/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #fdf6ff;
  --bg-alt:     #f3e8ff;
  --bg-card:    #ffffff;

  --primary:    #c084fc;
  --primary-lt: #e9d5ff;
  --primary-dk: #9333ea;

  --pink:       #f9a8d4;
  --pink-dk:    #ec4899;

  --text-h:     #3b1d6e;
  --text-b:     #5b4080;
  --text-m:     #a78bbd;

  --border:     rgba(192, 132, 252, 0.25);
  --shadow-sm:  rgba(168, 85, 247, 0.10);
  --shadow-md:  rgba(168, 85, 247, 0.20);

  --grad-bg:    linear-gradient(135deg, #fdf6ff 0%, #f3e8ff 55%, #ede9fe 100%);
  --grad-btn:   linear-gradient(135deg, #c084fc, #f9a8d4);
  --grad-title: linear-gradient(135deg, #9333ea 0%, #ec4899 100%);
  --grad-card:  linear-gradient(90deg, #c084fc, #f9a8d4);
}

html { scroll-behavior: smooth; scroll-padding-top: 70px; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text-b);
  line-height: 1.8;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============================================================
   Nav
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 58px;
  background: rgba(253, 246, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: height 0.3s ease, box-shadow 0.3s ease;
}

.nav.nav-scrolled {
  height: 50px;
  box-shadow: 0 2px 16px rgba(168, 85, 247, 0.12);
}

.nav-logo {
  font-family: 'Nunito', 'Noto Sans JP', sans-serif;
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--primary-dk);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-m);
  letter-spacing: 0.04em;
  transition: color 0.2s;
  padding: 0.25rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  border-radius: 9999px;
  background: var(--grad-btn);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active { color: var(--primary-dk); }

.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.nav-links a:focus-visible {
  outline: 2px solid #9333ea;
  outline-offset: 3px;
  border-radius: 4px;
}

/* Hamburger — mobile only */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 9999px;
  background: var(--primary-dk);
  transition: transform 0.25s, opacity 0.25s;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 58px;
  overflow: hidden;
  background: var(--grad-bg);
}

.hero-blobs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-blobs::before {
  content: '';
  position: absolute;
  width: 560px; height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 168, 212, 0.38) 0%, transparent 68%);
  bottom: -160px; right: -120px;
  animation: blob-float 7s ease-in-out infinite;
  will-change: transform;
}

.hero-blobs::after {
  content: '';
  position: absolute;
  width: 380px; height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.28) 0%, transparent 68%);
  top: 40px; left: -100px;
  animation: blob-float 9s ease-in-out infinite reverse;
  will-change: transform;
}

@keyframes blob-float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-18px) scale(1.03); }
}

@keyframes img-float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 5rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
  width: 100%;
}

.hero-text { flex: 1; min-width: 0; }

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'Nunito', sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pink-dk);
  background: rgba(249, 168, 212, 0.18);
  border: 1px solid rgba(236, 72, 153, 0.22);
  border-radius: 9999px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.4rem;
}

.hero-title {
  font-family: 'Nunito', 'Noto Sans JP', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin-bottom: 1.4rem;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-b);
  line-height: 1.95;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero visual */
.hero-visual {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.game-frame {
  position: relative;
  width: min(340px, 40vw);
  border-radius: 24px;
  overflow: hidden;
  border: 2px solid rgba(192, 132, 252, 0.35);
  box-shadow:
    0 0 0 6px rgba(192, 132, 252, 0.08),
    0 12px 48px rgba(168, 85, 247, 0.28),
    0 4px 16px rgba(168, 85, 247, 0.12);
  outline: 4px solid rgba(192, 132, 252, 0.12);
  outline-offset: 6px;
  animation: img-float 5s ease-in-out infinite;
  will-change: transform;
}

.game-frame img { width: 100%; height: auto; display: block; }

.game-frame-shine {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: linear-gradient(
    135deg,
    rgba(255,255,255,0.14) 0%,
    transparent 50%,
    rgba(192,132,252,0.06) 100%
  );
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--primary-dk);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 0.35rem 1rem;
  box-shadow: 0 2px 12px var(--shadow-sm);
}

.hero-badge-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--pink-dk);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.8); }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2.1rem;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 700;
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 4px 20px rgba(192, 132, 252, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(192, 132, 252, 0.55);
}

.btn-primary:active { transform: translateY(-1px); }

.btn-primary:focus-visible,
.btn-outline:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid #9333ea;
  outline-offset: 3px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.84rem;
  font-weight: 700;
  border: 1.5px solid rgba(192, 132, 252, 0.5);
  color: var(--primary-dk);
  background: transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-outline:hover {
  background: rgba(192, 132, 252, 0.1);
  border-color: var(--primary-dk);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.85rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-b);
  border: 1.5px solid var(--border);
  background: rgba(255,255,255,0.7);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-ghost:hover {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary-dk);
  transform: translateY(-2px);
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 7rem 0; }

.section-alt { background: var(--bg-alt); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-title {
  font-family: 'Nunito', 'Noto Sans JP', sans-serif;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 900;
  text-align: center;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}

