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

:root {
  --bg:         #0c0c26;
  --bg2:        #09091e;
  --bg3:        #10103a;
  --surface:    rgba(255,255,255,0.04);
  --glass:      rgba(255,255,255,0.05);
  --border:     rgba(255,255,255,0.08);
  --border-g:   rgba(212,168,67,0.25);
  --white:      #ffffff;
  --gray:       #9aa4ba;
  --silver:     #d3dbeb;
  --accent:     #4fc3f7;
  --gold:       linear-gradient(120deg, #7d5a10 0%, #d4a843 25%, #f5e27a 50%, #d4a843 75%, #7d5a10 100%);
  --gold-flat:  #d4a843;
  --gold-glow:  rgba(212,168,67,0.4);
  --nebula1:    rgba(30,30,110,0.45);
  --nebula2:    rgba(20,20,80,0.35);
  --nebula3:    rgba(50,65,160,0.3);
  --font-en:      'Inter', sans-serif;
  --font-display: 'Cinzel', serif;
  --font-ja:      'Shippori Mincho', serif;
}

html { scroll-behavior: smooth; }

body {
  /* ページ全体の連続グラデーション — bodyのCSSで完結させる */
  background:
    linear-gradient(to bottom,
      #131340 0%,
      #0d0d34 15%,
      #090928 35%,
      #060620 55%,
      #030312 75%,
      #010108 100%
    );
  color: var(--white);
  font-family: var(--font-ja);
  line-height: 1.8;
  overflow-x: hidden;
  overflow-wrap: break-word;
}

h1, h2, h3, h4 {
  text-wrap: balance;
}

.hero-sub,
.about-text p,
.profile-list li,
.service-card p,
.achievement-content p,
.ach-list li {
  text-wrap: pretty;
}

/* page-gradient divは不要（bodyで代替） */
.page-gradient { display: none; }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===========================
   NAV
=========================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(9, 9, 30, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(212,168,67,0.15);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.nav-logo img {
  height: 38px;
  width: 38px;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(212,168,67,0.6)) drop-shadow(0 0 20px rgba(212,168,67,0.3));
}

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.2em;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 8px rgba(212,168,67,0.9)) drop-shadow(0 0 20px rgba(212,168,67,0.5)) drop-shadow(0 0 40px rgba(212,168,67,0.2));
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  margin-left: auto;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
  transition: color 0.2s, text-shadow 0.2s;
}

.nav-links a:hover {
  color: var(--gold-flat);
  text-shadow: 0 0 20px var(--gold-glow);
}

.lang-toggle {
  background: rgba(212,168,67,0.08);
  border: 1px solid var(--border-g);
  color: var(--gold-flat);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.25s;
  flex-shrink: 0;
}

.lang-toggle:hover {
  background: rgba(212,168,67,0.18);
  box-shadow: 0 0 20px var(--gold-glow);
}

.lang-toggle:active {
  transform: scale(0.9);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--gold-flat);
  transition: all 0.3s;
}

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-block;
  padding: 0.85rem 2.25rem;
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.3s, border-color 0.3s, color 0.3s, background 0.3s;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: var(--gold);
  color: #1a0e00;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background 0.3s;
}

.btn-primary:hover::after { background: rgba(255,255,255,0.15); }
.btn-primary:hover { box-shadow: 0 0 40px var(--gold-glow), 0 0 80px rgba(212,168,67,0.15); }
.btn-primary:active::after { background: rgba(0,0,0,0.1); }
.btn-primary:active { box-shadow: 0 0 15px var(--gold-glow); }

.btn-outline {
  background: transparent;
  color: var(--silver);
  border: 1px solid rgba(212,168,67,0.3);
}

.btn-outline:hover {
  border-color: var(--gold-flat);
  color: var(--gold-flat);
  box-shadow: 0 0 30px rgba(212,168,67,0.15);
}

.btn-outline:active {
  background: rgba(212,168,67,0.08);
}

.btn-buy {
  background: linear-gradient(135deg, #f0b94a, #d4a843 50%, #f5cf6e);
  color: #1a0e00;
  font-size: 0.9rem;
  padding: 1.1rem 3rem;
  box-shadow: 0 0 25px rgba(212,168,67,0.35), 0 4px 18px rgba(0,0,0,0.35);
  animation: buyPulse 2.4s ease-in-out infinite;
}

