/* ============================================================================
   Interactive System
   Unified prismatic glass + tactile controls across pages using theme-toggle.js
   ============================================================================ */

:root {
  --interactive-prism-gradient-fallback: linear-gradient(
    112deg,
    #22d3ee 0%,
    #38bdf8 8.33%,
    #4f46e5 16.66%,
    #7c3aed 25%,
    #d946ef 33.33%,
    #34d399 41.66%,
    #22d3ee 50%,
    #38bdf8 58.33%,
    #4f46e5 66.66%,
    #7c3aed 75%,
    #d946ef 83.33%,
    #34d399 91.66%,
    #22d3ee 100%
  );
  /* Dark mode: use shared gradient token when available, else hex fallback.
     var() nesting ensures the about page (which doesn't load _gradients.css)
     still gets the hex gradient instead of guaranteed-invalid. */
  --interactive-prism-gradient: var(--prism-gradient-112, var(--interactive-prism-gradient-fallback));
  --interactive-prism-size: 200% 100%;
  --interactive-prism-loop-end: 200%;
  --interactive-link-glow: rgba(56, 189, 248, 0.35);
  --interactive-edge: rgba(255, 255, 255, 0.18);
  --interactive-edge-soft: rgba(255, 255, 255, 0.08);
  --interactive-depth-shadow:
    0 10px 24px rgba(2, 6, 23, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -1px 0 rgba(2, 6, 23, 0.34);
  --interactive-depth-shadow-hover:
    0 14px 28px rgba(2, 6, 23, 0.34),
    0 0 0 1px rgba(148, 163, 184, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.24),
    inset 0 -1px 0 rgba(2, 6, 23, 0.42);
  --interactive-loop-speed: 2.35s;
}

html[data-theme="light"] {
  --interactive-prism-gradient-fallback: linear-gradient(
    112deg,
    #0891b2 0%,
    #0284c7 8.33%,
    #4338ca 16.66%,
    #6d28d9 25%,
    #a21caf 33.33%,
    #0f766e 41.66%,
    #0891b2 50%,
    #0284c7 58.33%,
    #4338ca 66.66%,
    #6d28d9 75%,
    #a21caf 83.33%,
    #0f766e 91.66%,
    #0891b2 100%
  );
  --interactive-prism-gradient: linear-gradient(
    112deg,
    oklch(0.62 0.22 188) 0%,
    oklch(0.59 0.24 220) 8.33%,
    oklch(0.56 0.25 248) 16.66%,
    oklch(0.54 0.24 282) 25%,
    oklch(0.55 0.23 322) 33.33%,
    oklch(0.58 0.21 166) 41.66%,
    oklch(0.62 0.22 188) 50%,
    oklch(0.59 0.24 220) 58.33%,
    oklch(0.56 0.25 248) 66.66%,
    oklch(0.54 0.24 282) 75%,
    oklch(0.55 0.23 322) 83.33%,
    oklch(0.58 0.21 166) 91.66%,
    oklch(0.62 0.22 188) 100%
  );
  --interactive-link-glow: rgba(14, 165, 233, 0.22);
  --interactive-edge: rgba(255, 255, 255, 0.62);
  --interactive-edge-soft: rgba(15, 23, 42, 0.12);
  --interactive-depth-shadow:
    0 8px 20px rgba(15, 23, 42, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    inset 0 -1px 0 rgba(15, 23, 42, 0.12);
  --interactive-depth-shadow-hover:
    0 12px 24px rgba(15, 23, 42, 0.2),
    0 0 0 1px rgba(14, 165, 233, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.96),
    inset 0 -1px 0 rgba(15, 23, 42, 0.18);
}

