:root{--color-bg: #0f0f13;--color-surface: #1a1a24;--color-surface-hover: #252535;--color-text: #e8e8f0;--color-text-muted: #8888a0;--color-accent: #22d3ee;--color-accent-hover: #06b6d4;--color-danger: #fc5c7c;--color-border: #2a2a3a;--font-sans: "Hiragino Sans", "Noto Sans JP", system-ui, -apple-system, sans-serif;--max-width: 960px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.7;min-height:100vh}a{color:var(--color-accent);text-decoration:none;transition:color .2s}a:hover{color:var(--color-accent-hover)}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:.5rem;font-size:1rem;font-weight:600;cursor:pointer;border:none;transition:background-color .2s,transform .1s}.btn:active{transform:scale(.98)}.btn-primary{background-color:var(--color-accent);color:#0f0f13}.btn-primary:hover{background-color:var(--color-accent-hover)}.btn-outline{background-color:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-outline:hover{background-color:var(--color-surface-hover)}.header[data-astro-cid-3ef6ksr2]{position:relative;width:100%;height:50vh;overflow:hidden}.header-bg[data-astro-cid-3ef6ksr2]{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain;object-position:right center;z-index:1}.header-gradient[data-astro-cid-3ef6ksr2]{position:absolute;top:0;left:0;width:100%;height:100%;z-index:2;pointer-events:none}.header-overlay[data-astro-cid-3ef6ksr2]{position:relative;z-index:3;display:flex;flex-direction:column;justify-content:flex-start;width:100%;height:50vh}.header-inner[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;justify-content:flex-end;height:4rem;gap:2rem;padding:0 1.5rem}.logo[data-astro-cid-3ef6ksr2]{font-size:1.5rem;font-weight:700;color:#fff;text-decoration:none;text-shadow:0 1px 4px rgba(0,0,0,.6);white-space:nowrap}.logo[data-astro-cid-3ef6ksr2]:hover{color:var(--color-accent-hover)}.user-greeting[data-astro-cid-3ef6ksr2]{color:#ffffffd9;font-size:.9rem;text-shadow:0 1px 4px rgba(0,0,0,.6);white-space:nowrap}.nav[data-astro-cid-3ef6ksr2]{white-space:nowrap}.lang-toggle[data-astro-cid-3ef6ksr2]{position:absolute;bottom:1rem;right:1.5rem;z-index:4}.lang-btn[data-astro-cid-3ef6ksr2]{background:#ffffff1a;border:1px solid rgba(255,255,255,.25);color:#fffc;padding:.25rem .75rem;border-radius:.5rem;font-size:.75rem;cursor:pointer;transition:all .2s;backdrop-filter:blur(4px)}.lang-btn[data-astro-cid-3ef6ksr2]:hover{background:#fff3;color:#fff;border-color:#fff6}.lang-btn[data-astro-cid-3ef6ksr2].lang-ja{background-color:#22d3ee;border-color:#22d3ee;color:#0f0f13}.lang-btn[data-astro-cid-3ef6ksr2].lang-ja:hover{background-color:#06b6d4;border-color:#06b6d4;color:#0f0f13}.lang-btn[data-astro-cid-3ef6ksr2].lang-en{background-color:#e91e8c;border-color:#e91e8c;color:#fff}.lang-btn[data-astro-cid-3ef6ksr2].lang-en:hover{background-color:#c2185b;border-color:#c2185b;color:#fff}.btn-sm[data-astro-cid-3ef6ksr2]{padding:.4rem 1rem;font-size:.875rem}.tier-display[data-astro-cid-3ef6ksr2]{position:absolute;bottom:1.5rem;left:38%;z-index:4;flex-direction:column;align-items:flex-start;gap:.35rem}.tier-text[data-astro-cid-3ef6ksr2]{white-space:nowrap}.tier-label[data-astro-cid-3ef6ksr2]{color:#ffffffbf;font-size:.8rem;text-shadow:0 1px 4px rgba(0,0,0,.7)}.tier-name[data-astro-cid-3ef6ksr2]{color:#ffffffe6;font-size:.85rem;font-weight:600;text-shadow:0 1px 4px rgba(0,0,0,.7)}.tier-link[data-astro-cid-3ef6ksr2]{display:inline-block;line-height:0}.tier-link[data-astro-cid-3ef6ksr2]:hover .tier-image[data-astro-cid-3ef6ksr2]{border-color:#ffffffe6;box-shadow:0 4px 16px #0009}.tier-image[data-astro-cid-3ef6ksr2]{height:96px;width:auto;max-width:none;border-radius:.5rem;border:2px solid rgba(255,255,255,.6);object-fit:contain;background:#ffffff80;box-shadow:0 2px 8px #0006}.tier-no-image[data-astro-cid-3ef6ksr2]{display:none;padding:.75rem 1.25rem;background:#ffffff80;border-radius:.5rem;border:2px solid rgba(255,255,255,.6);backdrop-filter:blur(4px)}.tier-upgrade-link[data-astro-cid-3ef6ksr2]{color:#1a1a2e;font-size:.9rem;font-weight:600;text-decoration:none;white-space:nowrap}.tier-upgrade-link[data-astro-cid-3ef6ksr2]:hover{text-decoration:underline}