.btn-buy:hover {
  box-shadow: 0 0 45px rgba(212,168,67,0.55), 0 4px 18px rgba(0,0,0,0.4);
}

@keyframes buyPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.035); }
}

.age-notice {
  margin-top: 0.9rem;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--gray);
  opacity: 0.85;
}

.fb-page-wrap {
  margin-top: 1.5rem;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(212,168,67,0.2);
}

/* ===========================
   HERO
=========================== */
#hero {
  position: relative;
  height: 100vh;
  min-height: 650px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: url('hero.jpg') center 30% / cover no-repeat;
}

/* Orbital ring decoration */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 40%, rgba(30,30,120,0.5), transparent 60%),
    radial-gradient(ellipse at 20% 70%, rgba(15,15,80,0.4), transparent 50%);
  z-index: 1;
}

#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(12,12,40,0.15) 0%,
    rgba(12,12,40,0.20) 40%,
    rgba(11,11,36,0.55) 65%,
    rgba(13,13,52,0.85) 82%,
    rgba(13,13,64,1.00) 100%
  );
  z-index: 1;
}

/* Orbital ring SVG-like decoration via box element */
.hero-orbital {
  position: absolute;
  right: -10vw;
  top: 50%;
  width: 70vmin;
  height: 70vmin;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.12);
  z-index: 2;
  pointer-events: none;
  animation: orbitalSpin 120s linear infinite;
}

@keyframes orbitalSpin {
  from { transform: translateY(-50%) rotate(0deg); }
  to   { transform: translateY(-50%) rotate(360deg); }
}

.hero-orbital::before {
  content: '';
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.08);
}

.hero-orbital::after {
  content: '';
  position: absolute;
  inset: 25%;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.06);
}

#starCanvas {
  display: block;
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
  padding-top: 68px;
}

.hero-eyebrow {
  display: none;
}

.hero-title {
  font-family: var(--font-ja);
  font-size: clamp(2.8rem, 6.5vw, 5.5rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.06em;
  margin-bottom: 1.75rem;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 18px rgba(212,168,67,0.7)) drop-shadow(0 0 40px rgba(212,168,67,0.4));
  opacity: 0;
  transform: translateY(40px);
  animation: heroRise 1.6s ease forwards;
  animation-delay: 0.3s;
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: rgba(210,218,235,0.95);
  line-height: 2;
  max-width: 760px;
  margin-bottom: 3rem;
  text-shadow: 0 0 12px rgba(200,215,255,0.5), 0 0 28px rgba(180,200,255,0.3);
  opacity: 0;
  transform: translateY(40px);
  animation: heroRise 1.6s ease forwards;
  animation-delay: 0.9s;
}

.hero-btns {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(40px);
  animation: heroRise 1.6s ease forwards;
  animation-delay: 1.5s;
}

@keyframes heroRise {
  to { opacity: 1; transform: translateY(0); }
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.hero-scroll-indicator::before {
  content: '';
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--gold-flat), transparent);
  animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===========================
   SECTIONS COMMON
=========================== */
section { padding: 8rem 0; position: relative; z-index: 1; }
footer  { position: relative; z-index: 1; }

/* サブページ（下層ページ）の先頭セクション — 固定ナビに隠れないよう余白を追加 */
.page-top-section { padding-top: calc(8rem + 68px); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.section-label {
  display: none;
}

.section-title {
  font-family: var(--font-ja);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.04em;
  margin-bottom: 4.5rem;
  text-shadow: 0 0 16px rgba(200,215,255,0.55), 0 0 36px rgba(200,215,255,0.3), 0 0 70px rgba(200,215,255,0.12);
}

/* Section divider line */
section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(212,168,67,0.25), transparent);
}