/* Resume uses perspective accent hues instead of rainbow. */
.resume-page {
  --interactive-prism-gradient-fallback: linear-gradient(
    112deg,
    var(--color-accent) 0%,
    var(--color-emphasis) 16.66%,
    color-mix(in oklab, var(--color-accent) 72%, var(--color-fg) 28%) 33.33%,
    var(--color-accent) 50%,
    var(--color-emphasis) 66.66%,
    color-mix(in oklab, var(--color-accent) 72%, var(--color-fg) 28%) 83.33%,
    var(--color-accent) 100%
  );
  --interactive-prism-gradient: linear-gradient(
    112deg,
    var(--color-accent) 0%,
    var(--color-emphasis) 16.66%,
    color-mix(in oklab, var(--color-accent) 72%, var(--color-fg) 28%) 33.33%,
    var(--color-accent) 50%,
    var(--color-emphasis) 66.66%,
    color-mix(in oklab, var(--color-accent) 72%, var(--color-fg) 28%) 83.33%,
    var(--color-accent) 100%
  );
  --interactive-link-glow: color-mix(in oklab, var(--color-accent) 36%, transparent);
}

/*
  prismFlow is also defined in _animations.css for pages that import the core stack.
  This copy is required because interactive-system.css is dynamically injected via
  theme-toggle.js on pages (e.g. /about/) that don't import the core CSS stack.
*/
@keyframes prismFlow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

@keyframes interactivePrismSweep {
  0% {
    transform: translateX(-180%);
  }
  100% {
    transform: translateX(240%);
  }
}

:is(
  .btn,
  .action-link,
  .action-button,
  .perspective-link,
  .connect-link,
  .hero-label,
  .reader-action-button,
  .code-copy-button,
  .nav-toggle
) {
  border-color: color-mix(in oklab, var(--border, rgba(148, 163, 184, 0.24)) 84%, var(--interactive-edge));
  box-shadow: var(--interactive-depth-shadow);
  transition:
    transform 220ms cubic-bezier(0.22, 0.8, 0.3, 1),
    border-color 220ms ease,
    box-shadow 240ms ease,
    filter 220ms ease;
}

@media (hover: hover) and (pointer: fine) {
  :is(
    .btn,
    .action-link,
    .action-button,
    .perspective-link,
    .connect-link,
    .hero-label,
    .reader-action-button,
    .code-copy-button,
    .nav-toggle
  ):hover {
    transform: translateY(-1px);
    border-color: color-mix(in oklab, var(--interactive-edge) 40%, var(--border, rgba(148, 163, 184, 0.24)));
    box-shadow: var(--interactive-depth-shadow-hover);
  }

  :is(
    .btn,
    .action-link,
    .action-button,
    .perspective-link,
    .connect-link,
    .hero-label,
    .reader-action-button,
    .code-copy-button,
    .nav-toggle
  ):active {
    transform: translateY(0);
    transition-duration: 120ms;
  }
}

:is(.theme-toggle, .footer-share-button, [data-footer-share], .nav-toggle) {
  min-inline-size: 2.75rem;
  min-block-size: 2.75rem;
}

body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error) {
  color: var(--text-secondary, #cbd5e1);
  border-color: color-mix(in oklab, var(--border, rgba(148, 163, 184, 0.26)) 84%, var(--interactive-edge));
  background:
    linear-gradient(
      158deg,
      rgba(255, 255, 255, 0.16) 0%,
      rgba(255, 255, 255, 0.03) 56%,
      rgba(2, 6, 23, 0.22) 100%
    ),
    rgba(15, 23, 42, 0.38);
  box-shadow: var(--interactive-depth-shadow);
  transition:
    transform 220ms cubic-bezier(0.22, 0.8, 0.3, 1),
    color 200ms ease,
    border-color 220ms ease,
    background 240ms ease,
    box-shadow 240ms ease;
}

html[data-theme="light"] body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error) {
  color: var(--text-secondary, #334155);
  border-color: color-mix(in oklab, var(--border, rgba(15, 23, 42, 0.16)) 84%, rgba(56, 189, 248, 0.22));
  background:
    linear-gradient(
      158deg,
      rgba(255, 255, 255, 0.98) 0%,
      rgba(248, 250, 252, 0.94) 56%,
      rgba(226, 232, 240, 0.9) 100%
    ),
    rgba(248, 250, 252, 0.9);
}

