/* ========== Reset ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --header-h: 6rem;
}

/* ========== Base ========== */
body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #fff;
  background: none;
  position: relative;
  z-index: 0;
  padding: 1rem;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("../img/matsui2.jpg") no-repeat center center / cover;
  filter: blur(8px) brightness(0.6);
  z-index: -1;
}

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.7);
  padding: 0.5rem 0.6rem;
  z-index: 1000;
  text-align: center;
}

.site-header .site-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header .site-nav ul li {
  flex: 0 0 auto;
}

.site-header .site-nav ul li a {
  display: block;
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  font-size: 1rem;
  padding: 0.3rem 0.45rem;
  white-space: nowrap;
}

.site-header .site-nav ul li a:hover {
  text-decoration: underline;
}

/* ========== Responsive Nav ========== */
@media (max-width: 1024px) {
  .site-header .site-nav ul {
    gap: 0.8rem;
    row-gap: 0.4rem;
  }

  .site-header .site-nav ul li a {
    font-size: 0.95rem;
    padding: 0.25rem 0.4rem;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0.4rem 0.5rem;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .site-header.is-hidden {
    transform: translateY(-100%);
    opacity: 0;
  }

  .site-header .site-nav ul {
    gap: 0.6rem;
    row-gap: 0.35rem;
  }

  .site-header .site-nav ul li a {
    font-size: 0.85rem;
    padding: 0.2rem 0.35rem;
  }
}

@media (max-width: 480px) {
  .site-header .site-nav ul {
    gap: 0.5rem;
    row-gap: 0.3rem;
  }

  .site-header .site-nav ul li a {
    font-size: 0.8rem;
    padding: 0.18rem 0.3rem;
  }
}

/* ========== Main Visual & Sections ========== */
#main-visual {
  text-align: center;
  margin: var(--header-h) 0 2rem;
}

section {
  margin-bottom: 2.5rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 1.2rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

section h2 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 1rem;
  border-bottom: 2px solid #fff;
  padding-bottom: 0.3rem;
}

/* 大見出し */
.section-heading-large {
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  margin: 2.5rem 0 1.5rem;
  color: #fff;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 0.5rem;
}

/* ========== Hero Section ========== */
.hero {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 60vh;
  text-align: center;
  color: #fff;
}

.hero-inner h1 {
  font-size: 2.5rem;
  letter-spacing: 0.1em;
}

.hero-inner p {
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

/* ========== What's New Section ========== */
.home-section {
  margin-bottom: 2.5rem;
  background: rgba(0, 0, 0, 0.5);
  padding: 1.2rem;
  border-radius: 8px;
}

.home-section h2 {
  color: #fff;
}

.home-news-list {
  list-style: disc;
  padding-left: 1.5rem;
}

.home-news-list li {
  margin-bottom: 0.5rem;
}

.home-news-list a {
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 0.2rem;
}

.home-news-list a:hover {
  border-color: #fff;
}

/* ========== Featured Track Section ========== */
.featured-track {
  margin: 1.2rem auto;
  max-width: 640px;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.featured-track iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.caption {
  text-align: center;
  margin-top: 0.8rem;
  font-size: 0.95rem;
  color: #eee;
}

/* ========== Track Card ========== */
.track {
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 0.9rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

.track h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.track .meta {
  color: #ddd;
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.track .video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
}

.track .video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

@supports not (aspect-ratio: 16 / 9) {
  .track .video {
    padding-top: 56.25%;
  }

  .track .video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
}

.track .description {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: #eee;
  line-height: 1.6;
  text-align: left;
}

.track .description p {
  margin-bottom: 0.8rem;
}

.track a img:hover {
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

/* ========== Button Style ========== */
.button-link {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  font-weight: bold;
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: background 0.3s ease;
}

.button-link:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ========== Footer ========== */
footer {
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  color: #ccc;
  margin-top: 2rem;
}

.site-footer {
  background: rgba(0, 0, 0, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
  padding: 0.5rem 0.6rem;
  backdrop-filter: blur(6px);
  color: #fff;
  position: static;
  opacity: 1;
}

.footer-nav ul {
  display: flex;
  justify-content: center;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  row-gap: 0.4rem;
}

.footer-nav a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  font-size: 0.9rem;
  padding: 0.25rem 0.4rem;
  white-space: nowrap;
}

.footer-nav a:hover {
  text-decoration: underline;
}

.footer-counter {
  margin-top: 0.4rem;
  opacity: 0.8;
  font-size: 0.8rem;
}

.footer-copy {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: #ccc;
}

/* ===== MEDIAページ専用調整 ===== */

.track {
  max-width: 640px;
  margin: 2rem auto;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 10px;
  padding: 1.2rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.track img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 1rem;
}

.track h4 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  color: #fff;
}

.track .meta {
  font-size: 0.95rem;
  color: #ccc;
  margin-bottom: 0.8rem;
}

.track .description {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: #eee;
  line-height: 1.6;
}

.profile-intro {
  text-align: center;
  margin-bottom: 2rem;
}

.profile-image {
  max-width: 220px;
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.profile-intro p {
  font-size: 1rem;
  line-height: 1.6;
  color: #eee;
  margin-bottom: 0.8rem;
}

.profile-details {
  background: rgba(0, 0, 0, 0.5);
  padding: 1.2rem;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
  max-width: 700px;
  margin: 0 auto;
  color: #fff;
}

.profile-details h3 {
  font-size: 1.2rem;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: 0.3rem;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}

.profile-details ul {
  list-style: disc;
  margin-left: 1.5rem;
}

.profile-details li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.section-heading-large {
  font-size: 2rem;
  text-align: center;
  margin: 2.5rem 0 1.5rem;
  color: #fff;
  border-bottom: 2px solid rgba(255,255,255,0.2);
  padding-bottom: 0.5rem;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("../img/matsui2.jpg") no-repeat center center / cover;
  filter: blur(8px) brightness(0.6);
  z-index: -1;
}

.with-hero-bg section,
.with-hero-bg .home-section {
  background: rgba(0, 0, 0, 0.5);
  padding: 1.5rem;
  border-radius: 8px;
  color: #fff;
}