@font-face {
  font-family: 'Noto Sans JP';
  src: url('../font/NotoSansJP-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans JP';
  src: url('../font/NotoSansJP-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans JP';
  src: url('../font/NotoSansJP-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* レイアウト全体の安定化 */
* {
  box-sizing: border-box;
}

/* 変数化で高さ管理を統一 */
:root {
  --header-h: 80px;
  --footer-h: 60px;
  --bg: #050505;
  --surface: #101010;
  --surface-hover: #181818;
  --text: #ffffff;
  --text-muted: #e2e2e2;
  --note: #d0d0d0;
  --border: #3a3a3a;
  --accent: #ffd700;
  --accent-soft: rgba(255, 215, 0, 0.14);
  --focus-ring: #7dd3fc;
  --content-w: 38rem;
}

/* body */
body {
  font-family: 'Noto Sans JP', 'Helvetica Neue', 'Arial', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  text-align: center;
  line-height: 1.75;
  font-size: 16px;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  transform: translateY(-180%);
  background-color: #ffffff;
  color: #000000;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  z-index: 2000;
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.entry-body {
  min-height: 100vh;
}

.entry-main {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.entry-card {
  max-width: 42rem;
}

.entry-summary {
  margin-bottom: 1.5rem;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.9rem 1.4rem;
  border: 2px solid var(--accent);
  border-radius: 999px;
  background-color: var(--accent-soft);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.primary-link:hover {
  background-color: rgba(255, 215, 0, 0.22);
}

.primary-link:focus-visible {
  background-color: rgba(255, 215, 0, 0.22);
}

/* ===== header ===== */
header {
  background-color: rgba(5, 5, 5, 0.96);
  color: var(--text);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.25rem;
  backdrop-filter: blur(10px);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  background-color: var(--surface);
  color: var(--text);
  min-width: 52px;
  min-height: 52px;
  padding: 0.4rem 0.55rem;
  cursor: pointer;
}

.menu-toggle-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
}

nav ul li {
  margin: 0;
}

nav ul li a {
  color: var(--text);
  text-decoration-line: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
  font-size: 1rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, text-decoration-color 0.2s ease, color 0.2s ease;
}

nav ul li a:hover {
  color: var(--text);
  background-color: var(--surface-hover);
  text-decoration-color: var(--accent);
}

nav ul li a:focus-visible {
  background-color: var(--surface-hover);
  text-decoration-color: var(--accent);
}

nav ul li a.active {
  color: var(--text);
  background-color: var(--accent-soft);
  border-color: var(--accent);
  text-decoration-color: var(--accent);
  font-weight: 700;
}

nav ul li a.active,
nav ul li a[aria-current="page"] {
  color: var(--text);
  background-color: var(--accent-soft);
  border-color: var(--accent);
  text-decoration-color: var(--accent);
  font-weight: 700;
}

/* スマホ用ヘッダー */
@media screen and (max-width: 768px) {
  :root { --header-h: 72px; }

  header {
    justify-content: flex-end;
  }

  .menu-toggle {
    display: inline-flex;
    position: relative;
    z-index: 1001;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
  }

  .menu-toggle-bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text);
    margin: 0;
    transition: 0.3s;
    border-radius: 999px;
  }

  nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    width: 100%;
    background-color: rgba(5, 5, 5, 0.98);
    padding: 0.75rem 1rem 1rem;
    border-bottom: 1px solid var(--border);
  }

  nav.active { display: block; }

  nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.45rem;
  }

  nav ul li {
    margin: 0;
  }

  nav ul li a {
    width: 100%;
  }

  .menu-toggle.active .menu-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(4px, 5px);
  }

  .menu-toggle.active .menu-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active .menu-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -5px);
  }
}

/* ===== main領域 ===== */
html {
  scroll-padding-top: var(--header-h);
}

main,
#main-works,
#main-int {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: calc(var(--footer-h) + 20px);
  padding-left: 20px;
  padding-right: 20px;
  min-height: calc(100vh - var(--footer-h));
}

/* 万一HTMLでカスタムタグを使っている場合も有効化 */
main-works,
main-int {
  display: block;
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: calc(var(--footer-h) + 20px);
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== カードなど ===== */
.card {
  background-color: var(--surface);
  border-radius: 18px;
  border: 1px solid #262626;
  box-shadow: 0 4px 6px rgba(255, 255, 255, 0.1);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  text-align: center;
  max-width: 760px;
  width: 100%;
}

