:root{--color-bg: #ffffff;--color-bg-secondary: #f3f4f6;--color-text: #111827;--color-text-secondary: #6b7280;--color-primary: #6366f1;--color-primary-hover: #4f46e5;--color-border: #e5e7eb;--color-card-bg: #ffffff;--color-card-shadow: rgba(0, 0, 0, .08);--color-danger: #ef4444;--color-success: #22c55e;--radius: 8px;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif}@media(prefers-color-scheme:dark){:root{--color-bg: #0f172a;--color-bg-secondary: #1e293b;--color-text: #f1f5f9;--color-text-secondary: #94a3b8;--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-border: #334155;--color-card-bg: #1e293b;--color-card-shadow: rgba(0, 0, 0, .3);--color-danger: #f87171;--color-success: #4ade80}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:.875rem;font-weight:600;padding:.5rem 1rem;border:none;border-radius:var(--radius);cursor:pointer;background-color:var(--color-primary);color:#fff;transition:background-color .15s ease}button:hover{background-color:var(--color-primary-hover)}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{font-family:inherit;font-size:.875rem;padding:.5rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius);background-color:var(--color-bg);color:var(--color-text);outline:none;transition:border-color .15s ease}input:focus,select:focus,textarea:focus{border-color:var(--color-primary)}#root{min-height:100vh;display:flex;flex-direction:column}