/* ===== Variables ===== */
:root {
    --bg: #fff0f6;
    --fg: #3d1a2e;
    --pink-main: #ff6eb0;
    --pink-light: #ffb3d9;
    --pink-mid: #ff8dc7;
    --pink-deep: #d63384;
    --pink-soft: #ffe0f0;
    --gold: #c9a227;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(214, 51, 132, 0.12);
    --radius: 1.5rem;
    --max: 64rem;
  }
  
  /* ===== Reset / Base ===== */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    margin: 0;
    color: var(--fg);
    background: var(--bg);
    font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
  }
  
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  
  a {
    color: inherit;
    text-decoration: none;
  }
  
  h1, h2, h3, p {
    margin: 0;
  }
  
  /* Scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    background: #ffe0ef;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--pink-main);
    border-radius: 4px;
  }
  
  /* ===== Animations ===== */
  @keyframes sparkle {
    0%, 100% { opacity: 1; transform: scale(1) rotate(0deg); }
    50% { opacity: 0.5; transform: scale(1.3) rotate(15deg); }
  }
  
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
  
  @keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
  }
  
  .sparkle {
    animation: sparkle 2s ease-in-out infinite;
  }
  
  .float {
    animation: float 3s ease-in-out infinite;
  }
  
  .heartbeat {
    animation: heartbeat 1.5s ease-in-out infinite;
    display: inline-block;
  }
  
  /* ===== Scroll fade-in（プロフィール以下） ===== */
  @keyframes fade-in-up {
    from {
      opacity: 0;
      transform: translateY(16px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .fade-in {
    opacity: 0;
    transform: translateY(16px);
  }
  
  .fade-in.is-visible {
    animation: fade-in-up 0.65s ease forwards;
    animation-delay: var(--fade-delay, 0ms);
  }
  
  @media (prefers-reduced-motion: reduce) {
    .fade-in {
      opacity: 1;
      transform: none;
    }
  
    .fade-in.is-visible {
      animation: none;
    }
  }
  
  /* ===== Layout helpers ===== */
  .container {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  .container-narrow {
    max-width: 48rem;
  }
  
  .section {
    padding: 5rem 1rem;
    background: rgba(255, 240, 246, 0.82);
  }
  
  .section-alt {
    background: linear-gradient(
      135deg,
      rgba(255, 240, 246, 0.78) 0%,
      rgba(255, 232, 243, 0.82) 100%
    );
  }
  
  .section-header {
    text-align: center;
    margin-bottom: 3rem;
  }
  
  .section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 900;
    color: var(--pink-deep);
  }
  
  .section-line {
    width: 6rem;
    height: 4px;
    margin: 0.75rem auto 0;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--pink-main), var(--pink-light));
  }
  
  .section-sub {
    margin-top: 1rem;
    color: var(--pink-main);
    font-size: 0.9rem;
  }
  
  .eyebrow {
    color: var(--pink-main);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
  }
  
  .emoji-lg {
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  
  .emoji-xl {
    font-size: 3.5rem;
    margin-bottom: 0.75rem;
  }
  
  .card {
    background: rgba(255, 255, 255, 0.8);
    border: 2px solid #fbcfe8;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
  }
  
  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  }
  
  .btn:hover {
    transform: scale(1.05);
  }
  
  .btn-primary {
    color: var(--white);
    background: linear-gradient(90deg, var(--pink-main), var(--pink-mid));
    box-shadow: 0 8px 20px rgba(255, 110, 176, 0.35);
  }
  
  .btn-primary:hover {
    box-shadow: 0 12px 28px rgba(255, 110, 176, 0.45);
  }
  
  .btn-outline {
    color: var(--pink-main);
    background: rgba(255, 255, 255, 0.7);
    border: 2px solid #f472b6;
  }
  
  .btn-outline:hover {
    background: #fdf2f8;
  }
  
  .btn-youtube {
    color: var(--white);
    background: linear-gradient(90deg, #ff0000, #cc0000);
    box-shadow: 0 8px 20px rgba(255, 0, 0, 0.25);
  }
  
  /* ===== Header ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 2px solid #fbcfe8;
    box-shadow: 0 1px 8px rgba(214, 51, 132, 0.06);
  }
  
  .header-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0.55rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }

  .logo-link {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    min-width: 0;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .logo-link:hover {
    transform: translateY(-1px);
    opacity: 0.92;
  }

  .header-logo-mark {
    flex-shrink: 0;
    width: 2.75rem;
    height: 2.75rem;
    object-fit: cover;
    border-radius: 0.85rem;
    border: 2px solid #fce7f3;
    box-shadow: 0 4px 12px rgba(214, 51, 132, 0.18);
    background: #fff;
  }

  .logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.05rem;
    min-width: 0;
    line-height: 1.15;
  }

  .logo-name {
    font-size: 1.05rem;
    font-weight: 900;
    letter-spacing: 0.02em;
    color: var(--pink-deep);
  }

  .logo-sub {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--pink-main);
    opacity: 0.85;
  }