.section-sub {
  text-align: center;
  color: var(--text-m);
  font-size: 0.9rem;
  margin-bottom: 3.5rem;
}

/* ============================================================
   Works
   ============================================================ */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.card-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* ============================================================
   Card
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 4px 24px var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-card);
  z-index: 1;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px var(--shadow-md);
}

.card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.card-featured .card-img-wrap {
  aspect-ratio: auto;
  height: 100%;
  min-height: 420px;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  transition: transform 0.45s ease;
}

.card:hover .card-img-wrap img { transform: scale(1.04); }

.card-badge {
  position: absolute;
  top: 1rem; left: 1rem;
  padding: 0.28rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--grad-btn);
  color: #fff;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(192,132,252,0.35);
}

.card-body {
  padding: 2rem 2rem 2.2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-content: center;
  gap: 1.1rem;
}

.card-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pink-dk);
  margin-bottom: 0.3rem;
}

.card-title {
  font-family: 'Nunito', 'Noto Sans JP', sans-serif;
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-h);
  line-height: 1.3;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-b);
  line-height: 1.88;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
}

.card-tags li {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid rgba(192, 132, 252, 0.35);
  color: var(--primary-dk);
  background: var(--bg-alt);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.card-tags li:hover {
  background: var(--primary-lt);
  border-color: var(--primary);
  transform: scale(1.05);
}

.card-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Placeholder */
.card-placeholder {
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed rgba(192, 132, 252, 0.3);
  background: rgba(243, 232, 255, 0.35);
  box-shadow: none;
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}

.card-placeholder::before { display: none; }

.card-placeholder:hover {
  border-color: var(--primary);
  background: rgba(233, 213, 255, 0.45);
  transform: translateY(-4px);
}

.card-placeholder-inner {
  text-align: center;
  color: var(--text-m);
}

.placeholder-icon {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.5;
  margin-bottom: 0.6rem;
}

/* ============================================================
   Process
   ============================================================ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.process-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.process-step::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-card);
}

.process-step:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 36px var(--shadow-md);
}

.process-num {
  font-family: 'Nunito', sans-serif;
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.22;
  margin-bottom: 0.9rem;
}

.process-step h3 {
  font-family: 'Nunito', 'Noto Sans JP', sans-serif;
  font-size: 1.05rem;
  font-weight: 900;
  margin-bottom: 0.8rem;
  color: var(--text-h);
}

.process-step p {
  font-size: 0.87rem;
  color: var(--text-b);
  line-height: 1.92;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-inner { text-align: center; }

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  text-align: center;
  padding: 2.2rem 2rem;
  font-size: 0.8rem;
  color: var(--text-m);
  border-top: 1px solid var(--border);
  background: linear-gradient(to top, var(--bg-alt), var(--bg));
}

.footer-link {
  color: var(--primary-dk);
  font-weight: 700;
  transition: opacity 0.2s;
}

.footer-link:hover { opacity: 0.7; }

/* ============================================================
   Scroll animation
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Hamburger nav (mobile open state)
   ============================================================ */
@media (max-width: 600px) {
  .nav-links.nav-open {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: fixed;
    top: 58px; left: 0; right: 0;
    background: rgba(253, 246, 255, 0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    z-index: 99;
  }

  .nav-links.nav-open li { display: block; }

  .nav-links.nav-open a {
    display: block;
    padding: 0.85rem 2rem;
    font-size: 1rem;
  }
}

/* ============================================================
   Responsive
   ============================================================ */
/* Tablet: 2-column works grid (YAML: works_grid.tablet = "2カラム") */
@media (max-width: 960px) and (min-width: 601px) {
  .works-grid {
    grid-template-columns: 1fr 1fr;
  }

  .card-featured {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
  }

  .card-featured .card-img-wrap {
    aspect-ratio: 16 / 9;
    height: auto;
    min-height: unset;
  }
}

@media (max-width: 960px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 3rem;
  }

  .hero-actions { justify-content: center; }

  .hero-visual { width: 100%; }

  .game-frame {
    width: min(300px, 68vw);
    margin: 0 auto;
  }

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

/* Mobile: single column */
@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .section { padding: 5rem 0; }

  .hero-title { font-size: 2.1rem; }

  .hero-blobs::before { width: 320px; height: 320px; }
  .hero-blobs::after  { width: 240px; height: 240px; }

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

  .card-featured {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .card-featured .card-img-wrap {
    aspect-ratio: 16 / 9;
    height: auto;
    min-height: unset;
  }

  .card-body { padding: 1.5rem 1.5rem 1.8rem; }
}

/* Large screen: slightly larger game frame */
@media (min-width: 1100px) {
  .game-frame { width: min(380px, 42vw); }
}

/* Respect user motion preference */
@media (prefers-reduced-motion: reduce) {
  .game-frame,
  .hero-blobs::before,
  .hero-blobs::after { will-change: auto; }

  .game-frame,
  .hero-blobs::before,
  .hero-blobs::after,
  .hero-badge-dot { animation: none; }

  .fade-in {
    transition: opacity 0.3s ease;
    transform: none;
  }

  .fade-in.visible { opacity: 1; }
}