/* ============================================================
   THEME V2 — overlay theme for shuheiokazaki.com
   This file only ADDS on top of style.css / purrdon.css.
   Remove the <link> to revert the site to its original look.
   ============================================================ */

:root {
  --accent: #ffb86c;            /* warm amber — cat color */
  --accent-2: #a78bfa;          /* soft violet, secondary */
  --accent-soft: rgba(255, 184, 108, 0.16);
  --accent-line: rgba(255, 184, 108, 0.45);
  --accent-glow: rgba(255, 184, 108, 0.10);
}

/* ---------- Text selection ---------- */
::selection {
  background: var(--accent);
  color: #000;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.14);
  border-radius: 99px;
  border: 2px solid #000;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-line); }

/* ---------- Scroll progress bar (filled by theme-v2.js) ---------- */
.tv2-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  z-index: 10010;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px var(--accent-glow);
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ---------- Hero: shimmering name ---------- */
.hero__name-en {
  background: linear-gradient(110deg,
    #fff 0%, #fff 38%,
    var(--accent) 50%,
    #fff 62%, #fff 100%);
  background-size: 220% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: tv2-shimmer 7s ease-in-out infinite;
}

@keyframes tv2-shimmer {
  0%, 55%, 100% { background-position: 100% 0; }
  72%, 84%      { background-position: 0% 0; }
}

/* hero roles: gentle letter-spacing breathe on load */
.hero__roles {
  animation: tv2-tracking-in 1.6s cubic-bezier(0.22, 1, 0.36, 1) both;
  animation-delay: 0.4s;
}
@keyframes tv2-tracking-in {
  0% { letter-spacing: 8px; opacity: 0; }
  100% { letter-spacing: 3px; opacity: 1; }
}

/* ---------- Fireflies (spawned by theme-v2.js inside .hero) ---------- */
.tv2-firefly {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  filter: blur(0.5px);
  box-shadow: 0 0 8px 2px var(--accent-glow);
  animation:
    tv2-drift var(--fly-dur, 14s) ease-in-out var(--fly-delay, 0s) infinite alternate,
    tv2-twinkle calc(var(--fly-dur, 14s) / 3) ease-in-out var(--fly-delay, 0s) infinite;
}
@keyframes tv2-drift {
  from { transform: translate(0, 0); }
  to   { transform: translate(var(--fly-dx, 40px), var(--fly-dy, -60px)); }
}
@keyframes tv2-twinkle {
  0%, 100% { opacity: 0; }
  50% { opacity: var(--fly-max, 0.6); }
}

/* ---------- Sidebar nav: accent slide ---------- */
.sidebar__link {
  position: relative;
  transition: color 0.3s, padding-left 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.sidebar__link::before {
  content: '';
  position: absolute;
  left: -14px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-50%) scale(0);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.sidebar__link:hover { padding-left: 4px; }
.sidebar__link:hover::before,
.sidebar__link--active::before { transform: translateY(-50%) scale(1); }
.sidebar__link--active { padding-left: 4px; }

/* ---------- Dividers: subtle accent fade ---------- */
.divider {
  background: linear-gradient(90deg,
    var(--accent-line) 0%,
    var(--gray-line) 22%,
    var(--gray-line) 100%);
}

/* ---------- Section headings: accent period ---------- */
.section__heading::after {
  content: '.';
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
}

/* ---------- LATEST teaser ---------- */
.hero__latest-item {
  border-radius: 6px;
  transition: var(--transition), transform 0.3s;
}
.hero__latest-item:hover { transform: translateX(6px); }
.hero__latest-item time { transition: color 0.3s; }
.hero__latest-item:hover time { color: var(--accent); }

/* ---------- Information rows ---------- */
.info-item { border-radius: 6px; }
.info-item:hover .info-item__date { color: var(--accent); }
.info-item__date { transition: color 0.3s; }

/* ---------- Books grid: lift + tilt + glow ---------- */
.books-grid__item {
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.45s,
              filter 0.45s;
  border-radius: 4px;
}
.books-grid__item:hover {
  transform: translateY(-8px) rotate(-1.2deg) scale(1.03);
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.55),
    0 0 24px var(--accent-glow);
  filter: brightness(1.06);
  z-index: 2;
  position: relative;
}