  .header-logo {
    height: 3.5rem;
    width: auto;
    object-fit: contain;
  }
  
  .nav-desktop {
    display: none;
    align-items: center;
    gap: 1.5rem;
  }
  
  .nav-desktop a {
    position: relative;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--pink-main);
    transition: color 0.2s;
  }
  
  .nav-desktop a:hover {
    color: var(--pink-deep);
  }
  
  .nav-desktop a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: #f472b6;
    border-radius: 999px;
    transition: width 0.2s;
  }
  
  .nav-desktop a:hover::after {
    width: 100%;
  }
  
  .menu-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--pink-main);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
  }
  
  .nav-mobile {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.95);
    border-top: 1px solid #fce7f3;
  }
  
  .nav-mobile[hidden] {
    display: none;
  }
  
  .nav-mobile a {
    font-size: 1rem;
    font-weight: 700;
    color: var(--pink-main);
  }
  
  @media (min-width: 768px) {
    .nav-desktop {
      display: flex;
    }
  
    .menu-toggle {
      display: none;
    }
  
    .nav-mobile {
      display: none !important;
    }
  }
  
  /* ===== Hero ===== */
  .hero {
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(
      135deg,
      rgba(255, 224, 240, 0.72) 0%,
      rgba(255, 240, 246, 0.68) 40%,
      rgba(255, 214, 237, 0.72) 100%
    );
  }
  
  .hero-decor {
    position: absolute;
    inset: 0;
    pointer-events: none;
    user-select: none;
  }
  
  .decor-1 { position: absolute; top: 2.5rem; left: 2.5rem; color: #f9a8d4; font-size: 1.75rem; }
  .decor-2 { position: absolute; top: 5rem; right: 5rem; color: #f9a8d4; font-size: 1.75rem; animation-delay: 0.5s; }
  .decor-3 { position: absolute; bottom: 4rem; left: 25%; color: #f9a8d4; font-size: 1.75rem; animation-delay: 1s; }
  .decor-4 { position: absolute; top: 33%; right: 33%; color: #f9a8d4; font-size: 1.75rem; animation-delay: 1.5s; }
  
  .decor-big-heart,
  .decor-big-star {
    position: absolute;
    color: #fce7f3;
    user-select: none;
  }
  
  .decor-big-heart {
    top: -2.5rem;
    right: -2.5rem;
    font-size: 12rem;
  }
  
  .decor-big-star {
    bottom: -2.5rem;
    left: -2.5rem;
    font-size: 9rem;
  }
  
  .hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
    padding: 5rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
  }
  
  .hero-text {
    flex: 1;
    text-align: center;
  }
  
  .hero-text h1 {
    font-size: clamp(2.75rem, 8vw, 3.75rem);
    font-weight: 900;
    color: var(--pink-deep);
    line-height: 1.15;
    margin-bottom: 1rem;
  }
  
  .hero-text .lead {
    color: #db2777;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 28rem;
    margin-left: auto;
    margin-right: auto;
  }
  
  .cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }
  
  .hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
  }
  
  .hero-glow {
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background: var(--pink-main);
    filter: blur(40px);
    opacity: 0.4;
  }
  
  .hero-logo {
    position: relative;
    border-radius: var(--radius);
    box-shadow: 0 20px 50px rgba(214, 51, 132, 0.25);
    border: 4px solid rgba(255, 255, 255, 0.8);
  }
  
  .hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    line-height: 0;
    pointer-events: none;
  }
  
  .hero-wave svg {
    width: 100%;
    height: 60px;
    display: block;
  }

  .hero-wave path {
    fill: rgba(255, 240, 246, 0.55);
  }
  
  @media (min-width: 768px) {
    .hero-content {
      flex-direction: column;
    }
  
    .hero-text {
      text-align: center;
    }
  
    .hero-text .lead {
      margin-left: auto;
      margin-right: auto;
    }
  
    .cta-group {
      justify-content: center;
    }
  }
  
  /* ===== Profile ===== */
  .profile-grid {
    display: grid;
    gap: 2.5rem;
  }
  
  @media (min-width: 768px) {
    .profile-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  .profile-card {
    position: relative;
    overflow: hidden;
  }
  
  .profile-mascot {
    position: absolute;
    top: 0.65rem;
    right: 0.75rem;
    font-size: 2rem;
    line-height: 1;
    z-index: 1;
    pointer-events: none;
  }

  .message-card {
    position: relative;
  }

  .message-card > .emoji-lg {
    position: absolute;
    top: 0.65rem;
    right: 0.75rem;
    margin: 0;
    line-height: 1;
    z-index: 1;
    pointer-events: none;
  }
  
  .profile-card h3,
  .message-card h3 {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--pink-deep);
    margin-bottom: 0.5rem;
    padding-right: 2.75rem;
  }
  
  .profile-en {
    color: var(--pink-main);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
  }
  
