/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background: #1A3020;
  color: #E8E8E0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== VARIABLES ===== */
:root {
  --green: #1A3020;
  --green-light: #213828;
  --green-mid: #2A4530;
  --green-dark: #12221A;
  --gold: #C4A44A;
  --gold-light: #DFC06A;
  --gold-pale: rgba(196,164,74,0.15);
  --white: #F0EEE8;
  --gray: #8A9E8C;
  --red-yt: #FF0000;
  --line-green: #06C755;
  --border: rgba(196,164,74,0.25);
  --card-bg: rgba(255,255,255,0.04);
  --radius: 12px;
}

/* ===== CONTAINER ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== ANIMATIONS ===== */
@keyframes sway { 0%,100%{transform:rotate(-2deg);} 50%{transform:rotate(2deg);} }
@keyframes fadeInUp { from{opacity:0;transform:translateY(30px);} to{opacity:1;transform:translateY(0);} }

.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(26,48,32,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { font-size: 1.3rem; font-weight: 900; color: var(--white); }
.nav-logo span { color: var(--gold); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { font-size: 0.85rem; color: var(--gray); transition: color 0.2s; }
.nav-links a:hover { color: var(--gold); }
.btn-nav {
  background: var(--gold); color: var(--green-dark) !important;
  padding: 7px 16px; border-radius: 6px; font-weight: 700; font-size: 0.82rem;
  transition: background 0.2s !important;
}
.btn-nav:hover { background: var(--gold-light) !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); transition: 0.3s; border-radius: 2px; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 100px 0 60px; position: relative; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 70% at 50% 40%, rgba(196,164,74,0.08) 0%, transparent 70%),
              linear-gradient(180deg, rgba(26,48,32,0) 0%, rgba(18,34,26,0.6) 100%);
}
.hero-overlay {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    90deg, transparent, transparent 60px,
    rgba(196,164,74,0.03) 60px, rgba(196,164,74,0.03) 61px
  );
}
.hero-content { position: relative; z-index: 1; text-align: center; }
.hero-icon { font-size: 4rem; margin-bottom: 16px; display: inline-block; animation: sway 4s ease-in-out infinite; }
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900;
  line-height: 1.3; margin-bottom: 16px;
}
.gold { color: var(--gold); }
.hero-sub { font-size: 1.05rem; color: var(--gray); margin-bottom: 36px; }

.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-youtube {
  display: flex; align-items: center; gap: 10px;
  background: var(--red-yt); color: #fff;
  padding: 14px 28px; border-radius: 8px; font-weight: 700; font-size: 1rem;
  transition: background 0.2s, transform 0.2s;
}
.btn-youtube:hover { background: #cc0000; transform: translateY(-2px); }
.btn-secondary {
  display: flex; align-items: center; gap: 8px;
  background: transparent; color: var(--gold); border: 1px solid var(--gold);
  padding: 14px 24px; border-radius: 8px; font-weight: 700;
  transition: background 0.2s, transform 0.2s;
}
.btn-secondary:hover { background: var(--gold-pale); transform: translateY(-2px); }

/* ===== SECTION BASE ===== */
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 900;
  text-align: center; margin-bottom: 12px;
  background: linear-gradient(135deg, var(--white), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.section-sub { text-align: center; color: var(--gray); margin-bottom: 48px; }

/* ===== PROFILE ===== */
.profile { background: var(--green-light); }
.profile-grid { display: grid; grid-template-columns: 280px 1fr; gap: 48px; align-items: start; }
.profile-avatar { text-align: center; }
.avatar-circle {
  width: 180px; height: 180px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green-mid), var(--green-dark));
  border: 3px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; margin: 0 auto 20px;
}
.profile-sns { display: flex; justify-content: center; gap: 12px; }
.sns-btn {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s, opacity 0.2s;
}
.sns-btn:hover { transform: scale(1.15); opacity: 0.85; }
.sns-btn.youtube { background: var(--red-yt); color: #fff; }
.sns-btn.instagram { background: linear-gradient(45deg,#f09433,#e6683c,#dc2743,#cc2366,#bc1888); color: #fff; }
.sns-btn.twitter { background: #000; color: #fff; }