/* Resume keeps the same interaction model with perspective-accented tactile edges. */
.resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error) {
  color: var(--color-fg-muted, #cbd5e1);
  border-color: color-mix(in oklab, var(--color-accent, #60a5fa) 46%, var(--color-border, rgba(148, 163, 184, 0.26)));
  background:
    linear-gradient(
      158deg,
      color-mix(in oklab, white 26%, transparent) 0%,
      color-mix(in oklab, var(--color-accent-soft, rgba(148, 163, 184, 0.2)) 20%, transparent) 54%,
      color-mix(in oklab, var(--color-accent, rgba(96, 165, 250, 0.5)) 12%, transparent) 100%
    ),
    color-mix(in oklab, var(--color-surface, rgba(15, 23, 42, 0.4)) 92%, transparent);
  box-shadow:
    0 8px 18px -12px color-mix(in oklab, var(--color-accent, #60a5fa) 42%, transparent),
    inset 0 1px 0 color-mix(in oklab, white 84%, transparent),
    inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis, #cbd5e1) 20%, transparent);
  transition:
    transform 220ms cubic-bezier(0.22, 0.8, 0.3, 1),
    color 200ms ease,
    border-color 220ms ease,
    background 240ms ease,
    box-shadow 240ms ease;
}

html[data-theme="light"] .resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error) {
  color: var(--color-emphasis, #1e293b);
  border-color: color-mix(in oklab, var(--color-accent, #60a5fa) 52%, var(--color-border, rgba(15, 23, 42, 0.14)));
  background:
    linear-gradient(
      158deg,
      rgba(255, 255, 255, 0.96) 0%,
      color-mix(in oklab, var(--color-accent-soft, rgba(191, 219, 254, 0.45)) 38%, rgba(248, 250, 252, 0.94)) 54%,
      color-mix(in oklab, var(--color-accent-soft, rgba(147, 197, 253, 0.4)) 36%, rgba(226, 232, 240, 0.9)) 100%
    ),
    color-mix(in oklab, var(--color-surface, #ffffff) 92%, transparent);
  box-shadow:
    0 8px 18px -12px color-mix(in oklab, var(--color-accent, #60a5fa) 34%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis, #1e293b) 16%, transparent);
}

@media (hover: hover) and (pointer: fine) {
  body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):hover {
    transform: translateY(-1px);
    color: var(--text-primary, #f8fafc);
    border-color: color-mix(in oklab, var(--interactive-link-glow) 66%, rgba(148, 163, 184, 0.36));
    background:
      linear-gradient(
        132deg,
        color-mix(in oklab, oklch(0.82 0.18 197) 22%, rgba(15, 23, 42, 0.74)) 0%,
        color-mix(in oklab, oklch(0.8 0.2 245) 18%, rgba(15, 23, 42, 0.72)) 56%,
        color-mix(in oklab, oklch(0.8 0.19 300) 16%, rgba(15, 23, 42, 0.76)) 100%
      );
    box-shadow: var(--interactive-depth-shadow-hover);
  }

  html[data-theme="light"] body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):hover {
    color: var(--text-primary, #0f172a);
    border-color: color-mix(in oklab, rgba(56, 189, 248, 0.56) 62%, rgba(14, 165, 233, 0.34));
    background:
      linear-gradient(
        132deg,
        rgba(217, 245, 255, 0.98) 0%,
        rgba(232, 247, 255, 0.96) 40%,
        rgba(229, 243, 255, 0.95) 72%,
        rgba(236, 240, 255, 0.94) 100%
      );
  }