/* ===========================
   ABOUT
=========================== */
#about {
  background:
    radial-gradient(ellipse at 85% 25%, rgba(40,40,130,0.3), transparent 55%),
    radial-gradient(ellipse at 10% 80%, rgba(20,20,90,0.2), transparent 50%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p {
  color: rgba(210,218,235,0.95);
  margin-bottom: 1.75rem;
  font-size: 1.08rem;
  line-height: 2;
  text-shadow: 0 0 10px rgba(200,215,255,0.4), 0 0 24px rgba(180,200,255,0.22);
}

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(212,168,67,0.2);
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 0 10px rgba(212,168,67,0.7)) drop-shadow(0 0 26px rgba(212,168,67,0.4));
}

.stat-label {
  font-size: 0.88rem;
  color: var(--silver);
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px rgba(200,215,255,0.4), 0 0 22px rgba(180,200,255,0.2);
}

.profile-card {
  background:
    linear-gradient(to bottom, rgba(5,8,32,0.32) 0%, rgba(5,8,32,0.55) 35%, rgba(5,8,32,0.93) 65%, rgba(5,8,32,0.96) 100%),
    url('profile.jpg') center top / cover no-repeat;
  backdrop-filter: blur(2px) saturate(140%);
  -webkit-backdrop-filter: blur(2px) saturate(140%);
  border: 1px solid rgba(212,168,67,0.45);
  border-radius: 4px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 20px rgba(212,168,67,0.25),
    0 0 50px rgba(212,168,67,0.1),
    inset 0 0 30px rgba(212,168,67,0.04),
    inset 0 1px 0 rgba(255,255,255,0.1);
}

/* Subtle orbital ring on profile card */
.profile-card::after {
  content: '';
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.08);
  pointer-events: none;
}

.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: #1a0e00;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px rgba(212,168,67,0.6), 0 0 45px rgba(212,168,67,0.3);
  text-shadow: 0 0 8px rgba(255,255,255,0.6);
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  letter-spacing: 0.05em;
  text-shadow: 0 0 14px rgba(200,215,255,0.6), 0 0 32px rgba(200,215,255,0.3);
}

.profile-name-romaji {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: rgba(245,226,122,0.95);
  text-shadow: 0 0 10px rgba(212,168,67,0.9), 0 0 24px rgba(245,200,80,0.6), 0 0 48px rgba(212,168,67,0.3);
}

.profile-title {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2rem;
  filter: drop-shadow(0 0 10px rgba(212,168,67,0.7)) drop-shadow(0 0 22px rgba(212,168,67,0.35));
}

.profile-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.profile-list li {
  font-size: 0.98rem;
  color: rgba(210,218,235,0.95);
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.8;
  text-shadow: 0 0 10px rgba(200,215,255,0.4), 0 0 22px rgba(180,200,255,0.2);
}

.profile-list li::before {
  content: '✦';
  position: absolute;
  left: 0;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 0.6rem;
  top: 0.3rem;
}

/* ===========================
   SERVICES
=========================== */
#services {
  background:
    radial-gradient(ellipse at 15% 20%, rgba(35,35,120,0.3), transparent 50%),
    radial-gradient(ellipse at 85% 80%, rgba(25,25,100,0.25), transparent 50%);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: rgba(10,10,38,0.82);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid rgba(212,168,67,0.3);
  border-radius: 4px;
  padding: 2.25rem;
  transition: border-color 0.4s, transform 0.4s, box-shadow 0.4s;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 15px rgba(212,168,67,0.12),
    0 0 30px rgba(212,168,67,0.05),
    inset 0 0 20px rgba(212,168,67,0.03);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(212,168,67,0.5), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

/* Subtle orbital ring on service card */
.service-card::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.06);
  pointer-events: none;
  transition: border-color 0.4s;
}

.service-card:hover {
  border-color: rgba(212,168,67,0.7);
  transform: translateY(-6px);
  box-shadow:
    0 0 25px rgba(212,168,67,0.35),
    0 0 55px rgba(212,168,67,0.15),
    0 0 90px rgba(212,168,67,0.06),
    inset 0 0 30px rgba(212,168,67,0.05),
    inset 0 1px 0 rgba(255,255,255,0.12);
}

.service-card:hover::before { opacity: 1; }
.service-card:hover::after { border-color: rgba(212,168,67,0.12); }

