:root{--color-bg: #ffffff;--color-surface: #f8f9fb;--color-border: #d9dde3;--color-text: #1f2328;--color-text-muted: #5f6672;--color-primary: #1d4ed8;--color-primary-dark: #1739a3;--color-danger: #dc2626;--font-base: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font-base);background-color:var(--color-surface);color:var(--color-text);font-size:16px;line-height:1.6}a{color:inherit}.app-loading{min-height:100vh;display:flex;align-items:center;justify-content:center;color:var(--color-text-muted);font-size:15px}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{background-color:var(--color-bg);border-bottom:1px solid var(--color-border);padding:14px 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