  .resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):hover {
    transform: translateY(-1px);
    color: var(--color-emphasis, #e2e8f0);
    border-color: color-mix(in oklab, var(--color-accent, #60a5fa) 68%, var(--color-border, rgba(148, 163, 184, 0.28)));
    background:
      linear-gradient(
        132deg,
        color-mix(in oklab, var(--color-accent, #60a5fa) 26%, rgba(15, 23, 42, 0.82)) 0%,
        color-mix(in oklab, var(--color-accent, #60a5fa) 18%, rgba(30, 41, 59, 0.78)) 54%,
        color-mix(in oklab, var(--color-accent, #60a5fa) 22%, rgba(15, 23, 42, 0.82)) 100%
      );
    box-shadow:
      0 12px 24px -14px color-mix(in oklab, var(--color-accent, #60a5fa) 52%, transparent),
      inset 0 1px 0 color-mix(in oklab, white 90%, transparent),
      inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis, #e2e8f0) 24%, transparent);
  }

  html[data-theme="light"] .resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):hover {
    color: var(--color-emphasis, #0f172a);
    border-color: color-mix(in oklab, var(--color-accent, #60a5fa) 70%, rgba(56, 189, 248, 0.44));
    background:
      linear-gradient(
        132deg,
        color-mix(in oklab, var(--color-accent-soft, rgba(191, 219, 254, 0.6)) 46%, rgba(255, 255, 255, 0.96)) 0%,
        color-mix(in oklab, var(--color-accent-soft, rgba(191, 219, 254, 0.52)) 40%, rgba(241, 245, 249, 0.94)) 52%,
        color-mix(in oklab, var(--color-accent-soft, rgba(191, 219, 254, 0.58)) 44%, rgba(226, 232, 240, 0.92)) 100%
      );
  }
}

body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):focus-visible {
  transform: translateY(-1px);
  color: var(--text-primary, #f8fafc);
  border-color: color-mix(in oklab, var(--interactive-link-glow) 66%, rgba(148, 163, 184, 0.36));
  box-shadow: var(--interactive-depth-shadow-hover);
}

html[data-theme="light"] body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):focus-visible {
  color: var(--text-primary, #0f172a);
}

.resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):focus-visible {
  transform: translateY(-1px);
  color: var(--color-emphasis, #e2e8f0);
  border-color: color-mix(in oklab, var(--color-accent, #60a5fa) 66%, var(--color-border, rgba(148, 163, 184, 0.28)));
  box-shadow:
    0 12px 24px -14px color-mix(in oklab, var(--color-accent, #60a5fa) 52%, transparent),
    inset 0 1px 0 color-mix(in oklab, white 90%, transparent),
    inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis, #e2e8f0) 24%, transparent);
}

html[data-theme="light"] .resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):not(.is-success):not(.is-error):focus-visible {
  color: var(--color-emphasis, #0f172a);
}

body:not(.resume-page) [data-footer-controls] :is(.theme-toggle, .footer-share-button):active {
  transform: translateY(0);
}

.resume-page [data-footer-controls] :is(.theme-toggle, .footer-share-button):active {
  transform: translateY(0);
}

:is(.btn-accent) {
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.14),
    0 2px 8px rgba(15, 23, 42, 0.4);
}

:is(.btn-accent):hover {
  background-image:
    linear-gradient(
      120deg,
      color-mix(in oklab, oklch(0.82 0.2 195) 48%, transparent),
      color-mix(in oklab, oklch(0.78 0.22 245) 48%, transparent),
      color-mix(in oklab, oklch(0.8 0.2 300) 46%, transparent)
    );
}

:is(.btn-lab):hover,
:is(.btn-lab):focus-visible {
  color: color-mix(in oklab, oklch(0.78 0.21 245) 64%, #ecfeff 36%);
  border-color: color-mix(in oklab, oklch(0.78 0.18 205) 48%, rgba(56, 189, 248, 0.62));
  background:
    linear-gradient(
      132deg,
      rgba(34, 211, 238, 0.24) 0%,
      rgba(59, 130, 246, 0.22) 48%,
      rgba(99, 102, 241, 0.2) 100%
    ),
    color-mix(in oklab, rgba(15, 23, 42, 0.78) 78%, rgba(2, 6, 23, 0.84));
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2),
    0 8px 18px rgba(14, 165, 233, 0.26);
}

