:root{--bg: #f1f0ef;--surface: #dcd6d0;--text: #0b0b0f;--muted: #4a4a55;--primary: #b4b644;--accent: #4591a8;--color-accent: var(--accent);--color-bg: var(--bg);--color-bg-card: #ffffff;--color-bg-input: var(--surface);--color-border: #e6e4e0;--color-text: var(--text);--color-text-muted: var(--muted);--color-primary: var(--primary);--color-primary-hover: #a0a23d;--color-error: #ef4444;--color-success: #22c55e;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-full: 9999px;--shadow-sm: 0 2px 4px rgba(11, 11, 15, .05);--shadow-md: 0 4px 12px rgba(11, 11, 15, .08);--shadow-float: 0 8px 24px rgba(11, 11, 15, .12)}*,*:before,*:after{box-sizing:border-box}html{font-size:16px}body{margin:0;padding:0;font-family:var(--font-sans),var(--font-ja);background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh}#root{min-height:100vh}h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.02em}h1{font-size:1.8rem;color:var(--color-text)}h2{font-size:1.4rem;margin-bottom:var(--space-md)}h3{font-size:1.25rem;display:flex;align-items:baseline;gap:.5em}p{margin:0 0 var(--space-md)}a{color:var(--color-accent);text-decoration:none;transition:color .2s;font-weight:500}a:hover{text-decoration:underline}.app-container{max-width:1000px;margin:0 auto;padding:var(--space-xl) var(--space-md);min-height:100vh}.two-column{display:grid;grid-template-columns:1fr 340px;gap:var(--space-xl);align-items:start}@media(max-width:900px){.two-column{grid-template-columns:1fr}}.header{text-align:center;margin-bottom:var(--space-2xl);padding-bottom:0}.header h1{font-size:2rem;color:var(--color-text);margin-bottom:var(--space-xs)}.header-sub{color:var(--color-text-muted);font-size:.95rem;font-weight:500}.header-badges{display:flex;justify-content:center;gap:var(--space-sm);margin-top:var(--space-md)}.badge{display:inline-flex;align-items:center;gap:var(--space-xs);padding:4px 10px;background:#fff;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;color:var(--color-text-muted);box-shadow:var(--shadow-sm)}.card{background:var(--color-bg-card);border-radius:var(--radius-lg);padding:var(--space-xl);margin-bottom:var(--space-xl);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.card-title{font-size:1.2rem;font-weight:700;margin-bottom:var(--space-lg);color:var(--color-text)}.input-group{margin-bottom:var(--space-xl)}.input-label{display:block;font-size:.9rem;font-weight:700;margin-bottom:var(--space-sm);color:var(--color-text)}.input-text{width:100%;padding:var(--space-md) var(--space-lg);background:var(--color-bg-input);border:2px solid transparent;border-radius:var(--radius-md);color:var(--color-text);font-size:1rem;font-weight:500;font-family:inherit;transition:all .2s}.input-text:focus{outline:none;background:#fff;border-color:var(--color-primary);box-shadow:0 0 0 4px #b4b64433}.input-text::placeholder{color:#7a7a85}.checkbox-group{display:flex;flex-direction:column;gap:var(--space-md);background:#fff;border-radius:var(--radius-md)}.checkbox-label{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:1rem;font-weight:600;padding:var(--space-md);background:#fff;border:2px solid var(--color-bg-input);border-radius:var(--radius-md);transition:all .2s}.checkbox-label:hover{border-color:var(--color-primary)}.checkbox-label input[type=checkbox]{appearance:none;-webkit-appearance:none;width:50px;height:28px;background:#e0e0e0;border-radius:999px;position:relative;cursor:pointer;transition:.3s}.checkbox-label input[type=checkbox]:after{content:"";position:absolute;top:2px;left:2px;width:24px;height:24px;background:#fff;border-radius:50%;transition:.3s;box-shadow:0 2px 4px #0003}.checkbox-label input[type=checkbox]:checked{background:var(--color-primary)}.checkbox-label input[type=checkbox]:checked:after{transform:translate(22px)}.file-upload{display:block;border:3px dashed var(--color-bg-input);border-radius:var(--radius-lg);padding:var(--space-2xl) var(--space-lg);text-align:center;cursor:pointer;background:#fff;transition:all .2s}.file-upload:hover{border-color:var(--color-primary);background:#fdfdf9}.file-upload-icon{font-size:2.5rem;margin-bottom:var(--space-sm);color:var(--color-primary);background:#f1f1e8;width:64px;height:64px;line-height:64px;border-radius:50%;margin:0 auto var(--space-md);display:block}.file-upload-text{font-weight:700;color:var(--color-text);margin-bottom:var(--space-xs)}.file-upload-hint{font-size:.8rem;color:var(--color-text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-size:1.1rem;font-weight:700;font-family:inherit;border:none;border-radius:var(--radius-full);cursor:pointer;transition:all .2s;width:100%}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 4px #8f9132;margin-bottom:4px}.btn-primary:hover{background:var(--color-primary-hover);transform:translateY(2px);box-shadow:0 2px #8f9132}.btn-primary:active{transform:translateY(4px);box-shadow:none}.btn-primary:disabled{background:#ccc;box-shadow:none;transform:none;cursor:not-allowed}a.btn-success,a.btn-success:visited,a.btn-success:hover,a.btn-success:active{color:#fff!important;text-decoration:none;background-color:var(--color-accent)!important;border:none;opacity:1}.btn-success{background-color:var(--color-accent);color:#fff!important;box-shadow:0 4px #326f82}.btn-success:hover{background-color:#3a7a8f;transform:translateY(2px);box-shadow:0 2px #326f82}.spotify-embed-container{width:100%}.spotify-embed-container iframe{display:block;border:none;margin-bottom:4px}.pr-text{text-align:right;font-size:.7rem;color:var(--color-accent);opacity:1;padding-right:4px}.sidebar{position:sticky;top:var(--space-lg)}.accordion{background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-md);overflow:hidden;margin-bottom:var(--space-lg)}.accordion-header{width:100%;padding:var(--space-md) var(--space-lg);background:transparent;border:none;color:var(--color-text);font-size:1rem;font-weight:700;font-family:inherit;cursor:pointer;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--color-bg)}.accordion-icon{color:var(--color-primary);font-weight:700}.accordion-content{padding:var(--space-lg);font-size:.9rem;color:var(--color-text-muted);background:#fcfcfc}.message{padding:var(--space-md);border-radius:var(--radius-md);margin-bottom:var(--space-md);font-size:.95rem;font-weight:500;text-align:center}.message-error{background:#ffebee;color:var(--color-error);border:1px solid #ffcdd2}.loading-spinner{display:inline-block;width:24px;height:24px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}footer{text-align:center;color:var(--color-text-muted);font-size:.85rem;margin-top:var(--space-2xl)}