/* ===========================
   SERVICE CARD — 背景写真
=========================== */
/* 各カードに写真+暗めのオーバーレイを重ねる */
.services-grid .service-card:nth-child(1) {
  background:
    linear-gradient(rgba(5,8,32,0.76), rgba(5,8,32,0.76)),
    url('service-flight.png') center / cover no-repeat;
}
.services-grid .service-card:nth-child(2) {
  background:
    linear-gradient(rgba(5,8,32,0.72), rgba(5,8,32,0.72)),
    url('service-zerog.jpg?v=2') center 62% / cover no-repeat;
}
.services-grid .service-card:nth-child(3) {
  background:
    radial-gradient(circle at 78% 18%, rgba(212,168,67,0.22), transparent 42%),
    radial-gradient(circle at 15% 85%, rgba(140,90,255,0.16), transparent 48%),
    radial-gradient(circle 1.5px at 20% 30%, rgba(255,255,255,0.5), transparent 100%),
    radial-gradient(circle 1px at 70% 15%, rgba(255,255,255,0.4), transparent 100%),
    radial-gradient(circle 1.5px at 85% 60%, rgba(255,255,255,0.5), transparent 100%),
    radial-gradient(circle 1px at 40% 75%, rgba(255,255,255,0.4), transparent 100%),
    radial-gradient(circle 1px at 55% 45%, rgba(255,255,255,0.35), transparent 100%),
    radial-gradient(circle 1.5px at 90% 85%, rgba(255,255,255,0.4), transparent 100%),
    repeating-linear-gradient(135deg, rgba(212,168,67,0.05) 0px, rgba(212,168,67,0.05) 1px, transparent 1px, transparent 16px),
    rgba(10,10,38,0.88);
}

.services-grid .service-card:nth-child(3)::after {
  width: 220px;
  height: 220px;
  right: -70px;
  bottom: -70px;
  border-color: rgba(212,168,67,0.1);
}

.services-grid .service-card:nth-child(4) {
  background:
    linear-gradient(rgba(5,8,32,0.74), rgba(5,8,32,0.74)),
    url('service-lecture.jpg') center / cover no-repeat;
}
.services-grid .service-card:nth-child(5) {
  background:
    linear-gradient(rgba(5,8,32,0.76), rgba(5,8,32,0.76)),
    url('service-conference.png') center / cover no-repeat;
}
.services-grid .service-card:nth-child(6) {
  background:
    linear-gradient(rgba(5,8,32,0.72), rgba(5,8,32,0.72)),
    url('service-conference.jpg?v=2') center / cover no-repeat;
}
.services-grid .service-card:nth-child(7) {
  background:
    linear-gradient(rgba(5,8,32,0.58), rgba(5,8,32,0.58)),
    url('service-beer.png') center / contain no-repeat;
}
.services-grid .service-card:nth-child(8) {
  background:
    linear-gradient(rgba(5,8,32,0.55), rgba(5,8,32,0.55)),
    url('service-visit.png') center / contain no-repeat;
}

.service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 1.25rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(212,168,67,0.22), rgba(10,10,38,0.85));
  border: 1px solid rgba(212,168,67,0.45);
  box-shadow: 0 0 18px rgba(212,168,67,0.25), inset 0 0 12px rgba(212,168,67,0.1);
  filter: drop-shadow(0 0 6px rgba(212,168,67,0.4));
}

.service-card h3 {
  font-family: var(--font-ja);
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  letter-spacing: 0.03em;
  text-shadow: 0 0 15px rgba(200,215,255,0.45), 0 0 30px rgba(200,215,255,0.15);
}

.service-card p {
  font-size: 0.97rem;
  color: rgba(210,218,235,0.97);
  line-height: 1.95;
  text-shadow: 0 0 10px rgba(180,200,255,0.12);
}

/* ===========================
   ACHIEVEMENTS
=========================== */
#achievements {
  background:
    radial-gradient(ellipse at 75% 15%, rgba(35,35,120,0.3), transparent 50%),
    radial-gradient(ellipse at 15% 85%, rgba(20,20,85,0.25), transparent 55%);
}