.profile-name { font-size: 2rem; font-weight: 900; margin-bottom: 4px; }
.profile-tagline { color: var(--gold); font-size: 0.95rem; margin-bottom: 16px; }
.profile-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.profile-tag {
  background: var(--gold-pale); border: 1px solid var(--border);
  color: var(--gold); font-size: 0.78rem; padding: 4px 12px; border-radius: 50px;
}
.profile-bio { font-size: 0.95rem; color: var(--gray); margin-bottom: 24px; line-height: 1.8; }
.profile-stats { display: flex; gap: 24px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 1.2rem; font-weight: 700; color: var(--gold); }
.stat-label { font-size: 0.75rem; color: var(--gray); }

/* ===== VIDEOS ===== */
.videos { background: var(--green); }
.video-filters { display: flex; gap: 10px; justify-content: center; margin-bottom: 36px; flex-wrap: wrap; }
.filter-btn {
  background: transparent; border: 1px solid rgba(255,255,255,0.15);
  color: var(--gray); padding: 8px 20px; border-radius: 50px; font-size: 0.88rem;
  cursor: pointer; transition: all 0.2s; font-family: inherit;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--gold); border-color: var(--gold);
  color: var(--green-dark); font-weight: 700;
}
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  background: var(--card-bg); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.video-card:hover { border-color: var(--border); transform: translateY(-4px); }
.video-card.hidden { display: none; }
.video-thumb { position: relative; padding-top: 56.25%; }
.video-thumb iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
.video-info { padding: 16px; }
.video-cat-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  padding: 3px 10px; border-radius: 50px; margin-bottom: 8px;
}
.video-cat-tag.performance { background: rgba(196,164,74,0.2); color: var(--gold); }
.video-cat-tag.lesson { background: rgba(74,196,164,0.2); color: #4ac4a4; }
.video-cat-tag.collab { background: rgba(164,74,196,0.2); color: #a44ac4; }
.video-cat-tag.other { background: rgba(196,196,74,0.2); color: #c4c44a; }
.video-info h3 { font-size: 0.92rem; font-weight: 700; margin-bottom: 6px; }
.video-info p { font-size: 0.8rem; color: var(--gray); }
.video-more { text-align: center; margin-top: 36px; }
.btn-youtube-more {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--red-yt); color: #fff;
  padding: 12px 28px; border-radius: 8px; font-weight: 700;
  transition: background 0.2s, transform 0.2s;
}
.btn-youtube-more:hover { background: #cc0000; transform: translateY(-2px); }

/* ===== TIMELINE ===== */
.timeline-section { background: var(--green-light); }
.timeline { max-width: 720px; margin: 0 auto; position: relative; }
.timeline::before {
  content: ''; position: absolute; left: 100px; top: 0; bottom: 0;
  width: 2px; background: var(--border);
}
.timeline-item {
  display: grid; grid-template-columns: 100px 1fr; gap: 32px;
  margin-bottom: 36px; align-items: start; position: relative;
}
.timeline-item::before {
  content: ''; position: absolute; left: 93px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--gold); border: 3px solid var(--green-light);
  z-index: 1;
}
.timeline-date { font-size: 0.8rem; color: var(--gray); padding-top: 4px; text-align: right; }
.timeline-content {
  background: var(--card-bg); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius); padding: 20px;
}
.timeline-content h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.timeline-content p { font-size: 0.85rem; color: var(--gray); margin-bottom: 12px; }
.timeline-tag {
  display: inline-block; background: var(--gold-pale); border: 1px solid var(--border);
  color: var(--gold); font-size: 0.72rem; padding: 2px 10px; border-radius: 50px;
}

/* ===== FAN COMMENTS ===== */
.fan-comments { background: var(--green); }
.comments-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.comment-card {
  background: var(--card-bg); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius); padding: 24px;
  transition: border-color 0.3s;
}
.comment-card:hover { border-color: var(--border); }
.comment-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.comment-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--green-mid); display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
}
.comment-name { font-size: 0.9rem; font-weight: 700; }
.comment-platform { font-size: 0.75rem; color: var(--gray); }
.comment-text { font-size: 0.85rem; color: var(--gray); line-height: 1.7; margin-bottom: 12px; }
.comment-stars { color: var(--gold); font-size: 0.85rem; letter-spacing: 2px; }

