:root{--color-bg: #f5f7fb;--color-surface: #ffffff;--color-border: #e3e8f0;--color-text: #1b2536;--color-muted: #6b7891;--color-accent: #1f6feb;--color-accent-dark: #164fae;--radius: 12px;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);font-family:Hiragino Sans,Noto Sans JP,Segoe UI,system-ui,sans-serif;color:var(--color-text)}*{box-sizing:border-box}html,body,#root{width:100%;margin:0;padding:0;min-height:100%;background:var(--color-bg)}.app{display:flex;flex-direction:column;width:100%;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:14px 28px;background:var(--color-surface);border-bottom:1px solid 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