/* ═══════════════════════════════════════════
   MOTION — micro-interaction layer on top of
   base.css (never edits it, only enriches):
   1. loader column wipe + mono counter
   2. circular theme wipe (View Transitions)
   3. curated .button hover system
   Palette: violet #7c3aed / #a78bfa only here.
   ═══════════════════════════════════════════ */

/* ── 1. LOADER — five violet columns rise in from the
   bottom (70ms stagger), hold, then exit upward at
   ~1.75s with the stagger reversed. They sit between
   the radial backdrop (base.css) and .loader-inner. ── */
.loader-cols {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  overflow: hidden;
  pointer-events: none;
}
.loader-cols i {
  display: block;
  width: 20vw;
  height: 100%;
  transform: translateY(100%);
  animation:
    loaderColIn 0.6s var(--ease-out) forwards,
    loaderColOut 0.55s var(--ease-out) forwards;
  will-change: transform;
}
@keyframes loaderColIn {
  to { transform: translateY(0); }
}
@keyframes loaderColOut {
  to { transform: translateY(-101%); }
}
/* first delay = entry (1 → 5), second = exit (5 → 1, inverse) */
.loader-cols i:nth-child(1) {
  animation-delay: 0s, 2.03s;
  background: linear-gradient(180deg, #8b5cf6, #4c1d95);
}
.loader-cols i:nth-child(2) {
  animation-delay: 0.07s, 1.96s;
  background: linear-gradient(180deg, #9161f7, #521f9d);
}
.loader-cols i:nth-child(3) {
  animation-delay: 0.14s, 1.89s;
  background: linear-gradient(180deg, #8654f0, #47188e);
}
.loader-cols i:nth-child(4) {
  animation-delay: 0.21s, 1.82s;
  background: linear-gradient(180deg, #8e5ef5, #4f1d99);
}
.loader-cols i:nth-child(5) {
  animation-delay: 0.28s, 1.75s;
  background: linear-gradient(180deg, #8257ee, #451a89);
}

/* content always above the columns */
.loader-screen .loader-inner {
  position: relative;
  z-index: 2;
}

/* mono counter driven by intro.js (0% → 100%) */
.loader-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.7);
}

/* ── 2. THEME WIPE — circular View Transition growing
   out of the .theme-toggle (theme.js sets --wipe-x/-y). ── */
::view-transition-old(root) {
  animation: none;
}
::view-transition-new(root) {
  animation: themeWipe 0.55s var(--ease-out);
  clip-path: circle(0 at var(--wipe-x, 90%) var(--wipe-y, 40px));
}
@keyframes themeWipe {
  to { clip-path: circle(150vmax at var(--wipe-x, 90%) var(--wipe-y, 40px)); }
}

/* ── 3. BUTTONS — fill sweep + lift + focus ring.
   Doubled selectors out-rank base.css regardless of
   stylesheet order; the ::after sweep paints behind the
   anchor's text (z-index: -1 inside the local context). ── */
.button.button {
  position: relative;
  z-index: 0;
  overflow: hidden;
  transition:
    border-color 0.3s var(--ease-out),
    background 0.3s var(--ease-out),
    color 0.3s var(--ease-out),
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out);
}
.button.button::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  /* secondary: subtle violet-tinted fill sweep */
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-2));
  transform: translateX(-101%);
  transition: transform 0.3s var(--ease-out);
  pointer-events: none;
}
.button--primary.button--primary::after {
  background: linear-gradient(100deg, var(--accent), var(--accent-soft));
}
.button.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -12px rgba(124, 58, 237, 0.45);
}
.button.button:hover::after {
  transform: translateX(0);
}
.button--primary.button--primary:hover {
  color: #ffffff;
}
.button.button:active {
  transform: translateY(0);
}
.button.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ── reduced motion — static loader, no wipe, no sweeps ── */
@media (prefers-reduced-motion: reduce) {
  .loader-cols {
    display: none;
  }
  .loader-cols i {
    animation: none;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }

  .button.button,
  .button.button::after {
    transition: none;
  }
  .button.button::after {
    display: none;
  }
  .button.button:hover {
    transform: none;
    box-shadow: none;
  }
}