@charset "utf-8";

:root {
  --bg: #F9F9FA;
  --bg-soft: #F0F0F2;
  --panel: #FFFFFF;
  --panel-2: #FAFAFA;
  --text: #222222;
  --muted: #666666;
  --accent: #111111;
  --accent-2: #333333;
  --card: #FFFFFF;
  --border: rgba(0, 0, 0, 0.1);
  --border-hover: rgba(0, 0, 0, 0.25);
  --radius: 6px;
  --container: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Noto Sans JP', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--muted); }
img, video { max-width: 100%; display: block; }
.container { max-width: var(--container); margin-inline: auto; padding: 0 24px; }

/* HEADER */
header.site {
  position: fixed; inset: 0 0 auto 0; height: 64px;
  background: rgba(17,17,17,0.95);
  backdrop-filter: blur(12px); display: flex; align-items: center; z-index: 50; border-bottom: 1px solid rgba(255,255,255,0.1);
}
header.site.sticky { position: sticky; top: 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.02em; color: #fff; }
.brand img { width: 24px; height: 24px; display: block; border-radius: 4px; object-fit: cover; }
.brand svg { width: 24px; height: 24px; }
.brand:hover { color: #ccc; }
.nav { margin-left: auto; display: flex; gap: 24px; align-items: center; font-size: 14px; }
.nav a { color: #999; }
.nav a:hover { color: #fff; }

/* HAMBURGER */
.menu-toggle { display: none; appearance: none; -webkit-appearance: none; background: transparent; border: none; cursor: pointer; padding: 10px; z-index: 60; margin-left: auto; }
.hamburger { display: block; position: relative; width: 22px; height: 1.5px; background: #fff; transition: all 0.3s ease; }
.hamburger::before, .hamburger::after { content: ''; position: absolute; width: 22px; height: 1.5px; background: #fff; transition: all 0.3s ease; left: 0; }
.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }
.menu-toggle.is-active .hamburger { background: transparent; }
.menu-toggle.is-active .hamburger::before { top: 0; transform: rotate(45deg); }
.menu-toggle.is-active .hamburger::after { top: 0; transform: rotate(-45deg); }

/* BUTTONS */
.btn {
  display: inline-flex; gap: 8px; align-items: center; justify-content: center;
  padding: 10px 16px; border-radius: var(--radius); border: 1px solid var(--accent);
  background: var(--accent); color: #fff;
  font-size: 14px; font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent-2); background: var(--accent-2); color: #fff; }
.btn.primary { background: #fff; color: var(--accent); border-color: var(--border); }
.btn.primary:hover { background: var(--panel); color: var(--accent); border-color: var(--border-hover); }

/* PLAN buttons */
.plan-cta { display: flex; gap: 16px; justify-content: center; align-items: center; margin: 40px auto 0; }
.plan-cta .btn { min-width: 260px; padding: 14px 20px; }
@media (max-width: 640px) { .plan-cta { flex-direction: column; width: 100%; } .plan-cta .btn { width: 100%; } }

/* HERO */
.hero { position: relative; min-height: 90svh; display: grid; place-items: center; overflow: hidden; background: var(--bg); border-bottom: 1px solid var(--border); }
.hero video, .hero .hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 1; pointer-events: none; }
.hero .overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(255,255,255,0.7), var(--bg) 95%); }
.hero .inner { position: relative; padding: 160px 0 80px; z-index: 1; text-align: center; }
.hero-achievements { padding: 120px 0 40px; border-bottom: 1px solid var(--border); }

.tag { display: inline-flex; align-items: center; gap: 8px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 9999px; font-size: 12px; color: var(--muted); background: var(--bg); text-transform: uppercase; letter-spacing: 0.05em; }
h1 { margin: 24px 0 16px; font-size: clamp(32px, 6vw, 56px); line-height: 1.1; letter-spacing: -0.04em; font-weight: 700; color: var(--text); }
p.lead { font-size: clamp(16px, 2vw, 20px); color: var(--muted); max-width: 700px; margin: 0 auto; letter-spacing: -0.01em; }

/* SECTIONS */
section { padding: 96px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }
section.list { padding: 48px 0 96px; }
.section--soft { background: var(--bg-soft); }
.section--base { background: var(--bg); }
.section-title { font-size: clamp(24px, 4vw, 32px); margin: 0 0 12px; letter-spacing: -0.03em; font-weight: 600; }
.section-note { color: var(--muted); margin-top: 0; margin-bottom: 40px; font-size: 15px; }

/* GRIDS */
.grid { display: grid; gap: 24px; }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
@media (max-width: 960px) { .grid.cols-3 { grid-template-columns: 1fr; } }
.grid-cols-2 { grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-cols-about { grid-template-columns: 1.4fr 1fr; gap: 22px; }

/* CARD */
.card { border: 1px solid var(--border); background: var(--card); border-radius: var(--radius); padding: 32px; transition: border-color 0.2s ease, background 0.2s ease; display: flex; flex-direction: column; }
.card:hover { border-color: var(--border-hover); background: var(--panel); }
.card h3 { margin: 0 0 8px; font-size: 20px; letter-spacing: -0.02em; font-weight: 500; }
.card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.6; flex-grow: 1; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.chip { font-size: 12px; color: var(--muted); border: 1px solid var(--border); border-radius: 4px; padding: 4px 8px; background: transparent; letter-spacing: 0.02em; }