:is(.btn-qual):hover,
:is(.btn-qual):focus-visible {
  color: color-mix(in oklab, oklch(0.82 0.18 76) 70%, #fff7ed 30%);
  border-color: color-mix(in oklab, oklch(0.8 0.18 72) 54%, rgba(251, 146, 60, 0.64));
  background:
    linear-gradient(
      132deg,
      rgba(251, 146, 60, 0.25) 0%,
      rgba(249, 115, 22, 0.2) 52%,
      rgba(236, 72, 153, 0.16) 100%
    ),
    color-mix(in oklab, rgba(15, 23, 42, 0.78) 78%, rgba(2, 6, 23, 0.84));
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2),
    0 8px 16px rgba(251, 146, 60, 0.25);
}

:is(.btn-portfolio):hover,
:is(.btn-portfolio):focus-visible {
  color: color-mix(in oklab, oklch(0.79 0.2 220) 66%, #ecfeff 34%);
  border-color: color-mix(in oklab, oklch(0.76 0.17 205) 52%, rgba(56, 189, 248, 0.62));
  background:
    linear-gradient(
      132deg,
      rgba(34, 211, 238, 0.24) 0%,
      rgba(14, 165, 233, 0.22) 52%,
      rgba(59, 130, 246, 0.18) 100%
    ),
    color-mix(in oklab, rgba(15, 23, 42, 0.78) 78%, rgba(2, 6, 23, 0.84));
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2),
    0 8px 16px rgba(14, 165, 233, 0.24);
}

:is(.btn-resume):hover,
:is(.btn-resume):focus-visible {
  color: color-mix(in oklab, oklch(0.83 0.18 70) 68%, #fff7ed 32%);
  border-color: color-mix(in oklab, oklch(0.8 0.17 72) 54%, rgba(251, 146, 60, 0.62));
  background:
    linear-gradient(
      132deg,
      rgba(251, 146, 60, 0.25) 0%,
      rgba(249, 115, 22, 0.2) 52%,
      rgba(217, 119, 6, 0.18) 100%
    ),
    color-mix(in oklab, rgba(15, 23, 42, 0.78) 78%, rgba(2, 6, 23, 0.84));
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2),
    0 8px 16px rgba(251, 146, 60, 0.23);
}

html[data-theme="light"] :is(.btn-lab):hover,
html[data-theme="light"] :is(.btn-lab):focus-visible {
  color: color-mix(in oklab, oklch(0.5 0.15 245) 72%, #0f172a 28%);
  border-color: color-mix(in oklab, oklch(0.66 0.14 215) 58%, rgba(56, 189, 248, 0.4));
  background:
    linear-gradient(
      132deg,
      rgba(186, 230, 253, 0.96) 0%,
      rgba(191, 219, 254, 0.92) 48%,
      rgba(224, 231, 255, 0.9) 100%
    );
}

html[data-theme="light"] :is(.btn-qual):hover,
html[data-theme="light"] :is(.btn-qual):focus-visible {
  color: color-mix(in oklab, oklch(0.55 0.16 72) 74%, #0f172a 26%);
  border-color: color-mix(in oklab, oklch(0.7 0.13 68) 58%, rgba(251, 146, 60, 0.4));
  background:
    linear-gradient(
      132deg,
      rgba(254, 215, 170, 0.95) 0%,
      rgba(254, 243, 199, 0.92) 48%,
      rgba(255, 228, 230, 0.88) 100%
    );
}

html[data-theme="light"] :is(.btn-portfolio):hover,
html[data-theme="light"] :is(.btn-portfolio):focus-visible {
  color: color-mix(in oklab, oklch(0.52 0.16 225) 74%, #0f172a 26%);
  border-color: color-mix(in oklab, oklch(0.64 0.14 215) 58%, rgba(14, 165, 233, 0.4));
  background:
    linear-gradient(
      132deg,
      rgba(207, 250, 254, 0.95) 0%,
      rgba(219, 234, 254, 0.9) 48%,
      rgba(224, 231, 255, 0.88) 100%
    );
}

