/* Cursor spotlight, comet trail, card lit-state, About keyword tooltips,
   name-font easter egg, sentence-end punct toggle, email-copy scramble,
   lang-toggle stagger animation, and reveal-on-scroll. */

/* Reveal-on-scroll */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease-out, transform 0.5s ease-out; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* Cursor spotlight */
.spotlight {
  position: fixed;
  pointer-events: none;
  z-index: 1;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.05) 0%,
    rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.018) 45%,
    rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0) 70%);
  transform: translate(-50%, -50%);
  transition: opacity 0.5s ease;
  opacity: 0;
  mix-blend-mode: multiply;
}
.spotlight.on { opacity: 1; }
.spotlight.absorbed { opacity: 0; }

/* Subtle comet trail — small motes that lag behind the cursor */
.spot-trail {
  position: fixed;
  pointer-events: none;
  z-index: 1;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  mix-blend-mode: multiply;
  opacity: 0;
  transition: opacity 0.4s ease;
  will-change: left, top;
}
.spot-trail.on { opacity: 1; }

/* Card glow when spotlight is "absorbed" */
.g-card, .proj-card {
  transition: box-shadow 0.5s ease, transform 0.4s ease, border-color 0.3s ease;
}
.g-frame {
  transition: box-shadow 0.5s ease;
}
.proj-card.lit {
  box-shadow:
    0 0 0 1px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.14),
    0 0 22px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.10),
    0 0 52px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.06),
    0 0 96px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.035);
}
/* Gallery: shadow lives on .g-frame so it isn't clipped by the image fill */
.g-card.lit .g-frame {
  box-shadow:
    0 0 0 1px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.18),
    0 0 22px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.12),
    0 0 52px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.07),
    0 0 96px rgba(var(--glow-r), var(--glow-g), var(--glow-b), 0.04);
}

/* About keyword tooltips */
.kw {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed var(--ink-muted);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.kw:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
.kw .kw-tip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--tooltip-bg);
  color: var(--tooltip-fg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.kw .kw-tip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--tooltip-bg);
}
.kw:hover .kw-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Name font switcher */
.name {
  cursor: pointer;
  transition: font-family 0.3s ease, letter-spacing 0.3s ease;
}
.name[data-font="serif"]   { font-family: 'Georgia', 'Noto Serif JP', serif; letter-spacing: -0.01em; }
.name[data-font="mono"]    { font-family: var(--font-mono); letter-spacing: -0.04em; font-weight: 600; }
.name[data-font="italic"]  { font-style: italic; font-family: 'Georgia', serif; }

/* Sentence-end emoji easter egg */
.punct {
  cursor: pointer;
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.punct:hover { transform: scale(1.4) rotate(-8deg); }
.punct.popped {
  animation: pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.6) rotate(12deg); }
  100% { transform: scale(1) rotate(0); }
}

/* Email copy feedback */
.contact-email { position: relative; cursor: pointer; }
.contact-email .copy-hint {
  position: absolute;
  right: -8px;
  top: -28px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}
.contact-email:hover .copy-hint { opacity: 1; transform: translateY(0); }
.contact-email.copied .copy-hint { color: var(--copy-success); opacity: 1; transform: translateY(0); }
.contact-email .email-text { transition: opacity 0.15s ease; }
.contact-email.scrambling .email-text { font-family: var(--font-mono); letter-spacing: 0.02em; }

/* Lang stagger animation */
.stagger-fade > * {
  display: inline-block;
  opacity: 0;
  transform: translateY(6px);
  animation: staggerIn 0.4s ease-out forwards;
}
@keyframes staggerIn {
  to { opacity: 1; transform: translateY(0); }
}

/* Touch / no-hover: drop hover-only flourishes */
@media (hover: none) {
  .spotlight { display: none; }
  .g-card:hover .g-frame { transform: none; }
  .proj-card:hover { transform: none; }
  .kw .kw-tip,
  .theme-switch button[data-tip]::after,
  .socials a[data-tip]::after { display: none; }
}

@media (max-width: 900px) {
  .spotlight { display: none; }
}