.08), transparent 52%),
    radial-gradient(ellipse 70% 50% at 50% 110%, rgba(243, 208, 86, 0.05), transparent 55%),
    linear-gradient(180deg, #07090e 0%, #0c1018 45%, #080a0f 100%);
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: var(--lemon-zest-noise);
  background-size: 200px 200px;
  z-index: 0;
}

a {
  color: var(--lemon-accent-bright);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #fff3a8;
}

code,
kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--lemon-accent-bright);
  color: #111;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site {
  position: relative;
  z-index: 1;
}

.container {
  width: min(1040px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ── Top bar ── */

.topbar {
  padding: 1.35rem 0 0.5rem;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topbar__meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.topbar__github {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(232, 235, 244, 0.58);
}

.topbar__github:hover {
  color: var(--lemon-accent-bright);
  text-decoration: underline;
}

.topbar__brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-decoration: none;
  color: inherit;
}

.topbar__brand:hover {
  color: inherit;
}

.topbar__brand small {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 235, 244, 0.48);
}

.topbar__brand strong {
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.82rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 230, 109, 0.22);
  background: rgba(255, 230, 109, 0.06);
  color: var(--lemon-accent-bright);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ── Hero ── */

.hero {
  padding: 3.5rem 0 4.5rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}

.hero__copy {
  display: grid;
  gap: 1.25rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(243, 208, 86, 0.78);
}

.hero__title {
  margin: 0;
  font-size: clamp(3rem, 7vw, 4.75rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 700;
}

.hero__subhead {
  margin: 0;
  font-size: clamp(1.2rem, 2.4vw, 1.45rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: rgba(232, 235, 244, 0.92);
  max-width: 22ch;
}

.hero__body {
  margin: 0;
  max-width: 42ch;
  font-size: 1.05rem;
  color: rgba(232, 235, 244, 0.62);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  color: #e8ebf4;
  font: inherit;
  font-size: 0.94rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 230, 109, 0.28);
}

.btn--primary {
  background: linear-gradient(135deg, #ffe66d, #f3d056);
  color: #14120a;
  border-color: transparent;
  font-weight: 600;
}

.btn--primary:hover {
  background: linear-gradient(135deg, #fff0a0, #ffe66d);
  color: #14120a;
}

.btn--ghost {
  background: transparent;
}

.hero__stage {
  position: relative;
  min-height: 360px;
}

.hero__stage-glow {
  position: absolute;
  inset: 12% 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 230, 109, 0.16), transparent 68%);
  filter: blur(28px);
  pointer-events: none;
}

.hero__panel {
  position: relative;
  min-height: 360px;
  padding: 1.75rem;
  display: grid;
  gap: 1.25rem;
  --lemon-radius: 22px;
  --lemon-blur: 24px;
  --lemon-glow-opacity: 0.44;
}

.hero__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.hero__panel-head span {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 235, 244, 0.5);
}

.hero__panel-head strong {
  font-size: 0.88rem;
  font-weight: 600;
}

.hero__panel-body h2 {
  margin: 0 0 0.45rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.hero__panel-body p {
  margin: 0;
  color: rgba(232, 235, 244, 0.62);
  font-size: 0.98rem;
  max-width: 30ch;
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.chip {
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(255, 230, 109, 0.82);
}

.hero__hint {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(232, 235, 244, 0.42);
}

/* ── Sections ── */

.section {
  padding: 3.75rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.section__head {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 2rem;
  max-width: 52ch;
}

.section__head h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section__head p {
  margin: 0;
  font-size: 1.02rem;
  color: rgba(232, 235, 244, 0.6);
}

/* ── Feature strip ── */

.features {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

.feature {
  padding: 1.15rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.02);
  display: grid;
  gap: 0.55rem;
}

.feature__index {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(243, 208, 86, 0.65);
}

.feature h3 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.feature code {
  font-size: 0.72rem;
  color: rgba(255, 230, 109, 0.78);
}

.feature p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: rgba(232, 235, 244, 0.55);
}