html[data-theme="light"] :is(.btn-resume):hover,
html[data-theme="light"] :is(.btn-resume):focus-visible {
  color: color-mix(in oklab, oklch(0.54 0.16 70) 74%, #0f172a 26%);
  border-color: color-mix(in oklab, oklch(0.7 0.13 68) 58%, rgba(251, 146, 60, 0.4));
  background:
    linear-gradient(
      132deg,
      rgba(254, 215, 170, 0.95) 0%,
      rgba(254, 243, 199, 0.92) 48%,
      rgba(255, 228, 230, 0.88) 100%
    );
}

:is(.btn .btn-icon, .hero-label svg, .connect-link svg) {
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

:is(
  .btn .btn-icon[fill="none"],
  .hero-label svg[fill="none"],
  .connect-link svg[fill="none"],
  .theme-toggle-icon svg,
  .footer-share-icon svg
) {
  stroke-width: 2.05;
}

:is(.btn-accent .btn-icon, .connect-link svg) {
  width: clamp(1.12rem, 0.5vw + 1rem, 1.38rem);
  height: clamp(1.12rem, 0.5vw + 1rem, 1.38rem);
}

:is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a) {
  background-image: var(--interactive-prism-gradient-fallback);
  background-image: var(--interactive-prism-gradient);
  background-size: var(--interactive-prism-size);
  background-position: 0% 50%;
  background-repeat: repeat;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: currentColor;
  transition:
    color 180ms ease,
    text-shadow 220ms ease,
    filter 220ms ease;
}

@media (hover: hover) and (pointer: fine) {
  :is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a):hover,
  :is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a):focus-visible {
    color: transparent;
    -webkit-text-fill-color: transparent;
    background-position: 0% 50%;
    animation: prismFlow var(--interactive-loop-speed) linear infinite;
    text-shadow:
      0 0 14px var(--interactive-link-glow),
      0 0 26px color-mix(in oklab, var(--interactive-link-glow) 68%, transparent);
    filter: saturate(1.08);
    will-change: background-position;
  }
}

:is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a):focus-visible,
:is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a):active {
  color: transparent;
  -webkit-text-fill-color: transparent;
  background-position: 0% 50%;
  animation: prismFlow var(--interactive-loop-speed) linear infinite;
  text-shadow:
    0 0 14px var(--interactive-link-glow),
    0 0 24px color-mix(in oklab, var(--interactive-link-glow) 62%, transparent);
}

.resume-page :is(.perspective-link, .action-link, .action-button) {
  box-shadow:
    0 8px 18px -12px color-mix(in oklab, var(--color-emphasis) 38%, transparent),
    inset 0 1px 0 color-mix(in oklab, white 84%, transparent),
    inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis) 20%, transparent);
  border-color: color-mix(in oklab, var(--color-accent) 42%, var(--color-border));
}

.resume-page :is(.perspective-link, .action-link, .action-button):hover,
.resume-page :is(.perspective-link, .action-link, .action-button):focus-visible {
  box-shadow:
    0 12px 24px -14px color-mix(in oklab, var(--color-accent) 52%, transparent),
    inset 0 1px 0 color-mix(in oklab, white 92%, transparent),
    inset 0 -1px 0 color-mix(in oklab, var(--color-emphasis) 26%, transparent);
}

.resume-page .perspective-link.is-active {
  transform: translateY(0.5px);
  box-shadow:
    0 4px 10px -8px color-mix(in oklab, var(--color-accent) 48%, transparent),
    inset 0 2px 4px color-mix(in oklab, var(--color-accent) 22%, transparent),
    inset 0 1px 0 color-mix(in oklab, white 72%, transparent);
}

@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  :is(.footer-links a, .text-link, .back-link, .contact-list a, .article-content a) {
    background-image: none;
    animation: none;
    text-shadow: none;
    filter: none;
  }
}