/* ---------- YouTube cards ---------- */
.youtube-card {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  transition: var(--transition), transform 0.35s;
}
.youtube-card::after {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.youtube-card:hover { transform: translateX(4px); }
.youtube-card:hover::after { transform: scaleY(1); }
.youtube-card__arrow { transition: transform 0.3s, color 0.3s; }
.youtube-card:hover .youtube-card__arrow {
  transform: translateX(5px);
  color: var(--accent);
}

/* ---------- App showcase cards ---------- */
.app-showcase {
  position: relative;
  border: 1px solid var(--gray-line);
  border-radius: 14px;
  padding: 32px 32px 28px;
  margin-bottom: 28px;
  background: rgba(255,255,255,0.015);
  transition: border-color 0.4s, box-shadow 0.4s, transform 0.4s;
  overflow: hidden;
}
.app-showcase::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.app-showcase:hover {
  border-color: rgba(255, 184, 108, 0.35);
  box-shadow: 0 14px 44px rgba(0,0,0,0.5), 0 0 32px var(--accent-glow);
  transform: translateY(-3px);
}
.app-showcase:hover::before { opacity: 1; }

.app-showcase__icon img {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  border-radius: 12px;
}
.app-showcase:hover .app-showcase__icon img {
  transform: scale(1.1) rotate(-4deg);
}

.app-showcase__link {
  transition: var(--transition), padding-left 0.3s;
}
.app-showcase__link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Workflow ---------- */
.workflow {
  background: linear-gradient(160deg,
    rgba(255, 184, 108, 0.04),
    rgba(167, 139, 250, 0.04) 60%,
    rgba(255,255,255,0.015));
}
.workflow__node {
  transition: border-color 0.35s, transform 0.35s, box-shadow 0.35s;
}
.workflow__node:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.4);
}
.workflow__arrow {
  color: var(--accent);
  animation: tv2-nudge 2.4s ease-in-out infinite;
}
@keyframes tv2-nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}
@media (max-width: 640px) {
  .workflow__arrow { animation: tv2-nudge-y 2.4s ease-in-out infinite; }
  @keyframes tv2-nudge-y {
    0%, 100% { transform: rotate(90deg) translateX(0); }
    50% { transform: rotate(90deg) translateX(4px); }
  }
}

/* ---------- Profile photo: accent ring ---------- */
.profile__photo {
  transition: box-shadow 0.5s, transform 0.5s;
}
.profile__photo:hover {
  box-shadow: 0 0 0 3px #000, 0 0 0 5px var(--accent-line), 0 12px 36px var(--accent-glow);
  transform: scale(1.04);
}

.profile__links a {
  transition: var(--transition);
}
.profile__links a:hover { color: var(--accent); }

/* ============================================================
   SUB PAGES (purrdon-page)
   ============================================================ */

/* Sub-page hero title: static gradient */
.purrdon-hero__title {
  background: linear-gradient(135deg, #fff 55%, var(--accent) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Sub-page header: gradient hairline under fixed bar */
.purrdon-header {
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, var(--accent-line), var(--gray-line) 40%) 1;
}
.purrdon-header__back { transition: var(--transition); }
.purrdon-header__back:hover { color: var(--accent); }

/* Hero icons: gentle float */
.purrdon-hero__icon {
  animation: tv2-float 5s ease-in-out infinite;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}
@keyframes tv2-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* CTA buttons */
.purrdon-hero__cta,
.purrdon-cta__link {
  position: relative;
  transition: var(--transition);
}
.purrdon-hero__cta:hover,
.purrdon-cta__link:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-shadow: 0 0 24px var(--accent-glow);
}

/* Feature list: hover reveal */
.purrdon-features__item {
  border-radius: 8px;
  transition: background 0.35s, padding 0.35s, margin 0.35s;
}
.purrdon-features__item:hover {
  background: var(--gray-hover);
  padding-left: 14px;
  margin-left: -14px;
  padding-right: 14px;
  margin-right: -14px;
}
.purrdon-features__emoji {
  display: inline-block;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.purrdon-features__item:hover .purrdon-features__emoji {
  transform: scale(1.25) rotate(-8deg);
}
.purrdon-features__name small {
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 1px 7px;
  border-radius: 99px;
  font-size: 0.6em;
  vertical-align: middle;
  margin-left: 6px;
}

/* Steps: accent numbers */
.purrdon-steps__num {
  color: var(--accent);
  border-color: var(--accent-line) !important;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}
.purrdon-steps__item:hover .purrdon-steps__num {
  background: var(--accent);
  color: #000;
  transform: scale(1.1);
}