.ach-tabs {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.ach-tab {
  background: rgba(20,20,55,0.6);
  border: 1px solid rgba(255,255,255,0.07);
  color: var(--gray);
  font-family: var(--font-display);
  font-size: 0.91rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.45rem 1.25rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.25s;
}

.ach-tab:hover {
  border-color: rgba(212,168,67,0.5);
  color: var(--gold-flat);
  box-shadow: 0 0 20px rgba(212,168,67,0.1);
}

.ach-tab:active {
  transform: scale(0.93);
}

.ach-tab.active {
  background: var(--gold);
  border-color: transparent;
  color: #1a0e00;
  font-weight: 700;
  box-shadow: 0 0 25px var(--gold-glow);
}

.achievements-list {
  display: flex;
  flex-direction: column;
  position: relative;
}

.achievements-list::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(2rem + 45px);
  width: 1px;
  background: linear-gradient(to bottom, rgba(212,168,67,0.55), rgba(212,168,67,0.1));
  z-index: 0;
}

.achievement-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 2.5rem;
  padding: 1.75rem 2rem;
  margin-bottom: 1rem;
  background: rgba(10,10,38,0.75);
  border: 1px solid rgba(212,168,67,0.25);
  border-radius: 4px;
  align-items: start;
  position: relative;
  z-index: 1;
  transition: all 0.3s;
  box-shadow:
    0 0 15px rgba(212,168,67,0.1),
    inset 0 0 20px rgba(212,168,67,0.03);
}

/* カテゴリ別カラー */
.achievement-item[data-cat="flight"] {
  border-color: rgba(50,150,255,0.4);
  box-shadow: 0 0 18px rgba(50,130,255,0.2), inset 0 0 20px rgba(50,130,255,0.04);
}
.achievement-item[data-cat="iac"] {
  border-color: rgba(160,80,255,0.4);
  box-shadow: 0 0 18px rgba(140,60,255,0.2), inset 0 0 20px rgba(140,60,255,0.04);
}

/* 写真付きカード共通 — 本文が写真の幅に重ならないよう右に余白を確保 */
.achievement-item.ach-flight-2014 .achievement-content,
.achievement-item.ach-flight-zerog .achievement-content,
.achievement-item.ach-flight-contract .achievement-content,
.achievement-item.ach-iac-2025 .achievement-content,
.achievement-item.ach-iac-2023 .achievement-content,
.achievement-item.ach-iac-2022 .achievement-content,
.achievement-item.ach-iac-2021 .achievement-content,
.achievement-item.ach-iac-2020 .achievement-content,
.achievement-item.ach-beer-channel .achievement-content,
.achievement-item.ach-beer-2021 .achievement-content,
.achievement-item.ach-beer-2022 .achievement-content,
.achievement-item.ach-beer-2023 .achievement-content,
.achievement-item.ach-beer-2024 .achievement-content {
  padding-right: 174px;
}

@media (max-width: 600px) {
  /* スマホは本文スペースが狭いため、余白確保はやめて右上固定に戻す */
  .achievement-item.ach-flight-2014,
  .achievement-item.ach-flight-zerog,
  .achievement-item.ach-flight-contract,
  .achievement-item.ach-iac-2025,
  .achievement-item.ach-iac-2023,
  .achievement-item.ach-iac-2022,
  .achievement-item.ach-iac-2021,
  .achievement-item.ach-iac-2020,
  .achievement-item.ach-beer-channel,
  .achievement-item.ach-beer-2021,
  .achievement-item.ach-beer-2022,
  .achievement-item.ach-beer-2023,
  .achievement-item.ach-beer-2024 {
    background-position: right 14px top 14px, right 14px top 14px !important;
    background-size: auto, 86px 86px !important;
  }
  .achievement-item.ach-flight-2014 .achievement-content,
  .achievement-item.ach-flight-zerog .achievement-content,
  .achievement-item.ach-flight-contract .achievement-content,
  .achievement-item.ach-iac-2025 .achievement-content,
  .achievement-item.ach-iac-2023 .achievement-content,
  .achievement-item.ach-iac-2022 .achievement-content,
  .achievement-item.ach-iac-2021 .achievement-content,
  .achievement-item.ach-iac-2020 .achievement-content,
  .achievement-item.ach-beer-channel .achievement-content,
  .achievement-item.ach-beer-2021 .achievement-content,
  .achievement-item.ach-beer-2022 .achievement-content,
  .achievement-item.ach-beer-2023 .achievement-content,
  .achievement-item.ach-beer-2024 .achievement-content {
    padding-right: 0;
  }
}