/* ── Gallery bento ── */

.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.85rem;
}

.demo-card {
  padding: 1.35rem;
  min-height: 168px;
  display: grid;
  gap: 0.55rem;
  align-content: start;
  --lemon-radius: 18px;
}

.demo-card__label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(243, 208, 86, 0.7);
}

.demo-card h3 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.demo-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: rgba(232, 235, 244, 0.58);
}

.demo-card code {
  font-size: 0.74rem;
  color: rgba(255, 230, 109, 0.8);
}

.demo-card--featured {
  grid-column: span 7;
  min-height: 240px;
  padding: 1.65rem;
}

.demo-card--featured p {
  max-width: 38ch;
  font-size: 0.95rem;
}

.demo-card--squeeze {
  grid-column: span 5;
  min-height: 240px;
  justify-content: space-between;
}

.demo-card--squeeze .squeeze-target {
  margin-top: 0.75rem;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(232, 235, 244, 0.72);
  cursor: pointer;
  user-select: none;
}

.demo-card--small {
  grid-column: span 4;
}

.demo-card--wide {
  grid-column: span 8;
}

.demo-card--peel {
  grid-column: span 4;
}

/* ── Code block ── */

.code-block {
  display: grid;
  gap: 1.25rem;
}

.code-block__intro {
  display: grid;
  gap: 0.5rem;
  max-width: 48ch;
}

.code-block__intro p {
  margin: 0;
  color: rgba(232, 235, 244, 0.6);
  font-size: 1rem;
}

.code-panel {
  border-radius: 20px;
  overflow: hidden;
  --lemon-radius: 20px;
}

.code-panel__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(0, 0, 0, 0.18);
}

.code-tabs {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.2rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.code-tab {
  border: 0;
  background: transparent;
  color: rgba(232, 235, 244, 0.55);
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.code-tab.is-active {
  background: rgba(255, 230, 109, 0.14);
  color: #fff3b0;
}

.code-tab:focus-visible {
  outline: 2px solid rgba(255, 230, 109, 0.5);
  outline-offset: 2px;
}

.copy-btn {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(232, 235, 244, 0.78);
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 230, 109, 0.24);
}

.copy-btn.is-copied {
  border-color: rgba(255, 230, 109, 0.35);
  color: #fff3b0;
}

.code-panel pre {
  margin: 0;
  padding: 1.35rem 1.4rem 1.5rem;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.65;
  color: #dde2f0;
  background: rgba(0, 0, 0, 0.32);
}

.code-panel [hidden] {
  display: none;
}

/* ── Notes ── */

.notes {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0.85rem;
}

.note {
  padding: 1.35rem 1.4rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.02);
}

.note h3 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
}

.note p {
  margin: 0;
  font-size: 0.94rem;
  color: rgba(232, 235, 244, 0.58);
}

.note p + p {
  margin-top: 0.75rem;
}

.note--accent {
  border-color: rgba(255, 230, 109, 0.14);
  background:
    linear-gradient(145deg, rgba(255, 230, 109, 0.06), rgba(255, 255, 255, 0.01)),
    rgba(255, 255, 255, 0.02);
}

/* ── Footer ── */

.footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  color: rgba(232, 235, 244, 0.48);
  font-size: 0.88rem;
}

.footer__inner strong {
  color: rgba(232, 235, 244, 0.82);
}

.footer__inner a {
  text-decoration: none;
}

.footer__inner a:hover {
  text-decoration: underline;
}

/* ── Responsive ── */

@media (max-width: 960px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__subhead {
    max-width: none;
  }

  .hero__stage {
    order: -1;
    min-height: 300px;
  }

  .hero__panel {
    min-height: 300px;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .demo-card--featured,
  .demo-card--squeeze,
  .demo-card--small,
  .demo-card--wide,
  .demo-card--peel {
    grid-column: span 12;
  }

  .notes {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100%, calc(100% - 1.5rem));
  }

  .topbar__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .code-panel__toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .copy-btn {
    width: 100%;
  }
}