/* WORKS */
.work { position: relative; aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg); transition: border-color 0.3s ease; display: block; }
.work:hover { border-color: var(--border-hover); }
.work img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.work:hover img { transform: scale(1.03); }
.work .wcap { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; pointer-events: none; }
.work .wcap-top { padding: 16px; font-weight: 600; color: #fff; letter-spacing: -0.01em; font-size: 16px; text-shadow: 0 2px 10px rgba(0,0,0,0.8); }
.work .wcap-bottom { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: linear-gradient(180deg,transparent,rgba(0,0,0,.9)); color:#fff; }
.work .meta { font-size: 12px; color: #888; }
.tags { display: flex; gap: 6px; }
.tag2 { font-size: 11px; padding: 4px 8px; border: 1px solid rgba(255,255,255,0.2); border-radius: 4px; color: #ccc; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); }

/* ACHIEVEMENTS CARD SPECIFIC */
.yt-card { position: relative; border: 1px solid var(--border); background: var(--bg); border-radius: var(--radius); overflow: hidden; width: min(100%,720px); margin-inline: auto; transition: border-color 0.3s; }
.yt-card:hover { border-color: var(--border-hover); }
.thumb { aspect-ratio: 16/9; position: relative; background: #000; display: grid; place-items: center; cursor: pointer; overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.4s ease; }
.thumb:hover img { transform: scale(1.02); }
.play { position: absolute; inset: auto auto 16px 16px; padding: 8px 16px; border-radius: 9999px; background: rgba(0,0,0,0.6); color: #fff; border: 1px solid rgba(255,255,255,0.2); backdrop-filter: blur(4px); font-size: 13px; font-weight: 500; transition: background 0.2s, transform 0.2s; pointer-events: auto; }
.thumb:hover .play { background: rgba(0,0,0,0.8); transform: scale(1.05); }
.cap { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; pointer-events: none; }
.cap-top { padding: 16px; font-weight: 600; color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,.9); font-size: 18px; letter-spacing: -0.01em; }
.cap-bottom { display: flex; justify-content: space-between; align-items: center; padding: 16px; background: linear-gradient(180deg,transparent,rgba(0,0,0,.9)); color: #fff; }
.ytframe { width: 100%; height: 100%; position: absolute; inset: 0; border: 0; display: none; }

/* PROCESS */
.steps { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; padding: 24px; background: var(--bg); border-bottom: 1px solid var(--border); transition: background 0.2s; }
.step:last-child { border-bottom: none; }
.step:hover { background: var(--panel); }
.step .no { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 500; font-size: 14px; }
.step div:last-child { color: var(--text); font-size: 15px; }

/* FOOTER */
footer { padding: 64px 0; color: #888; background: var(--accent); font-size: 14px; border-top: none; }
.foot-grid { display: flex; justify-content: space-between; align-items: center; }
@media (max-width: 640px) { .foot-grid { flex-direction: column; gap: 24px; align-items: flex-start; } }
.foot-grid div:first-child { font-weight: 500; color: #fff; letter-spacing: -0.01em; }

/* --- PLAN PAGES SPECIFIC STYLES --- */
.plan-header { padding: 120px 0 64px; text-align: center; border-bottom: 1px solid var(--border); }
.plan-header h1 { margin: 0 0 16px; }
.plan-header p { margin: 0 0 32px; color: var(--muted); }

.plan-intro { margin: 64px auto; padding: 32px; background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); }
.plan-intro h2 { margin-top: 0; font-size: 20px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 24px; }
.plan-intro p, .plan-intro ul, .plan-intro li { color: var(--muted); font-size: 15px; margin-bottom: 12px; }
.plan-intro ul { padding-left: 20px; }

.plan-section { margin: 64px auto; }
.plan-item { margin-bottom: 48px; border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); transition: border-color 0.2s; }
.plan-item:hover { border-color: var(--border-hover); }
.plan-item img { border-radius: 4px; transition: transform 0.4s; border: 1px solid var(--border); }
.plan-item:hover img { transform: scale(1.02); }
.plan-item a { margin-top: 32px; }

.plan-footer { border-top: 1px solid var(--border); padding-top: 64px; }

/* --- STYLES FOR SMARTPHONES --- */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  header.site { height: 56px; }
  .menu-toggle { display: block; }
  
  /* Dropdown Nav */
  .nav { 
    position: absolute; top: 56px; left: 0; right: 0; 
    background: rgba(17,17,17,0.98); backdrop-filter: blur(12px);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 0; margin: 0; border-bottom: 1px solid rgba(255,255,255,0.1);
    transform: translateY(-10px); opacity: 0; visibility: hidden; pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; pointer-events: auto; }
  .nav a { padding: 16px 24px; display: block; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 15px; }
  .nav a:last-child { border-bottom: none; }
  .nav a:hover { background: rgba(255,255,255,0.03); }
  
  .hero { min-height: 80svh; }
  .hero .inner { padding: 120px 0 60px; }
  .hero-achievements { padding: 90px 0 32px; }
  
  section { padding: 56px 0; }
  section.list { padding: 40px 0 56px; }
  .section-note { margin-bottom: 24px; }
  
  .grid-cols-2, .grid-cols-about { grid-template-columns: 1fr; gap: 24px; }
  
  .card { padding: 24px; }
  .step { gap: 16px; padding: 20px; }
  
  .plan-header { padding: 88px 0 40px; }
  .plan-intro { margin: 40px auto; padding: 20px; }
  .plan-section { margin: 40px auto; }
  .plan-item { padding: 20px; margin-bottom: 32px; }
  .plan-footer { padding-top: 48px; }
}

/* --- SCROLL ANIMATIONS --- */
.scroll-anime {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.scroll-anime.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .scroll-anime { transition: none; opacity: 1; transform: none; }
}