/* フライト実績 — 個別写真（IACと同じ正方形・同じサイズで右上に配置） */
.achievement-item.ach-flight-2014,
.achievement-item.ach-flight-zerog,
.achievement-item.ach-flight-contract {
  background-repeat: no-repeat;
  background-position: right 24px center, right 24px center;
  background-size: auto, 150px 150px;
}
.achievement-item.ach-flight-2014 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('flight-2014.jpg?v=3');
}
.achievement-item.ach-flight-zerog {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('zerog.jpg?v=3');
}
.achievement-item.ach-flight-contract {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('flight-contract.jpg?v=3');
}

/* IAC論文 — 年ごとの個別写真（全て正方形に統一し、同じサイズで右上に配置） */
.achievement-item.ach-iac-2025,
.achievement-item.ach-iac-2023,
.achievement-item.ach-iac-2022,
.achievement-item.ach-iac-2021,
.achievement-item.ach-iac-2020 {
  background-repeat: no-repeat;
  background-position: right 24px center, right 24px center;
  background-size: auto, 150px 150px;
}
.achievement-item.ach-iac-2025 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('iac-2025.jpg?v=4');
}
.achievement-item.ach-iac-2023 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('iac-2023.jpg?v=4');
}
.achievement-item.ach-iac-2022 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('iac-2022.jpg?v=3');
}
.achievement-item.ach-iac-2021 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('iac-photo.jpg?v=3');
}
.achievement-item.ach-iac-2020 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('iac-2020.png?v=3');
}
.achievement-item[data-cat="beer"] {
  border-color: rgba(212,168,67,0.45);
  box-shadow: 0 0 18px rgba(212,168,67,0.2), inset 0 0 20px rgba(212,168,67,0.04);
}
.achievement-item.ach-beer-channel,
.achievement-item.ach-beer-2021,
.achievement-item.ach-beer-2022,
.achievement-item.ach-beer-2023,
.achievement-item.ach-beer-2024 {
  background-repeat: no-repeat;
  background-position: right 24px center, right 24px center;
  background-size: auto, 150px 150px;
}
.achievement-item.ach-beer-channel {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('beer-channel.png?v=2');
}
.achievement-item.ach-beer-2021 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('beer-2021.jpg?v=1');
}
.achievement-item.ach-beer-2022 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('beer-2022.jpg?v=1');
}
.achievement-item.ach-beer-2023 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('beer-2023.png?v=1');
}
.achievement-item.ach-beer-2024 {
  background-image:
    linear-gradient(to right, rgba(5,10,30,0.97) 40%, rgba(5,10,30,0.5) 78%, rgba(5,10,30,0.25) 100%),
    url('beer-2024.png?v=1');
}

.achievement-item[data-cat="edu"] {
  border-color: rgba(50,210,120,0.4);
  box-shadow: 0 0 18px rgba(50,200,110,0.2), inset 0 0 20px rgba(50,200,110,0.04);
}

/* 講演・教育（企業訪問）— 写真2枚を縦に並べて右側に配置（floatで見出しの折り返しを自然にする） */
.ach-photo-stack {
  float: right;
  margin-left: 1rem;
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ach-photo-stack img {
  width: 150px;
  height: 90px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid rgba(212,168,67,0.25);
  display: block;
}

@media (max-width: 600px) {
  .ach-photo-stack {
    gap: 4px;
  }
  .ach-photo-stack img {
    width: 86px;
    height: 50px;
  }
}

.achievement-item:hover {
  transform: translateX(4px);
  filter: brightness(1.1);
}

.achievement-item.hidden { display: none; }

.achievement-year {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
  line-height: 1.6;
  padding-top: 0.15rem;
  text-align: center;
  filter: drop-shadow(0 0 6px rgba(212,168,67,0.4));
}