  .profile-list {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 0.9rem;
  }
  
  .profile-list div {
    display: flex;
    gap: 0.75rem;
  }
  
  .profile-list dt {
    width: 6rem;
    flex-shrink: 0;
    font-weight: 700;
    color: var(--pink-main);
  }
  
  .profile-list dd {
    margin: 0;
    color: #374151;
  }
  
  .tags {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  
  .tags span {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(90deg, var(--pink-main), var(--pink-mid));
  }
  
  .message-card p {
    color: #4b5563;
    font-size: 0.9rem;
    margin-bottom: 1rem;
  }
  
  .note-box {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 1rem;
    background: #fdf2f8;
    border: 1px solid #fbcfe8;
  }
  
  .note-box p {
    margin: 0;
    color: var(--pink-main);
    font-weight: 700;
    font-size: 0.9rem;
  }
  
  /* ===== Activity ===== */
  .activity-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }
  
  @media (min-width: 640px) {
    .activity-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  @media (min-width: 1024px) {
    .activity-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }
  
  .activity-card {
    position: relative;
    transition: transform 0.2s;
  }
  
  .activity-card:hover {
    transform: scale(1.05);
  }

  .activity-card > .emoji-lg {
    position: absolute;
    top: 0.65rem;
    right: 0.75rem;
    margin: 0;
    line-height: 1;
    z-index: 1;
    pointer-events: none;
  }
  
  .activity-card h3 {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--pink-main);
    margin-bottom: 0.5rem;
    padding-right: 2.75rem;
  }
  
  .activity-card:nth-child(2) h3 { color: var(--pink-mid); }
  .activity-card:nth-child(3) h3 { color: var(--gold); }
  .activity-card:nth-child(4) h3 { color: #9b59b6; }
  
  .activity-card p {
    color: #4b5563;
    font-size: 0.875rem;
  }
  
  .youtube-box {
    margin-top: 4rem;
    text-align: center;
  }
  
  .youtube-box > h3 {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--pink-deep);
    margin-bottom: 1.5rem;
  }
  
  .youtube-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .youtube-card p {
    color: var(--pink-main);
    font-weight: 700;
  }
  
  /* ===== Gallery ===== */
  .gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  @media (min-width: 768px) {
    .gallery-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .gallery-item {
    aspect-ratio: 1;
    border-radius: 1rem;
    border: 2px dashed #f9a8d4;
    background: #fdf2f8;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 2.5rem;
    transition: background 0.2s;
  }
  
  .gallery-item:hover {
    background: #fce7f3;
  }
  
  .gallery-item span {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--pink-main);
  }
  
  .gallery-note {
    margin-top: 2.5rem;
    text-align: center;
    color: var(--pink-main);
    font-size: 0.9rem;
  }
  
  .gallery-note a {
    font-weight: 700;
    text-decoration: underline;
  }
  
  .gallery-note a:hover {
    color: var(--pink-deep);
  }
  
  /* ===== Links ===== */
  .links-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .link-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    border-radius: 1rem;
    font-weight: 700;
    box-shadow: var(--shadow);
    border: 2px solid rgba(255, 255, 255, 0.5);
    transition: transform 0.2s, box-shadow 0.2s;
  }
  
  .link-card:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 36px rgba(214, 51, 132, 0.18);
  }
  
  .link-icon {
    width: 2rem;
    text-align: center;
    font-size: 1.5rem;
  }
  
  .link-text {
    display: flex;
    flex-direction: column;
  }
  
  .link-text strong {
    font-size: 1.1rem;
  }
  
  .link-text small {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.7;
    margin-top: 0.15rem;
  }
  
  .link-arrow {
    margin-left: auto;
    opacity: 0.6;
  }
  
  .link-fanbox { background: #f5f5f5; color: #000; }
  .link-x { background: #f5f5f5; color: #000; }
  .link-youtube { background: #ff0000; color: #fff; }
  .link-twitch { background: #9146ff; color: #fff; }
  .link-tiktok { background: #010101; color: #fff; }
  
  .contact-card {
    margin-top: 3rem;
    text-align: center;
  }
  
  .contact-card h3 {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--pink-deep);
    margin-bottom: 0.5rem;
  }
  
  .contact-card p {
    color: #4b5563;
    font-size: 0.9rem;
    margin-bottom: 1rem;
  }
  
  /* ===== Footer ===== */
  .site-footer {
    padding: 2.5rem 1rem;
    text-align: center;
    background: #3d1a2e;
    color: var(--pink-light);
  }
  
  .footer-title {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--pink-mid);
    margin-bottom: 0.25rem;
  }
  
  .footer-en {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    opacity: 0.7;
    margin-bottom: 1.5rem;
  }
  
  .footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
  }
  
  .footer-nav a:hover {
    color: #f9a8d4;
  }
  
  .footer-line {
    width: 6rem;
    height: 1px;
    margin: 0 auto 1.5rem;
    background: var(--pink-mid);
    opacity: 0.3;
  }
  
  .copyright {
    font-size: 0.75rem;
    opacity: 0.5;
  }