:is(.hero-cta-section .btn-large) {
  border-color: color-mix(in oklab, var(--interactive-edge) 42%, rgba(255, 255, 255, 0.32));
  box-shadow:
    0 16px 34px rgba(2, 6, 23, 0.36),
    0 0 0 1px rgba(148, 163, 184, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.28),
    inset 0 -1px 0 rgba(2, 6, 23, 0.36);
}

html[data-theme="light"] :is(.hero-cta-section .btn-large) {
  box-shadow:
    0 14px 30px rgba(15, 23, 42, 0.2),
    0 0 0 1px rgba(148, 163, 184, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(15, 23, 42, 0.12);
}

:is(.hero-cta-section .btn-large)::before {
  background: linear-gradient(
    102deg,
    transparent 0%,
    rgba(255, 255, 255, 0.14) 26%,
    rgba(255, 255, 255, 0.62) 50%,
    rgba(255, 255, 255, 0.14) 74%,
    transparent 100%
  );
}

:is(.hero-cta-section .btn-large):hover::before {
  animation: interactivePrismSweep 1.35s cubic-bezier(0.24, 0.62, 0.22, 1);
}

:is(.hero-cta-section .btn-large .btn-icon) {
  filter: drop-shadow(0 2px 7px rgba(2, 6, 23, 0.36));
}

html[data-theme="light"] :is(.hero-cta-section .btn-large .btn-icon) {
  filter: drop-shadow(0 2px 5px rgba(15, 23, 42, 0.2));
}

@media (prefers-reduced-motion: reduce) {
  :is(
    .btn,
    .action-link,
    .action-button,
    .perspective-link,
    .connect-link,
    .hero-label,
    .reader-action-button,
    .code-copy-button,
    .nav-toggle
  ) {
    transition-duration: 0.01ms !important;
  }

  :is(.footer-links a, .text-link, .back-link, .contact-list a):hover,
  :is(.footer-links a, .text-link, .back-link, .contact-list a):focus-visible,
  :is(.hero-cta-section .btn-large):hover::before {
    animation: none !important;
  }
}

/* ── Footer share button layout & toast ───────────────────────────────────── */

.footer-utility-controls {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  justify-self: end;
  gap: clamp(0.38rem, 0.4vw, 0.62rem);
  position: relative;
}

.footer-share-button {
  position: relative;
  flex: 0 0 auto;
  overflow: hidden;
}

.footer-share-icon {
  position: relative;
  width: 1.125rem;
  height: 1.125rem;
  pointer-events: none;
}

.footer-share-icon svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: opacity 0.2s ease, transform 0.24s cubic-bezier(0.22, 1, 0.36, 1);
}

.footer-share-icon .icon-share-default {
  opacity: 1;
  transform: scale(1);
}

.footer-share-icon .icon-share-check {
  opacity: 0;
  transform: scale(0.62) rotate(-14deg);
}

.footer-share-button.is-success {
  color: oklch(0.74 0.18 150);
}

.footer-share-button.is-success .icon-share-default {
  opacity: 0;
  transform: scale(0.62) rotate(10deg);
}

.footer-share-button.is-success .icon-share-check {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.footer-share-button.is-error {
  color: oklch(0.66 0.2 23);
}

.footer-share-toast {
  position: absolute;
  right: 0;
  bottom: calc(100% + 0.38rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.6rem;
  padding: 0.22rem 0.58rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(7, 12, 24, 0.94);
  color: #f8fafc;
  font-family: var(--font-family-ui, inherit);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 3;
  box-shadow: 0 8px 18px rgba(2, 6, 23, 0.48);
}

.footer-share-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html[data-theme="light"] .footer-share-toast {
  background: rgba(7, 12, 24, 0.94);
  color: #f8fafc;
  border-color: rgba(15, 23, 42, 0.28);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.32);
}

.footer-share-button .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media screen and (max-width: 40rem) {
  .footer-utility-controls {
    gap: 0.45rem;
  }

  .footer-share-toast {
    bottom: calc(100% + 0.3rem);
    font-size: 0.72rem;
    padding: 0.18rem 0.48rem;
  }
}