.achievement-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 77px;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold-flat);
  box-shadow: 0 0 10px var(--gold-glow), 0 0 0 4px rgba(10,10,38,0.95);
  z-index: 2;
}

.ach-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border: 1px solid rgba(212,168,67,0.3);
  border-radius: 2px;
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.65rem;
}

.achievement-content h3 {
  font-family: var(--font-ja);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
  line-height: 1.5;
  text-shadow: 0 0 15px rgba(200,215,255,0.4), 0 0 30px rgba(200,215,255,0.12);
}

.achievement-content p {
  font-size: 0.97rem;
  color: rgba(210,218,235,0.97);
  line-height: 1.95;
  text-shadow: 0 0 10px rgba(180,200,255,0.12);
}

.ach-list {
  list-style: none;
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.ach-list li {
  font-size: 0.97rem;
  color: rgba(210,218,235,0.97);
  padding-left: 1.4rem;
  position: relative;
  line-height: 1.8;
  text-shadow: 0 0 10px rgba(180,200,255,0.12);
}

.ach-list li::before {
  content: '✦';
  position: absolute;
  left: 0;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 0.5rem;
  top: 0.35rem;
}

/* ===========================
   CONTACT
=========================== */
#contact {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(35,35,115,0.2), transparent 60%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}

.contact-info p {
  color: var(--silver);
  margin-bottom: 2.5rem;
  font-size: 1rem;
  line-height: 2;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--silver);
}

.contact-detail a {
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: filter 0.2s;
}

.contact-detail a:hover { filter: brightness(1.3); }

.contact-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(212,168,67,0.22), rgba(10,10,38,0.85));
  border: 1px solid rgba(212,168,67,0.45);
  box-shadow: 0 0 12px rgba(212,168,67,0.2), inset 0 0 8px rgba(212,168,67,0.1);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-flat);
}

.form-group input,
.form-group textarea {
  background: rgba(20,20,55,0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 2px;
  padding: 0.9rem 1.25rem;
  color: var(--white);
  font-family: var(--font-ja);
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(212,168,67,0.6);
  box-shadow: 0 0 20px rgba(212,168,67,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.18);
}

/* ===========================
   FOOTER
=========================== */
footer {
  background: transparent;
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(212,168,67,0.15);
  padding: 4rem 0;
  position: relative;
}

/* Orbital ring in footer */
footer::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(212,168,67,0.05);
  pointer-events: none;
}

.footer-inner { text-align: center; position: relative; z-index: 1; }

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.25em;
  background: var(--gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 0 15px rgba(212,168,67,0.4));
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--gray);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.footer-copy {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.2);
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer-social a {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(212,168,67,0.22), rgba(10,10,38,0.85));
  border: 1px solid rgba(212,168,67,0.45);
  box-shadow: 0 0 12px rgba(212,168,67,0.2), inset 0 0 8px rgba(212,168,67,0.1);
  transition: box-shadow 0.3s, transform 0.3s;
}

.footer-social a:hover {
  box-shadow: 0 0 20px rgba(212,168,67,0.4), inset 0 0 8px rgba(212,168,67,0.15);
  transform: translateY(-2px);
}

/* ===========================
   ACHIEVEMENT TABS hidden
=========================== */
.achievement-item.hidden { display: none; }

/* ===========================
   FADE-IN ANIMATION
=========================== */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===========================
   MOBILE
=========================== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    background: rgba(9,9,28,0.97);
    backdrop-filter: blur(20px);
    padding: 1.75rem 2.5rem;
    gap: 1.5rem;
    border-bottom: 1px solid rgba(212,168,67,0.15);
  }

  .about-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }

  .about-stats { gap: 1.5rem; }

  .hero-title { font-size: 2.4rem; }

  .hero-orbital { display: none; }

  section { padding: 5.5rem 0; }

  .page-top-section { padding-top: calc(5.5rem + 68px); }

  .achievement-item { grid-template-columns: 70px 1fr; gap: 1.25rem; }

  .achievements-list::before { left: calc(2rem + 35px); }
  .achievement-item::before { left: 67px; }

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