:root{--color-bg: #f5f5f7;--color-surface: #ffffff;--color-surface-hover: #f5f5f5;--color-surface-active: #ebebeb;--color-border: #e0e0e0;--color-border-light: #f0f0f0;--color-text: #1a1a1a;--color-text-secondary: #666666;--color-text-muted: #999999;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-light: #dbeafe;--color-danger: #dc2626;--color-danger-hover: #b91c1c;--color-danger-light: #fee2e2;--color-success: #16a34a;--color-success-light: #dcfce7;--color-warning: #f59e0b;--color-warning-light: #fef3c7;--color-overlay: rgba(0, 0, 0, .4);--color-today: #2563eb;--color-today-light: #eff6ff;--color-overdue: #dc2626;--color-overdue-light: #fef2f2;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 30px rgba(0, 0, 0, .12);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", 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