.photo-container {
  width: 200px;
  height: 200px;
  margin: 0 auto 2rem;
  overflow: hidden;
  border-radius: 50%;
  border: 3px solid #fff;
}

.profile-photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-video {
  background-color: #000000;
  transition: opacity 0.25s ease;
}

.profile-video.is-loading {
  opacity: 0;
}

/* ===== テキスト ===== */
h1 {
  color: var(--text);
  margin-bottom: 1rem;
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  line-height: 1.25;
}

h2 {
  width: min(100%, var(--content-w));
  margin: 2rem auto 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  text-align: left;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  line-height: 1.4;
}

.card h2:first-of-type {
  margin-top: 0.5rem;
  padding-top: 0;
  border-top: none;
}

.summary {
  text-align: left;
  margin: 0 auto 1.5rem;
  max-width: var(--content-w);
  line-height: 1.9;
}

.talk {
  text-align: left;
  margin: 0 auto 1rem;
  max-width: var(--content-w);
  line-height: 1.8;
}

.profile-meta {
  text-align: center;
  margin: 0 auto 0.35rem;
  max-width: var(--content-w);
}

.meta-list,
.achievement-list {
  text-align: left;
  margin: 0 auto 1.5rem;
  padding-left: 0;
  max-width: var(--content-w);
}

.meta-item,
.achievement-item {
  margin-bottom: 0.75rem;
  line-height: 1.85;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin: 1rem 0 2rem;
}

.keyword-tag {
  border: 1px solid #ffd700;
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  color: #ffe782;
  background-color: rgba(255, 215, 0, 0.09);
  font-size: 0.95rem;
}

.sub {
  font-size: 1rem;
  color: var(--note);
}

.page-note,
.section-note,
.icon-link-note {
  color: var(--note);
  font-size: 0.95rem;
}

.page-note,
.section-note {
  margin: 0 auto 1rem;
  max-width: var(--content-w);
  text-align: left;
}

/* ===== フッター ===== */
footer {
  background-color: #000;
  color: #fff;
  text-align: center;
  padding: 1rem 0;
  position: fixed;
  bottom: 0;
  width: 100%;
  border-top: 1px solid #333;
  height: var(--footer-h);
}

/* ===== SNSリンク ===== */
.social-links {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
}

.icon-link {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 44px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background-color: var(--surface-hover);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.icon-link:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background-color: rgba(255, 215, 0, 0.08);
}

.icon-link:focus-visible {
  border-color: var(--focus-ring);
  background-color: rgba(255, 215, 0, 0.12);
}

.icon-link-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.icon-link-title {
  font-weight: 700;
}

.social-icon {
  width: 26px;
  height: 26px;
  transition: transform 0.2s ease, filter 0.2s ease;
  filter: invert(1) brightness(200%);
}

.icon-link:hover .social-icon {
  transform: scale(1.08);
}

/* ===== リンクセクション ===== */
.link-icon {
  width: 50px;
  margin-right: 10px;
}

.link-info h4 {
  margin: 0;
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: rgba(255, 215, 0, 0.7);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.22em;
  line-height: 1.5;
}

.custom-link .link-info h4::after {
  content: " ↗";
  color: var(--accent);
}

.link-info p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text);
  line-height: 1.8;
}

.link-container {
  max-width: min(100%, var(--content-w));
  margin: 0 auto;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 0 10px rgb(255, 221, 0, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.link-container:hover,
.link-container:focus-within {
  transform: translateY(-2px);
  border-color: var(--accent);
  background-color: rgba(255, 215, 0, 0.05);
  box-shadow: 0 0 18px rgba(255, 215, 0, 0.14);
}

.custom-link {
  color: inherit;
  text-decoration: none;
  display: block;
  padding: 1rem 1.1rem;
  border-radius: inherit;
  text-align: left;
}

.custom-link:focus-visible {
  background-color: rgba(255, 215, 0, 0.08);
}

.link-content {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 1rem;
}

.link-info {
  width: 100%;
  text-align: left;
}

/* ===== アンカーリンク対策 ===== */
:target {
  scroll-margin-top: var(--header-h);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}