/* ===== NEWSLETTER ===== */
.newsletter { background: var(--green-light); }
.newsletter-form { max-width: 560px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.newsletter-form input {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px; padding: 12px 16px; color: var(--white); font-size: 0.95rem;
  font-family: inherit; transition: border-color 0.2s;
}
.newsletter-form input:focus { outline: none; border-color: var(--gold); }
.newsletter-checks { display: flex; flex-direction: column; gap: 10px; }
.check-label {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.88rem; color: var(--gray); cursor: pointer;
}
.check-label input[type="checkbox"] { accent-color: var(--gold); width: 16px; height: 16px; }
.btn-submit {
  background: var(--gold); color: var(--green-dark);
  border: none; padding: 14px; border-radius: 8px; font-size: 1rem; font-weight: 800;
  cursor: pointer; transition: background 0.2s, transform 0.2s; font-family: inherit;
}
.btn-submit:hover { background: var(--gold-light); transform: translateY(-2px); }
.form-note { font-size: 0.8rem; color: var(--gray); text-align: center; }
.thanks-message {
  display: none; text-align: center; padding: 52px 40px; max-width: 560px; margin: 0 auto;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px;
}
.thanks-icon { font-size: 3rem; margin-bottom: 16px; }
.thanks-message h3 { font-size: 1.3rem; font-weight: 900; margin-bottom: 12px; color: var(--gold); }
.thanks-message p { font-size: 0.9rem; color: var(--gray); margin-bottom: 24px; }
.btn-youtube-sm {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--red-yt); color: #fff;
  padding: 10px 22px; border-radius: 8px; font-weight: 700; font-size: 0.9rem;
  transition: background 0.2s;
}
.btn-youtube-sm:hover { background: #cc0000; }

/* ===== CONTACT ===== */
.contact { background: var(--green); }
.contact-info-bar {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 40px;
}
.info-item {
  background: var(--gold-pale); border: 1px solid var(--border);
  color: var(--gold); padding: 8px 16px; border-radius: 50px; font-size: 0.85rem;
}
.contact-form { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.88rem; font-weight: 600; }
.required { color: #FC8181; }
.form-group input, .form-group select, .form-group textarea {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px; padding: 12px 16px; color: var(--white); font-size: 0.95rem;
  font-family: inherit; transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--gold);
}
.form-group select option { background: var(--green-mid); }
.form-group textarea { resize: vertical; }

/* ===== FOOTER ===== */
.footer { background: var(--green-dark); border-top: 1px solid var(--border); padding: 40px 0 24px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 32px; flex-wrap: wrap; gap: 24px; }
.footer-brand p { font-size: 0.85rem; color: var(--gray); margin-top: 8px; margin-bottom: 16px; }
.footer-sns { display: flex; gap: 10px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.footer-links a { font-size: 0.82rem; color: var(--gray); transition: color 0.2s; }
.footer-links a:hover { color: var(--gold); }
.footer-copy { text-align: center; font-size: 0.78rem; color: var(--gray); border-top: 1px solid rgba(255,255,255,0.05); padding-top: 20px; }

/* ===== FLOATING CTA ===== */
.floating-cta {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  display: flex; flex-direction: column; gap: 10px; align-items: flex-end;
  opacity: 0; pointer-events: none; transition: opacity 0.4s, transform 0.4s;
  transform: translateY(20px);
}
.floating-cta.show { opacity: 1; pointer-events: all; transform: translateY(0); }
.floating-youtube {
  display: flex; align-items: center; gap: 8px;
  background: var(--red-yt); color: #fff;
  padding: 12px 20px; border-radius: 50px; font-weight: 700; font-size: 0.9rem;
  box-shadow: 0 6px 20px rgba(255,0,0,0.3);
  transition: transform 0.2s, background 0.2s;
}
.floating-youtube:hover { background: #cc0000; transform: scale(1.05); }
.floating-notify {
  display: block; text-align: center;
  background: var(--gold); color: var(--green-dark);
  padding: 10px 20px; border-radius: 50px; font-weight: 700; font-size: 0.85rem;
  box-shadow: 0 6px 20px rgba(196,164,74,0.3);
  transition: transform 0.2s, background 0.2s;
}
.floating-notify:hover { background: var(--gold-light); transform: scale(1.05); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: fixed; top: 64px; left: 0; right: 0; background: var(--green-mid); padding: 24px; gap: 16px; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .profile-grid { grid-template-columns: 1fr; }
  .avatar-circle { width: 140px; height: 140px; font-size: 4rem; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .comments-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 80px; }
  .timeline-item { grid-template-columns: 80px 1fr; gap: 20px; }
  .timeline-item::before { left: 73px; }
  .form-row { grid-template-columns: 1fr; }
  .floating-cta { bottom: 16px; right: 16px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn-youtube, .btn-secondary { width: 100%; justify-content: center; }
  .timeline { padding-left: 0; }
  .contact-info-bar { flex-direction: column; align-items: center; }
}