/* Plans: hover lift + accent border */
.purrdon-plan {
  border: 1px solid transparent;
  border-top: 1px solid var(--gray-line);
  border-radius: 10px;
  padding: 28px 18px 18px;
  margin: -1px -18px 0;
  transition: border-color 0.4s, background 0.4s, transform 0.4s, box-shadow 0.4s;
}
.purrdon-plan:hover {
  border-color: var(--accent-line);
  background: rgba(255, 184, 108, 0.03);
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0,0,0,0.45);
}
.purrdon-plan__price { transition: color 0.3s; }
.purrdon-plan:hover .purrdon-plan__price { color: var(--accent); }

/* Expression cards */
.expr-card {
  transition: border-color 0.35s, background 0.35s,
              transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.35s;
}
.expr-card:hover {
  border-color: var(--accent-line);
  box-shadow: 0 12px 32px rgba(0,0,0,0.45), 0 0 20px var(--accent-glow);
  transform: translateY(-4px);
}
.expr-card__type {
  transition: color 0.3s, border-color 0.3s;
}
.expr-card:hover .expr-card__type {
  color: var(--accent);
  border-color: var(--accent-line);
}

/* Expression filter pills */
.expr-filter__btn {
  transition: var(--transition), transform 0.2s;
}
.expr-filter__btn:hover { transform: translateY(-1px); }
.expr-filter__btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

/* Search box focus */
.expr-search__input:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Expression detail */
.expr-detail__type {
  color: var(--accent);
  border-color: var(--accent-line);
}
.expr-example {
  border-left: 3px solid var(--accent-line);
  transition: background 0.3s, border-color 0.3s;
}
.expr-example:hover {
  background: rgba(255, 184, 108, 0.04);
}

/* Blog list */
.blog-list__link { transition: var(--transition); }
.blog-list__link:hover .blog-list__date { color: var(--accent); }
.blog-list__date { transition: color 0.3s; }
.blog-list__category { transition: color 0.3s, border-color 0.3s; }
.blog-list__link:hover .blog-list__category {
  color: var(--accent);
  border-color: var(--accent-line);
}

/* Article body links */
.article__body a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Support list cards */
.support-list__link {
  transition: var(--transition), transform 0.35s, box-shadow 0.35s;
}
.support-list__link:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4), 0 0 20px var(--accent-glow);
}
.support-list__arrow { transition: transform 0.3s, color 0.3s; }
.support-list__link:hover .support-list__arrow {
  transform: translateX(5px);
  color: var(--accent);
}

/* Editor */
.editor-input:focus,
.editor-textarea:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.editor-button--primary {
  transition: var(--transition), box-shadow 0.3s;
}
.editor-button--primary:hover:not([disabled]) {
  box-shadow: 0 0 24px var(--accent-glow);
}

/* Contact form */
.cf-input:focus,
.cf-textarea:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.cf-submit {
  transition: var(--transition), box-shadow 0.3s, transform 0.2s;
}
.cf-submit:hover {
  box-shadow: 0 0 28px var(--accent-glow);
  transform: translateY(-1px);
}
.cf-checkbox { accent-color: var(--accent); }

/* Footer links */
.purrdon-footer__links a:hover { color: var(--accent); }

/* Reveal-on-scroll for sub pages (gated behind body.tv2-animate set by JS) */
body.tv2-animate .purrdon-features__item,
body.tv2-animate .purrdon-steps__item,
body.tv2-animate .purrdon-plan,
body.tv2-animate .expr-card,
body.tv2-animate .blog-list__item,
body.tv2-animate .faq-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              background 0.35s, padding 0.35s, margin 0.35s,
              border-color 0.35s, box-shadow 0.35s;
}
body.tv2-animate .tv2-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Reduced motion: turn it all off ---------- */
@media (prefers-reduced-motion: reduce) {
  .hero__name-en,
  .hero__roles,
  .tv2-firefly,
  .purrdon-hero__icon,
  .workflow__arrow {
    animation: none !important;
  }
  .hero__name-en {
    background: none;
    -webkit-text-fill-color: var(--white);
  }
  body.tv2-animate .purrdon-features__item,
  body.tv2-animate .purrdon-steps__item,
  body.tv2-animate .purrdon-plan,
  body.tv2-animate .expr-card,
  body.tv2-animate .blog-list__item,
  body.tv2-animate .faq-item {
    opacity: 1;
    transform: none;
  }
}